Riders Of Vision

General => TechTalk => Topic started by: Tiger on November 24, 2007, 05:37:01 PM

Title: Custom exhaust maybe...
Post by: Tiger on November 24, 2007, 05:37:01 PM
 :) I'm thinking that, just maybe, over the winter period...trying to fashion a 2 into 1 system for one of my Vision's... :-\

I could use: The MAC front pipe, the rear "Y", have another piece fashioned from the "Y" to the end the front pipe, use another "Y" to bleed into a slip on...R6 stock, Kerker, etc... 8)

What say you, those smarter than I... :-\

Any reason(s) why it would/wouldn't work... :-\

Your thoughts and idea's please... ;)

                 
8).......TIGER....... 8)
Title: Re: Custom exhaust maybe...
Post by: h2olawyer on November 24, 2007, 05:57:29 PM
I've been playing mental gymnastics with about the same idea.  Haven't found a why not yet.  Something about great minds . . .

H2O
Title: Re: Custom exhaust maybe...
Post by: Lucky on November 24, 2007, 06:21:20 PM
I think as long as you end the system with...forget the name...the plates you add or subtract to change backpressure.  you'd be fine, it'd be more $$, but if your going to do it right...
Title: Re: Custom exhaust maybe...
Post by: YellowJacket! on November 24, 2007, 07:01:29 PM
Baffels?

David
Title: Re: Custom exhaust maybe...
Post by: louthepou on November 24, 2007, 07:52:41 PM
That's "baffles", Dave. :)

(unless it's made from glueing together bagels, so a baffle made from bagels would be a baffel).

(what have I been drinking)

Tiger, I've been thinking about that stuff for quite a while too. I guess what's stopping me is that, to do a good, proper job, a pipe bender (the type that's not too expensive when on sale at Princess Auto) would be key I believe. I do have the MIG welder, so now I'm just one tool away from being ready to try.

I think that starting from good quality, right gauge pipe is also better than playing around with too-thin off the shelf repair parts from the auto parts store (like what you find in the bins at Canadian Tire on this side of the border).

Lou
Title: Re: Custom exhaust maybe...
Post by: QBS on November 24, 2007, 08:56:16 PM
Contact Ron McCoy.  Have seen his custom system and it's on the same level as the Preditor system in every way except price.
Title: Re: Custom exhaust maybe...
Post by: Extent on November 24, 2007, 09:36:27 PM
I've been thinking about a custom exhaust as well.  Planning on putting it together with donuts and u-bends as needed, not as smooth as bent tubing, but hopefully a little easier to put together.

My biggest question mark is what to do about mounting it up to the head (well that and choosing runner lengths), my fallback is to just chop up the stock system for as much as possible.
Title: Re: Custom exhaust maybe...
Post by: h2olawyer on November 24, 2007, 10:35:41 PM
Quote from: Lucky on November 24, 2007, 06:21:20 PM
I think as long as you end the system with...forget the name...the plates you add or subtract to change backpressure.  you'd be fine, it'd be more $$, but if your going to do it right...

Sounds like a Supertrapp silencer.  That's what I was considering using & even though it would drive up the cost, doing it as a dual system, kind of like the MACs but with a silencer on each side, eliminating the necessity of removing the lower MAC can when servicing the rear wheel / tire.

H2O
Title: Re: Custom exhaust maybe...
Post by: Rick G on November 24, 2007, 11:22:36 PM
A visionary in Mn , DT, built such an exhaust system  it worked and looked great!  he used the front pipe from the MAC exhaust . When he sold the bike the new owner didn't want the MACs so he gave then to me  , I'm still running them. I've thought about a custom system , but I've got so many things going I never get to it.
Title: Re: Custom exhaust maybe...
Post by: XZv2 on November 25, 2007, 04:44:43 AM
Tiger, I have a left-side-only silencer system on my present XZ with sidecar (converted standard parts, eh Dutch imitation of standard parts) and I am making an only-left-side system for my future XZ with sidecar.
I do not understand why all aftermarket single-silencer-systems are at the right side. It is so much easier to remove your rear wheel if your silencer is at the left side. Your axle goes out right and you have more room to wriggle out the wheel if there 's no silencer.....
I did not find any disadvantage of the left side set-up. I would like such a system for my non-sidecar XZ also.

If you make a complete system from scratch, I advise a left side silencer or complete left side system. My two eurocents.....
XZv2
Title: Re: Custom exhaust maybe...
Post by: arfa vmax on November 25, 2007, 04:57:19 AM
my standard system looks in good nick an the p/o has had the down pipes made from stainless steel.I was thinking about making a single rear pipe system using the stainless pipes but so the original system could be refitted for the mot test as they are getting a bit keen on none standard pipes over here.I used to make most of my replacement systems up with exhaust sections from my local car breakers.Its amazing how many people fit new exhausts then scrap the car.
Title: Re: Custom exhaust maybe...
Post by: Tiger on November 25, 2007, 08:32:36 AM
 :) I think the after market system's go up the right side to give the "V" a symetrical balance...given that the drive unit is on the left side. However, I think XZv2 idea is a sensible one. Mounting an exhaust on the left side makes it easier to: Remove the rear wheel, adjust the rear brake, check the brake stabiliser bar fastener's, etc... 8)

arfa vmax your a man after my own heart ;) I used to love the old wrecker's yard's back in the U.K. I got many a good bargain from them, especially exhaust system's...car and bike ;D :D :D :D

Like your thinking 'Pou...Princess auto for a pipe bender...Hmmmmm, "Hey Honey I think you can buy me a pipe bender for Christmas" ;D ;D :D :D :D :D :D.... 8)

Thanks for the input everyone...keep it coming 8) I think we may see several custom exhaust's next spring, eh!!!

                       
8).......TIGER....... 8)

p.s. Does anyone have picture's of their custom system that they can post ??? ??? ???

Title: Re: Custom exhaust maybe...
Post by: Brian_Matthewson on November 25, 2007, 08:40:26 AM
I've also been thinking about a custom 2 into 1 exhaust, starting with the Mac front pipe.
Take a look at Superfly's V in the gallery, about 5 rows down, it uses a Supertrapp and he says he loves it. He found the "Y" pipe in a scrapyard.
Title: Re: Custom exhaust maybe...
Post by: jasonm. on November 25, 2007, 12:16:02 PM
One thing not to forget is the weight on the rear "Y pipe". That Y pipe only has 2 copper rings and compression clamps. It is not the strongest design. In the stock design, most of the weight is supported by the passanger peg brackets and the stiff front pipes meeting in the middle. As long as it is no heavier than a MAC rear pipe you will be fine.
Title: Re: Custom exhaust maybe...
Post by: Extent on November 25, 2007, 04:07:18 PM
I thought a bit about the right v. left thing myself, I think there was a little more room for the plumbing if it was on the right, but I'm going to try for a highmout right side exhaust myself for mostly vanity reasons.  It doesn't hide any of the "cool" side of the swingarm and it helps to hide some of the spindly right side.  It shows off the exhaust better when parked, since it leans left, and heat can dissipate up and away from the bike, rather than into the tail plastics.  It'll help counterbalance the shaft weight.  And most importantly I always seem to fall on my left side :D

I want to try and get rid of the stock Y pipe configuration and replace it all with slipjointed springs.
Title: Re: Custom exhaust maybe...
Post by: louthepou on November 25, 2007, 05:08:13 PM
Ok, anyone would see a problem with welding the Y pipe to the parts that receive it exiting the cylinder head? These two thingies are bolted on the head, and they look like normal steel... unless I'm missing something, that sounds like a potential plan?

I think I'm talking about parts 3 and 4 on this picture.

(http://img410.imageshack.us/img410/7577/partimage1tc7.gif)
Title: Re: Custom exhaust maybe...
Post by: Tiger on November 25, 2007, 05:50:53 PM
 :) 'Pou, that would give you a, sort of, front head exhaust set up...one more less leakable joint area ::) That would also eliminate Jasonm's concern... ;)
Depending on the "other end" set-up, would you be able to get the newly welded "Y" pipe up and in, from underneath the "V"... or ???

                   
8).......TIGER....... 8)
Title: Re: Custom exhaust maybe...
Post by: louthepou on November 25, 2007, 05:54:53 PM
Nope, indeed. That would have to be done with the engine out of the frame, with the new "upgraded" Y (should I start refferning to is as "Super Y"?) then bolted on, and then slide the engine back in the frame.

But once it's done, no more bleeding finger joints trying to slip the clamps and the copper washers on...

Lou
Title: Re: Custom exhaust maybe...
Post by: Tiger on November 25, 2007, 06:05:58 PM
Quote from: louthepou on November 25, 2007, 05:54:53 PM
But once it's done, no more bleeding finger joints trying to slip the clamps and the copper washers on...
Lou

8)...BONUS... 8)
Title: Re: Custom exhaust maybe...
Post by: Night Vision on November 25, 2007, 07:25:31 PM
Quote from: Tiger on November 25, 2007, 05:50:53 PM
......would you be able to get the newly welded "Y" pipe up and in, from underneath the "V"... or ???

Quote from: louthepou on November 25, 2007, 05:54:53 PM
Nope, indeed. That would have to be done with the engine out of the frame, with the new "upgraded" Y (should I start refferning to is as "Super Y"?) then bolted on, and then slide the engine back in the frame.

you should be able to put the Super Y in without dropping engine... basically, your Super Y is the same setup as the predator:

http://www.ridersofvision.net/Links/Predator/predator.html

Title: Re: Custom exhaust maybe...
Post by: Kenny on November 25, 2007, 07:32:54 PM
   I looked at Ron McCoy's pipe out in Co. it sounds a bit different than the Predator, it is the only one I have seen that exits on the left side of the bike. Which is not a bad thing just different.
    I also cannot see any problem with welding the " Y " pipe to items  # 3 & 4. The Predator has no joints in this area only clamps. You would probably need to tack weld the pipes while in position for correct alignment.
     I'm looking forward to seeing your set up this spring Tiger.
                                         Cheers Ken S.
Title: Re: Custom exhaust maybe...
Post by: QBS on November 25, 2007, 08:14:18 PM
FYI: Predator states that all parts are available seperately. 
Title: Re: Custom exhaust maybe...
Post by: kwells on November 25, 2007, 08:21:13 PM
So Ron, any pre-production thoughts on your patented exhaust system?
Title: Re: Custom exhaust maybe...
Post by: Night Vision on November 25, 2007, 08:22:52 PM
Quote from: QBS on November 25, 2007, 08:14:18 PM
FYI: Predator states that all parts are available seperately. 

the predator Y pipe is not that great... you end up having to remove some of a crossover tube on the bottom of the frame, plus the xz550 is not listed on their site anymore
Title: Re: Custom exhaust maybe...
Post by: Ron_McCoy on November 25, 2007, 09:32:55 PM
If you weld 3&4 to the Y pipe you may not be able to install the Y pipe.  I don't know this for sure, but in my experience it seems likely.  The way I did mine was to install the Y pipe without the #14 rings installed,
clamp the #15 collars to the flanges on # 3&4 with needle nose vice grips or small finger clamps, and tack them to the Y pipe.  Remove the Y pipe and weld out the # 15s.  Reassemble with the copper rings installed and your leaks will be gone and the Y pipe becomes a structural part of the exhaust system. This works with the stock exhaust as well as a custom exhaust. I've been running mine with this modification for over 20 yrs. It put an end to that rear cylinder exhaust leak that sounds like a really loose valve.
Title: Re: Custom exhaust maybe...
Post by: Tiger on November 29, 2007, 06:35:22 PM
 :) I picked up a donor muffler today...its off of a Yamaha R6 8) The thing is in mint condition... :-\ well almost ;) Spent all of $25.00 :o It was the last of two part's the guy had left, after selling his ride... :( His loss my gain... 8)

                 
8).......TIGER....... 8)
Title: Re: Custom exhaust maybe...
Post by: jasonm. on December 02, 2007, 11:47:02 AM
Be nice to see that R6 pipe set up.
Title: Re: Custom exhaust maybe...
Post by: mdskinner731 on December 02, 2007, 09:50:34 PM
theres 2 kinds of loud exhaust on vehicles motorcycle four wheelers ect.. for example.. on my uncles 2003 kawasaki zx6r.. his aftermarket exhaust.. (dunno what it is) is loud and obnoxious.. and annoying..
then theres the nice low sounding loud rumble that makes your heart skip a beat just hearing it.. i like that!!!
kinda like tigers orange vision ;D
Title: Re: Custom exhaust maybe...
Post by: jasonm. on December 08, 2007, 01:04:46 PM
I don't think I saw anyone mention the name of the tunable baffles...Supertrapp is the name. They offer many universal options. Not cheap either. But they are stainless. The thing with this exhaust...the stock mufflers start out 2.5" o.d. I have been toying with cutting off the rotted mufflers on my spare and welding new pipe on. Then supetrapps on each side. I have a write up on it from years ago. But each supertrapp is ~ $150. So x2 is $300..ouch
Title: Re: Custom exhaust maybe...
Post by: Tiger on December 08, 2007, 06:30:39 PM
Quote from: mdskinner731 on December 02, 2007, 09:50:34 PM
...kinda like tigers orange vision ;D

:) Grrrrrrrrrrrrrrrrrrowl baby, growl... 8)

                   
8).......TIGER....... 8)
Title: Re: Custom exhaust maybe...
Post by: Tiger on December 08, 2007, 06:42:51 PM
 :) Jasonm...These might be interesting...

http://cgi.ebay.ca/2-FAT-CAT-Z-S-EXHAUST-RESONATORS-MOTORCYCLE_W0QQitemZ170131883586QQihZ007QQcategoryZ35573QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

                 
8).......TIGER....... 8)
Title: Re: Custom exhaust maybe...
Post by: Night Vision on December 08, 2007, 08:00:09 PM
I think these would work....plus you lose 25lbs and are easier to handle  :D

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=250195338928&indexURL=0#ebayphotohosting

here's a better descrp....

http://cgi.ebay.com/ebaymotors/SUPERTRAPP-SLIP-ON-MUFFLERS-EXHAUST-YAMAHA-V-MAX-VMAX_W0QQcmdZViewItemQQcategoryZ35596QQihZ024QQitemZ370003703446QQrdZ1QQsspagenameZWDVW
Title: Re: Custom exhaust maybe...
Post by: jasonm. on December 14, 2007, 07:40:25 PM
NV. that is Supertrapp. I just would go with a universal unit. They make 3 types...3" disc, 4" disc short body~12" and 4" disc long body~16".   Supertrapps are truly tuneable.
Title: Re: Custom exhaust maybe...
Post by: inanecathode on December 14, 2007, 09:12:16 PM
Does anyone know for sure if the rear Y pipe will bolt to the front cylinder? I heard one yes already just making sure.
Title: Re: Custom exhaust maybe...
Post by: Rick G on December 15, 2007, 12:35:34 AM
You could do it, but plan on welding the whole thing together..
I sold the  exhaust system from the Vision racer to Blake , 4 or 5 years ago , it used a rear Y pipe to siamese the two ports in to one pipe. the angle was a bit wrong but it worked . The thing was so loud  that  it made MACs sound posativly quiet . I seem to remember he was shattering windows near his apartment! ;D I have pics of the system .
Title: Re: Custom exhaust maybe...
Post by: kwells on December 15, 2007, 01:35:17 AM
well lay those pics on us
Title: Re: Custom exhaust maybe...
Post by: Night Vision on December 15, 2007, 04:13:19 PM
Quote from: Rick G on December 15, 2007, 12:35:34 AM

....... the angle was a bit wrong but it worked.....


that's what I saw when I held a Y up next to the front cylinder. the angle of the Y makes it extend quite far forward, not terribly far from the fender, and points straight down.

there wouldn't be a whole lot of ground clearance after an immeditate 90, and there would be a consideral gap before it got back to the engine case. eyeballing it, seems like it would be half way between the fender and the engine case and pretty low to the ground
Title: Re: Custom exhaust maybe...
Post by: Rick G on December 15, 2007, 10:45:28 PM
I'd be pleased to post the pictures of the Vision racer, but I have no idea how to do it . I can ,how ever attach them to an email . Is anyone interested in posting them if I email them to you?
Title: Re: Custom exhaust maybe...
Post by: Extent on December 15, 2007, 11:18:26 PM
I can host them for you, email is in my profile.
Title: Re: Custom exhaust maybe...
Post by: supervision on December 16, 2007, 10:42:06 AM
(//)
Title: Re: Custom exhaust maybe...
Post by: supervision on December 16, 2007, 11:14:58 AM
(http://www.eurospares.com/lavmk3sh.jpg)
Title: Re: Custom exhaust maybe...
Post by: jasonm. on December 16, 2007, 12:48:07 PM
I see someone has an old Honda Hawk...
Title: Re: Custom exhaust maybe...
Post by: Rick G on December 16, 2007, 10:40:57 PM
Thanks Extent, I'll get started on it , this is amajor undertaking , I'm on a dial up!! :D
Title: Re: Custom exhaust maybe...
Post by: VisionMeister on December 16, 2007, 10:48:54 PM
Looks like someone is working on a 305 MotoGP bike.
Looks like skunkworks welding... beautiful.
Should have made it for a vision motor.
Title: Re: Custom exhaust maybe...
Post by: Rick G on December 17, 2007, 01:09:56 AM
Vision racer pics are on there way! maybe we will see the tomorrow.
Title: Re: Custom exhaust maybe...
Post by: Extent on December 17, 2007, 01:44:30 AM
(http://rovmedia.dyndns.org/forum/files/thumbs/t_racer011_701.jpg) (http://"http://rovmedia.dyndns.org/forum/download.php?id=1815")
(http://rovmedia.dyndns.org/forum/files/thumbs/t_racer010_221.jpg) (http://"http://rovmedia.dyndns.org/forum/download.php?id=1816")
(http://rovmedia.dyndns.org/forum/files/thumbs/t_racer009_529.jpg) (http://"http://rovmedia.dyndns.org/forum/download.php?id=1817")
(http://rovmedia.dyndns.org/forum/files/thumbs/t_racer007_245.jpg) (http://"http://rovmedia.dyndns.org/forum/download.php?id=1818")
Title: Re: Custom exhaust maybe...
Post by: kwells on December 17, 2007, 02:04:40 AM
That is definitely an interesting dual pipe design.  Wish we had some sound on that.
Title: Re: Custom exhaust maybe...
Post by: mdskinner731 on December 17, 2007, 03:14:16 PM
that is freakin awsome.. lookin good.. lets get a sound clip of it ???
Title: Re: Custom exhaust maybe...
Post by: Night Vision on December 17, 2007, 09:39:33 PM
that front "yipe" looks better than I thought it would.. nice work Rick, I see you went for equal pipe lenghts.... how'd she go? any re-jetting required?...
Title: Re: Custom exhaust maybe...
Post by: Rick G on December 18, 2007, 02:47:43 AM
I owned the Vision racer for awhile , But I didn't build it.  A friend , Jim Vargo of Vancouver WA. owned it before me , but he didn't build it either. He wanted to get it going , but it had a badly rusted bore on the rear cylinder and he wanted to rebore it. However ,when he realized that no pistons or rings were available , he lost interest. He traded it to me along with a second Vision and  a XS 850 which I sold. The motor from the second vision now lives in my bike (with a different top end) . As we were moving to AZ. I had to scrap the racer. The dual disc front end is on my bike,as is the gas tank, the lowered seat, went to a short legged fellow, on the forum,who sold it not long after. The frame and swing arm sit in my back yard in case I ever need a rear end or swing arm bearings.
I never heard it run , but the carbs were 1 size up on the mains, every thing else was stock.
It would not be impossable to get a sound bite, we only need to ask Stobil , alias, Blake Stoddard,  you can see the left pipe peaking out, from under the bike, in his avatar.
He said the thing was unbelieveably loud , would set of car alarms at 100 yards. He loves it. If we ask him, I'll bet he will record it for us.
John Clemmons , may know more of this bike, it was raced  in the Portland area. John you out there?
Title: Re: Custom exhaust maybe...
Post by: mdskinner731 on December 18, 2007, 03:39:33 PM
actually  come  to  think  of  it  my  old  neighbor  used  to  race  older  yamahas...  i  think  i  remember  him  saying  he  used  to  race  a  vision..  i  kno  he  had  his  old  racer  out  behind  his  house  but  it  was  all  wercked  and  barely  fixable  (not  sure  what  it  was  i  was  to  young  to  remember)  but  ill  look  in  to  it  and  see  if  he  still  has  it!!
Title: Re: Custom exhaust maybe...
Post by: supervision on December 18, 2007, 10:32:52 PM
  I'd like some of this, in Kit forum
  [img][http://www.eurospares.com/wilvisn1.jpg/img]
Title: Re: Custom exhaust maybe...
Post by: supervision on December 18, 2007, 10:33:58 PM
(//)
Title: Re: Custom exhaust maybe...
Post by: supervision on December 18, 2007, 10:40:20 PM
(http://www.eurospares.com/gsvisn2.jpg)
Title: Re: Custom exhaust maybe...
Post by: QBS on December 19, 2007, 06:02:11 PM
Wow! Tricked to the max.  Bet valve adjusting was zero fun.
Title: Re: Custom exhaust maybe...
Post by: Tiger on January 16, 2008, 04:44:31 PM
 :) I've now got a buddy of mine to make a "Y" pipe, to link the two exhaust pipe's into the R6 muffler. Once I get it back I can see how it all fit's and looks... ::), get her fired up and see how she runs...when the snow goes away!!!

         
8).......TIGER....... 8)
Title: Re: Custom exhaust maybe...
Post by: inanecathode on January 16, 2008, 11:39:30 PM
DOOOOOOOOD!
Get him to make a few of them. The Y pipe is the hardest part of making an exhaust.
Title: Re: Custom exhaust maybe...
Post by: kiwibum on January 24, 2008, 04:58:17 AM
Quote from: Ron_McCoy on November 25, 2007, 09:32:55 PM
clamp the #15 collars to the flanges on # 3&4 with needle nose vice grips or small finger clamps, and tack them to the Y pipe.  Remove the Y pipe and weld out the # 15s.

Thanks for this advice Ron, I did this upgrade on a 400 I'm selling. Be aware it also requires a small amount of metal removed on the frame to be able to re-insert the Y into place. Doing it this way also enabled me to use standard exhaust copper crush o-rings rather than special order Yamaha solid copper rings. Seems to be working just fine after a 20km test ride.
Title: Re: Custom exhaust maybe...
Post by: kiwibum on January 24, 2008, 05:19:00 AM
Here is some photos of a modified exhaust on one of my 400's, it's a very nice little adapter pipe welded  out of cut U bends (I'm assuming this is how it was made, I didn't make it but it's welded out of short curved bits) with a single baffle exiting out the RHS. Sounds much nicer than the standard twin pipes as well.
(http://www.kiwibum.com/images/stories/projects/xz/exhaust1sm.JPG)(http://www.kiwibum.com/images/stories/projects/xz/exhaust2sm.JPG)(http://www.kiwibum.com/images/stories/projects/xz/exhaust3sm.JPG)(http://www.kiwibum.com/images/stories/projects/xz/exhaust4sm.JPG)(http://www.kiwibum.com/images/stories/projects/xz/exhaust5sm.JPG)
Title: Re: Custom exhaust maybe...
Post by: Tiger on January 24, 2008, 05:29:26 AM
 :) Kiwibum...Can you post a "standback" picture, so I can see how it looks mounted altogether please. It looks like a solid job mate.
I'll be using the MAC front pipe, a similar rear pipe that is coming off of the rear MAC muffler and adding a short "Y" section to bring it all together into a single R's muffler... 8)

             
8).......TIGER....... 8)
Title: Re: Custom exhaust maybe...
Post by: kiwibum on January 24, 2008, 06:20:50 AM
Sorry didn't describe that too well, they left the standard front header pipes and rear Y pipe and made a 3-into-1 adapter pipe. Let me know if you require more info.
(http://www.kiwibum.com/images/stories/projects/xz/black400singleexhaust.jpg)
Title: Re: Custom exhaust maybe...
Post by: Tiger on January 24, 2008, 06:26:06 AM
Quote from: kiwibum on January 24, 2008, 06:20:50 AM
Sorry didn't describe that too well, they left the standard front header pipes and rear Y pipe and made a 3-into-1 adapter pipe. Let me know if you require more info.
(http://www.kiwibum.com/images/stories/projects/xz/black400singleexhaust.jpg)

:) Thanks mate, appreciate. You have a nice looking ride there, real nice...great job 8)

                         
8).......TIGER....... 8)
Title: Re: Custom exhaust maybe...
Post by: kiwibum on January 24, 2008, 06:51:30 AM
Thanks, I'm selling it, on the local NZ auction site now and just added my other 400 tonight. It looks good in the photo but the previous owner sprayed the engine with zinc-it or silver paint to cover corrosion with over spray on the frame. Will give the new owner something to do tidying it up to make it look shiny again. It's only done 10,000 miles, pulls really well.
Title: Re: Custom exhaust maybe...
Post by: Extent on January 25, 2008, 12:14:33 AM
Does anyone have any thoughts on sizing the exhaust?  The dual 1.5's on the front cyl seem grossly excessive to me.  I haven't been able to find any straightforward references for small displacement engines.

I'm thinking single 1.5" merged to 1.75" out to the can.
Title: Re: Custom exhaust maybe...
Post by: Rick G on January 25, 2008, 12:17:30 AM
Extant,I believe their double wall, Thats why there so heavy .
Title: Re: Custom exhaust maybe...
Post by: inanecathode on January 25, 2008, 01:38:58 AM
Single wall all the way around (maybe its just really thick where i can't see it) i do agree that its a bit excessive size. However the s*it box of an exhaust the stock is takes care of that back pressure thing.
Title: Re: Custom exhaust maybe...
Post by: kiwibum on January 25, 2008, 02:44:27 AM
Quote from: Extent on January 25, 2008, 12:14:33 AM
Does anyone have any thoughts on sizing the exhaust?  The dual 1.5's on the front cyl seem grossly excessive to me.  I haven't been able to find any straightforward references for small displacement engines.

Extent: hunt down a copy of the "Piper tuning manual" by Bob Gayler
http://www.amazon.com/Piper-Tuning-Manual-Robert-Gayler/dp/0854292926/ref=sr_1_1?ie=UTF8&s=books&qid=1201246557&sr=8-1 (http://www.amazon.com/Piper-Tuning-Manual-Robert-Gayler/dp/0854292926/ref=sr_1_1?ie=UTF8&s=books&qid=1201246557&sr=8-1)

This book gives all the calculations for small two and four stroke engines you will ever want. I borrowed it from the library and used it to build an expansion chamber for a go cart years ago, went really well. When I go to make pipes for my XZ this is the book I'll be using.
Title: Re: Custom exhaust maybe...
Post by: jasonm. on February 12, 2008, 08:10:32 PM
My 2 cents. USe the stock chamber and change mufflers if you have to. Or make something like the MAC. The stock chamber balances the front and back cylinders' back pressure. In reality the right exhaust only flows 20% of the rear cylinder while the rest of the rear exhaust goes out the left. This is because of the rear has a shorter path. ... The front is split 50/50 left right. I KNOW I cut a rusted one open.
Title: Re: Custom exhaust maybe...
Post by: Blake on February 14, 2008, 10:45:40 PM
Quote from: Extent on January 25, 2008, 12:14:33 AM
Does anyone have any thoughts on sizing the exhaust?  The dual 1.5's on the front cyl seem grossly excessive to me.  I haven't been able to find any straightforward references for small displacement engines.

I'm thinking single 1.5" merged to 1.75" out to the can.

On the Vision racer exhaust I bought off of Rick G a few years ago, it uses 1.5" pipes for each cylinder and i'd say thats just about perfect.  The bike definately screams to redline (both eagerness and attention wise).  Also note i have k&n individual pod filters on and rejetted so im getting a lot more airflow in to coincide with the ability to get a lot more air out with this exhaust.  I built an exhaust before this one that was 1.75" pipe for each cylinder and the bike simply lost all power above 7k i think. ( it physically wouldn't go past something around 7 or 8k even with extensive jetting.) with that large of diameter for each cylinder you lost all exhaust gas velocity and lost all scavenging effect of the exhaust.

picture of the left side of the bike:
(http://filebox.vt.edu/users/bstoddar/sidevision.jpg)

the front cylinder uses a rear Y pipe along with a couple of 1" diameter mandel bent pipes to connect to the exhaust ports. the 1.5" diameter pipe is simply welded to the stock Y pipe.  pretty decent design, in my opinion.  only real issue is that the stock Y pipe is slightly constrictive and hurts the scavenging effect, albeit ever so slightly.


I actually started on another exhaust, a 4-2-1, that i copied off of a Buell design i once saw but never quite completed it (cut pipes for the 4-2 but never welded together).  if you're looking for a 4-2-1 do 1" from head, and merge those two into a 1.5" pipe, and for the final single pipe i had it going to a single 2" pipe.  I tried to design it like a set of car headers, so that if you keep the lengths of pipe for the front and rear cylinders equal, when you put them into the larger 2" pipe it'll help with the scavenging effect.
Title: Re: Custom exhaust maybe...
Post by: jasonm. on February 18, 2008, 07:01:25 PM
Blake, you hit it exactly...maximum "VELOCITY" at all engine speeds.
Title: Re: Custom exhaust maybe...
Post by: Extent on February 18, 2008, 11:41:59 PM
Doing a tuned 4-2-1 on the V would be pointless performance wise since to the exhaust gasses the system will still look like a 2-1.  As long as you can keep the first stage runners equal length it should be better to merge them as quickly as possible (like right outside the head) and save weight on two pipes per each cylinder.
Title: Re: Custom exhaust maybe...
Post by: Blake on February 19, 2008, 11:31:22 AM
Quote from: Extent on February 18, 2008, 11:41:59 PM
Doing a tuned 4-2-1 on the V would be pointless performance wise since to the exhaust gasses the system will still look like a 2-1.  As long as you can keep the first stage runners equal length it should be better to merge them as quickly as possible (like right outside the head) and save weight on two pipes per each cylinder.

that's exactly how i did it.  agree 100% since its just 2 ports per head flowing the same.  merges as close from the head as possible.  I just said 4-2-1 since theres 4 exhaust ports when in reality its a 2-1 system.  but as best as i can describe it (cant seem to find a picture), the rear exhaust comes out the right side between that little frame gap right behind the rear cylinder and loops around the clutch cover.   the front and rear 1.5" pipes merge somewhere right underneath the clutch, then go to a single 2" pipe up and under the seat.  definitely requires a heat sheild but i just found the look interesting. 
Title: Re: Custom exhaust maybe...
Post by: Extent on February 19, 2008, 04:05:41 PM
I gotcha
Title: Re: Custom exhaust maybe...
Post by: Rick G on February 19, 2008, 10:25:36 PM
Hi Blake , a while ago we were discussing the vision races exhaust and I posted (with help) some pics .
Some wondered if we could get a sound bite of it . can you provide it?
Title: Re: Custom exhaust maybe...
Post by: Blake on February 20, 2008, 02:38:08 PM
Quote from: Rick G on February 19, 2008, 10:25:36 PM
Hi Blake , a while ago we were discussing the vision races exhaust and I posted (with help) some pics .
Some wondered if we could get a sound bite of it . can you provide it?


I'll look around my computer and see if i can find a video.  I dont have the bike with me here (Been in a shed since last summer) so i cant take any new video/sound.
Title: Re: Custom exhaust maybe...
Post by: Tiger on March 02, 2008, 09:04:43 PM
Quote from: Tiger on January 16, 2008, 04:44:31 PM
:) I've now got a buddy of mine to make a "Y" pipe, to link the two exhaust pipe's into the R6 muffler. Once I get it back I can see how it all fit's and looks... ::), get her fired up and see how she runs...when the snow goes away!!!

Barrie, my Goldwing buddy has a nice home workshop...Three lathes, surface grinder, mill, drill press, welding equipment, etc He's a retired machine guy who used to work in the aerospace industry...a really handy guy!!!

Several months ago, he took a 46mm combination wrench, (belonging to CanadianLou), parted off the ring end, faced it and "cold welded" on to it a piece of steel pipe, which he had capped and fitted a 3/8" drive, using an old socket... and viola, a custom made 46mm socket that you can use a torque wrench with and fits over the shaft when doing that thin, 46mm nut, located behind the flywheel...yes, you know the one I mean...the one that the installation guy's in Japan didn't bend the two locking tab's in place and causes the nut to loosen :o cost, including the wrench, time, material's and polishing...only $90.00... 8)

Anyhow, today he delivered a custom "Y" pipe, to connect the two exhaust pipes into the R6 muffler...what a superb bit of fabricating/welding he's done. Made from three pieces of pipe, cut, welded, polished, etc. Cost, including time and material's only $85.00 8) I didn't have time to hook it up this evening, however it will get done in the next week or so 8)

                   
8).......TIGER....... 8)  
Title: Re: Custom exhaust maybe...
Post by: Night Vision on March 02, 2008, 10:13:28 PM
can you send me some pics before it gets all knuckle blooded?
Title: Re: Custom exhaust maybe...
Post by: Tiger on March 03, 2008, 05:28:26 AM
Quote from: Night Vision on March 02, 2008, 10:13:28 PM
can you send me some pics before it gets all knuckle blooded?

;D Sure can. I'll do it after work... ;)
Title: Re: Custom exhaust maybe...
Post by: Cdnlouie on March 04, 2008, 11:54:58 AM
Looking forward to seeing that creation!  Sounds like fun!  ;D

Cdnl
Title: Re: Custom exhaust maybe...
Post by: Tiger on March 05, 2008, 05:16:58 AM
 :) I took some picture's, downloaded them into my computer, but for some reason I can't get them to load up for an e-mail to you N_V... ??? I'll try again a wee bit later.

                       
8).......TIGER....... 8)
Title: Re: Custom exhaust maybe...
Post by: Night Vision on March 05, 2008, 06:59:08 PM
I got 'em.... lets see if this works?.......

(http://shutter10.pictures.aol.com/data/pictures/21/007/7D/9F/2B/1A/5Wm-3M-J9s-9uMt06w6qgyoxT2gKTZS10258.jpg)

(http://shutter08.pictures.aol.com/data/pictures/21/002/36/EA/0A/55/RIAp6XbRO2-jIX5nFUek92y3ni7MZjWJ0258.jpg)

(http://shutter06.pictures.aol.com/data/pictures/21/001/57/FE/20/EC/a7bKCgBRuFr89uiT6m+k5ZVWsFd7feQ80258.jpg)

(http://shutter07.pictures.aol.com/data/pictures/22/005/4F/DE/E9/F3/sAinAhffYOLqISG6deVsV+KKE-MuYUSO0258.jpg)

(http://shutter10.pictures.aol.com/data/pictures/22/002/77/EF/B9/D4/Mu1ozlPfS2TKffgudtPVvjjdD2150vL-0258.jpg)
Title: Re: Custom exhaust maybe...
Post by: Night Vision on March 05, 2008, 07:13:22 PM
whoo hoo.... nice work Barry.

just for clarification... that's not a "Y Pipe" for the rear cylinder. It's a "Y Pipe" to connect the rear cylinder mac exhaust and the front cylinder mac exhaust systems into the R1 can.

Tiger, what size is the outlet on that Y / inlet on the can?

 
Title: Re: Custom exhaust maybe...
Post by: Tiger on March 05, 2008, 09:05:53 PM
Quote from: Night Vision on March 05, 2008, 07:13:22 PM
Tiger, what size is the outlet on that Y / inlet on the can?

:)...2 1/8" I.D...I have it all hooked up...well ummmm, sort of!! I removed the MAC's, cut a wee bit here and bent a wee bit there. I didn't have a clamp for the "Y" outlet/can inlet, so I used aluminum tape as a temp' repair at the joint's and some cord to hold the muffler up...sound really good. A lot quieter ::)

                         
8).......TIGER....... 8)
Title: Re: Custom exhaust maybe...
Post by: Night Vision on March 05, 2008, 09:18:15 PM
that oughta work.... that's pretty similar to the predators... final Y into a can with a 50.8mm / 2" core

make sure she gives me a call  :D :D :D  ;D
Title: Re: Custom exhaust maybe...
Post by: Tiger on March 05, 2008, 09:25:29 PM
 ;D :D :D :D :D :D :D :D Thanks for posting the pics N_V 8)
Title: Re: Custom exhaust maybe...
Post by: Tiger on March 08, 2008, 02:41:30 PM
 ::) Bugger it, I've gone back to the MAC's!!!!!
The R6 muffler sounded good, however, it stuck out past the licence plate by 3 or 4 inches and because its a fat muffler, it would have come into contact with the rear axle every time the swing arm moved up ('n down), unless I pointed the thing outward away from the bike...and that looked really stupid. Ah well, nothing ventured, nothing gained...besides, as I've said before...I LOVE MY MAC'S .

                     
8).......TIGER....... 8)
Title: Re: Custom exhaust maybe...
Post by: Night Vision on March 08, 2008, 05:08:04 PM
look for another can?
Title: Re: Custom exhaust maybe...
Post by: pullshocks on March 08, 2008, 06:37:30 PM
Did you take a picture of it?
Title: Re: Custom exhaust maybe...
Post by: Tiger on March 08, 2008, 10:02:12 PM
Quote from: Night Vision on March 08, 2008, 05:08:04 PM
look for another can?

:-\ Hmmmm, maybe  ;)

Quote from: pullshocks on March 08, 2008, 06:37:30 PM
Did you take a picture of it?

::) Nope!!
Title: Re: Custom exhaust maybe...
Post by: kiawrench on March 09, 2008, 10:51:40 AM
uh , tiger,,, if it hits,, you could always "adapt'  the can just a bit, if you only need a half inch or so, by creating a shallow indent where clearance is needed , , your friends shop would have just the tools for that. have seen quite a few bikes with rear side of can set in a bit to clear something or other.
Title: Re: Custom exhaust maybe...
Post by: Ron_McCoy on March 09, 2008, 12:53:29 PM
Mine has been "clearanced" to clear the axle at full compression of the rear suspension.  Got it right on the second try.  Otherwise you have to mount the can too far out or too high.