| Author | Message | ||
     Ds_tiger |
http://www.youtube.com/watch?v=LZl5yX3_0yg 8 min I am the goofy guy in white shirt Micah is other guy Best we got Cheers! My internet connection is spotty at best so I have not seen it fully at this point... | ||
| Hellgate |
Thanks man. I hope to have mine down there in the next couple of weeks. | ||
| Socoken |
Those brake dynos seem a lot more abusive than the inertia style. That pipe looks great! Nice bike! | ||
| Ds_tiger |
ha! Old saying "You never have true love for your wife until you see her in labor and and you never truly appreciate your bike until its strapped to a dyno! | ||
| 186bigtwin |
Sounded great, I read your full post on the video sidebar. So that equals 144rwhp on a dyno jet dyno? That's cooking. No internal mods? very good................... | ||
| 186bigtwin |
Question: is AF1 racing doing any internal mods to 1125's yet ( porting, cams, pistons )????? | ||
| Ds_tiger |
Not yet | ||
| No_rice |
so basically he says a buell cant make power because the exhaust is under the bike. hmm ok. | ||
| Hellgate |
No he's saying because it is unequal length and not an equal length system, not because it is under the bike. | ||
| Xb9 |
unequal length and not an equal length system +1 Cause of the AFV disparity we are seeing with some aftermarket exhausts - front compared to rear?  | ||
| Xl1200r |
The stock can is unequal length as well. 'Splain that. | ||
| Xb9 |
Explain the larger disparity. There is a disparity with the stock can, just not as much. I don't know I'm not an exhaust system designer, just speculating  (Message edited by xb9 on March 10, 2009) | ||
| 186bigtwin |
Developement work will continue; if someone finds a better exhaust we'll all know about it as soon as it exist. Remember that old VR-1000? They used about 10 different exhaust on that. If someone wants to go superbike racing with an 1125 alot of things will have to change, the target Ducati has around 190rwhp on their WSB bikes. That's along way off, but not out of the question........ Just time , work and alot of $$$$$$$$$$$$ | ||
| Carbonbigfoot |
Do you mean that the header pipes (from block to collector) are of unequal length? Just making sure I understand. R | ||
| Hellgate |
Yes - hence the crazy stock reflecting, morphing, sound wave bouncing, chambered, acoustically tuned muffler box thingie. This is what would work much better with our engine configuration. It doesn't mean the mufflers need to stick up but it means the exhaust needs the equal length pipes in a 2 into 2 system. I can see the hate mail coming now...  | ||
| Carbonbigfoot |
Equal length up to the collector would to the same thing, right? To me it looks like the front tube is shorter, just need to fab one that's longer? Maybe I'm missing something, but that should be an easy fix. R | ||
| Bob_thompson |
Just wondering here guys with some speculation and I agree that in most engine configurations, V8, V6, Inline 4's, 6's and probably V4's equal length primary pipes, to the collector, sized(diameter) to cylinder flow is the way to go, and in the case of collectors only. Straight pipes, even with mufflers is another story. But I'm wondering about two things; any of the odd degree V2's as in 45, 60, 90, 72 degree, etc. It seems as though they are getting more horsepower without too much matter in pipe length to the collector. Maybe something to do with the odd flow characteristics of the V2's firing order. Also looking at the 1125 stock muffler cutaway, the primary tubes might just continue into the housing and end up equal length much longer then we suspect and one of the reasons for the great mid-range of our engines.....?????? | ||
| Hellgate |
Yes the front header needs to be of equal length to the rear header but then there is the stock muffler that they would attach to. Many of the 2 into 2 systems use an X pipe, so I think the whole thing needs to be redesigned. I'd think there would be a way to "coil", if you will, the exhaust under the bike. Heck I'd even be open to a shorter muffler on each side of the bike. | ||
| Carbonbigfoot |
On the stocker, I don't think there is any separate plumbing after the connection. The only way to go would be a redesigned front cyl pipe. Just snake it around a little more, and Bob's your uncle. (See Occam's Razor) R (Message edited by CarbonBigfoot on March 11, 2009) | ||
| Easyrider |
Just my 2 cents, It's not proven that equal length headers, will give you more power in the same configuration as using stock headers without, taking care of the ignition and fuel map. | ||
| Carbonbigfoot |
This is more about making it even, via the AFV values for each cyl. Not forcing the ECM to compensate for an asymetric assembly. R | ||
| Easyrider |
Carbonbigfoot, even then there are too many variables, to say this would be the solution. When the front and rear data in the ECM, have the right setup, this would be possible. Only it's (matter of speak) in the basic not a good cooking book too start with. In the front you make the breakfast, and in the rear you make the lunch, And we all want too eat dinner?. (is this making sense) (-; | ||
| Junkyrddog780 |
Its just like the story of the grasshopper and the octopus. All year long the grasshopper kept burying acorns for winter while the octopus mooched off his girlfriend and watched TV. Then the winter came, and the grasshopper died, and the octopus ate all his acorns and also he got a racecar. Is any of this getting through to you?" | ||
| Kds1 |
equal length is more important on straight pipes w/out collector and muffler....header is not the primary power maker, more on the lines of changing the powerband.....a restrictive header is a problem though but the port size is more than ample.....my .02cents...some will not agree with what I say but its alright, I know what works for me and keeping it simple is easier to control... Kevin www.kdfab.com | ||
| Rfischer |
just guessin' here........Buell & Co. have quite likely forgotten more about exhaust gas dynamics than the rest of us are ever going to know. I am unaware of any aftermarket supplier of mufflers that can better the stock power output of the 1125, AND meet EPA/DOT regs. I'll add that for off-road racing applications I doubt any aftermarket vendor will beat the power output of the factory 1125 race exhaust [again, while meeting AMA or any other sanctioning body noise regs.] The simple fact is that Buell has engineering resources beyond anything an aftermarket vendor can muster. The aesthetics of an aftermarket product may be superior as the pricepoint can be more flexible than the costs a vehicle mfr. has to have regard for, but not the engineering. | ||
| Hellgate |
I respectively disagree Rfischer. There are a great deal of craptacular exhaust systems out there, however there are some outstanding ones, Akrapovic is one of them. With their street systems they outperform stock on the dyno and meet the 80db sound requirement, and with the twist of 4mm bolt you can pull out the db killer and enjoy the sound. Their fit and finish is first rate too. I have no idea why Buell designed the 11's muffler the way they did. When I first say the prototypes being tested by journalists in June of '07 I figured, along with some of them, that the muffler was a prototype. Well we were right, the production muffler got chrome tips. I think the muffler is a sales killer and something, pretty much anything would have been a better design. | ||
| Redbuelljunkie |
I think the muffler is a sales killer and something, pretty much anything would have been a better design. I agree with you in theory... I believe there is some incredible engineering inside the stock muffler, but the design/cosmetics are totally unacceptable and should never have made it to the sales floor. At a minimum, the whole thing should have been hidden under a full belly pan and kept out of sight. | ||
| Hellgate |
I agree, to a point on the engineering argument but that thing is a big visual NO-GO, its fugly. I suspect the Company felt they were committed to placing the muffler under the bike because that was the only place they could put it due to the Triad, as a result we've got what we've got. I think that if the Kool-Aide had been diluted, just a bit, a proper exhaust could have/should have been designed. Proper being, good performance, visually appealing and quiet. | ||
| The_italian_job |
so is the Akrapovic already in the market? do you know where to find it? I put my 1098 on sale cause I wanna purchase a CR, but my major issues are the air scoops and the exhaust, to change immediately! I heard from you guys that the Buell race system is the best in the market, but I've never seen a picture. anybody has one? and also, do you think it'd be possible to have a third person purchase the system for me, somebody who has the license? | ||
| Fresnobuell |
Save the welds, I LIKE the looks of the stock muffler. I looks like it fits the bottom of the motor, unlike virtually all the aftermarket choices. What I think is ugly is all the empty space left by the supposedly superior aftermarket systems. |
