Headers & Exhaust Tested on 2008 Viper @ Chrysler Proving Grounds
Today we tested our One Lap ACR equipped with Hennessey Long-tube Stainless Steel Headers & 3 inch Exhaust plus drop-in K&N filter. Development engineer, Chris Winkler, gained over a full second improvement compared to the stock ACR. Testing was performed at the Chrysler Proving Grounds in Chelsea, MI.
This is the same system that helped power our Venom 650R package to a 10.77 @ 131 mph run in drag radials.
What's the difference between your headers and exhaust and Belanger's system? I'm not looking for secret header info, but just trying to make a determination as to where I'm going to drop some serious cash in a few months?
What's the difference between your headers and exhaust and Belanger's system? I'm not looking for secret header info, but just trying to make a determination as to where I'm going to drop some serious cash in a few months?
We use a 5 into 1 merge collector made by Burns stainless with longer primary tubes. Our system is 100% stainless steel.
Bellanger's kit is a tri-Y design and made out of mild steel which is thermal coated.
Norm Koerner tested both systems on his 9-sec. NA Gen 2 Viper. There is a thread about it on the alley somewhere.
Lou does not use SS. I know that part of Lou's reasoning for not using SS is because they hold and radiate MUCH more heat than his aluminized and double coated design, which is very important to Viper owners especially. Plus they are a lot less prone to cracking/leaking. These headers are even getting dyno and testing time at Mclaren.
Lou does not use SS. I know that part of Lou's reasoning for not using SS is because they hold and radiate MUCH more heat than his aluminized and double coated design, which is very important to Viper owners especially. Plus they are a lot less prone to cracking/leaking. These headers are even getting dyno and testing time at Mclaren.
ive heard that story for many years now. ask any pilot or any aircraft mechanic what material is used on every aircraft exhaust system on the planet. answer is stainless steel. if there was a benefit to using coated mild steel over stainless then airplanes would be running it too. but there is not.
mild steel is far cheaper and is also easier to cut and weld. i am not disparaging the bellanger product as i know it makes power and looks / fits well. but to suggest that any mild steel exhaust system is superior to a stainless system is just pure salesman baloney.
SRT is now testing our system for the 2008 Viper. We have shown a 1 second per lap improvement on the 2008 ACR at the Chrysler proving grounds. This system will go on the SRT engine dyno after the One Lap of America race. It will be interesting to see how the 2 systems compare on power and torque.
A lot of people own the Bellanger system and are happy with it. So dont be offended by my comments if you have this system. Our system is more expensive than the mild steel Bellanger system due to the fact that stainless steel and the Burns collectors are very expensive. So I would just like to make the point that if you want a good header system and want something less expensive, call JonB who is Bellangers number one salesman. If you want the best quality along with the best performing system and dont mind paying a bit more, then give us a call. We can only build 1-2 systems per week, so we cant mass produce our system anyway.
Last edited by John Hennessey : May 2nd, 2008 at 07:30 PM.
1... i was under the impression that the belanger and hennessey headers yielded very similar hp gains on the 08 viper...so if hp gains are similar i'm not sure i see any advantage to the hennessey headers
2....woodhouse does claim that the belanger headers are less prone to cracking/leaking
EVERY tube header will crack.. just a matter of time. Jethot coating will chip and flake, a matter of time. SS wont rust, so you CAN wrap it with header wrap... never wrap mild steel headers...
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