Contour Enthusiasts Group Archives Forums Modifications Duratec Performance DemonSVT exhaust question revisited!!!

I'm restarting this discussion since there seems to be so many varying opinions on the subject. Please refer to the original discussion if you are unfamiliar. DemonSVT wrote,"Actually I'm willing to bet any crush bent system will not outperform the stock SVT exhaust (which is mandrel bent BTW) with the resonator removed or probably even with it just replaced with a quality unit! Well, Cawong11 showed a dyno test proving him wrong. A quality crush bend can improve performance over the stock svt exhaust. Last night I crawled under my 2002 Maxima se to see the stock exhaust and boy does the pipe narrow at points. In one place it actually is reduced at least 50%. Using a friends gtech last night I recorded 0-60 5.6 sec and 1/4 mile 14.3 with the stock maxima . On the 99 contour se sport with BAT intake and Custom bent exhaust with glassback and bullet muffler I recorded 0-60 6.5 1/4 mile 15.3. This was using a competion Gtech pro.

Made a mistake! on the contour the 1/4 mile was 15.1. I'm not the best at typing.

And the point of this is????

Wow, you compared an apple to an orange. You can't compare exhaust with two different car/platform/motor. Finding two contours that respond the same to the same mod is near impossible also.

The only point I was trying to make is that a good crush bend exhaust can , even in 1 instance, be superior to a stock exhaust. The rest were just performance results from 2 of my cars. These results are not to be compared just facts of performance. I was not trying to compare a ford to a nissan that would be ridiculous! DemonSVT put it out there that he was willing to bet that a 2.5" crush bent system would not increase performance over a stock svt exhaust and he was proved wrong. He posed the challenge of proof and it was met by another member. I look forward to DemonSVT's reply on this subject.

Originally posted by Frankiehotdog:

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DemonSVT wrote,"Actually I'm willing to bet any crush bent system will not outperform the stock SVT exhaust (which is mandrel bent BTW) with the resonator removed or probably even with it just replaced with a quality unit!

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Originally posted by Frankiehotdog:

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Well, Cawong11 showed a dyno test proving him wrong.

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That post only show what a stock SVT exhaust does compared to a crushed bend one. DemonSVT's original post says compare a crushed bend one to a stock SVT exhaust with the resonator removed. Obviously CAWONG11's dyno has the stock resonator inplace. So this does not prove him wrong.

FWIW, I have a 2.5" mandrel bend exhaust on a non-svt and have gotten more torque than most on the board.

Not to cause problems, but if you go back to cawong's dyno post, it states stock resonatorless exhaust vs. crush bent exhaust.

People sometimes only see what they want to see. The dyno test DOES prove DemonSVT wrong.For God sakes, all I wanted to show was that when someone says you did the wrong thing going with a crush bend they might be wrong.

Now I will catch ctamotorsports.com in a slight manipulation of the figures. He choose to pick the least horsepower and torque for the run regarding the SVT exhaust. Notice run #4, 178.28 hp and 160.91 tq. vs. 182.06 hp and 166.59 tq in run #7. Ok, so its still more vs. the resonatorless SVT exhaust. But what about the accurancy? If not on the same day, I question it. Why? Noice the other dyno run.

I am suspect of the claims on the SE. He claims the only change is the exhaust, but before May 29th, he reprogramed his chip, according to his webpage. The result of the reprogrammed chip is found in run #9. Which showed 160.19 p and 157.58 tq. The chip should also be different for run #12. Could it also be possible that a "Unorthodox Racing Ultra Street underdrive pulley. (June 00)" be also installed, according to his chronological website, it would have already been installed before the custom exhaust. Did I also mention that he sells the exhaust he is promoting. Make your own conclusions.

Hmmm, by opening up a second thread, it sounds more like you're trying to rub it in somebody's face.
Again, I will say, larger diameter piping w/ crush bends is good enough for some, and not good enough for others. If you want the absolute max hp from your car, you're going to need mandrel bends. If you just want some more hp, crush bends will do.