Exhaust Q?

  • Thread starter Thread starter 89lxbill
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89lxbill

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I noticed that you removed the factory h-pipe and installed an x-pipe and different cat-back. Was this just for the sound or did it show an improvement in performance. I have been told that even on a supercharged Marauder that exhaust was a dead end as far as gaining horsepower. I find that hard to believe after looking closely at the factory system.
 
We are finding about a 30 horsepower gain between adding the x pipe and the Random Technologies' high flow cats as well as the Borla high flow mufflers (we do use the stock tips). It's 2 1/2" all of the way back and welded together.

Let me know of any other questions.
 
supe said:
We are finding about a 30 horsepower gain between adding the x pipe and the Random Technologies' high flow cats as well as the Borla high flow mufflers (we do use the stock tips). It's 2 1/2" all of the way back and welded together.
Click to expand...

WOW! That's fantastic and goes against most reports here. Do you by any chance have before/after Dyno sheets showing the improvement from this specific mod?

Thanks,
 
TAF,

What I have is dyno sheets on the car that we did with both the stroker and exhaust (311 at the wheels) and I based the 30 horsepower difference between that of ours and that of MAD3R's dyno after we stroked his engine (last I knew it was about 275 rwhp). I have not had anyone who wanted only the exhaust so I do not have info on that of a stock engine.

If you have any more questions let me know, if you want a copy of our dyno sheet with the stroker and exhaust, email me and I will send it back attached.

Thanks
 
IT a cumulative thing. Stroker pushes more air, so the stock exhaust, though fine for a stock motor, would now start being restrictive.

Would this be a acurate discription?
 
Yes, I believe it would be. But, with that same logic, someone who is doing a Supercharger may want to look into it as well.
 
I was just happy to have the better half agree to the engine rebuild. I didn't want to push my luck.

Headers and exhaust are on my Birthday/Christmas list.
 
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