New Aftermarket Exhausts!!!!

BoBoTee · 02-21-2009, 12:31 PM

Yes backpressure doesn't start from the catback, but the catback is part of the cause to backpressure. It all depends on the car your working with you can add headers,tp, a catback+tune like on a civic and won't see much gain. The statement that you can only see 5-6whp and just for sound on a catback is not true. For example some turbo'd cars see around 15+whp w/o tune. I think the new Z can probably put down more then 5-6whp with a catback+tune.

MightyBobo · 02-21-2009, 02:03 PM

Quote:

Originally Posted by BoBoTee

Yes backpressure doesn't start from the catback, but the catback is part of the cause to backpressure. It all depends on the car your working with you can add headers,tp, a catback+tune like on a civic and won't see much gain. The statement that you can only see 5-6whp and just for sound on a catback is not true. For example some turbo'd cars see around 15+whp w/o tune. I think the new Z can probably put down more then 5-6whp with a catback+tune.

Sigh, maybe I should have been more specific.

Im not talking ANY car here, Im talking the 370Z, which is a non-turbocharged vehicle. Backpressure isnt nearly as much of an issue. Hence why, a simple catback and NOTHING else, will make very little difference.

I'm fairly sure there's already some dyno graphs showing very small horsepower changes on full exhaust setups WITH test pipes and no tune. Like, 8-10 WHP. Ditch the test pipes, I bet that will drop even more of course.

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02-21-2009, 12:31 PM	#1 (permalink)
BoBoTee Base Member Join Date: Jan 2009 Location: Maryland Posts: 56 Drives: 09 Honda coupe v6 Rep Power: 248	Yes backpressure doesn't start from the catback, but the catback is part of the cause to backpressure. It all depends on the car your working with you can add headers,tp, a catback+tune like on a civic and won't see much gain. The statement that you can only see 5-6whp and just for sound on a catback is not true. For example some turbo'd cars see around 15+whp w/o tune. I think the new Z can probably put down more then 5-6whp with a catback+tune.