LS1SS4ever

A shop told some one in this forum that adding CME tipe will cause a drop of approx. 5-10 HP on the dyno....how true is that? he said that its like adding a second y pipe

n2oblkz

iTrader: (1)

I don't believe that in the least bit. Look at the C5 exhaust, it has just as many bends as the CME exhaust does. It is the same diameter as the tailpipes and it has no other restrictions other than the added bends so I don't believe it. I wouldn't care if it would, I'm still planning on adding it to my exhaust, it just looks too good. They would have to show me on the dyno!

5POINT7

A drop in hp seems reasonable. I mean, think about it, airflow has gotta slow down with a bend like that. Think about how much water slows down at sharp bends. I wouldn't doubt a decr. in hp, but I think it will be neglible...don't worry about it. Or just add a cutout to the I pipe to negate the drop in hp.

Ryan02SS

iTrader: (3)

I have firsthand info on this subject. I have replaced my factory Dual Dual muffler with a Corsa muffler and retained the 2.5" piping and CME tips and valance. I also have a 3" QTEC in the I pipe before it bends over the axle. During my last tuning runs at Rapid I did a closed vs open cutout comparison. My 3" cutout only gained me 4rwhp @ 5rwtq over the Corsa muffler and CME tips. These gains were only from 3500rpms and up. Anything below 3500rpms the lines were identical. FYI

n2oblkz

iTrader: (1)

I kind of agree but when you think about a couple extra 90's on each side that are mandrel bends, I can't imagine that it would be enough to measure.

777

iTrader: (21)

there is no way that will cost you 5-10 hp...maybe 1-2 but that difference is so small...your car could change that much with the temperature of the engine...or the air...10 degrees cooler air and you will make more hp than what you "lose" from your cme...

Poltergeist

I have the GMMG, CME tips with a 3" McCord in the I-pipe just before the axle. Same idea as Ryan02SS'. I only gain about 5hp (don't remember the tq) when I open my cutout. If there is any restriction in the CME it can't be measured.

'02SS

iTrader: (1)

what is a CME? is it the tips that exit in the center?the quad pipes?

SCamaroS

It's the center mounted exhaust. It came on the 2002s and the pipes meet in the middle. I think it looks pretty smooth but the GMMG tips look better IMO.

2_wacko

iTrader: (2)

I think the looks of the CME will be worth it.

Gloveperson

iTrader: (9)

the shop was not correct. You may lose it over a cut-out..but not over a stock muffler.

Grimes

iTrader: (3)

Center Mounted Exhuast?

LS1SS4ever

So there is a small difference that don't make me to buy CME

777

iTrader: (21)

the difference is negligible or however you spell it... don't worry about it do what you want

WS6FirebirdTA00

iTrader: (33)

just dont get the quad tips, ive seen some in person and they look even worse than they do on here (well at least the cars that i saw it on)

LS1LT1

iTrader: (16)

Yes, but that still doesn't show what the actual tips did to the dyno numbers with the cut out capped. To get that you'd have to have compared the normal stock (or D/D or other aftermarket) tips to the CME set up, a cut out will obviously free up some power from either tip set up but the question here is just how much power (if any at all) does the CME rob over other tips.



It's all personal preference of course but I happen to agree with yours on this one.

WS6FirebirdTA00

iTrader: (33)

yeah i dont like the look of the quad at all but mainly what i was refering to is the quality of it. they didnt line up well at all

5POINT7

This would be an interesting side by side dyno comparison. I'm willing to bet a loss in peak hp with similar tq numbers after swapping on CME. Just use your heads guys, more bends equal more decreases in airflow which equal less power.

I don't understand why there is a question on this. A difference in power is a difference in power, no matter how minute or insignificant.

LS1SS4ever

How much CME tip with rear kit cost?

WS6FirebirdTA00

iTrader: (33)

go to slp and check