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11-25-2011
should i do a 3" exhaust???
boost is at 6PSI at WOT
has 260hp/255tq
stage 1 intense blower cam
headers
FWI
lites 104s
180 Tstat
3.4 pulley
2 1/2 exhaust
tuned for the 3.4
i dropped to a 3.2 and got 3* KR so i took it off
i plan on doing some valvetrain work and need exhaust work since with headers everything is hitting everywhere...
would i get any benefits from a 3" exhaust????
11-26-2011
I think it might lower KR but also lower torque.
11-26-2011
Should i do it?
11-26-2011
Probably won't do much, what headers you got? If you don't need a cat, then remove it, or get a hi-flow one. 6 PSI seems low though, isn't stock pulley at WOT like 7?
11-26-2011
I just noticed this is a Lumina, is the exhaust the same dual and everything as the GP? If not, then I would go 3".
11-26-2011
nah your stock catback flows fine till 350 hp
To me it sounds more a tune problem than anything. You need a good custom tune to gain everything out of the cam you have.
11-26-2011
The lumina exhaust has like 5 90 degree tubing its never comparable with the gtp exhausy! i know tune is so so but i still need to.make a new exhaust. This is why im asking if it helps to have 3" exhaust
11-26-2011
Stock size is 2.5 give or take and at the bends around 2, and with how much power you are putting down its not an issue at this point.
you''d just be spending on something you dont need to have.
11-26-2011
*sigh*Originally Posted by Hippo Machine
Hippo, stick to leaves.
Pics would probably help of your current exhaust setup. 3" probably isn't going to do anything to really help...
A cammed car on a wideband with headers should have no problem running lower than a 3.4"...sounds like a solid tuning issue like Cam said.
11-26-2011
Five, its not the same with the gtp than with a lumina. It is very diferent but still...i have to do a new exhaust because mine's crap!
11-26-2011
So ill just redo the 2 1/2 exhaust???
11-26-2011
Post.
Pictures.
Of it.
Also.
No, get a re-tune guy...
11-26-2011
Lumina right? like a 95-00 body? if so its exhaust is 2 1/4 not 2.5...
11-26-2011
Forget about tuning it for a while, i need a new exhaust! Thats it! Mines crap! All bend up, welded everywhere and has areas where is hitting my car.
Would i lose?
Would i gain?
Or i should just redo the 2 1/2?
Im not trying to get rid of kr by doing the exhaust
I just need a new exhaust and since its the same price thats why i ask!
11-26-2011
Phoenix thats correct!
11-26-2011
Someone???
11-26-2011
You will not lose anything since you have to replace it anyways. Probably gain some. Yay!
11-26-2011
pride for hippo can either be won or lost on this playing field
anyways pics of the exhaust?
Originally Posted by TLSheff
11-26-2011
That doesn't look bad at all.
Thats a little worse, but granted you go mandrel its probably more than adequate.
11-27-2011
Im gonna do it mandrel then! where can i find some mandrel??? Ill probably move the muffler to the drivers side! To see if I can eliminate the last corner
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