Exhaust size...

Green7mgte · 03-27-2010, 06:42 AM

christ. you should be trying to run 500 hp or better with 20psi..
f it. if you got the cash go bigger. if you can find 4" the whole way out.

"note" I did not look at his current specs. I am not saying running 20psi is warranted for his current build. just stating my opinion.

Chi_Town_MK3 · 03-27-2010, 03:56 PM

Quote:

Originally Posted by Green7mgte

christ. you should be trying to run 500 hp or better with 20psi..
f it. if you got the cash go bigger. if you can find 4" the whole way out.

"note" I did not look at his current specs. I am not saying running 20psi is warranted for his current build. just stating my opinion.

I found a 4" dp for like $350 and 4" cat-back for like $900 and for 3" dp was like $260 and 3" cat-back was like $700 so its not much more an it sound better IMO.

my goal is around 500hp-550hp for this summer

Green7mgte · 03-27-2010, 06:13 PM

im sure there might be some minor things that take their tole by using a huge exhaust.. gass milliage or what have you. I THINK the only downfall would be back pressure. but that's for n/a's so nothing for turbo's to worry about.

Chi_Town_MK3 · 03-27-2010, 08:47 PM

Quote:

Originally Posted by Green7mgte

im sure there might be some minor things that take their tole by using a huge exhaust.. gass milliage or what have you. I THINK the only downfall would be back pressure. but that's for n/a's so nothing for turbo's to worry about.

well I been reading up on another Supra forum site 2day and they were saying will lose low-end TQ but will gain top-end HP and can run more boost due to the better flow and Turbos work better with less back pressure, back pressure is only needed for n/a cars

Green7mgte · 03-28-2010, 01:38 AM

Quote:

Originally Posted by Chi_Town_MK3

back pressure is only needed for n/a cars

Quote:

Originally Posted by Green7mgte

the only downfall would be back pressure. but that's for n/a's so nothing for turbo's to worry about.

yea i know.

87mk111 · 03-30-2010, 12:28 PM

The only downside I could think off would be clearance; if you have lowered the car, 4" exhaust might bottom out easily. Just a thought.

907mge · 03-30-2010, 03:31 PM

yeah that sure is true mine is lowered and my 3in cat has a few scrapes on it already

Chi_Town_MK3 · 03-30-2010, 11:08 PM

Quote:

Originally Posted by 907mge

yeah that sure is true mine is lowered and my 3in cat has a few scrapes on it already

the cars sits on stock springs and 17" rims with 245/45/R17 front and 255/45/R17 rear

03-27-2010, 06:42 AM	#1
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	christ. you should be trying to run 500 hp or better with 20psi.. f it. if you got the cash go bigger. if you can find 4" the whole way out. "note" I did not look at his current specs. I am not saying running 20psi is warranted for his current build. just stating my opinion. __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines :

03-27-2010, 06:13 PM	#3
Green7mgte Supra Forum Moderator Join Date: Nov 2009 Location: Green-Ohio Posts: 1,297	im sure there might be some minor things that take their tole by using a huge exhaust.. gass milliage or what have you. I THINK the only downfall would be back pressure. but that's for n/a's so nothing for turbo's to worry about. __________________ 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines :

03-30-2010, 12:28 PM	#6
87mk111 3" Exhaust Join Date: Mar 2009 Location: akron, ohio Posts: 226	The only downside I could think off would be clearance; if you have lowered the car, 4" exhaust might bottom out easily. Just a thought. __________________ 87 N/A 5spd BHG, soon to be gte with r154

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03-30-2010, 03:31 PM	#7
907mge 20psi boost Join Date: Dec 2009 Location: Harrisburg Posts: 759	yeah that sure is true mine is lowered and my 3in cat has a few scrapes on it already