exhaust question

Jeff_5_7 · 06-26-2007, 11:30 AM

will my 88 n/a supra not run as good with no back pressure o nthe exhaust bucasue right noiw i have a header and a cleanedo out cat the goes to a muffler on the end would it be better to have a littel beack pressure or does it matter

88Tsupra · 06-26-2007, 07:50 PM

you know what i perfer having practically no back pressure cuz back pressure can cause lost of power im about to get rid of my 3inch exhuast for an apexi GT series that runs 3.7inch with a i think 4.5 inch opening

yota_head · 06-26-2007, 10:04 PM

you will lose low end and maybe gain top end.

your engine needs a little bit of backpressure for scavenging purposes.

SupraDupra · 06-27-2007, 02:43 AM

Quote:

Originally Posted by yota_head

you will lose low end and maybe gain top end.

your engine needs a little bit of backpressure for scavenging purposes.

Indeed. From what I have come up with on the N/A's ,a 2 1/2" exhaust is the most you want. Or some have said ,if you know someone with a turbo upgrading ,get that off them and swap it on. I don't imagine your cleaned out cat would have a negative effect with the other elements in place. Unless you took off the resonator and have a more free flowing muffler on there.

06-26-2007, 11:30 AM	#1
Jeff_5_7 3" Exhaust Join Date: Sep 2006 Location: Texas Posts: 109	exhaust question will my 88 n/a supra not run as good with no back pressure o nthe exhaust bucasue right noiw i have a header and a cleanedo out cat the goes to a muffler on the end would it be better to have a littel beack pressure or does it matter __________________ Supras anrt ricers there Japanese Muscle 1988 supra n/a just finsihed 5 speed swap goal is 400hp with a turbo motor swap

06-26-2007, 07:50 PM	#2
88Tsupra 12psi boost Join Date: Jan 2007 Location: long beach, CA Posts: 252	you know what i perfer having practically no back pressure cuz back pressure can cause lost of power im about to get rid of my 3inch exhuast for an apexi GT series that runs 3.7inch with a i think 4.5 inch opening __________________ 88turbo targa-white original Pin Stripe custom intake-Tenzo filter.....Momo racing seats and steering wheel... apexi exhaust tip-custom 3" piping. Replaced with RSR GT II NGK plug and wires HID conversion head lights HKS Turbo Timer Type-1 (in black) Tial BOV BIC DDP

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Question about exhaust	RawrXTC	MKIII Supra	4	02-09-2009 11:04 PM
Exhaust improvement question	finaltable	MKIII Supra	7	06-26-2007 01:09 AM
exhaust question (not in exhaust faq)	sd88supra	MKIII Supra	21	11-28-2006 10:52 PM
Exhaust Question	Dejvid1785	MKIII Supra	1	07-18-2006 01:27 AM
got an exhaust question	supradaddy0803	MKIII Supra	1	06-26-2006 02:11 AM

06-26-2007, 10:04 PM	#3
yota_head Stock Join Date: Feb 2007 Location: BC Posts: 12	you will lose low end and maybe gain top end. your engine needs a little bit of backpressure for scavenging purposes.