test pipe

samk · Jul 27th, 2003, 11:23 AM

has anybody had any experience with removing their cat and putting a test pipe in or know anything about it?

**Asleep** · Jul 27th, 2003, 01:58 PM

thats actually pretty damn common. i dont know about your guys's sentras, but an altima will throw a code with a test pipe in. it also makes the exhaust noticeably louder.

samk · Jul 27th, 2003, 03:37 PM

how much of an increase in power do you guys get? i heard it's more of an increase with turbo cars.

**Asleep** · Jul 28th, 2003, 03:10 PM

i dont think we get all that much gain from it to tell you the truth. our cat is pretty flowthru already. ive got nitrous and a header so id probably benefit from it more than someone without. some people swear it adds power, but i think its the increase in noise fooling them.

samk · Jul 28th, 2003, 07:10 PM

haha alright thanks.

zeno · Jul 28th, 2003, 09:13 PM

You will get 1-2hp tops. Save some trees and stay legal.

EDIT: I just noticed you are turbo, I'm not sure of the exact numbers. This info. is accurate for NA.

samk · Jul 28th, 2003, 09:22 PM

Quote:

Originally posted by zeno
You will get 1-2hp tops. Save some trees and stay legal.

EDIT: I just noticed you are turbo, I'm not sure of the exact numbers. This info. is accurate for NA.

yes i am...thats why i posted this is the FI section. i heard increase is higher with FI cars...especially turbo.

javierb14 · Aug 9th, 2003, 04:05 AM

ive never run a test pipe in place of the cat....just open downpipes...and they make a big difference

samk · Aug 9th, 2003, 05:42 AM

Quote:

Originally posted by javierb14
ive never run a test pipe in place of the cat....just open downpipes...and they make a big difference

how so?...wouldn't that just make the resonator and exhaust useless?

javierb14 · Aug 9th, 2003, 12:18 PM

yes....it much much renders the exhaust system useless. basically u dump everything out of the turbine straight to atmoshpere = very little backpressure

i dont recommend this for everyday driving though! for these reasons:
-it stinks
-its loud
-its gets annoying after a while
-its illegal in most states

here's a pic of my friends car with a very short open dp

samk · Aug 9th, 2003, 01:39 PM

**Asleep** · Aug 9th, 2003, 02:12 PM

haha, nice. reminds me of my truck with the 5 1/4 inch sidepipes with no cats...

javierb14 · Aug 9th, 2003, 09:54 PM

lol...

javierb14 · Aug 9th, 2003, 10:55 PM

another option....check out this thread
http://www.nissanforums.com/showthre...threadid=30975