Passed emissions with the new exaust
05-15-2002, 05:15 PM
#1
Super Moderator
Thread Starter
Join Date: Feb 2002
Location: Amityville, New York
Posts: 12,288
well, happily the car passed on its own, with flying colors. So I got the best of everything, no more rusty pre-silencer, no more disgusting fumes, and the tone is deeper. The scan didnt come up they way I wanted it,so Ill tell you the results : HC LIMIT: 2.00, tested: 0.95, CO limit: 30.0, tested 15.4, NOx limit: 4.00, tested 0.25. And there was no decrease in performance!
05-16-2002, 01:24 AM
#3
Senior Member
Join Date: Aug 2001
Location: Lynnwood, WA
Posts: 3,097
That is good that you passed.
I wouldn't go with 3" unless you are planning on making gobbs of power. You want the exhaust pulse to flow at high velocity, causing low pressure behind the pulse. This causes almost a vacuum that sucks the next exhaust pulse out of the rotor housing/cylinder.
I wouldn't go with 3" unless you are planning on making gobbs of power. You want the exhaust pulse to flow at high velocity, causing low pressure behind the pulse. This causes almost a vacuum that sucks the next exhaust pulse out of the rotor housing/cylinder.
05-16-2002, 05:27 PM
#8
Senior Member
Join Date: Nov 2001
Location: Bay Area, CA
Posts: 7,316
Originally Posted by vosko' date='May 16 2002, 10:20 AM
my gtu with bonez cat passed with flying colors. probably helped that i had a giant vacuum leak :P
05-16-2002, 06:36 PM
#9
Senior Member
Join Date: Mar 2002
Location: KAOH
Posts: 597
yeah a 3 inch exhaust is to much for a non turbo, if you had a turbo and were running more than 10 lbs. of boost then you would want a 3 inch exhaust, i used to have a 94 mitsubishi eclips GSX,it was the **** until i was stolen and wrapped around a tree, i had a 3 inch exhaust, bov, turbo timer, and a couple other nice,(NICE) goodies under the hood. only a turbo needs a 3 inch exhaust.ill shut up now i can talk about cars forever,piece!
waste ricers,all of them
waste ricers,all of them
05-16-2002, 07:59 PM
#10
Senior Member
Join Date: Apr 2002
Posts: 233
I want to put 3" piping only for downpipe to the high flow cat because I'm planning to go for a street port on my next project while rebuilding the engine. I thought free flowing the exhaust right now wouldn't hurt anyway. Why would it be a problem to suck the exhaust out, technically speaking? Would it be because with peripheral exhaust, the intake mixture could be suck in the meantime?