How much hp do high flow cats add to the vortech kit?
10-15-2007, 08:50 PM
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How much hp do high flow cats add to the vortech kit?
I tried searching but I was wondering if anyone has done before and after dyno tests with stock exhaust and then high flows...
10-15-2007, 09:58 PM
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Your best bet is to save up and get majority of the mods u want bc no one is crazy enough to buy 1 part at a time and waste their money on a tune for each upgrade. This isnt NA anymore where u can just buy 1 part at a time and expect not to go lean and BOOM 
.
Cats arent going to give u much pw if u dont change out your whole exhaust.
.Cats arent going to give u much pw if u dont change out your whole exhaust.
10-16-2007, 04:36 AM
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Originally Posted by Audible Mayhem
we have a few times, really didnt make any difference with high flow cats and test pipes. same hp range, little more or less boost depending on which ones.
10-16-2007, 09:12 AM
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http://www.sccoa.com/articles/cwexhaust.php
Around 5 psi in front of main cats at redline is a good number. Each psi [measured after manifold before cat] of back pressure is roughly equal to 2 HP left on the table.
Very very very loud designs maybe ~~ 4-5 psi. OEM cat typically have a 2-3 psi backpressure and the exhaust system adds 2-3 psi
http://www.tomorrowstechnician.com/tt/tt020526.htm
Around 5 psi in front of main cats at redline is a good number. Each psi [measured after manifold before cat] of back pressure is roughly equal to 2 HP left on the table.
Very very very loud designs maybe ~~ 4-5 psi. OEM cat typically have a 2-3 psi backpressure and the exhaust system adds 2-3 psi
http://www.tomorrowstechnician.com/tt/tt020526.htm
Last edited by Q45tech; 10-16-2007 at 09:19 AM.
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