high flow cat

Post by **Emperor_Tha** » Wed Oct 17, 2007 5:17 pm

is there a big difference in hp compared to a no cat. saying about pushing 15-20psi. maybe 300-350whp max.

Post by **redtop91** » Wed Oct 17, 2007 5:19 pm

When you say no cat do you mean test pipe or open DP?

Post by **CMG** » Wed Oct 17, 2007 7:55 pm

Emperor_Tha wrote:is there a big difference in hp compared to a no cat. saying about pushing 15-20psi. maybe 300-350whp max.

. I would say it depends on the cat and the test pipe. I've switched back and forth on two turbo cars and it does seem to make a small difference to my butt dyno. I don't know how though as they are both 3 inch, maybe there is something in the cat that causes a small restriction. Cats are only good for smogging a car and keeping the fumes down so you don't pass out.

Post by **Emperor_Tha** » Thu Oct 18, 2007 1:11 am

test pipe

Post by **plainzwalker** » Thu Oct 18, 2007 4:20 am

I've noticed zero difference between a test pipe and a hi-flow cat with both being ~3". If you did lose HP it would be minimal.

Post by **Emperor_Tha** » Thu Oct 18, 2007 2:03 pm

ok thank you for the infomation.

Post by **Emperor_Tha** » Sat Oct 20, 2007 1:38 am

is there any difference in exhaust tone. just slightly lower in sound?

high flow cat

high flow cat

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