Thread: High flow cats
View Single Post
Old 03-23-2011, 05:24 PM   #11 (permalink)
christian370z
A True Z Fanatic
 
christian370z's Avatar
 
Join Date: Jul 2010
Location: Newport Beach
Posts: 3,900
Drives: 2010 370Z/Saab 900se
Rep Power: 432
christian370z has a reputation beyond reputechristian370z has a reputation beyond reputechristian370z has a reputation beyond reputechristian370z has a reputation beyond reputechristian370z has a reputation beyond reputechristian370z has a reputation beyond reputechristian370z has a reputation beyond reputechristian370z has a reputation beyond reputechristian370z has a reputation beyond reputechristian370z has a reputation beyond reputechristian370z has a reputation beyond repute
Default

Quote:
Originally Posted by bigdog1250 View Post
I know Cats are the main restriction in the exhaust, that is why I don't think High-flow cats help too much. Its the removal of cats that makes power. Saying "high-flow" cat to me is like saying "fast snail"... I think its has more of a placebo affect on power.
Sure, I guess you can convince yourself it is a placebo effect. The gains with HFCs are proven and while they may not make as much power as test pipes (duh), at least they don't smell, decrease rasp, have a hope of passing emissions, and are one of the best legal power adders. The most I have seen anyone gain here using test pipes over HFCs is 4-6rwhp. If your car puts down say 300whp, that is not an appreciable difference. You also lose torque with test pipes vs. HFCs.


High flow cats have a much less dense cell count, as well as a smaller catalyst which is why it is significantly less restrictive than the OEM cats. I think this picture makes the difference quite obvious:


__________________
-320whp / 259wftlbs-
SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob
christian370z is offline   Reply With Quote