gains from 3" exhaust on F22/H22

[98vtec]

if you understand the PURPOSE of an exhaust and theory behind how it works, you would know that its not going to hurt power to go bigger.

bigger on the header primaries? yes that can severely hurt the power if the sizing and length is wrong.

the most important part of an "exhaust" is the 12-24" after the collector choke (other than the obvious dimensions of the primaries, secondaries, collector, choke)

[jdm92_accorn]

exactly, i mean look at the gain most of our cars get from dump pipes. besides ask bisi what he thinks you should run and he'll tell you 3" on f22's and h22's alike. he saysnes the larger displacement 4cylinder engines need that kind of breathing room. i mean look at the k20 it is a 2.0 liter and it see's gains. well when i get my stuff together i guess im going to have to do a before and after dyno untuned and tuned to finally end this thing for the f22/h22 guys on cb7tuner.

[gloryaccordy]

Do it man, we're all rooting for you

[jdm92_accorn]

ok so im going to try an experiment. im going to run my car on the dyno with my 2.5" exhaust on for 3 runs then open header 3 runs and if there is gains above 2.5k im going with the 3" if it loses a great deal of power im stickin with the 2.5".