Fit Exhaust SystemsThreads discussing exhaust related topics including headers, cats/test pipes, b-pipes, and cat-back & axle-back systems for the Honda Fit
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Backpressure will kill HP/Torque!! What you need is the BIGGEST pipe that will let the exhaust FLOW enough at HIGH RPM's without being a RESTRICTION, yet, being SMALL enough so that it still have GOOD exhaust gases VELOCITY!! 60mm will be too much for a 1.5l Fit that revs at 7K RPM!
-Too BIG = Flow at High RPM's but low Exhaust gases Velocity at low RPM's = Less scavenging effect = Loss of Low End Torque!
-Too Small = High exhaust velocity at Low RPM's = Good Low End Torque but Little flow at Upper Revs = Loss of Top End power!!
Personately, 50mm pipe with 1 or 2 good quality perforated core Resonators (Maybe 3 if you delete the Cat!), a good straight thru Muffler and a Header with a Merged collector! Forget about the Louvered cores resonators and mufflers that adds turbulence and restriction to the exhaust stream...
The MINI Cooper S engine was actually designed by the same team responsible for the Neon SRT-4. It would seem this team is as competent as they are modest. Though only rated at 163 hp at the crank, our MINI cranks out 166 hp at the wheels.
I think i have to put back my CAT. I felt no power during 800 RPM to 2500 RPM. at high speed, I feel nothing change.
Normally i don't race and mostly travel to work only.
So , conclusion, remove CAT is not the way for city drive.
it will slow u down ALOT ALOT ALOT.......
The MINI Cooper S engine was actually designed by the same team responsible for the Neon SRT-4. It would seem this team is as competent as they are modest. Though only rated at 163 hp at the crank, our MINI cranks out 166 hp at the wheels.
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