yo i got a crx with a ZC motor and its slower now than when it was stock... ain't much was done to it. jus a port and polished head, cam gears, lightened fly wheel, and clutch... that's about it and its slower now than when it was stock... can't figure out the problem... i don't think the fly wheel has anything to do with it but it might... its not much lighter than stock flywheel... can't figure it out... maybe something with the fuel i jus don't know

 

check the timing

 

limp mode?

 

Porting a head can actually hurt perfomance if it is not done correctly.

 

take the motor out and go b series

 

VERY true who port and polished ur head? did they have a good reputation? if thier off by a little bit the air well flow completely different and well cause loss of power

 

yeah i was thinking the same thing Scott said. also like sung advance your timing a little and see whats up..you have a timing gun?

 

What ecu are you running and timing, plugs compresstion. check it all out.