if your running mods with no map it can reduce the bhp due to the ecu not knowing about the mods if you see what i mean.What's your full spec list? Even if anything wasn't mapped in your talking over 230BHP so somethings not right somewhere :shrug:
Doesn't necessarily cause bore wash. Z20let ECU's are self adjusting and will adjust the fueling itself after driving it a few times. A lot of people run VXR injectors and MAF without a remap. I personally wouldn't do it but everyone has there own opinions.If he's running a vxr afm and/or vxr injectors with a standard map he will be killing his engine pretty quickly
please dont bump old threadsPeple seem to forget thT THE 2 ENGINES Z20LET AND 20LEH ARE IDENTICAL MORE OR LESS besides a few extras forged pistons under oil cooling on the LEH. Fitting a VXR turbo on a standard LET with induction kit and performance exhaust will improve BHP as its boosts better. Should be looking at 225bhp at least id say and it will raise torque.Reason why that kid with Corsa only showed 201bhp is a tired engine. Vaccum leak, coil pack could be anything. Should be alot higher that standard 201.I would tKE THE CAR FOR A GOOD RUN 100 MILES or so then dyno it again if its still 201 theres something wrong.