Originally Posted by
skunk2racing97
my guess is either the VTEC timing on the P72 is way off, or its disabled.
if VTEC engages either really low or really high, it wont have as pronounced of an effect.
the P72 (B18C ECU) may also be a little lean for the 2.2 going into VTEC, so less gas = less power = less "hearing/feeling" VTEC...
just a guess tho, im no ECU genius
On a properly tuned vehicle, vtec should be engaging at the best transition point between both cam profiles. (The smoothest point).
A p72 ecu is scaled for 240cc injectors from the factory.
Prelude injector sizes
92-'96 Prelude VTEC Peak and Hold 345cc
97-02 Prelude vtec Saturated 290cc
As you can see a prelude uses larger injectors then 240cc.
Using a stock p72 ecu on a h22 is never a good idea in my opinion. Using a p72 ecu to have your car tuned on is a great idea as it is the only ecu that officially is supported by most tuning systems using intake air butterfly support.