I have been looking at others people post about lack of power when hitting vtec but for some reason I have yet to find my problem. Here is what happens.
I accell with boost climbing to 5 lbs (set to 7lb cut) once I get to 5200 or so right were I set vtec cross. I get this nasty crasping from the engine ( which almost sounds like the waste gate) and power is reduced and boost stops building. Lambda is at this point .82-.85. Timing is reduced through boost control 1 degree per 1 lb of boost. Boost control is set on the s300 with the valve I received from the hondata dealer. Tial waste gate spring is the 5.5 psi and I have Tial 50mm blow off valve. Turbo is a T60-1 with a A/R of .82
Granted I have yet to get the car tuned , I have done the tuning myself. I did the tuning with the AEM wideband. At the moment I have the stock O2 running closed loop but the wide band is still installed monitoring lambda (3 O2 sensors). I tuned the car on the road while someone drove for me. The car runs great til that cross point. I have both vtec boxes checked. Is there someone that has had this issue.
Tuning problem p28 s300
Tuning problem p28 s300
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