VTC/knocking issue

dcloo · Post by **dcloo** » Tue Sep 01, 2009 7:12 am

need some help from some expert here
the engine thats tune more VTc increase(max 50VTC) cause lots of knocking but made great WHP power and i din't hear any knocking from out side the car
even i retard the ignition timing its still knocking
its that's a knock sensor faulty?

Post by **Hondata** » Tue Sep 01, 2009 7:37 am

Piston to valve contact?

dcloo · Post by **dcloo** » Tue Sep 01, 2009 10:26 am

has been clay when installing the cam

setup was k24a,stock ITR head.stock valve,wesico 12.5:1 87.5mm piston,BP stage 2 cam,BP pro H beam, ACL race bearing, RBC, 70mm TB

best 35-37 VTC without any knocking but power like shit 242 whp with 50 VTC did 268 WHP tuned on 93 octane