Mu lude detonates when vtec i have it built for turbo and have a t3/t4 it boots good and has alot of power but as soon as it hits vtec it sounds like its detonating. I have msd ignition, 450 injectors and controlling it with vafc

 

tune the motor. problem solved.

are you running at least an fmu and inline fuel pump? or are you trying to do the afc-hack?

 

yah definetly tune that... have you retard the ignition correctly or have you advanced your cam timing?