Had really bad boost spike on my last S2, was a ZVH on MFI and would peak at 14-15 but hold maybe 11psi, was an animal for lighting the wheels even with 8j Comps

One before that ran Omex 500 and held 17psi never peaked over 18, was brilliant even through 2nd with 280lbs of torque. Had a Burton ZVH in there, pretty sure clutch slipped before wheels did lol...

Even perfect boost curve can only fight the chassis so far