Blown VVEL !!!

Shamu

It was posted a couple times here last year. The stock oil pump literally shatters from harmonics above 7500 RPM. The metal is of inferior quality and isnt designed to rev that high. So essentially you have a ticking timebomb if you defeat rev limiter. I wouldnt trust stock bottom end much beyond 7500 either.

Again this is why I went with lower rving forced induction. I also try to shift below 7500 RPM redline to save motor as well.

You have several things working against you with VQ37.

1. Poor stock oil pickup for track running - major oiling issues in high g turns
2. VQ37 heads with VVEL run very hot especially at higher RPMs. Hot heads not good. Especially when you run RPMs beyond design spec. Thats why all Grand Am teams went to HR heads.
3. Oil pumps arent made to handle high RPM's

I was at track testing sessions with high RPM VQ block and HR head race car. Even with best cooling systems they had issues keeping these motors cool with stock oiling system. You cant just turn up RPMs without way to keep the motor oiled at those RPMs.

The only real fix in my opinion if you intend to make a high reving track motor is to put a dry sump on it.

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Grant