[Triple5even813]

Originally Posted by JB'sZL1

I'm going to add two more things I would not do to my Z (already touched upon): 7,000rpm shift point and 5w30. Unless you go with a 416, you may want to set the shift back, and go oem or 5w20. You're just risking things most of us don't. The fact that you weren't gunning it at time of failure is of no consequence. Revving it to 7k over the past year (or over the past how many number of months) was probably most certainly a contributing factor. Leave the high revs for Voodoo and Predator.

IDK about the 7k limiter thing... I have been thrashing my car at 750whp for 2-1/2 years, no lift shifting at 7k, and my oil pressure is holding steady at 30 psi hot with M1 5W30. Upgraded springs, trunion, retainers. Not overheating the oil. Not lugging the engine with heavy torque loads at low RPM, or getting greedy with timing at peak torque, and a great tune. I think these things have probably made a difference for me. I'm open to hearing your reasons why 7k is too much. I don't understand why a 416 would be any less susceptible to high RPM failures than stock displ.