Quote:
Originally Posted by Vegas69
I'd look at the engine vitals first in regards to the vibration. All 8 firing, fuel pressure, engine tune, etc...
My stock LS2 makes 28-30 psi at idle hot. What weight oil are you running? Mast may loosen up their clearances and that could require heavier oil to get a pressure that makes you feel fuzzy. 50-60 psi at redline should suffice, hot.
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re: oil pressure Mast did confirm my readings sounded a bit low. I would generally agree 50-60 at redline is good. I'm not running the motor at redline yet but 4K it was right at 40 which is far lower than any of the LS equipped vehicles I've driven and I'm used to motors reaching peak oil pressure or at least high oil pressure far before redline. It currently has the Mast recommended 10-30 Valvoline racing oil in it with EOS additive. I'm probably going to drop the pan and check the o-ring no matter what.
I haven't touched the tune since it's tuned at Mast and they do dyno the motors before shipping. I used to check for all cylinders firing by pulling a plug wire one at a time with the engine running. What is the non cave man way to do it lol?
Currently don't have a way to check fuel pressure but will look into that. I have a hard time seeing fuel pressure doing vibration while the motor otherwise pulls fine and drives fine.
I will add the motor pulls plenty hard with the limited drive I did. Even part throttle mild driving up to 3K RPM's shows this motor is far more powerful than my old zz4 350.
I get more vibration through the steering wheel (no more rag joint, uses u joints) than I get riding through the handle bars riding my 88TCB Harley. My side view mirrors shake like a Harley too...