03-05-2014, 10:02 PM
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#14 (permalink)
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Track Member
Join Date: Jan 2011
Location: los angeles
Age: 40
Posts: 933
Drives: 370z, EK Civic, F150
Rep Power: 17
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Quote:
Originally Posted by Shamu
I would like to challenge any of you who have done over 10 track events to tear down your motors and show us your rod bearings. Talking to those who build VQ race motors it's known that lead content in bearings starts to break down with oil temps above 240. We also know stock oil pan allows oil starve when cars are generating high Gs at high RPMs.
I was very easy on my motor no track events over stock redline and only ran a couple autocrosses with 8000 rpm redline and my rod bearings were shot. That's with a aM performance pan and big oil cooler. My motor felt great too but feeling great and causing real damage to rod bearings aren't too far apart.
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im sure my rod bearings are not in the best shape, from both tracking and the fact i have 65k miles, but i do what i can to keep things under 240. Its actually that our bearings have NO lead content since nissan stopped doing that since like 2000, the lead content helped for a more ridig bearing, the bearings we have NOW are more so soft and get even softer at 250+, my close friends (one of which is a mechanical engineer and has alot of Nissan race experience, and my other friend builds Nissan race engines) both tell me do what i can to stay under 250 oil temp. So yeah, im sure things arent all rainbows and cheese inside my motor, i think ill prolly have a rebuild done after this year, just check everything out and fresh/better engine bearings
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