Quote:
Originally Posted by PoorMans180SX
Factory tolerance for rod bearings is too tight for an engine that sees abuse. I'd open up the rods to .002" and run a solid 5w40 or 5w50 if I were you. This is the #1 reason that most Nissan engines eat rod bearings at the track.
Also double check the big end dimensions of those eagles, they're notorious for being inconsistent/out of round and needing a resize.
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That's good to know. I was running 15w-50 Mobil 1, might switch back to 15w-40 Rotella that I've run for the past 5 years. I've switched back to a new/used long block(compression is good and timing kit/oil pump are getting replaced). My tune was done on a stock motor, I just had a garbage cooling system at the time and ended up driving an event on a blow headgasket and when the motor hit 380F it took the rings with it. This old motor is going to sit for a while and when the time comes I will be taking the entire rotating assembly to a machinist to have them completely go over it. I'll definitely open those tolerances up as well.
For reference, I'm only running ~11psi on a 2871 which yielded 290whp and I lowered the rev limiter down to 6850