04-14-2015, 06:09 AM
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#11 (permalink)
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A True Z Fanatic
Join Date: Sep 2010
Location: Crooklyn
Posts: 1,011
Drives: 370Z 6psd-sport-pkg
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Quote:
Originally Posted by Dwnshift
2015 we run billet cranks now which were approved... They are a couple lbs heavier than OEM cranks but they are lasting.
We are limited to 8750 on the RPM.
I heavily suggest dry sump or bare min NISMO oil pump.
Also from what we have seen... 1 missed shift..... Can be all it takes.
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yeah dude the reciprocating motion is whats destroying the crankshaft, the cylinders and rods are very heavy and under 8750rpm its just a crazy amount of stress. If u would have upgraded to lighter rods that do actually have an oiling port, u would have been good. I dont know if its allowed in ur competitions, i my self have recently drew titanium rods total weight with bushing and APR 2000 bolts ~450grams, i think with OEM crank u can reach 10k rpm and maybe even more.
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