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Old 05-16-2009, 03:49 PM   #299
Scooby Specialist
Member#: 85036
Join Date: Apr 2005
Chapter/Region: MWSOC
2013 PBP sti ltd
05 LGT 35r 30psi..busted


been meaning to post this, just kept forgetting. I know these are two different platforms but evo's cranks are crossdrilled, with the oil throw at the center of the main just like the subaru crank shaft. Here are some differences between the cranks. The evo ROD bearings are wider than our widest MAIN bearings. Each main feeds one rod. Obviously the geometries are a bit different considering that have almost a square engine (85mm bore x 88mm stroke) They also have a rod to stroke ratio 1.70 (150mm rod x 88mm stroke).

Not making any bold statements just throwing out some food for thought.(still does not change my plan to convert my extra 2.5L crank to a straight shot oiling)

Both of my buddies evo engines that we have built use stock bearing clearances with Clevites in one and ACL in the other. The cranks are NOT modified other than being polished by the machine shop. Stock oil pump and and oil coolers. They both rev to 8-83000 DAILY, and 9000 at the track. and yes they have turbos to utilize the extra RPM usage.

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