tight clearences with acl race bearings - Miata Turbo Forum -Boost cars, acquire cats.

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Old 07-21-2016, 12:04 PM   #1
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Default tight clearences with acl race bearings

Hey guys! I am in the process of building my engine for a boosted daily driver/occasional track car, and I have a question for you. I have the stock crankshaft, and ordered ACL race bearings with stock clearances from fab 9 tuning. I plastigaged all my bearings, and all of them read about .0015mm, with the frontmost bearing reading .001. This worried me about being too tight, but I hear plastigage isn't the most accurate way of going about this. another possibility for the front one being the tightest clearance is because I torqued the caps down front to back, instead of from the middle out like I read was correct later. Does anyone have any insite on If this sounds weird, or if I simply just need to have a machine shop professionally check the clearances? strange that stock crank with said to be stock sized race bearings would be too tight on an engine previously with 120000 miles...

Last edited by foshizzle; 07-21-2016 at 12:06 PM. Reason: bearings,clearances,plastigage,main bearings
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tight clearence

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