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-   -   tight clearences with acl race bearings (https://www.miataturbo.net/engine-performance-56/tight-clearences-acl-race-bearings-89846/)

foshizzle 07-21-2016 12:04 PM

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...


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