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View Full Version : OEM or aftermarket bearings


dreek93sr20
06-16-2014, 11:08 AM
Im building my SR and cant decide on wether to go with clevite/acl or just go back with oem main bearings. Im fully built with rods, pistons, head built, but before I go back together I would like to know are OEM main bearings cool to go back together with. Im looking around the 500hp range also. THANKS IN ADVANCE FOR THE HELP

lucas240sx
06-16-2014, 08:08 PM
Oem should be find
Just make sure you get the right sizes

I went with acl standard size bcuz i had to turn my crank

jr_ss
06-16-2014, 09:05 PM
OEM would be the best option. ACL are all one size, typically there is a variance from one bearing to the next. With ACL bearings, one may be too tight or loose, which can be corrected with a different size. OEM has a wide range of sizes.

Croustibat
06-17-2014, 01:58 AM
OEM all the way. I think there are 4 sizes available for standard and reground. If you are sure the block has never been machined, use the numbers on crank / rods / block to get the right reference. If you are unsure, use plastigauge.

OEMs are tri metal, too.