Question with fine tuning bearing selection

Old 01-24-2019, 02:18 PM
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Question with fine tuning bearing selection

Not sure where to post this. I came across a complete selection of S2k bearings mains and rod sizes.

Main Bearing thickness by color:

Blue 2.013-2.010 mm 0.0793”- 0.0791”
Black 2.010-2.007 mm 0.0791”- 0.0790”
Brown 2.007-2.004 mm 0.0790”- 0.0789”
Green 2.004-2.001 mm 0.0789”- 0.0788”
Yellow 2.001-1.998 mm 0.0788”- 0.0787”
Pink 1.998-1.995 mm 0.0787”- 0.0785”
Red 1.995-1.992 mm 0.0785”- 0.0783”

Rod bearing thickness by color:

Blue 1.510-1.507 mm 0.0594”- 0.0593”
Black 1.507-1.504 mm 0.0593”- 0.0592”
Brown 1.504-1.501 mm 0.0592”- 0.0591”
Green 1.501-1.498 mm 0.0591”- 0.0590”
Yellow 1.498-1.495 mm 0.0590”- 0.0589”
Pink 1.495-1.492 mm 0.0589”- 0.0587”
Red 1.492-1.489 mm 0.0587”- 0.0586”

I have mics. Etc. The problem is I have a S2k 2.2 crank in the place of the 2.0 crank. It jas been touched up and renitrided just for safety by Shaftech. So it's been polished minimally and balanced. So the codes aren't exact now. I've seen everyone saying stay away from ACL bearings so I plan to. I feel like this is simpler than I'm making it and you've probably discussed it a million times. I just want to select the right bearings.

I'm a stickler for perfection so I'd rather do this part myself.

I may just not be thinking straight but these sizes don't take into account atleast one fixed parameter. The size of the block's main journal bore diameter or the size of the cranks main journal diameter. The same with the crank's rod journal and the rod's bore size.
I guess the biggest question is does anyone know the sizes that corrispond to the letters and numbers then I could easily choose the right color bearings.
The block letters are CCCCD.
Its the cranks that I have to measure. I will be having this bored just enough to clean up but didn't want to sleeve. I haven't ordered my rods and pistons but I do know pistons and rings have to be for the FRM sleeve. I know Kings Motorsports has the correct ones. I have built many engines including Toyota and Honda but was able to just use codes. The others all old school chevy , olds, Pontiac. Plastigauge last step. Which I plan to do again at the end.
thanks gentlemen.
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Old 05-03-2019, 10:35 AM
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Join Date: Nov 2014
Location: The Pacific Wonderland
Posts: 59
If the block or rods have been honed they may not be the size you think they are. Same with the crank grind and nitride. The task at hand here is to measure the bore and pin then select the bearing thickness to fill the gap leaving the correct clearance. Perfection is required at 9000+ rpm. This job is really satisfying. Have fun.
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