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Old 10-19-2019, 02:24 PM   #16
gnx7
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Default Re: What bearing for stock crank LS 1000hp

Calico coated bearings, stock LS3 style crank, Compstar rods spinning to 7000-7800rpm doing lots of street pulls, LS9 block, about 60-80 1/4 mile track passes and easily 150 1/2 mile passes if you include the street. 3000-4000 miles on it before I snapped the stock crank at 7/8 rod journal (where it is hollow and drilled through after doing a big 1st thru 4th gear burnout and hooking up after letting out of the throttle in gear (T56 Magnum).
This motor had a TC78 on it... then a Precision GTS76 that went 9.20'[email protected] (made just over 1000rwhp maxed out) and now a Precision 88 (T4) (made 1060rwhp at 14psi on e85) that has tons left and went [email protected] with a 1.59 60ft and no traction control and non aggressive boost ramp.

New motor going in with K1 stock stroke and Calico coated bearings again this fall after a 3 year hiatus (self employed and growing my business so no real time for cars).
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Old 10-19-2019, 05:52 PM   #17
Caseville1
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Default Re: What bearing for stock crank LS 1000hp

For a forged aftermarket crank I prefer clevite H series over the king XP. I have had many inconsistencies with the XP for bearing clearances. Clevites are always dead on.
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Old 10-19-2019, 10:38 PM   #18
short1
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Default Re: What bearing for stock crank LS 1000hp

I decided to try out the King MB5013XP bearings when I redid my 5.3. I installed them and found the clearance to be .0035 . A bit looser than Id like. I put a set of clevite 2199P bearings in and got .0025. I couldn't tell why the kings were looser; I micd the wall thickness of the 2 brands and they were identical to .0001. Its like the Clevites had more crush and were smaller ID when installed. Weird.
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Old 10-30-2019, 05:40 PM   #19
RonSSNova
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Default Re: What bearing for stock crank LS 1000hp

We actually called King about this. They did not recommend the softer bearing. They recommended their coated bearings.
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