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Oil clearance

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jettster91

10+ Year Contributor
54
0
Feb 4, 2011
caledonia, Illinois
Finally got everything back from the machine shop and started assembly today I plasti gauged the mains came up with .002 and .0015 on the rods. I know the manual says Main and rods are .0008 to .002 But my machinest says that .0015 is to tight for the rods, And that i could possibly cause lack of oil pressure to the rod bearing at higher RPM eventually leading to a spun rod bearing.. Kinda just looking for what you guys are running. and experiences

Bottom end specs.
Manley .20 over pistons
Manley H beams
ARP mains
Kiggly girdle.
Line Hone.
Stock 6 Bolt Crank Polished STD/STD
 
Usually, the rule of thumb is .001" per inch. so at 1.771", one might want around .0017" of clearance. Mine all came in at .0018" and I was happy with that but I would have left .0015" alone as well.. You want the rods to have less clearance than the mains so watch out for that too.
 
Jettsetter,

that's right about what mine come out to be. I've had great results with it using rotella T 15W40 standard dino oil, going 9500prm and making 600whp.

You could probably have the crank polished a little extra, or run some extra clearance bearings like ACL makes.
 
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