Oil clearance

[jettster91]

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

 

[Thruapole]

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.

 

[jettster91]

So with my .0015 I should be safe. And shouldn't have any oil problems with rpm?

 

[Thruapole]

I think you are safe. Possibly the machine shop you are using is used to seeing v8 stuff with .003-.004 being normal

 

[JacksonAuto]

.0015" is a little tight. Factory specs are for stock engines. You'll want to stay on the mid-high side of the specified range.

 

[Kapok6]

I had mine set to right around .0025".

 

[JacksonAuto]

The mains I hope.

 

[pindlepiper]

What is ideal for rods and for mains? 500-700hp

 

[bastarddsm]

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.