Piston to head clearance

Old 04-10-2008, 05:40 PM
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lmchevy
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Default Piston to head clearance

On a 620" BB Chevy is .045-.050 enough piston to head clearance with steel rods.The bore is 4.560.Thanks
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Old 04-10-2008, 10:34 PM
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zipper06
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I think so with steel rods, i've run .010 out with steel rods an a s/blk. I've got a blown alcohol s/blk with alum. rods and i'll be running .030 down with .052 gasket due to more clearance and piston rock on inital fire up.
I do build the engine so i can run a little happy juice (nitro) 10/20%) atmost.

JMO

Zip.
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Old 04-11-2008, 04:29 AM
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sg1586
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Default Re: Piston to head clearance

Originally Posted by lmchevy
On a 620" BB Chevy is .045-.050 enough piston to head clearance with steel rods.The bore is 4.560.Thanks


Just make sure you will have room for piston rock ....If everything is new you will be good, but if it's been puff honed a time or two be careful
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Old 04-11-2008, 08:44 AM
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OneBadGMC
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Default Re: Piston to head clearance

Originally Posted by lmchevy
On a 620" BB Chevy is .045-.050 enough piston to head clearance with steel rods.The bore is 4.560.Thanks
That's enough clearance for aluminum rods as well.

We run ours .010 in the hole, with a .050 gasket (MGP alum rods).
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