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-   -   Piston to head clearance (https://www.racingjunk.com/forums/showthread.php?t=20496)

lmchevy 04-10-2008 04:40 PM
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

zipper06 04-10-2008 09:34 PM
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.

sg1586 04-11-2008 03:29 AM
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 :D ....If everything is new you will be good, but if it's been puff honed a time or two be careful :D

OneBadGMC 04-11-2008 07:44 AM
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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