Piston to head clearance

[lmchevy]

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

[zipper06]

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]

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]

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).