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enkeivette · 05-28-2013, 01:59 AM

.007 piston clearance is a .014 larger bore. And .03 sounds dangerously tight to me for forged pistons. I've heard of up to .012 clearance/ .022 larger bore.

I'd rather run too much clearance than not enough, without question. I've never heard of a piston rocking itself to death. Same with piston rings, I filed mine to the largest tolerance allowed. Who gives a fuck if it costs me 5hp? I dont want it binding when I push it heat soaked on a hot day.

But anyways... compared to my SBC pistons, this little Honda piston has NO room to breathe. There is no rocking back and forth, in fact with the bit of rust that formed I had to smack the piston out of the hole with a hammer. Hard. So Im not terribly worried. If it was closer to .02/ .03 I would have gone with an oversized piston.

05-28-2013, 01:59 AM	#7
enkeivette Super Moderator Join Date: Dec 2007 Posts: 6,850 Tweet	.007 piston clearance is a .014 larger bore. And .03 sounds dangerously tight to me for forged pistons. I've heard of up to .012 clearance/ .022 larger bore. I'd rather run too much clearance than not enough, without question. I've never heard of a piston rocking itself to death. Same with piston rings, I filed mine to the largest tolerance allowed. Who gives a fuck if it costs me 5hp? I dont want it binding when I push it heat soaked on a hot day. But anyways... compared to my SBC pistons, this little Honda piston has NO room to breathe. There is no rocking back and forth, in fact with the bit of rust that formed I had to smack the piston out of the hole with a hammer. Hard. So Im not terribly worried. If it was closer to .02/ .03 I would have gone with an oversized piston. __________________ I <3 forced induction.