Piston to cylinder clearance

[exSW]

So,how much? I'm looking at a p to c clearance of 5-6 thousandths. With the new piston and rings it's pretty snug.

 

[huskihl]

I've heard min 2.5. I'd think 6 is still ok, especially if it's a new piston

 

[sawfun]

Forged pistons require more.

 

[Simondo]

So,how much? I'm looking at a p to c clearance of 5-6 thousandths. With the new piston and rings it's pretty snug.

Thats what im used to seeing and using Ross, but "Meteor web site" has a few more options. 5-6 is the norm though.
Here is the piston spec on a 262xp as a example.

 

[Lee H]

I set my 166's at 4.5 as well as Mac 797's. 101 Kart motors
i give 5.5. Haven't scuffed a piston yet.

 

[Al Smith]

When I made the cast iron liner for one of my Mac 125's I set it at 4.5 thou .

 

[exSW]

Back to this question. So is 5-6 thousands total or the clearance all around a centered piston?

 

[huskihl]

Back to this question. So is 5-6 thousands total or the clearance all around a centered piston?

Total.

 

[exSW]

Total.

Well then this piston's fer sh-sh-sh..... crap.

 

[huskihl]

That stinks.