CLASS RACER FORUM - Piston to head clearance????

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art leong

09-20-2007 05:59 PM

Piston to head clearance????

Whats the recomended number for piston to head clearance, with an aluminum rod and a 330 gram piston???
I've got .0035 Do you think thats enough?

SuperStock 1890

09-20-2007 07:25 PM

Re: Piston to head clearance????

Nope. You need somewhere around .070. I used to use them a long time ago in Pontiac street engines when there were not any good rods for them. The 7075 T-6 aluminum would live on the street for if you kept the oil temp from getting high.

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