Piston clearance
May 5, 2011 | 08:39 PM
#11
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Staging Lane
Joined: Apr 2011
Posts: 78
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From: Montgomery County, TX
What piston is it, that definitely makes a difference in where you should set piston to wall clearance!
FYI: When you buy a piston that is labeled 4.030" bore, that will typically be right at the actually bore size of the hole, and the manufacturer will have built the clearance into the piston by making it 4.026" or so. Also, be sure you measure the piston 90º from the pin. Pistons are sort of egg-shaped, and measuring anywhere else is not right and will distort your readings.
FYI: When you buy a piston that is labeled 4.030" bore, that will typically be right at the actually bore size of the hole, and the manufacturer will have built the clearance into the piston by making it 4.026" or so. Also, be sure you measure the piston 90º from the pin. Pistons are sort of egg-shaped, and measuring anywhere else is not right and will distort your readings.
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