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Author Topic:   forged pistons
4340
Member
posted May 16, 2003 04:38 PM
Odds are they just have rough places in the pin bores . This is common for pin pressed pistons . They can be fixed on a rod machine using a wrist pin bore hone . Ideally you will want .0008"-.001" pin bore clearance in the pistons . They will run with as much as .0015" , but that's pushing it . So long as your pin bore's remain in this tolerance , you should be ok . You can go to a larger wrist pin if needed , but you will have to hone the pistons and rod's accordingly .

Steve

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Hendren Racing Engines
Rutherfordton , NC
(828)286-0780


4340
Member
posted May 16, 2003 05:26 PM
thanks, that is the reply i was hoping to get
now if i can trust a machinist to get the
right tolerance!


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