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spec e30 pistons


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  • 2 weeks later...
Posted

how are those pistons eligible for spec e30?

bruce

 

9.3.1.2.2. All pistons, including aftermarket replacements, shall (3.1) be factory replacement spec and match factory dome, dish, valve relief depth, ring groove placement, weight and wrist pin height; compression shall (3.1) meet factory replacement specifications. The maximum allowable overbore is limited to the largest available factory replacement piston, not to exceed .020 inch.
Posted

Unfortunately not. They are 1mm (.0396) overbore, and the valve reliefs are larger than stock. Thanks for asking. Chuck

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