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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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You are correct that you can not mix and match between Alusil and Nikasil.
Nikasil is commonly regarded as a high silicon content aluminum. This is a hard material and requires rings to match. Relative to the cylinder walls the pistons are soft.
Alusil is commonly described as soft relative to the Fe piston coating.
Hard Nikasil rings create problems on soft Alusil cylinders.
If the pistons spec out then source some new 95mm Nikasil cylinders, re-ring and have fun with a healthy new motor.
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Jamie - I can explain it to you. But I can not understand it for you.
71 911T SWT - Sun and Fun Mobile
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