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Old 04-07-2008, 10:26 PM
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300EVIL 300EVIL is offline
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Join Date: Apr 2000
Location: Lake Geneva, WI.
Posts: 1,676
Originally Posted by JayRash View Post
i am doing a rebuild anyways so i thought forged will keep trouble away.
Do u know for what HP the original pistons are good for? will they take like 0.55 bar boost?
check this by the way:
If you only plan on running .5 bar of boost, your fine with a stock bottom end. Forged pistons are a good way to go but compression ratio is a more important factor when running boost. Your stock M103 is at 9.2:1 CR which should handle 8 psi without any problems. The stock pistons are a very tough cast alloy and will handle a good beating. Don't waste your money or time on pistons unless you are looking for 1 bar + boost.
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