wossener pistons, anyone had bother with them slapping?
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ANY forged piston does require a bigger than standard gap though, its not just one make, so its inevitable that there will be a little noise on very cold days compared to a new standard piston.
The normal problem is people who take a 80,000 mile old block, then hone it, then fit a set of pistons, and its all sloppy as a result.
Rebore to an oversize with the correct clearance is the only way to get it right.
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My own engine runs Cosworth forged pistons and from cold they are a little noisy. Once warm they are quiet.
I have also built an engine with Wossner forged pistons an they were slightly quieter than my Cosworth pistons and went quiet once warm.
Both engines were bored to the recommended tolerances and I seem to remember the Wossners being around 4 thousandths of an inch clearance gap.
I have also built an engine with Wossner forged pistons an they were slightly quieter than my Cosworth pistons and went quiet once warm.
Both engines were bored to the recommended tolerances and I seem to remember the Wossners being around 4 thousandths of an inch clearance gap.
Last edited by DazC; 08-11-2010 at 11:58 AM.
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