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Old 16th January 2018, 09:58 AM   #22
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Join Date: Apr 2010
Location: Isle of man
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Originally Posted by Chady View Post
Anybody used these wossner 12.3.1 pistons std bore size, “”Any feedback welcome”” as they are slightly higher compression,any problems encountered???, I’d assume they would need to run minimum supper unleaded or possibly race fuel ???
Not used them but your kind of asking the wrong questions as the CR will vary depending on what cam your using, obviously the static is the static but ultimately its the dynamic CR thats going to be doing the do, so depending on the overlap and duration of the cam your going to get a different result

That said, 12.3 is not all that high, it will be fine on 98, i would be more concerned with the valve clearance if the head has been skimmed, you may need to get the pockets milled.
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