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Old 14th January 2018, 11:45 PM   #21
Chady
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I’m in the process of rebuilding spare csl motor, all striped now, head work valves re lapped, crank hand polished, ready to go, compleat head gasket set £180. King race mains and rod. £280 from memory new rings £120 full set, was possibly thinking wossner pistons, But will may use stay with oem, open ended book on how far u go regarding parts. Have asked for feedback on parts in the past with little feedback,guessing most don’t go this far ..This is just a fun rebuild not serious race build , doesn’t seem much around on this subject
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 ???
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Old 16th January 2018, 09:58 AM   #22
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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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Old 16th January 2018, 10:29 AM   #23
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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.
thanks for feedback Iain, Head hasn’t been skimmed std csl head and valves, it’s all just a learning curve for me with engine build. As mentioned previously this is spair csl motor, hopefully will try it in mine or the lads car, Not sure which way to go regarding aftermarket internals pistons rods “open to suggestions”
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