aye, it sounded exactly like a diesel engine dave , the weldfilled 2mm skimmed chamber came out @ 18cc (stock chamber 26cc) a CG13 dish @ 6.5cc and a CGA dish @9cc
Ah ok, yeah I forgot you had 18cc chambers wow! I think from rough calcs we'll end up on a 24'ish cc chamber but that's to be decided once everything is cc'd. We shouldn't need to change it much given that we have positive deck height on the piston.