Originally Posted by
happynole Please explain 'very complicated'. Does a 94mm bore create interference problems?
94mm bore is very complicated. There will be lots of issues with keeping the head gasket sealed, not to mention it is a one off custom head gasket. I would not tell anyone else to go larger than 92mm unless they wanted every last possible HP and money was no object.
there is no interference on 94mm bore, but to get the most out of the motor, you better have a very well overworked cylinder head with the largest valves possible, chamber welding, deshrouding and so on. Otherwise all the work and money spent to get a 94mm setup to seal will be wasted.
Bottom line, if your not sure how to overcome and solve head gasket sealing issues with 3mm between pistons, then stick with a 92mm bore.