time for an update.
thanks for all of your help, like paul said just keep probeing peoples information and you will get somewhere.
i now have an a15 bottom end in the "development" stage (thanks steve) so far it is going to be crack tested, and the crank will be shot peened and nitrided, the bore will be a 79mm job producing a 1608cc displacement with the standard rod length, despite a very extensive and usefull argument for both sides of the boring out vs stroking debate. arp rod bolts and mains studs are to be used, but im undecided to go with the standard rods or get some aftermarket ones either made or off the shelf. the bottom end will be turning to around 8000rpm, like my current race engine, (its 6 years old and hasnt had a rebuild and still makes 90rwhp)
daniel i dont know how to do static or dynamic compression tests but im sure if i asked adam he would tell me. do you need to know the bore size and the stroke size. i know when i comp tested it it was 220psi on each cylinder.
and with the mazda pistons do they have cut outs for the valve to piston clearance, because mine are visible through the spark plug hole, there are 2 cutouts (i forget what they are called) one for exhaust and one for inlet meaning that the engine could possibly have a large valve overlap or cam lift
thanks again guys