thanks for all this guys, ive also been in consultation with my boss, Adam cope from ACM, he does drag racing motors and bits and pieces here and there so he is going to help me build it, along with some of his contacts.
the basic idea for the recipe are:
flattops, (mazda or acl), no idea of the rods to be used basically the size needed to achieve this, no idea of the cam size (got to check with adams cam man), no idea of the valve size, double valve springs, roller rockers, no idea on the headwork, including shaving or chamber parts, (check with the head guy adam uses in oberon), and fuel injection with a wolf 3d ecu. thats what i have so far.
the reason for stating the 88.5mm stroke is that i was reading throught the wiki and saw that "1608cc is commonly got with the combination of a 79mm bore and an 88.5mm stroke."
i even sat down with my calculator for a while (after asking the q') and worked out that that would give me a capacity of 1735cc, ????? so sorry bout that guys.
i understand that the world of engine building is that you have to make your own mark in the sand, so thanks again for the help.
my current A15 is built to run at 8000rpm. aparently it has the mazda flattop pistons, no idea of the bore size, no idea of the headwork or valve size, but the cam in it wont go at anything under 3000-3500 then pulls to around 5000 then pulls harder all the way to 8000
so two things have been settled for good, 79mm bore, and its pointless offset grinding the crank for the class of racing im going to be in
thanks again guys, muchly appreciated