what is the correct cc's on a gsr motor with 84.5 or 85.0 mm pistons. Any suggestions for brand or compression for an all motor low mileage daily driver? Thanks

 

Displacement in cubic centimeters for one cylinder (d) = (.1) bore area in millimeters x (.1) stroke

d = [.05 (bore diameter)]^2 x 3.1486 x (.1) stroke length

d, for bore diameter of 84.5mm = 490.103 cc per cylinder

490.103cc x 4 = 1960.4cc total engine displacement

I'll let you do the calculations for 85mm.