Hi guys,
I have a standard RB25 engine and willing to tune it to about 500hp. Currently, I've got RB26 N1 crankshaft, conrods and 87mm pistons. Is it possible to put it inside RB25 motor? Probably, 87mm pistons are too big, but if I buy new pistons, will it be possible to assemble engine with RB26 crank and conrods? What other mods would you recomend? I already have aftermarket oil and water pumps, large oil sump. What about camshafts and valves? I have complete cylinder head from RB26 (272 IN/EX camshafts, standard size valves), is it possible to fit valves and camshafts into RB25 head?