docang Posted May 30, 2008 Share Posted May 30, 2008 I've got a R34 gtt and may need to rebuild the engine later next yr with a short block and able to source a new stock 32gtr crankshaft for a good price. The question is whether the R32 RB26 crankshaft is suitable for the neo RB25det engine with stock R34 gtt pistons and rods? Thanks guys for any advice. Link to comment https://www.sau.com.au/forums/topic/221624-r32gtr-crankshaft/ Share on other sites More sharing options...
Sydneykid Posted May 30, 2008 Share Posted May 30, 2008 I've got a R34 gtt and may need to rebuild the engine later next yr with a short block and able to source a new stock 32gtr crankshaft for a good price.The question is whether the R32 RB26 crankshaft is suitable for the neo RB25det engine with stock R34 gtt pistons and rods? Thanks guys for any advice. Nope the stroke is 2 mm longer in the RB26 than the RB25, that's where the extra 70 cc's comes from. RB25 and RB26 rods are the same length, so you would need to use RB26 pistons. Make sure the RB26 crank is a alte model one with the wide (not narrow) flange oil pump drive. Cheers Gary Link to comment https://www.sau.com.au/forums/topic/221624-r32gtr-crankshaft/#findComment-3907431 Share on other sites More sharing options...
docang Posted May 30, 2008 Author Share Posted May 30, 2008 Nope the stroke is 2 mm longer in the RB26 than the RB25, that's where the extra 70 cc's comes from.RB25 and RB26 rods are the same length, so you would need to use RB26 pistons. Make sure the RB26 crank is a alte model one with the wide (not narrow) flange oil pump drive. Cheers Gary Tks Gary, well noted. Cheers Mate! Daniel Link to comment https://www.sau.com.au/forums/topic/221624-r32gtr-crankshaft/#findComment-3907605 Share on other sites More sharing options...
T04GTR Posted May 30, 2008 Share Posted May 30, 2008 what is the differance in chamber volume with 26 vs 25? Link to comment https://www.sau.com.au/forums/topic/221624-r32gtr-crankshaft/#findComment-3907755 Share on other sites More sharing options...
Adriano Posted May 31, 2008 Share Posted May 31, 2008 what is the differance in chamber volume with 26 vs 25? 25 non neo and 26 are basically the same(ie they vary about the same amount) Link to comment https://www.sau.com.au/forums/topic/221624-r32gtr-crankshaft/#findComment-3909169 Share on other sites More sharing options...
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