sammyp.

righto, cheers for the info I'll have to check it out and go from there

Well that's definately not right then. Cheers for that info. I can prob get it for around 5g's and the car itself is straight as, guy who owns it didn't build the motor so he's probably just being fed a load of horse shit. I've seen it start up and drive etc and it sounds spot on even on a cold start, no misses, knocks etc. He also said it's been bored out 1.5mm to suit the rb26 pistons but I thought they were the same bore as a rb25? Could it be an rb20 block he's started with? Also rb's are stamped on the block aren't they? Does anyone know where exactly they're stamped?

Hi all, So I'm looking at a r31 with an rb25 conversion that's for sale at the moment. The car's neat, good conversion etc. However, the bloke who own's the car told me what I think to be conflicting information. He reckons it's a r34 rb25 with rb26 pistons, rb20 crank and rb20 cams. He also said that this brings the compression ratio down to somewhere in the region of around 7.5/1. Does this sound right to anybody? I've done a few google searches and it seems to be there's plenty of options out there to destroke a rb25 but this is not one of them. Can anybody shed some light on this for me?