Hello all.
I've have a question about RB31DET's.
What makes them 31's, different from the 30's?
I have a series 2 N/A RB30 that I'm bolting a RB26 head to & putting it in my Z32. I'm going to be using forged pistons antway & was wondering if the RB31 is just a overbored RB30. I've been searching around on here & the interweb but can't find the info on what makes a RB31 a RB31.
Any replys would be graetfully received.
Thanks
Stu.