I am building my rb20.. and as im aware the rb20 oil pumps are relatively average.. My question is this.. I was looking at going an N1 GTR pump for the rb20.. However my builder has informed me that the crank needs 2 be modified.. He said it is direct bolt on but something about when the car is under alot of load the pump doesnt drive at 100% due to the n1 pump being high volume or some shit about the crank being too short??
Can anyone help me on this or give me a alternative pump (ie: tomei etc) that they have personally used & trust.
Thanks,
Steve.