You will find a typical oiling dilemma With all the pre-1992 R32 RB26 motors, as being the area exactly where the crankshaft meets the oil pump was machined far too modest, inevitably leading to oil pump failure at high rpm. This issue was fixed in later variations in the RB26 https://daltoniculz.therainblog.com/30350470/5-essential-elements-for-nissan-skyline-rb26-engine