There is a typical oiling issue Using the pre-1992 R32 RB26 motors, because the surface area the place the crankshaft meets the oil pump was machined as well smaller, inevitably leading to oil pump failure at large rpm. This issue was solved in later on versions from the RB26 using https://connereehfe.daneblogger.com/30554476/top-guidelines-of-rb26-motor