At the end of the day, it's all about the Driver.....
How often does someone hear about an OEM Pump breaking ? NOT very often I would say.
Most inexperienced builders/drivers throw on an N1 Oil pump onto their shiny new motors and think that they are now bullet proof.....and proceed to beat the sh!t out of the cars at the track and on the street, yet behaved themselves quite nicely when they were 'limited' by using an OEM Oil pump.
As there are not many BIG POWER Skylines in Canada thus far (as the cars have only been legal for a few years now), the quickest one at the end of 2009 turned out to be a 9 sec 2.8 Stroker Motor build, running Garrett GT2860R (-dash 5) turbos and an N1 Oil Pump. Scarry ? for me, yes, because I am brainwashed by the 'Interweb' and all of the 'Desktop Tuners' out there.
This motor DID however have a due amount of attention paid to PROPER pre-assembly BALANCING as well as the application of an ATI 1000 HP (7") Harmonic Balancer.
The driver has admitted to driving it HARD and Launching the car wthout a worry.....and it has made MANY 1/4 mile passes so far under the 10 sec mark.
Lucky ? partially, I would say.......but when the 'budget' didn't leave much for an Oil pump at the end of the day, the $250 USD 'sintered metal gear' pump still seems to be more or less, doing the job of a $1,250 'billet/strengthened gear' Oil Pump thanks to some additional planning and proper building....and realism.
N1 Pumps are not the problem. Drivers/Builders are.....