Used an N1 oil pump for a year on my built 26.
Never lost pressure, never missed a beat, just make sure you get a ridgey didge one (nissan)
And mind you, at the time it was running, the pump had had probably a 2 inch chunk smashed out of it, plus damage to the sump which had been badly bogged up, and still worked.
Sent car to workshop to fix it all up, put new N1 Pump on it.
now shooting for 400AWKW.
Running big oil cooler for extra volume and cooling capacity