Quote:
Originally Posted by Skippy597
Looking at nightmare performances page I'm not sure what they do to make the pump better. Their listing pretty much is a direct copy and paste of the melling 10540 pump. And appears they just add their plate to it. I may be wrong but I don't know why they wouldn't list the work done to improve performance.
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I'd recommend talking with Darrin at Nitemare directly. Like any of the performance pumps, they start with a melling piece and blueprint from there. If I recall my conversations, it's checked for straightness, run-out on the gears etc.
Darrin talked more specifically about the plate. It's a machined steel plate at .25" and the pro option has a .040x.040 machined ring under the drive and coast gears. It adds direct lubrication to the underside of the gears and Darrin claims in helps with cavitation.
I did his hole kit at the same time. pump, driveshaft and oil pan.
I won't pretend to be an oil-pump expert, but my engine building was impressed with the pump. He gave me unsolicited praise of it when I mentioned the engine had a nice oil pressure curve on the dyno. It does just about 85psi at 6000 rpm. With the hole kit I've never once seen oil starvation issues, and I swing the car around a good bit.