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SmurfOnABoat

04-22-2011 10:58 AM

10778C oil pump, which pressure spring?

Which pressure spring are you guys running with these oil pumps? The high pressure one that comes pre-installed or are you swapping out for the lower pressure spring that comes with the pump.

1999 HP500

endeavour32

04-22-2011 11:05 AM

Quote:

Originally Posted by SmurfOnABoat (Post 3383939)

Use the spring that it comes installed! I'm running the same pump.

Boat1

04-22-2011 05:14 PM

+ 1

Vinny P

04-23-2011 05:14 AM

X2 Have used that pump on a few engines thus far, great pump.

blue thunder

05-05-2011 06:47 AM

Quote:

Originally Posted by Vinny P (Post 3384390)

X2 Have used that pump on a few engines thus far, great pump.

What sort of idle oil pressures are you getting with that pump and the purple (High pressure) spring? I am trying them for the first time this spring and noted on the cut sheet that came with the pumps that these are not recommended for stock applications because the idle pressure will be low. Do you guys see that? I fired my 2 new engines with them and cold idle is 55psi which I am happy with but wonder what hot might be. I guess the anti cavitation grooves these pumps have must bleed of OP at low rpm?

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