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Old 11-24-2003, 21:59   #1 (permalink)
ESP
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High Volume or Standard Volume

Hi Everyone

I'm replacing my oil pump and would like input on whether to go High Volume or Standard volume.

The motor is a 351 Clevo with an extended sump.
Revs to 5500 RPM

Any opinions , fact or otherwise ???????
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Old 11-24-2003, 22:33   #2 (permalink)
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Re: High Volume or Standard Volume

Stay with the standard pump, Clevos usually have too much oil in the top end as it is.
Either would actually work ok at 5500rpm.

Rick.
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Old 11-24-2003, 23:29   #3 (permalink)
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Re: High Volume or Standard Volume

high volume pumps usually sap a heap of horsepower....
go a standard pump with a stronger spring..
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Old 11-25-2003, 01:52   #4 (permalink)
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Re: High Volume or Standard Volume

I am with soxx and phil .. standard.
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Old 11-25-2003, 19:43   #5 (permalink)
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Re: High Volume or Standard Volume

Thanks guys,

I'll go the standard volume Mellings Pump with the Bigger Spring

Cheers
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Old 11-26-2003, 05:03   #6 (permalink)
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Re: High Volume or Standard Volume

High volume but std pressure, seeing you have larger sump..Problems usually arise with hi pressure pumps ....
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Old 11-26-2003, 19:47   #7 (permalink)
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Question Re: High Volume or Standard Volume

OK,

Here's the drill

I got the standard pump and also a Higher Pressure spring
It is a MOROSO pump spring , it says on the Pack that it can increse the Oil pressure up to 100 PSI.

Should I replace the standard spring with this one !!!

Cheers
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Old 11-26-2003, 19:48   #8 (permalink)
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Re: High Volume or Standard Volume

Well if soxx is right about too much oil living in the top of the motor as it is .........NO

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Old 11-26-2003, 20:09   #9 (permalink)
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Re: High Volume or Standard Volume

Of course I'm right Dellboy .
Clevos are known for this problem, the oiling system isn't one of there strong points, but it can easily be fixed.

If your engine is fresh with new bearings, pistons, rings, etc, then use the standard spring.

If you're just putting a new pump into an older engine with quite a few k's, then the high pressure spring will be better.

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Old 11-26-2003, 21:02   #10 (permalink)
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Re: High Volume or Standard Volume

The engine was re built 7000 k's ago
It was running approx 65 psi under load with the High Volume Mellings Pump.

100 Psi sounds a bit high ( Moroso spec on the spring card )
What are the benefits / downsides to running a higher pressure ????
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