LPOP flow? - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 7 (permalink) Old 09-18-2009, 09:36 PM Thread Starter
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LPOP flow?

Does anyone know the gpm of the stock lpop or the displacement of it?

95 Ex. Cab Long Bed 4x4. Built.

01 Ex. Cab Long Bed Dually 4x4 6 Speed. Intake, Exhaust, Super Chips Tuned
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post #2 of 7 (permalink) Old 09-18-2009, 11:14 PM
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Re: LPOP flow?

It's around 7gpm at idle rpms I believe.
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post #3 of 7 (permalink) Old 09-21-2009, 04:17 AM
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Re: LPOP flow?

And to add to that, how much more is the Melling unit?

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post #4 of 7 (permalink) Old 09-21-2009, 05:17 AM
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Re: LPOP flow?

useless info post ...

from what I remember it is not much more but still flows better, or more efficient if that makes any sense to you. seems like itp sold them

but here is a pic of the difference between them.
Original LPOP pump on right and new Melling pump on left. Notice the new one has 10 teeth while pictures from cars photos on webshots

Early 99 f350 4x4 crew cab, auto. pmt2 pcm
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post #5 of 7 (permalink) Old 09-21-2009, 05:21 AM
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Re: LPOP flow?

Quote:
Originally Posted by PowerstrokeJunkie View Post
And to add to that, how much more is the Melling unit?
Pretty sure golfer posted this at one point, but of course I can't find it now.


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post #6 of 7 (permalink) Old 09-21-2009, 07:49 AM
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Re: LPOP flow?

Below 2500 rpm the flow rate is as good as or slightly better than a stock pump.
Above 2500 rpm the flow rate is increased over the stock pump.
Above 3500 rpm the flow rate is 10% more than stock.

At test rpm of 700 rpm , 7 gpm
At test rpm of 4000 rpm , 25gpm

The pump was re-designed to perform better than the stock pump. The M208 pump was desined to help out engine oiling issues and premature wear occurring in the pump. It was designed to improve the oil delivery to the engine. The Melling gerotor has a 10 lobed inner versus 14 lobes on the original pump. A 10 lobed inner provides a larger pumping chamber which allowed for a 30% reduction in the thickness of the gerotor set. The reduced thickness eliminated the need for the counter bore on the inner rotor for clearance of the harmonic balancer. M208 output is meant to provide the same flow as the original pump but with better oil quality since the gerotor will fill better since it is not as deep as the original.
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post #7 of 7 (permalink) Old 09-22-2009, 05:55 PM
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Re: LPOP flow?

It's hard to believe that simple little pump setup can fill up 5- 5 gallon buckets in a minute

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