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Old 09-29-2017, 06:08 PM   #1
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Default Standard oil pump or hi- volume 59 block 8ba crank

Building a 59ab with and 8ba crank. Can I use a standard ford 59ab oil pump or now that I have insert bearing and not floaty do I need to run a hi - volume oil pump.
Did my search last night and talk to a buddy today I thought I would ask the expert Ford Barn ...any imput ,thanks in advance .
I have a nice ford 59 pump and a NOS still in the box Milling rebuilding kit made in USA ....
Thanks
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Old 09-29-2017, 06:10 PM   #2
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Default Re: Standard oil pump or hi- volume 59 block 8ba crank

I see no reason for a high volume. Some folks change over to the 8BA type but you have to have a pickup that will work with the pan on the 59 series.
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Old 09-29-2017, 07:45 PM   #3
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Default Re: Standard oil pump or hi- volume 59 block 8ba crank

I will second the motion against High Volume oil pumps. They are only for racing engines with large clearances and not only do they not do anything to help regular engines, in some cases they can cause real problems.

Last edited by tubman; 10-07-2017 at 07:01 AM.
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Old 09-30-2017, 12:01 PM   #4
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Default Re: Standard oil pump or hi- volume 59 block 8ba crank

I chose to use an 8ba Mellings M19 OP & truck pickup tube & screen in my 284 ci, 59 engine build. The OP I would suggest "not" using is a Mellings M15 unless you're building a racing engine with loose fitting bearings.
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Old 09-30-2017, 12:37 PM   #5
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Default Re: Standard oil pump or hi- volume 59 block 8ba crank

Right thing in the right place...do you need the bearing clearance...then you need a highflow pump.
If you donīt need the clearance you only gain heat and perhaps bearing cavitation trying to push a lot of flow through a narrow space.
So why do you need larger bearing clearance...when you start pushing an engine to the limit metal flex.
Oil has a limitation in load...no one would use a 70W oil in an engine if they didnīt need it for a reason...you donīt need the heavy oil to deal with force...you have everything to win with a lighter oil and tighter bearing clearances.
An engine that has been linebored dead on...crank that has been ground and micropolished...good synthetic oil...you can go down to .00075 in clearance.... a normal setup needs .001 clearance for every inch of bearing diameter as rule of thumb.
Tighter bearing specs distribute load better giving less friction combined with a thin oil taking less power to pump.
A race engine is basicly "worn out" from start in the bearings to be able to deal with force and heat.
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Old 09-30-2017, 01:29 PM   #6
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Default Re: Standard oil pump or hi- volume 59 block 8ba crank

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Thanks for reply ...standard 59 oil pump for this build ...
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Old 10-05-2017, 01:58 PM   #7
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Default Re: Standard oil pump or hi- volume 59 block 8ba crank

Doe anyone know anything about Bob Drake's 80lb oil pump?

https://www.bobdrake.com/FordItem.aspx?Item=HR-6600-A

vs the Melling M-19

http://www.speedwaymotors.com/Mellin...ume,21511.html

I'm building a 59 with Merc crank right now and need an oil pump...
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Old 10-05-2017, 04:01 PM   #8
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Default Re: Standard oil pump or hi- volume 59 block 8ba crank

80 lb. pump? Why? All you're doing is heating the oil by forcing an excessive amount through the bearings and wasting horsepower at the same time. With factory bearing clearances, factory oil pressure is plenty.
This may be an apples and oranges comparison, but I drag race a '67 Cougar with a 289. It sees at least 7400 RPM every run. It has a stock standard volume, standard pressure oil pump with around 40-45 lbs. pressure. Been doing this for about 15 years and the crank was still standard when I had it apart last winter to install domed pistons. I even reused the same bearings. Read up on the theory of hydrodynamic lubrication and you will see that high oil pressures are not needed in normal or even mild performance use. Endurance or Bonneville type racing has different requirements to allow for extra loose clearances and bearing and oil cooling.
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Old 10-07-2017, 06:16 AM   #9
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Default Re: Standard oil pump or hi- volume 59 block 8ba crank

Melling 19 on both my "built" Flatheads. Good pressure, no problems.
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Old 10-07-2017, 10:11 AM   #10
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Default Re: Standard oil pump or hi- volume 59 block 8ba crank

A high volume pump delivers a high volume of oil , not high pressure.
So with tight bearing tolerance , pressure is the same as with loose bearing tolerance.
Because it can deliver enough volume through bigger gears inside.
Pressure is controlled by the spring inside.
I switched from stock to high volume pump. Pressure stayed the same.
Big engine with street clearance. Insurance.....
Not needed in a stockish engine

BTW i used a NOS Melling , not a cheap repop( they might be setup wrong)
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Old 10-07-2017, 10:20 AM   #11
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Default Re: Standard oil pump or hi- volume 59 block 8ba crank

For a high pressure pump you use the ones from a 255ci french flathead.
I have one in my "race" ( not really,but afte polishing the crank , it got bigger tolerance)loose tolerance engine. Works since a couple of 1000 miles.
304 with potvin 425
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Old 10-07-2017, 10:43 AM   #12
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Default Re: Standard oil pump or hi- volume 59 block 8ba crank

Quote:
Originally Posted by 41LjH View Post
Melling 19 on both my "built" Flatheads. Good pressure, no problems.
Roger on the Mellings M19 OP. That's what I am using in my 35 21 stud engine that now has 32k since rebuild and in a 59 series 284 ci engine I built for a traditional hotrod. I would not suggest using an M15 OP in an engine intended for street use.

The Mellings M19 OP is available at Speedway and Amazon :

https://www.amazon.com/Melling-Pump-.../dp/B001T8IU1S

http://www.speedwaymotors.com/Mellin...ume,21511.html
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