pressurizing the A engine

Gunmetal blue2

Gunmetal blue2

Senior Member
I need to know do you drill the old cranks to oil the main and rod bearings? Or do you drill the new cranks to do this? Also what for oil pump do you use. I would like to Thank all answers.
 
You can drill either old or new ones. Several pump options. A stock one can be modified to work but you have to add a pressure relief valve in the system.
I prefer the Dan Price pump because it has a calibrated built in relief valve.
 
Unless you really need it do not drill the crank. The stock oiling will work find for all but the high RPM engines. A drilled crank is a weaker crank.
 
Gunmetal blue2 said:
I need to know do you drill the old cranks to oil the main and rod bearings? Or do you drill the new cranks to do this? Also what for oil pump do you use. I would like to Thank all answers.
Click to expand...

Dan Price Website that shows his parts: http://www.dan4banger.com/index.html
Dan's oil pump is designed to mount to the B block fuel pump opening. I assume, you could modify the A block to provide mounting in the same general location.

Another option for an upgraded pump is one manufactured by Specialty Motor Cams (Stipe Machine). This pump is designed to move most of the oil out the 1/8" pipe plug to an external oil filter and eventually the distribution system.
I have used a couple of these pumps with good success.

I am currently building three B engines with increased pressure to the mains but still using new insert dipper rods. One for a durable touring engine, one for the Great Race and one for an overhead valve head. The Stipe oil pump is my choice for all three as it leaves the option to install an original B fuel pump. I like the built-in 40# pressure relief.
Most engine rebuilders will speculate that dipper oiling for the rods is okay up to about 4,000 RPM. Rev any higher or expect high loading...then you should go to pressure rod oiling.
Good Day!

High Volume Aluminum Oil Pump Full flow - well capped

With pressure relief 40 pounds

$345.00​
http://specialtymotorcams.com/pages/products.html
 
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You can pressure feed the main bearings without drilling the crankshaft, and many engine rebuilders do this. Drilling a Model A crankshaft is usually to get oil to the connecting rod journals, and this requires some precision by someone with experience.

In the Improved 4-Cylinder Ford Engine of 1932 to 1934, the rod journals remained splash lubricated. Chevrolet 6-cylinder engines had splash lubricated rods through 1954, so it works rather well for local and highway driving.

Unless you plan on racing, pressure oiling the rod journals is unnecessary.
 
No mention was made of counterweights, but I'd do that before I'd worry about the need for a pressurized oiling sustem for the main bearings. Counterweights greatly reduced the flex stress on the crank. Without counterweights there is a lot of off center weight trying to bend the crank, especially in the center main where you have double the off center weight.
 
Here is a photo of the 235 M-45 oil pump on a friends engine, also notice the 283 pistons. You can see that the inlet was moved to the bottom of the pump. I need to know if the outlet was changed to go through the upper pumps body or if it ran with a outside pipe to the top of the pump. A photo from the back side would tell. I like the idea of running this pump because of the larger diameter of the gears and that they are only $66 dollars from Summit. Any ideas would be appreciated.
Thanks again
Brian
 

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briphaeton said:
Here is a photo of the 235 M-45 oil pump on a friends engine, also notice the 283 pistons. You can see that the inlet was moved to the bottom of the pump. I need to know if the outlet was changed to go through the upper pumps body or if it ran with a outside pipe to the top of the pump. A photo from the back side would tell. I like the idea of running this pump because of the larger diameter of the gears and that they are only $66 dollars from Summit. Any ideas would be appreciated.
Thanks again
Brian
Click to expand...

Brian I believe your friend has done a lot of work to get that pump to work on a A model engine
That pump normally runs clockwise(almost sure) A model pumps run anticlockwise so it has all been reverse plumbed
 
Colin has it RIGHT and the oil is plumbed up thru the body. Also , it is a lot of a GOOD machinist work ! Hey, but it works great when done correctly ,eh ! And, it cost a heck of a lot less that the $400 to $500 for price/stipe oil pump system. I know, as I have a stipe oil pump in a B engine. Good luck and DO BUY JIM B. book as suggested !
This question and MANY more that you will have...are answered. Good luck :) !
 
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V4F said:
im using a modified v8 pump
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Yup, that's in my formula for the B going together now ! I found the machinist with the 'magic touch' :D !
Check out Jim B book, as it gives detailed directions on how to modify such...even has pictures for the likes of me:eek: !
 
I wanted to show you the Pontiac (M54) oil pump with adapter I thought about using. I made the adaptors. I thought this pump might be a little bit to much and was planned for a overhead. The tray has to be cut for clearance.
Brian
 

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