8ba intake/fuel pump ???

I searched and searched and can not find a definate anwser. I have a 8ba flathead. I have a 32-48 Edmonds 2x2 intake I want to put on. The 8ba fuel pump will not fit. Will an older mech. fuel pump work, or is the fuel pump rod length wrong. Has anyone done this. I will not use the Edmonds if I have to use a elect. fuel pump. Can anyone help?

 

Watching this one intensely. I'm about to embark on this very journey myself.

 

The push rod may be the wrong length but I see no reason why the length couldn't be modified if the older pump rod won't work.

 

The early/late fuel pump pushrods were both different lengths and different diameters. Urkillinmesmalls (I think) found that the early bushing fits inside the 8BA bushing allowing an early pushrod.

There are a few possible combinations...

 

Yes. My motor came with a pushrod has something brazed on the end, it is an earlier motor, but it may be an Edmunds thing. Manifold is not on now, If you want I can get it out along with spare pushrods and get an accurate measure. It doesn't have to be much, as they move such a short stroke.

 

I'd really like to use this intake with a mech fuel pump. Anyone else done it?

 

I used an electric pump back by the tank. Plugged the hole for the pushrod and bolted an old pump to the engine. Make the fuel lines run through the old pump and you have a reliable, correct looking set up.

 

except you can hear that damn thing runnin as soon as you turn the key, good idea though

 

Straight pipes, baby....straight pipes.

 

I believe you simply replace the pump stand and pump with the earlier version for the manifold and use the push rod which is correct for the manifold.
There are 2 early pushrods, 8.872" long for cast iron manifolds and 7.872" long for aluminum manifolds.

 

Yes pasadenahotrod is correct.

 

I went electric, and would suggest others to do the same. JMO

 

For clarification, what do you mean that it will not fit? Does the pump housing rub against the firewall, bolts not match-up, or just the rod is the wrong length?

 

If you try to use the late stand with an early manifold, you won't have any place to fill with oil.

 

chata5,
You should use the early pump stand and pump with an early intake to allow oil fill, as stated above, and also for ventilation. The problem is the difference between the push rods. The late 30's-'48 measure 8 7/8" by 3/8", while the 8BA rods are 10 1/16" by 7/16". I've used a 59A push rod, pump and intake on 8BA's for break-in and testing on a stand, but you would probanbly do some damage to the push rod and/or 8BA bushing long term because of the additional clearance. One solution is to shorten a late push rod. If you look carefully you will notice the late rod is actually 3 pieces. (solid top and bottom with tubing in the middle) I think all you have to do is remove the small solid top cap, shorten the tube, and replace the cap. The umbrella on the early rod acts like a baffle and helps keep excess oil from going up the pump stand-something you might find necessary if using a modified late push rod. I'm not sure, but think the cap will fit the 59 or other early pump cam arms without modification.
Add a PCV valve plumbed from the 8BA front chamber tube to the intake and your done.
Bob

 

This question has been going on for some time. This may not be your definitive answer but I hope it gives you some reference. The 8ba fuel pump pushrod at 10.097" is too long for the 59a manifold/fuel pump stand setup. The 59a pushrods were 8.87" for cast manifolds and 7.87 for Ford's stock alum. manifolds. You didn't say if you were using the 8ba fuel pump stand or not, if you are, change to the 59a fuel pump stand and pump.. This will also solve the problem of oil fill that Flatjack noted. Next you need to determine the lenght the pushrod needs to be. To do this you need to know that the stock 59a cast manifold has a fuel pump stand flange height of 2 5/16" with a corresponding pushrod of 8.87" I have never measured one but I assume that the stock Ford alum. manifold flange height has to be 1 5/16" since it's corresponding pushrod is 7.87" and both use the same stand and pump. Now measure the height of the flange on your Edmonds and compare the differance (if any) with the stock heights. If the Edmonds flang height is 2 5/16 or 1 5/16 you need the same length as the corresponding stock pushrod. If its 2 1/16" high you need to deduct 1/4" from the stock length cast pushrod,etc.,etc. Once you have the length determined you need to decide which pushrod you will use. The easiest choice would be to cut down the 8ba rod and save yourself the headache of adapting the pushrod bushing to the 8ba block . If you choose to use the 59a rod because the stock length is the same as you need, understand that the diameter of the rod and bushing are also different than the 8ba. The 8ba bushing has an ID. of 0.435 with a corresponding rod, while the 59a bushing has an ID of 0.375 with a corresponding rod. Flat Ernie is correct when he says the 59a bushing will fit in the 8ba bushing since its OD. of 0.435 is the same same as the 8ba ID. If memory serves me correctly I think there is a difference in their length so some trimming may be necessary. I hope this gives you some insight.

 

Actually I've been running this setup - early manifold and pump on 8BA engine. I built this about 16 - 17 years ago and used the 59A pushrod without changing the bushing or anything(didn't know any better at the time). Anyway that was about 60,000 miles ago and it is still running with no problems.

 

Finally, the help I've been looking for. Thank you.

 

Looking at the back of the manifold, note the height from surface sitting on block to surface where pump stand sits; if it is very roughly 1" high, short early rod. If about 2", long early rod.