Early Injection for Flathead V8

SUHRsc

SUHRsc

Well-known member
I found a really early, flathead fuel injection at Hershey on Tuesday. I have not been able to find much information on it. It looks identical to ones that are cast "Hilborn Trevors", but this has no markings at all.

I would like to know any history anyone may have and also any tips on making it work.
(This will go on a dirt track race car, not for the street)

I only got the actual injection when I bought it, no pump.

I have a few pumps that I found in my garage, one of which was with an injection for an Offenhauser.

I would like to find the correct period pump that will work.

I am guessing this is late 1940's?

Thank you for any and all help!
Zach





Looks to have never been used?


#12 nozzles, alcohol?


This is the pump that was with an Offy injection.






I found all of these pumps in a crate of surplus parts in my garage.
 
Call hilborn they will answer your questions as well as make up or sell you what you need..

12s would be for alky....... 5s are what we usually need for gasoline......
 
What kind of car will it go in .A dragster would be the ticket.

R
 
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Aircraft use pumps similar to some of those pictured. Lear Romec are about the only ones available today but most have a square shaped flange that uses an AN type flange gasket. The early injection units likely would have had a purpose built pump more similar to the one first pictured.
 
Zach, I can't see the barrel valve to clearly in your photo, but that maybe an Algon Injector. 95% of all Hilborn units, have a serial number stamped on it.
 
Thanks. This will be on a dirt track roadster eventually. Where would the numbers be stamped? This appears to be milled where the cast names are on a Hilborn-Trevors?
 
I have a photo of a unit that belongs to a friend and looks like the one in the SRP pic above. This stuff is outside my area of expertise, except I can see in my pic it's TRAVERS not TREVORS.

Might help if looking for parts.

My friends unit states:

PAT PEND
HILBORN - TRAVERS
LOS ANGELES

Mart.
 
Zach:

Nice find. I don't think that's Algon. I think they were two piece, but they did have the injectors on an angle though... Mystery piece. Early for sure.
 
Tim Ayers said:
Zach:

Nice find. I don't think that's Algon. I think they were two piece, but they did have the injectors on an angle though... Mystery piece. Early for sure.
Click to expand...

Algon injectors, for flathead V8's, small an big block chevy's, were all one piece, I' ve owned them all at one time. Hilborn, an Algon were the only two company's that made a port injector for flatheads, an Hilborn made a ton more than Algon. Algon injectors were very hard to tune, they came with ajustable nozzels, and the main jet was inside the barrel valve, like an Enderle.
 
34fivewindow said:
Algon injectors, for flathead V8's, small an big block chevy's, were all one piece, I' ve owned them all at one time. Hilborn, an Algon were the only two company's that made a port injector for flatheads, an Hilborn made a ton more than Algon. Algon injectors were very hard to tune, they came with ajustable nozzels, and the main jet was inside the barrel valve, like an Enderle.
Click to expand...

Thanks. Maybe that's what I was thinking. I know there was something different. Did the stacks criss cross or something different as well?
 
Thanks everyone.... I'm about 99% sure its a Hilborn-Travers (thanks for the spelling). It looks like it was milled around the edge for some reason? but everything else looks identical.

Does anyone have any original advertising or anything showing what pump came with the early ones?

I'd like to find the correct period pump that will work with alcohol.
 
A buddy of mine told me about that. By the time I got over there, it was gone. Glad it went to a good home.
 
I gave you a shot flatjack! I walked away for about 45 minutes collecting more money so I could "try" to buy this.

I was very surprised that it was still there when I came back.
 
SUHRsc said:
Thanks everyone.... I'm about 99% sure its a Hilborn-Travers (thanks for the spelling). It looks like it was milled around the edge for some reason? but everything else looks identical.

Does anyone have any original advertising or anything showing what pump came with the early ones?

I'd like to find the correct period pump that will work with alcohol.
Click to expand...

Zach, the early style hilborn pump, is what your two picture's are. The injector you just bought, has Hilborn nozzels in it, and the hoses are also Hilborn. The 12A nozzels, are made for methanol, and for an engine 180 to 230 cu. in. So if your going to put this on a big bore, and stroked engine, your going to need bigger nozzels, like a 16A. The 16A's are for an engine from 266 to 315 cu. in. If you have the balls, and want to hear what a flathead sounds like on Nitro, you can run 20% with the methanol nozzels, with only making a jet change. On the Hilborn nozzels, under the allen screw, there are very fine screens. I found these plugged up, with lint, from old racers useing a shop rag to strain the fuel, going into the tank.


Those early pumps ..... BL235 were for small engines like an Offenhauser midget engine
BL420 is for 200 thru 300 cu. in. these are for gas, alky, an small
amounts of Nitro.

The PG150A - 0 is the pump I would look for, way better than those early pumps.
 
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Thank you very much "34"

Do you have any photos of how the BL420 pump would mount on a flathead?

Also, where would the number be stamped? I'm guessing mine is milled off with the name.

Thanks alot!
Zach
 
Pictures of a nice unit. Original owner ran it in a totally gutted shoebox as a professional street racer. He killed the roadsters and early coupes. They never knew what hit them.
 

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Cool Kat with Hot Car said:
Pictures of a nice unit. Original owner ran it in a totally gutted shoebox as a professional street racer. He killed the roadsters and early coupes. They never knew what hit them.
Click to expand...

Thank you very much!
Great shots of the pump drive too, which I am missing.

It looks like the BL420 pump is adjustable on the return instead of a jet to change?

I found some different parts in my garage, even a steel plate to bolt the pump in a vice to work on them.

I bought out an old racer so its need to actually figure out the uses for some of the things laying around

Thanks
Zach
 
I found an inline "pill" today in the garage for the return line.... also a T drive for the Hilborn BL420 pump that I can use to run the pump off the timing cover and then the distributor or magneto off the side...

Seems like I will have plenty of room to make it all work...



 
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