My son is rebuilding the carburetor on his '48-52 stock V8. The one main jet got a little messed up when we tried to remove it. From what I can find the Ford part number is 8RT-9578. I've been calling around and searching on line to find a set. I checked Mac's and they have jets listed for Strombergs that don't look anything like the ones in this Holley carb. I punched the number into the NAPA on-line store and they have 5 pages of listing with pictures. Some of the pictures are very detailed with a "56" or "58" stamped on the part and some listing don't have images but list ".071" or ".075". The stock jets in the carb have "50" on them. The live person we talked to at my local NAPA is having trouble narrowing the part number down. He said they start at the high 30s and go up to the low 60s.

Anyone have exact part number for a 50 jet?

I wouldn't think this would be a hard part to find.

 

Stock for a V8 was #51. I think I have a couple, let me check. I almost certainly have a #50 if you want to burn the valves tho....

 

My book lists:
.051" - 59A-9533-A
.049" - 59A-9533-B
.047" - 59A-9533-C
.045" - 59A-9533-D

9587 comes up as a choke lever spring. Hope this helps.

 

I have a pair of brand new #49's and a pair of brand new #52's, nothing in between. Vintage Speed has the correct jets, Charlie Price's Vintage Speed | World's largest supplier of 50's – 60's Style Hot Rod fuel systems

Check eBay too.

 

Thanks Ross. The ones that are in the carb have "50" on them. The carb isn't the one for this engine, the engine didn't have one when we got it. The carb was from a parts truck I had some time ago. Why would it have 50s? Closer to sea level?

Nathan, I used the 8RT-9578 number on the NAPA site and came up with 5 pages of jets, I plugged in the "59A-9533-A" number and got "0". When I Googled the number I found references to '57 and '58 trucks.

 

This is a Holley 94, isn't it? Does it have a port for the vac advance on the back of the carb? Some Ford applications may have had a #50 (cars most likely), it may be off a different brand car, or someone may have changed it. Lower jet # = higher altitude. You're down so low only the Dead Sea is lower, stick with #51's.

Be careful when looking that you don't get jets for a 4-barrel Holley, they are bigger threads. Not sure they go down as low as 50 anyway. 94's use 1/4" thread

 

Ross, thanks for the link, he has a sh**load of them. I also found them on eBay, why I didn't think of that I don't know.

Now my doofus kid told me the jets have "51" stamped on them, this morning I am sure he said "50".

Thanks for the help guys, again, FTE to the rescue.

 

The carb we're using does have the vacuum port but now you have me asking another question. I have another carb, same exact looking carb externally but it does not have the vacuum port on the back. What were these used on? I remember getting this carb at an auction. I bid and won a box of Ford parts, one was a carb but after I got it in my hand I saw it was for a car. Just as I was about to leave a couple of guys came up to me and asked if I'd swap carbs, the one they had won had the truck throat on it so I was happy to swap carbs.

 

Is this other carb cast with a Ford logo? If it just has Holley markings, it is likely either off an IH, some other vehicle, or is a "universal replacement" carb. 94's are kind of like flatheads, parts interchange among so many models/years that after a few trips thru the rebuilders, it's hard to tell what they are. 94's were sold for an upgrade on VW Beetle engines, for the 6-banger Fords, lots of things. Only OEM Ford models had the Load-A-Crapic port, tho.

 

The carb has the Ford script on the side of the bowl. There is also a sticker just under the throat opening that looks like it could have been a rebuilder's tag. It's faded and I can only see a very faint part of a red circle.

 

Check on the bowl for a cast-in number; could be 13/16, 1-1/16, something like that.

 

my 40 ford 1 ton has the same carb as my 50 merc but with out the vac port.could that carb be for the crab dizzy engines.

 

I suspect as much, in which case it should be a 13/16 carb. Did the earlier trucks use the beveled air cleaner mounting neck on the carb?

 

The only characters I have found on the bowl is the Ford script, a raise "H" and the number "2" stamped on one side. On the opposite side there is a raised circle with "Model 50" inside cast into it. I can't find any other markings.

 

Ross i would have to say yes as both my air cleaners are the same.on the merc it has "94" on the bottom by the two adjusting screws but i can recall whats on the 40 ford carb.