When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Anyone know if a carb for a '77 Bronco will work on an '84 F250 w/ 5.0L?
My truck has a UREMCO 7-7551 on it (which their site says is for a '77 Bronco), but their application guide says the carb that belongs on the truck is a 7-7796. I can't find any detailed info on either carb such as CFM or jet size, etc. so I don't know if the one on the truck is sufficient for the engine or not...
I have no idea what carbs you are talking about. I understand "Motorcraft 2150" and the various Venturi sizes for it, but not UREMCO. Can you tell us what brand and model carbs you are talking about?
I have no idea what carbs you are talking about. I understand "Motorcraft 2150" and the various Venturi sizes for it, but not UREMCO. Can you tell us what brand and model carbs you are talking about?
Well I know the truck should have a 2150 on it based on what I'm seeing in the manuals. When I rebuilt this carb a while back, when I was searching for kits, all the parts stores needed an original carb number. I saw that this was a reman carb and it still had the reman tag on it with the companies part number.
United Remanufacturing is the company and the part number on this carb indicates it's for a '77 Bronco.
They list an entirely different part number for an '84 F250.
I hate assuming, but both carbs must at least be a 2150 but I'm not sure if there are other subtle differences between the Bronco carb and the F250 Carb such as jet/venturi sizes, etc.
I think the issue I'm having is carb related because I had a similar issue on my '69 Lincoln which ended up being fuel starvation from too small a jet. I get good acceleration in 1st gear but crap for power in 2nd and 3rd.
I doubt any of us know boo about the UREMCO #'s, so quoting those won't help. As for '77 Bronco vs '84 F250, did both vehicles have the same engine? A 302 would have different jetting than a 351. And, if the F250 has a GVWR above 8500 lbs is might not have EGR, which makes a big difference in jetting. So, we need a lot more info to be able to provide advice.
If you can give me the calibration code on the engine I may be able to give you a carb part number. That won't tell you what jetting the carb had, but it might help.
I doubt any of us know boo about the UREMCO #'s, so quoting those won't help. As for '77 Bronco vs '84 F250, did both vehicles have the same engine? A 302 would have different jetting than a 351.
Good question, but I don't know. According to the carb site, the Bronco carb was for a 5.0L and so to is the F250 Carb, so should be same engine size between both.
I called them this morning and the only thing they could tell me is that the Bronco carb may have bigger jets than the F-250 carb which could cause a rich running condition but that's about all he could offer.
Originally Posted by Gary Lewis
And, if the F250 has a GVWR above 8500 lbs is might not have EGR, which makes a big difference in jetting.
Mine is under, and does have EGR, which does not appear to be hooked up.
Originally Posted by Gary Lewis
If you can give me the calibration code on the engine I may be able to give you a carb part number. That won't tell you what jetting the carb had, but it might help.
The calibration code is on a sticker on the front of the right-hand valve cover, as shown at the very bottom on this page: EGR Valves - ???Gary's Garagemahal
Unfortunately there is only a small piece of the sticker left and it is completely illegible. I'm wondering if the shop manual has any specific details on the carb such as stock CFM and jet size that I could use to compare to that of the Bronco.
No, the shop manual doesn't have that info. At least, the 1981 factory shop manual doesn't have it for those trucks, so I doubt the 1984 manual would.
But, we may be able to figure out what the carb # is, and from that figure out what the jetting should be. Here are the two pages from the master parts catalog that show the calibration parts list #'s for various vehicles. If you can figure out which one yours is, then I can use that # to find the carb #, and from the carb # I can find the jetting.
So, you need to know whether it is 2wd or 4wd, what transmission you have, and whether it has CA emissions, the high-altitude package, or the 49-state emissions.
Here's an example of a calibration parts list. Notice that these two use carb E4TE-AMA.
I think M/T is probably the same as 4/M/T since I don't know of a 3-speed manual in these trucks. But 4/M/T/OD is a 4-speed where the top gear is an overdrive. Not a 5-speed.
But, we may be able to figure out what the carb # is, and from that figure out what the jetting should be. Here are the two pages from the master parts catalog that show the calibration parts list #'s for various vehicles. If you can figure out which one yours is, then I can use that # to find the carb #, and from the carb # I can find the jetting.
That is interesting. I didn't know the parts catalog had that information.
Gary, would you tell me what the correct jetting is for:
Calibration code: 4-54L-R10, Parts list #: 375
Calibration code: 4-54L-R11, Parts list #: 408
Calibration code: 4-54L-R12, Parts list #: 421
Rick - All three are for a 302 C.I.D. (5.0L) in a 1984 F150/250 — AOT-exc. Calif, or Hi-altitude carb.
Here's the info on CC #375. You will see that it calls for carb E4TE-AKA and Component Parts List 95.2AJ, as do all three calibration code #'s you gave. But, I've put a note in that says E4TE-AKA doesn't exist in the catalog and maybe it meant AFA. See the next pic for why.
Ok, here we see Component Part List (aka Carb. Parts List) 95.2AJ. Notice that it says it is for carb E4TE-AFA. And it doesn't list AKA. In fact, the letters AKA do not appear in the 95.2AJ listing, anywhere. So, if this is correct you need two #49F jets. But, keep reading as the plot thickens....
So, let's take that same theory of catalog usage to the Fuel Enrichment Valve - AKA power valve. Here's the entry for that. But, notice that the AJ entry doesn't map to a E2TE-AFA (much less AKA) entry. In fact, the E2TE-AFA entry matches up with 95.2AB, AC, AF, and AL carbs.
So, do I want to tell you for sure that those three CC's take 49F jets? No way, Jose! But, that's what the catalog seems to say. Perhaps Bill will come along and straighten me out?
As long as I have had my truck, it has never had the factory carburetor. I do know that it originally had a Motorcraft 2150 2V with a 1.08 size venturi. So, I upgraded that to an Autolite 4100 4V with a 1.08 venturi. My thinking was that if I stayed close to what Ford originally designed for my vehicle, the carburetor would likely run great with very little adjustments.
My current jets just so happen to be - you guessed it - 49F!
It's good to know that I am at least close to what Ford was doing at the time.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
