Does anyone run one of these with a offy C series intake? My one barrel has been rebuilt and continues to give me problems so I am going to be looking at replaceing it shortly and happen to have one sitting on a shelf.

 

Try it and post the results.

 

Yes, please post the results, Joeseph! Previously, someone wrote that they had installed the 38/38 Weber. He was using an adapter rather than an aftermarket intake manifold. In that thread, it was mentioned that the 32/36 was too small for a 300 [4.9L]. Most guys are looking for more power, but I have wondered if the 32/36 could be a suitable replacement for the Carter YF if one was looking for economy with an otherwise stock engine.

I have seen posted that the YF has 190-210 CFM. Does anyone know what the CFM rating of the Weber 32/36 is?

 

I think that this one is about 270cfm roughly? I am not entirely sure It worked great on my toyota lol, I just can't afford to spend $300+ to keep this thing running I have been using it as a DD and it needs to keep rolling or its gonna go out old yeller.. That carb not the entire truck lol.

 

IIRC, the 32/36 (aka Holley 5200) is 240 cfm.

 

I am woudnering if i can re jet it to make it larger...

 

haha my carb is so bad someone went and slapped a "Got boost" bumper sticker on my tailgate...

 

I asked this very same question on fordsix.com and there was a guy that responded and said it makes for a very driveable combo. He didn't really want extra performance, just a good running truck. His claim was 13-18 mpg and really smooth driving capability. He used a stovebolt adapter and then just tuned it for economy.

 

I have three of these carbs. Just put one on a 2.0L four. They are considered the replacement carb of choice by the English fans of the old Ford Fiesta Mk1, with 1.3 or 1.6L fours. The Formula Ford racers use this carb on a 1.6L engine. The quite similar Holley 5200 came on old Pintos.

I would think it rather small for a 5.0L six, but if you don't care about power in the higher part of the rpm range, it would surely give you good low-end throttle response.

But would it work on an Offy C? Somebody (Abandoned Bronco?) recently posted a photo of an Offy C, and a drawing showing a big ridge in the floor of not only the plenum but well along the port. I believe that manifold was intended to take a 4bbl spreadbore, with one primary and one secondary throat on either side of the ridge (floatbowl forward). I don't think you want to put your Weber straddling the ridge with the primary on one side and the secondary on the other, which is likely to leave cylinders 3 and 4 (and probably 2 and 5 as well from the look of it) relatively starved at low rpm and over-fed when the secondary tips in. Alternatively you could put the Weber with both throats directly over the ridge, but this still could give you considerable cylinder-to-cylinder mixture differences.

I like the carb, like the engine, like the manifold, but the combination doesn't seem very good. But hey, try it.

 

Interesting, smitty.

Unless someone took a grinder to my C, the plenum divider directly under the carb is only ~1/4" above the floor. That 32/36 is progressive, but the mismatch from 3-4 to 1-6 couldn't be any worse than the stock log, right?

The 2-bbl plate I got puts one bore on either side of the divider. I'm going to try a 2150, not progressive so no worries. Maybe orient the 32/36 like a DP with the throttle shaft parallel to the plenum divider.

 

"I am woudnering if i can re jet it to make it larger..."

The jets have nothing to do with the size of the carb. A jet change is only necessary to match the gas flow with the air flow for a correct, driveable AFR.

 

Well I just started cleaning up my grandpas place to haul most of the scrap being as I need the money and my grandmother needs it gone an I have already found a motorcraft 2 barrel not sure if its a 2100 or 2150 but its missing the choke, a 79 ford with a 460 that has a 600 holly and a spare 352Fe motor with a 650 double pumper on it so I am gonna hold off on the Weber being as I have only cleared out one shed and have absolutely no idea what all he had before he passed. Plus the addition of power steering and brakes at minimal cost is pretty sweet.

 

I installed a 38/38 synchronous weber on my '80 F-100 using an adapter supplied in the weber kit. I plan to install an offehauser intake later when money allows. Even with the stock restrictive intake I noticed a huge difference over the pile of crud factory one barrel. The gas mileage stayed the same as before, but the performance increased dramatically. The usable rpm range seemed to increase both on the low end and upper end (I say seemed because I have no tach). Overall I am impressed with the weber.

 

Care to elaborate on exactly it took for you to install it on the stock manifold?

 

Baron, the closest I've gotten to an Offy C is that photograph, so maybe i should have made my speculations more tentative-sounding. I still think that little progressive Weber is on the small side, but then I don't know the Cfm rating for the stock 1bbl carbs. AB says he is getting good results with (if I recall) a 600cfm Holley 4bbl (on an Offy C), which seems enormous to me for reasons I bored everyone to death with on one of AB's threads.

I'd think the effectiveness of any particular carb/manifold combo has lots of variables itself, and relates to a lot of other variables in the engine. As you are getting at, when locating a little 2bbl carb atop a big square hole made for a 4bbl, you could probably move the 2bbl all over the area of that big square hole and watch the changes in mixture distribution to each cylinder. And the most even distribution would probably come from a carb location that was off-center in both directions and looked funny!! Then if you tried different thickness spacers under the carb, and spacers with two holes or one big slot, your torque band would change again and probably the mixture distribution as well.

If you're racing, you have to find this out (with an O2 sensor in each tube in your headers). For the street, maybe not, . . . unless the mullahs take over in another country or two in the Mideast, and gas goes to $10 or $15 a gallon, in which case all of us here are going to become real fanatical about tuning for best fuel efficiency, and using every trick we can think of!!