I'm looking to replace a 2V carb on a ford 302 with a tag that reads D3MF-EA with a suitable Holley unit. I can't seem to find the CFM rating for this unit. Any help? Thanks in advance.
There is a dimension in a circle on the side of the float bowl. Like "1.08" or something. 2100's came in 8 sizes from 190 to 424 CFM. 2150's are more or less similar. Mike From a Jeep site: .98=190 1.01=240 1.02=245 1.08=287 1.14=300 1.21=351 1.23=356 1.33=424 https://www.carburetion.com/CarbNumber.asp?Number=D3MF-EA
I don't know what CFM your original carb is rated at, but back in the day the 2 bbl Holley R4412 (500cfm), was commonly used as a replacement for the Motorcraft 2 bbl.
1960 Mercury 292’s used a Holley rated at 280 cfm. They used the same or close to linkage on the throttle side.
Autolite 2v carbs are excellent drivers , sure easy to tune to your needs . Manual and electric chokes can be had
I have done around 200 carbs for these folks. Great people. This is a 1.33" I did recently. https://www.ebay.com/itm/156005049804 Mike
Yeah, it was, but it's a terrible street carb. Those only exist because in some race classes that are limited to 2V carbs, they were a legal replacement. Holley priced 'em low for the racers too, much cheaper than the smaller OEM 'replacement' carbs they offered. They work great at WOT, but velocity through the carb and throttle response at low speeds sucks. I made the mistake of using one and lost 8 MPG...
I've had the opposite experience with a Holley 500cfm on a 302 2v [71 Mustang Fastback] Mine was extremely driveable and would alway start from dead cold , and soon as it came back to idle I could click it into reverse and back it out of the driveway.. I use to swap the diff head for 4.10's and do a bit of drag racing.[then swap it back later] The sleepy looking stock[ish] 302 under a big body Mustang could pull a 14.06 @ 96mph which was quite respectable back in 1980. But I still think a well setup Autolite is a better carb @alteredpilot 500cfm Holley's are flowing a lot less than advertised . The 2 barrel is rated at a different vacuum to a 4 barrel [SAE standard] so to calculate flow simply use the square root of 2 [1.414] A 500 Holley flows 353 CFM at the same vacuum as a 4 barrel
Here's another vote for keeping the Autolite. The one in my Willys has been a great carb for over 90,000 miles. Throttle response is just like EFI- I'm not kidding.
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