This is a 1977 Holley/Weber 5210. It is found on 1970's GM 4cyl. cars and mostly on Vegas. The 5200 is the Ford version of this carb. The Weber version is a 32/36 DFEV or 32/36 DFAV. The 5200/5210 have a flow of 280 CMF
I was lucky enough (I quess) to get the throttle mechanism off the vega. I modified this to work with my setup.
I tracked my 5210 down to coming off of a 1977 Vega. I found this info out of a Chilton Auto Repair Manual 1975 through 1982.
The 5200 is considerd a Ford Autolite Motorcraft Carb.(at least in this manual). From 1975-1981.
The 5210 is considerd a Holley as is the rest of the numbers below.
The 5210 included AMC 1977-1979.
GMC Chevette 1979 and 1980, Monza & Vega 1975-1978, Starfire 1976-1978, Astre, Sunbird and Ventura 1975-1978.
Numbers below are more electronic.
The 5220 is a 1978-1981 Chrysler Omni/Horizon version.
The 6500 is a 1978-1981 Ford Pinto/Bobcat.
The 6510 is a 1978-1981 GMC.
The 6145 and 6520 is a 1981 Chrysler.
Well, when I first started on my 82 Dodge D150 truck with 225 slant six; I was getting less than 10mpg. My first move was to replace the 1945 Holley for a 1920 Holley. Which, you probably have already. I then started looking for a bigger carb. Found a Carter YF off of a 300 Ford six. It fit straight on and I only had to mess with the linkage. An air cleaner off a BBD fits nicely. I really liked that carb, it had a nice response. Plus, it had an electronic choke. Not like that choke on the 1945 or 1920. I do mostly city driving and was getting 10-11mpg. My best for this carb was 15mpg.
Then I started reading about the 5200 Holley/Weber. Better performance and mileage, I have to try that! This was a more complicated swap. I went and found a Vega 5210 progressive carb. It�s the same as the 5200, just the GM version. I did get an electric choke from a Pinto that fit. Found an adaptor at stove bolt that was a decent price.
The 2bbl intake is better for performance and mileage. The 2bbl intake has a much better flow than the 1bbl intake. I only had the 1bbl intake and made do with that. I still had better gas mileage and power over the 1bbl carb.
The way I have my carb set on the intake manifold I had to cut about a 1/8 of an inch off the studs. This allowed the adaptor to sit flush on the intake manifold spacer. I used the throttle mechanism from the Vega to help me hook up the gas cable and the auto kick down. I have a 904 auto. If you have a stick it�s not as big of a deal. Just hook up the gas cable. Now I get 11-13mpg city.
I heard that there needs to be a change in the main jets from 180 to 170. This helps on fuel economy, but also reduces performance. I haven�t done this. I just rebuilt the carb to the specs of the Vega. She runs real fine! I do need to increase the size of the exhaust to 2 �in. all the way back through a turbo muffler. This also helps in performance and mileage.
If you have seen the "Frankenstein Exhaust" page then you know I have a 2 1/4in. exhaust put on. After putting on the exhaust my 5210 Holley wasn't performing very well. I decited to put my Carter YF back on. Now it runs great again! I guess the combo of the 1bbl intake and the larger exhaust didn't let the 5210 Holley perform like it wants to. I bet if I had a 2bbl intake it would have been fine, maybe even better.
Changing out the intake to a 2bbl intake will have to wait until I need to take the intake and exhaust off. I'm not a big fan of messing with slant6 intake and exhaust manifolds. In fact, I feel they are a big pain!
Well, til next time "ROCK and ROLL!"