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Rochester 2G powerjet, Does anyone know anything about these carbs? I found one Im thinking of putting it on a 302 intake on my 270 GMC.

It is off a 56 Olds 88 324 230hp , It looks to be half of a 4jet with 2 floats

Is it junk or a decent carb? I know I will probably have to rejet ,but at first glance I think it might wake up the jimmy.

The Rochester 2G is a good carb, but find one for a Chevy 265. The Olds carb will run way too lean. Where do you plan to find a 2-BBL intake for the 270? Adapting a 2 BBL to a one-hole manifold is like trying to flush a toilet through a 2" pipe.
Jerry

I have a 2G for a 283 . This carb is completely different. its like half of a 50's 4 jet. Ive never seen one before. The 2G is probably the best option I know, but Ive never been one to follow the crowd. A powerjet kit and jets are available so it wont cost me much to try it. but if its a unrelible piece of junk I wont waste my time.

I'm going to get a 302 2 barrel intake.The carb will bolt right on it. I know a guy, and if he doesnt have one ,I have seen them pop up on ebay and craigslist fairly often.

I want a two ,1 barrel intake to use my zeniths ,but they are expensive and arent that easy to find for a GMC. 2 barrel wont look as cool but in the end will be easier to tune and will probably run better if i get it right.

Oddball-looking isn't necessarily good. How do you intend to correct the totally unsuitable jetting, CFM rating, and power enrichment system? Why do something completely wrong to begin with when much more logical and suitable options are available? Just to be different? My father was involved in field-testing the very first Rochester 4G carburetors to hit the market in 1953, and they went through some massive teething pains. It's entirely possible your oddball carb was an unsuitable piece of junk- - - -otherwise it wouldn't have been replaced with a more conventional carb after a short, unhappy life. Some of the fixes on the 4GC that Dad and a Rochester field engineer came up with in a little shop in Nashville Tennessee in 1953 became standard Rochester production line procedures in 54.
Jerry

The Rochester PowerJet was a transition (and not a very good one) from the early Rochester (1949, 1950) type AA (horrible), the 1951 BB (terrible, but better than horrible) and the 2G series which began in 1955 on smaller engines (wonderful). From memory (often a bad idea), the Powerjet was used only on some models of the 1955 and 1956 Oldsmobile on the 324.

In 45 years, I can remember selling maybe 3 rebuilding kits and zero of these carburetors.

(Opinion) if it is clean it makes a good doorstop (even if someone gave it to you).

Be very careful about kits. Yes, we do make them, and ours fit; but since Rochester referred to these as 2GC carburetors, some think the more conventional 2GC kits will fit, and they will not. The 2GC main metering jets will interchange; the power jets will not. And everything else (except perhaps body screws) is different.

(Opinion) MUCH better carburetors exist.

Probably the one saving grace, if you are in to this type of thing: since the carb is so rare, probably not 1 in a thousand car enthusiasts have actually seen one; you could open the hood at car shows, and roll out the old "it's an experimental carb that slipped out the door, and was replaced by the dealer at the first service". There are lots of gullible people that actually believe this story!

Jon.

Yes I want to do something completely wrong, because its different and oddball. I enjoy trying to make something work that wasnt intended in the first place. It might work , it might not. If people didn't experiment we would all be driving stock trucks. I agree there is probably a reason it was used one year but it could have also been because they were making the more common 2G at the same time. Thats why I ask questions because I don't know . Thanks for the story about your father I find things like that very interesting.

Thanks,that was great info. I guess I have a new door stop. I do know when to walk away. I might try it out for kicks and giggles, but will just use the more common 2G. I have used them before and have no complaints.

I do like the experimental carb idea. sitting back and listening to people argue they never made my oddball parts while its in front of them is cheap entertainment.