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Carbs 216 vs 235

K

Kens53chevypu

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I've waited a lifetime to enjoy rebuilding this pickup. At 57 I feel like a kid in a candy store and I can't get enough! As a beginner I've relied heavily on reading all the articles in this truck forum and looking through catalogs for CD, Long Motor Corp, GS. I've tried to keep it as stock as possible. As I get closer to putting it back together I'm realizing I goofed!

I bought two rebuilt Rochester carbs from CD with the intention of putting them on a Offy dual intake manifold on a rebuilt 235 engine with a mild cam from Patrick's. I've recently read that there is a carb for a 216 engine and a carb for a 235 engine.

Chevy Duty - What do I have?
If I have carbs for a 216 are they going to work for my 235 engine?

If I need new carbs - where can I purchase two that come with an automatic choke?

Thanks
Ken
 
Ken, don't take this as gospel but I think you can put 235 bases on you 216 bodies. The differance was in the base and throttle plate size. The studs will be too far apart if your Offy is for a 235's and carbs are 216. As far as automatic chokes, order them for a CAR up through 62. The cars went to them in the fifties.
 
Yes, the major difference in 216 and 235 carbs is the base (throttle assembly). Although, there is a difference in the size of jet, also. I suppose you will probably re-jet them anyway, since you will be running 2 of them. Just something else to be aware of.
 
RE: Rochester Series "B" Carbys

I'd not be wanting an automatic choke , you'll only need a choke on _ONE_ carby anyway .

CD sells good rebuilts , I installed on on Lon's truck .

It is _critical_ that you take your carbys apart and make sure all the jets are the same , they'll be stamped .

-Nate
 
RE: Rochester Series

I want to Thank Everybody for their replies!

As it turns out CD has confirmed that I did buy two 235 carbs. I did have someone look at the jets before I had my carbs painted.

Nate - Patrick recommends carbs with automatic chokes. I live in the Northeast where it can get down to 30 at night before a fall car show. Someone up here told me not to get them! Time will tell!

Why are they called "B" Series? Are they related to the Rochester 94?

Thanks Again for all the great recommendations!

Ken
 
RE: Rochester Series B

I am not sure why , they replaced the older ##### W-1 carbys and are better (IMO) , they used Rochester B , BC , BV and so on carbys on the 6 cylinder engines unhtil they dropped this magnificent engine in 1981 . (Ford kept theirs untill 1986)

The reason you want a manual choke is to reduce or prevent fuel / oil dilution ~ with a manual choke you can open it as soon as possible then use the hand throttle to keep the engine idling during warmup .

I guess an auto-choke properly adjusted and operated will work just fine too .

Remember : when equipped with auto chokc you must never _EVER_ touch the throttle whilst cranking the engine ! pump to floor _once_ and release before turning the key ~ this injects some fuel and sets the choke flapper valve and fast idle cam .

Touching the throttle whilst cranking upstes this and causes hard starting although I see where eveyone seems to love pumping the throttle whilst cranking - it never helps in any case , _ever_ .

Period .

' you canna change the laws of physics Jim ' .

Rant over (for now!)


-Nate
 
RE: Rochester Series B

Hey Nate-

Not that it matters, but Ford kept their venerable 300 Big Six until 1996. I had one of the last '96 F-150's with it. Great engine.
 
RE: Big 6 Engines

It does matter , that's cool . I wasn't aware of that .

GM offered the 292 engine into the late 80's on export build trucks , lots of C-50 etc. went to third world countries with them .

-Nate
 
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