I know some of you have changed from the original carb to a knew carb. I was thinking of putting a new edelbrock carb on my 312 which was bored 60 over and a higher lift cam. The motor is in my 1957 skyliner Which one would be best for my motor and would I have any trouble fitting it? Im thinking of trouble with throtel linkage. My original carb is now working right and I don't want to throw any more money into it.
IMHO from experience, the Edelbrock carb works nicely on the Y block. You may have to do some playing around with the original air cleaner to make it fit.
Jay, aren't there different carb patterns on early 4v/later 57 4v intakes?
to the best of my knowledge, only the later intakes will take a 'modern' pattern Holley/Edelbrock. Please somebody correct me if I'm wrong.
Quote from: djfordmanjack on 2017-07-02 17:43
Jay, aren't there different carb patterns on early 4v/later 57 4v intakes?
to the best of my knowledge, only the later intakes will take a 'modern' pattern Holley/Edelbrock. Please somebody correct me if I'm wrong.
You are correct, the early ones have the small pattern and also smaller ports I think. Also the E code dual four manifolds use the small pattern.
Quote from: hiball3985 on 2017-07-02 18:04
You are correct, the early ones have the small pattern and also smaller ports I think. Also the E code dual four manifolds use the small pattern.
X2 what Jim just stated.
The 1957 four barrel has the large (spread bore) except the dual 4 bbl which had the small 4 bbl bolt pattern.
The bolt pattern on mtwilsonboy's engine would have to be the wide bolt pattern for the Edelbrock to bolt onto it.
If you have an original Holley or Autolite now a new Holley would be the easiest.
390-550 cfm will be best as the stock carb is 410 cfm. Skyliners are heavy and it is easy to over carb it.
To use an Edlebrock requires a number of changes. Not worth the grief.
Goodluck,
Ron.
Quote from: mtwilsonboy on 2017-06-25 07:00
I know some of you have changed from the original carb to a knew carb. I was thinking of putting a new edelbrock carb on my 312 which was bored 60 over and a higher lift cam. The motor is in my 1957 skyliner Which one would be best for my motor and would I have any trouble fitting it? Im thinking of trouble with throtel linkage. My original carb is now working right and I don't want to throw any more money into it.
If your original carb is working right as you state, why change it? I would also stick with the Holley if you do. For me they are simpler to tune and rebuild compared the the Edlebrock, linkage etc should be easier too.
Many 312 D code automatics used originally a Carter AFB which is essentially an Edelbrock, they bought the rights from Carter. I don't know the CFM. Oddly they have a built in dashpot. Work fine.
My 312 has the Carter AFB and I can't wait to get rid of it. I'm in the process of cleaning up and rebuilding an Autolite 4100 to fit to it - much simpler carb than the Carter or Edelbrock.
I have 3 312's that I run Holly street avengers on, as of now not a problem, and they get a lot of miles every year.