Holley Carbs!

[Bobs69]

I'm looking to get a 750 double pump part# 4779.

Question is, I haven't decided on new or what.  Anyhow for fun looking at ebay and so forth.  Some have #4779C or #4779S  far as I can determine from the holley site the letter indicates the type of finish.  What if there is 0-4779c or 1-4779c  or something like that.  What the other set of number(s) in front mean?

[firefighter3931]

Bob, the prefix numbers just designate a series for that specific model carb. The lower numbers just mean the carb is chronologically older in age....the function will be the same. Make sure you purchase a carb with 4 corner idle. 

I really like the Proform double pumper carbs....lots of nice tuning features 



Ron

[Bobs69]

What is the benifit of having 4 corner idle?  What does it do?  Make it run smoother at idle??

What is Proform, is that a company that took a holley and improved on it like Demon?

[Ghoste]

Yes, and yes.  The answer to both questions is really about tunability and the improvements to it.

[Bobs69]

Allright, tell me what you think of this deal I found in the online classifieds.  Holley double pumper, 750, 4779.  Comes with Jet kit, extra power valve and an electric gauge.  $300 Canadian.

http://toronto.kijiji.ca/c-ViewAdLargeImage?AdId=89658683&img=http%3A%2F%2Fkijiji.ebayimg.com%2Fi3%2F02%2Fk%2F000%2F7e%2F35%2Fcb57_18.JPG

[Bobs69]

It's a 2 corner idle.

[Ghoste]

If you have the choice and all things being equal, the Pro Form and benefits like four corner idle are worth getting.  However, if you find a great deal on plain old vanilla Holley, you'll have to ask yourself how much money a four corner idle is worth to you.  We've lived with two corner a long time.

[Bobs69]

Ghoste, are you saying you own a 2 corner idle with a good ol' fashion Holley?  Is that carb a good deal (the one in the link?)

[Ghoste]

I have the old fashioned two corner idle, yes.  As for whether or not thats a good deal, I don't know.  My initial answer is a guarded yes.  It would depend on how boogered up it is inside.  Also, it's a while since I bought a carb new or used so I truthfully don't know how that one compares to a new or to a Pro Form.  Ron?