Dec 11, 2008 · Took some measurements of my Holley 750 double pumper that I got off of ebay. here are my findings: Idle air bleeds primarys .076 secondarys .068 high speed air bleeds primarys .030 secondarys .030 Idle feed restictors .031 Main Jets primarys .074 secondarys .080 with jet extensions...

Feb 20, 2008 · I have a holley 4779 750 dbl pump that i'm in need of some help with. I bought the carb used, put a rebuild kit in it and bolted it on. The carb has always ran fine, idles about 900 rpm with a nice size cam, and runs down the road just fine. Only issue ive ever really had is the rich idle which many seem to have.

Jun 20, 2012 · I have a Holley 750 List 4779-3. It is about 20 years old It still runs great, but is starting to leak. I have never rebuilt one myself, but I think I am going to give it a try. I have replaced power valves, jets, set floats etc. My questions are: Should I …

Jul 18, 2010 · Holley 4150 vs. 4779 Jump to Latest 6.9K views 11 replies 10 participants last post by ShouldntBeHere Jul 20, 2010

Oct 15, 2007 · Every list I find for factory jets lists carbs 4779-1, 4779-2, 4779-3, etc. But in summit or holleys website they just list carb number 4779c. What number does the "c" represent?

Mar 31, 2009 · Straight from the Holley numerical listing website, page #3 for a 4779. (Not a 4779-1, or a 4779-2.....just a 4779 as the original poster said he had) Click here>>>>>Holley numerical listing information Says a 4779 has 75 front and 76 rear with a 8.5 PV.

Jul 12, 2009 · Well for years my DP 750 holley what i thought was a 4779 turns out to be 6109 tunnel ram carb after Rickster looked up numbers in holley book!(thanks Rick) I was running 76 primary and 84 sec. jets on 9.8 to 1 327 with vic. junior …

Oct 14, 2004 · i have an old rebuilt holley 750 dp # 4779. according to holley it requires 75p and 76s jets with a 8.5 powervalve. why is it that all the 4779-1 thru 4779-8 carbs run 70-71 primary and 80 secondary jets? is there an internal difference in the carbs that require that bid of a jet change? also on a mild street 454 how much of a difference would there possibly be between a hp 950 and the same ...

Feb 26, 2014 · The Secondary Venturi Diameter of the 4779 is 1 3/8" the Secondary Venturi Diameter of the 4780 is 1 7/16" everything else is essentially the same with minor changes in jetting from one variation to another such as 4779-3, 4779-4, 4779-5, etc.

Jul 3, 2004 · After my engine dyno I was able to get better performance out of a Holley 750 DP 4779. Since I need to get another Carburetor how would a SPEED DEMON 750 BARRY GRANT Mechanical Secondary part# 1402010 compare to the Holley 750 DP #4779? Have anyone done any apples to apples testing of Barry...