Buy Holley 0-4779C Model 4150 Double Pumper 750 CFM Square Bore 4-Barrel Mechanical Secondary Manual Choke New CarburetorHolley 0-4779C Model 4150 Double Pumper 750 CFM Square Bore 4-Barrel Mechanical Secondary Manual Choke New Carburetor Product Description:
- Mechanical secondary dual accelerator pump for additional fuel under initial acceleration
- Dual feed fuel inlet with mechanical secondary type
- Dichromate finish with center hung floats
- 4-corner idle system for precise control
- 100-percent wet-flow tested and calibrated for street drivability
Product Description
This carburetor features dual metering blocks, power valve blow-out protection, dual feed fuel inlets, and dual accelerator pumps to allow fine tuning of the secondary jetting. The manual choke is used for easy control of engine warm-up and a center hung float is also included. This carburetor is calibrated for gasoline.
Customer Reviews
Most helpful customer reviews
1 of 1 people found the following review helpful.
The Real Deal For Single Carb Small Block Performance
By alexanderaku
The Holley 0-4779C Model 4150 is the carb coveted for circle and road track due to the center hung floats, but it also makes an exceptional street carb when mileage isn't so much of an issue. No less is the four corner idle system that makes idle tuning much easier on this carbs two metering blocks and each throttle bore feed - no wimpy metering plate as found in lesser Holley models and "fixed" idle air system for the rear barrels, which can cause a ragged idle from the rear throttle bores. Holley also includes blow-out protection in this one for both power valves. The "C" in the model number is for CLASSIC - like in the day, 1960's auto dealers touted "Race on Sunday, Sell on Monday" - knowing a win at the races on Sunday meant they would be having increased sales of the same style that won come Monday. This carb is also a perfect replacement for many in GM's hot car line-up of those days - like the 327-350 cubic inch "330-375 Hp" models. Target RPM range will be 7000 with this carb and these engines - but don't go there without a properly prepped bottom end, heads, and valve train system. 7000 RPM is race engine territory that few OEM built engines can reliably withstand much of.If you have better than a 5-liter engine, this 750 CFM carb is a good starting point for upgrades - and much higher horsepower levels than stock. This one also has the air bleeds in the air horn calibrated for 350-400 cubic inch rides - important as big blocks and two-four setups require different air horn bleeds. Just make sure your fuel lines and fuel pressure system is up to feeding it what it needs.The front and rear power valves can be easily replaced by removing the bowls - important if you have changed the engine vacuum with a larger duration camshaft profile - along with that compression increase you probably needed. This 750 is easily capable of supplying proper fuel calibration in the 400 horsepower range - if you have the needed changes in your engine.What you also get is Holley's famous float adjusting system for adjusting bowl levels, and front and rear jet changes are quickly made by removing the bowls. One thing, this is a performance carb, but it isn't for an all out drag car without changes to prevent starving and flooding fuel bowl level changes under severe acceleration - but it can be modified for extreme use. Even the carbs fuel pumps can be adjusted. This model is an "easy tuner" for the experienced old school "Bad to the Bone" racer.The manual rear barrel linkage means you don't have any wimpy vacuum lag opening the rear barrels when you hit the accelerator - the engine has what it needs instantly, and it's not for fuel mileage! The choke is manual, but you can still upgrade that to electric if wanted.I installed my Holley 0-4779C Model 4150 Double Pumper 750 CFM Square Bore 4-Barrel Mechanical Secondary Manual Choke New Carburetor on a stage two built blueprinted 355 CI Chevy in a '55 Buick Special 2-dr. The engine has port matched gaskets, Edelbrock Victor Jr. CNC intake and CNC Brodix Track 1 heads for starters - and makes 468 horsepower! There's a big difference in this car from the old nail-head it came with! Heavy Buick? Yes, just like the platform it shares with mid-'50s Chevy rides. You've just got to love the Buick's factory "bullet hole" fenders - remember Broderick Crawford in "Highway Patrol" with his Buicks. I'm sure he would have liked to be behind the wheel of this one.
2 of 4 people found the following review helpful.Awesome Carb!
By Andrew P. Vargo III
This was my first Holley purchase. It went on a Chevrolet 350 in a '64 Nova SS. After I had the carburetor dialed it and my local hot rod tuning shop, it works flawlessly!! Great quality, well built, easy to modify. If your engine is over 400 horsepower this is the carburetor for you.
0 of 2 people found the following review helpful.holley 750 double pumper
By bigdaddydog
put this carb on my 69 chevelle on a 350 eng bored 30 with dart heads and it runs great. give it the gas and hold on!!
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