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A good running 440 will love a 750 DP. Your choice of makes. IMHO, anything less than a750 dp will cause your 440 to stumble and fall when you floor it, as it screams for more gas. scott

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Yeah, that's why the factory put a double pumper on every 440

IMO, a double pumper is a great way to waste gas on a street car.

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A good running 440 will love a 750 DP. Your choice of makes. IMHO, anything less than a750 dp will cause your 440 to stumble and fall when you floor it, as it screams for more gas. scott

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Yeah, that's why the factory put a double pumper on every 440

IMO, a double pumper is a great way to waste gas on a street car.

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DP's work awesome on the street. stay outta the secondaries and its no problem.
BUT if one wants the best carb for a STREET app.. its the CARTER TQ.

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TQ is a great street carb for the money. Best bang for your buck. But if you want something new/square bore DP would be my carb of choice. Every carb wastes a ton of gas once you get into the secondaries, regardless of whether it's got an extra pair of squirters back there or not.

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A good running 440 will love a 750 DP. Your choice of makes. IMHO, anything less than a750 dp will cause your 440 to stumble and fall when you floor it, as it screams for more gas. scott

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A good running 440 will love a 750 DP. Your choice of makes. IMHO, anything less than a750 dp will cause your 440 to stumble and fall when you floor it, as it screams for more gas. scott

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Yeah, that's why the factory put a double pumper on every 440

IMO, a double pumper is a great way to waste gas on a street car.

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How's that?? when they are tuned right they work better than any 750 on the market. Waste of gas and 440? like you're gonna run a 440 and expect good milage? As long as the carb is tuned it will do fine as soon as you crack the 2ndaries any carb is going to eat gas.
Stock 67 440's came w/ a 625, that's about as small as I'd go.

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The amount of misinformation on this board about carb sizing is staggering. Any performance carb will supply "enough gas" to mix with the air that can flow through the carb. The 500 cfm carb will support about 300 horsepower. That's using the rule of thumb of 0.6 hp per cfm.

Thousands of 413s ran millions of hours with two-barrel carburetors, pumping water and performing other industrial tasks. As I have said in a previous post my family car in the early '70s was a 2-barrel 455 olds which would run 90 in the quarter and would top out over 100 mph, the fastest indicated speed I ever saw was about 122 but the stock speedometer could have been lying too. (Growing up in North Dakota had its advantages in that there was hardly ever a cop around on the roads I drove.) The carb on that car was the larger Rochester two-barrel which I doubt flowed more than 375 cfm rated as a two-barrel carb, which would be about 265 rated as a 4-barrel.
Keep in mind also the thousands of dirt track racers using the Holley 4412 500 cfm 2-barrel, which would be 353 cfm rated as a 4-barrel.

Stick on a 500 instead of a 750 and you are leaving about 100 top end hp on the table. This power loss should all be above the torque peak. The car will run really strong until it "runs out of breath" which will be a disappointment but will not be accompanied by any expensive noises. Try it and see what you think. You can always buy a bigger carburetor later.

R.

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The amount of misinformation on this board about carb sizing is staggering. Any performance carb will supply "enough gas" to mix with the air that can flow through the carb. The 500 cfm carb will support about 300 horsepower. That's using the rule of thumb of 0.6 hp per cfm.

Thousands of 413s ran millions of hours with two-barrel carburetors, pumping water and performing other industrial tasks. As I have said in a previous post my family car in the early '70s was a 2-barrel 455 olds which would run 90 in the quarter and would top out over 100 mph, the fastest indicated speed I ever saw was about 122 but the stock speedometer could have been lying too. (Growing up in North Dakota had its advantages in that there was hardly ever a cop around on the roads I drove.) The carb on that car was the larger Rochester two-barrel which I doubt flowed more than 375 cfm rated as a two-barrel carb, which would be about 265 rated as a 4-barrel.
Keep in mind also the thousands of dirt track racers using the Holley 4412 500 cfm 2-barrel, which would be 353 cfm rated as a 4-barrel.

Stick on a 500 instead of a 750 and you are leaving about 100 top end hp on the table. This power loss should all be above the torque peak. The car will run really strong until it "runs out of breath" which will be a disappointment but will not be accompanied by any expensive noises. Try it and see what you think. You can always buy a bigger carburetor later.

R.

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Especially with that misinformation part..