FAQ: What Is Better A 454 Throttlebody Or A 454 Carburetor?

What is the best carburetor for a big-block Chevy?

Holley’s vacuum-secondary 850 (PN 0-80531) makes a good street carb for a Chevy big-block and can deliver the goods on a 750-horse engine if correctly used! Throughout this book, the theme is achieving the best from your Chevy big-block by getting everything just right.

How long will a 454 engine last?

Engines older than 1997 need oil with zddp. Newer engines don’t need it so most oil dosn’t have it. 454 will run 200k with the right oil.

How much horsepower does a fuel injected 454 have?

The 454 EFI version was rated from 230 hp (172 kW) to 255 hp (190 kW) and from 385 lb⋅ft (522 N⋅m) to 405 lb⋅ft (549 N⋅m) of torque.

What cfm carb do I need for a 454?

Because the 454 is less efficient, it doesn’t need as much cfm, so a 750cfm carb would be fine while a 650 cfm carb would be too small.

What happens if your carburetor is too big?

If the barrels are too big, the loss of air velocity means the cylinder will not fill to its full capacity. An engine with a carb that is too big will put out less Torque and Horsepower. It will be difficult to drive due to poor low-end torque. If you drag race your car, an oversized carb will produce slow 60 ft.

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Are 454 engines reliable?

Re: Reliability of 454 I have found them to be very reliable although I haven’t had one with more than 45000 miles on it. They do tend to run a bit warm but once you find the “normal” for your unit and keep the coolant clean and properly serviced you should have no trouble.

What kind of gas mileage does a 454 get?

The 454 is a big-block carbureted engine found in most older model Chevrolet cars and trucks. The engine uses eight cylinders to provide high-end torque and speeds. The combination of larger bore and eight cylinders equates to very poor gas mileage. The engine runs an average of 10 to 15 mpg.

Whats better 455 or 454?

A 455 Pontiac will bolt right into your ’74. It’s a better engine than the 454: more torque, faster on the street, more reliable, and it will appear to be the stock, original engine.

How many liter is a 454?

For many years the 454 ( 7.4-liter ) V8 was the top choice from GM, while Ford had the mighty 460 (7.5-liter) V8.

How much horsepower does a 1975 454 have?

a 454 with 450 horsepower.

How fast is a 454 SS?

The 1993 Chevy 454 SS could cover a quarter-mile in around 15.7 seconds, reaching speeds of 60 miles per hour in around 7.1 seconds. While the Chevy 454 SS line offered high power output, they were not the most efficient vehicles when it came to fuel consumption.

How much horsepower does a 1987 454 have?

The 454 V8 engine in 1987 produced 230 horsepower and 385 ft. -lbs. of torque. When discussing automobile engines, torque refers to the total amount of work that an engine can perform, while horsepower is how quickly it can perform that work.

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How much does a 454 SS cost?

A 1991 Chevy 454 SS pickup in #2 condition has an average value of $23,700 in #2 condition. By comparison, a 1991 Syclone in similar condition is valued at $33,100, while a comparable 1992 Typhoon is valued at $28,400. Both GMCs have #1 (concours) values of more than $40,000.

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