Is a 750 cfm carb too big for a 302?
Its either the jets are too big or if its a Holley it could have a blown power valve or it may be leaking gas from the floats being set too high. In general, if you take a 750 cfm carb out of the box and bolt it on a 302 it may need to be rejetted down some but not always.
Is a 650 cfm carb too big for a 302?
Yep, 650 is too big for a street 302.
Is a 600 cfm carb too big for a 302?
A 600 cfm Edelbrock is fine for a 289/302. If you have any kind of aftermarket cam or other mods, read your plugs in a couple hundred miles.
How do I know what size carburetor to get?
To arrive at the most appropriate carburetor choice, there’s a basic formula: engine displacement multiplied by maximum rpm divided by 3,456. For example: a typical 355ci small-block—a 0.030-over rebuild—with a 6,000-rpm max engine speed would work well with a 616-cfm carb ((355 x 6,000) 3,456 = 616.32).
Does a carburetor add horsepower?
After you fix what’s limiting performance, an Edelbrock Performer intake can add as much as 10 HP. The FAQ forum is a good place to ask questions. There are differences between engines and performance improvements.
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.
Does a bigger carburetor mean more power?
The answer is no, not really. The amount of fuel that’s sucked into the carburetor is controlled by the carburetor jets. Installing a bigger carb is simply going to improve the power potential of your bike. You still have other things to worry about like improving air intake, exhaust flows and jets.