carb suggestions for a 445 fe

[Danr55]

Good formula for figuring what size/flow carb to use on your motor is to multiply the max RPM you'll run by the engine displacement in cubic inches and divide by 3456. That will provide the approximate CFM rating you need for your engine. You can go from there to determine which one to use.

[wrench87]

danr55, if you use that formular it puts me in the 790 range wich would be 750-780. i e mailed barrry grant they said annular boosters would provide no benefit for my set up but said they would use a 825 mighty demon road race?
the research continues.

[Tom Kirkham]

Here is an article by a respected author and researcher David Vizard on booster design on Holley carbs:

http://www.popularhotrodding.com/tec...ech/index.html

[csx wnab]

Originally Posted by Tom Kirkham

The best running carbs we have used are modified Holley 9381 (830 CFM, with annular boosters). We mill the air horns and restrict the PV circuit. We also tune up the accelerator circuit (cams and squirters). This carb is very drivable, but will be down about 10 HP on a dyno to an 850 DP. In light weight cars with big engines I prefer mechanical secondaries. The other good thing about this carb is it is one of the least expensive Holley carbs you can buy.

i'll have to agree with tom, i have been running this carb on a couple of different types of cars. first on my dragrace chevelle with 502/4sp combo. and now on my 427 cobra. just some re-tuning and what a great carb. instant throttle response and if you keep your foot out of it........desent milage too. i love those 9381s.