whats a good size carburetor for a Mopar 440?

[motoreese]

I am running a Holley 750cfm carburetor on a 440ci engine, I was told i should be running an 850cfm?

Thoughts?

[moparnation74]

We need more Info my friend!

[A383Wing]

go here and input your realistic numbers that the engine will see and it will give your answer

http://www.4secondsflat.com/Carb_CFM_Calculator.html

[500Jon]

Good question indeed?

We always used to run 750cfm's on our 440's.
Now we have found that a good 650cfm carb will do the job!
The calculators say as much, but if you wanna go real fast, its 800cfm.
I ran an 1050 on my race-motor 440ci engine, it went down to 2mpg!!!

[Stegs]

i have a bone stock 440, other than a ignition upgrade and carb

my carb is a eddy performer 600 cfm carb


car runs great, only issue is i have some slight pinging on the secondary side, just need get bigger jets and tune it

but 600 cfm on a bone stock 440 is great...throttle response is awesome, very driveable (thats what i wanted)

[ACUDANUT]

A Holley 750 is a perfect fit. 

[ionracer24]

I have a 650 that i changed the jets, power valve and readjusted the accelerator pump and retarded the timing a bit and it runs like a champ now!

[white]

I have a 750cfm for 20 years now and works great

[Johnnys440Charger]

Running a Holley 650 4777 double pumper on a stock 440 727 automatic tranny.

[hemi-hampton]

What size cam do you have? I gotta Racer Brown 540 lift & 292 duration (advertised, not at .500) & it runs good with a Edelbrock Performer 800cfm Carb. LEON.

P.S. 850 to much if stock or close to stock.

[Nacho-RT74]

stock TQs were 850 cfms on stock BBs...

[500Jon]

Never understood the TQ's?

As Mopar went into the lean-burn 'emissions era' the carbs got bigger for both big and small block engines?

As we know, nearly all the Big-block heads are very similar.
A little known fact is the 452 will outflow the 906, why is this relevant?
We ran a 650 Holley on a tm6 with a six-pack 484 cam, in a Dart with 452 heads.
If you tried that with 906 heads it would eat da SEATS!!!
It would run 13.10 all day long and a two hundred mile trip home!

[BSB67]

I am running a Holley 750cfm carburetor on a 440ci engine, I was told i should be running an 850cfm?

Thoughts?

Depends on the rest of what you have, and on your goals.

Knowing nothing about what you have or want, a good 750 is probably a balanced place to be.