Mopar CFM Ratings for Carburetors

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69 Cuda 440

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Mopar 'Hustle Stuff' Catalog {Mopar CFM Ratings}

Carter AFB

#3853S ............. 460 CFM ...... 1965 '273/235 HP ' ~ {Manual Transmission}
#3249S ............. 450 CFM ...... 1962 '361/305 HP'
#3447S ............. 570 CFM ...... 1962 '413' {410 and 420 HP}, and 1963 '426' {415 and 425 HP} 'Max Wedge'
#3258S ............. 465 CFM ...... 1962 '383/343 HP' ~ {Front Carburetor}
#3259S ............. 475 CFM ...... 1962 '383/343 HP' ~ {Rear Carburetor}
#4742S ............. 570 CFM ...... 1970 '426 Hemi' ~ {Front Carburetor ~ Manual and Automatic Transmission}
#4745S ............. 570 CFM ...... 1970 '426 Hemi' ~ {Rear Carburetor ~ Manual Transmission}
#4746S ............. 570 CFM ...... 1970 '426 Hemi' ~ {Rear Carburetor ~ Automatic Transmission}

Thermoquad

#4972 ............... 800 CFM ..... 1971 '340' ~ {Manual Transmission}
#4973 ............... 800 CFM ..... 1971 '340' ~ {Automatic Transmission}
 
How about the 360, 400, 318, and 273 2bbls?
 
318willrun said:
How about the 360, 400, 318, and 273 2bbls?
Click to expand...

2-Barrels

273 ~ {1964 thru 1969}
Carter BBD {1.437" Throttle Plates x 1.063" Venturi}.......... 275 CFM Rating

318 ~ {1968 and up}
Carter BBD {1.437" Throttle Plates x 1.186 Venturi}............ 285 CFM Rating

360 ~ {1971}
Holley {1.563" Throttle Plates x 1.343 Venturi}................... 350 CFM Rating

383 ~ {1962 thru 1971}
Carter BBD {1.563" Throttle Plates x 1.313" Venturi}.......... 365 CFM Rating

400 ~ {1972}
Carter BBD {1.563" Throttle Plates x 1.313" Venturi}......... 365 CFM Rating
 
What do you have on the 1968-70 340?
I know these could really wake up with a bigger carb.

Back in the day, I installed a 1973 T-quad & intake on my 69 340 Dart & picked
up 4 tenths.
 
mikedevore said:
What do you have on the 1968-70 340?
I know these could really wake up with a bigger carb.

Back in the day, I installed a 1973 T-quad & intake on my 69 340 Dart & picked
up 4 tenths.
Click to expand...

Mike,

340/275 HP {1968 thru 1970}
* Carter AVS
* Throttle Plates.... {1.437" Primary x 1.686" Secondary}
* Venturi ..............{1.186" Primary x AV Secondary}
* Primary Jets ...... {.089"}
* Secondary Jets .. {.095"}
* CFM Rating......... '630'

Note; This is 'directly' from the Carter Carburetor Specification Book {old schoolbook}.
 
bigtom said:
What about the one year only Rochester 2GV on my 71 318 Dart?
Click to expand...

Big Tom,

How can that be ?

Rochester #2GC Specifications

Rating_______Throttle Plate x Venturi

* 278 CFM ............. 1.437" x 1.093"
* 352 CFM ............. 1.686" x 1.186"
* 381 CFM ............. 1.686" x 1.250"
* 423 CFM.............. 1.686" x 1.312"
* 435 CFM ............. 1.686" x 1.375"
 
Carter CFM Ratings

As per the Carter Catalog

AFB Carburetor for the 273
1965 .... #3853 and #3854
1966 .... #4119 and #4120
1967 .... #4294 and #4295

Primary ......... 1.437" {Venturi > 1.063"}
Secondary ..... 1.563" {Venturi > 1.250"}

As per Chrysler, this Carburetor was 'advertised' at 500 CFM.

But, the Hustle Stuff Catalog listed it at 460 CFM.

Our testing back in the day, had the best one performing
at 517 CFM {W.O.T.} with some 'tweaking'.
 
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