Autolite 2100 / 4100 / Motorcraft 2150 / 4150 a Carb Sizes

bubba22349

Top Poster
VIP
Supporter 2021
Supporter 2019
Departed Member
Ran across this info Autolite / Motorcraft 2V and 4V carb size info awhile back and thought it might be helpful to some. Enjoy (y) :nod:

Bret":lekxxjhb said:
I found the flow rates for MC2100/2150 2 barrels.

This information comes from CJOFFROAD.COM. That website has a ton of information on these carbs.

2V 2100/2150 at 3"Hg. Venturi size listed first.

0.98 = 190 CFM
1.01 = 240 CFM
1.02 = 245 CFM
1.08 = 287 CFM
1.14 = 300 CFM
1.21 = 351 CFM
1.23 = 356 CFM
1.33 = 424 CFM

In order to compare these carbs to 'metric' carbs, here is a conversion list. Remember that venturi size is not the same as bore size. In example, a Weber 32/36 has venturies of 26mm/27mm. The MC2100/2150 carbs have syncronous butterflies, just like the Weber 38/38 DGS carbs.

0.98 = 24.9mm/24.9mm = 190 CFM
1.01 = 25.6mm/25.6mm = 240 CFM
1.02 = 25.9mm/25.9mm = 245 CFM
1.08 = 27.4mm/27.4mm = 287 CFM
1.14 = 29.0mm/29.0mm = 300 CFM
1.21 = 30.7mm/30.7mm = 351 CFM
1.23 = 31.2mm/31.2mm = 356 CFM
1.33 = 33.8mm/33.8mm = 424 CFM

THE FRENCHTOWN FLYER":lekxxjhb said:
Thanks for the info. This info is often sought after. It should be on the FAQ post above.

Remember that four barrels are flowed at 1.5 "hg. So these flow numbers do not equate to 4V flow. To convert divide by 1.41.

So, for example, a 190 2V would be equivalent to a 135 4V.
A tri-power using 3 of these 190s equals a 404 cfm four barrel.
 
Please make this thread a sticky.
I have used this info on several occasions and have had to search for it each time.
 
justa note
I get troubles tryin to call up c j c off road dot com
(500 errors whatever they are). Must just B for us bronk owners
(they have it baked in due to the rivalry!!!). Tryin it different brings
up (our growing 'friend') "cj foney"
 
Holley specs.
1.19 = 7448-350 CFM @ 3" @ 1.5" 248 CFM
1.38 = 4412-500 CFM @ 3" @ 1,5" 355 CFM
 
Back
Top