How many CFM does a 1945 1-barrel flow. And did the truck 1945's have a larger diameter throat than the car models. What is the highest flowing 1-barrel out there?

_________________
82 D150-225/727
02 Dakota-3.9/5 speed
87 GMC C7000-8.2 Detroit Diesel/5+2

The highest-flowing 1bbl used on the slant-6 was the 1963-only Stromberg WA3. Good luck finding one.

The Carter BBS, like the Holley 1920, came in different "sizes" (referring to venturi and throttle plate diameter).

The car and the truck were the same. The only exception was the Feather Duster or Dart Lite which had a slightly smaller throttle bore (were these 1945's or 1920's ? I don't remember).

I'm guessing the flow is somewhere in the 150-175cfm range. That doesn't have any real science behind it except to note that the bore & venturi are close to that of a 750cfm Holley

_________________
My truck is a Frankenstein creation
Built from the dead carcasses of others
And brought BACK TO LIFE!

Mnecaise, that's not correct. There were numerous different venturi and throttle bore sizes for the Carter BBS, the Holley 1920 and the 1945. Take a look through any year's factory service manual and see for yourself. Throttle bores were generally either 1-9/16" or 1-11/16"; venturi sizes ranged from 1-7/32" to 1-3/8". All depending on engine size and application. Early 170s, taxis and fleet cars (and the Feather Duster/Dart Lite) got the smallest ones. Big cars, "power pack" cars and trucks got the biggest ones.

Keep in mind, one and two-barrels are measured @ a different vacuum drop than fours...

D/W

_________________

If it ain't broke, fix it!

SlantSixDan = MrPartsBook

You Da Man

D/W

_________________

If it ain't broke, fix it!

The HP Holley book printed in 1976 says the 1945 came in one size with 1-11/16" throttle bores and flowed 203 cfm @ 3" hg.

Aside from the HP Holley book being full of errors, the 1945 was introduced in 1974 and discontinued in 1987. Your version of the Holley book has a 1976 copyright date, which means it was researched and written in '74-'75.

So which flows better, the 1920 or the 1945. Did any Fords or Chevys use the Stromberg carb you were talking about. Mopars are rare in my area.

_________________
82 D150-225/727
02 Dakota-3.9/5 speed
87 GMC C7000-8.2 Detroit Diesel/5+2

The 1920 flows better; it has a less-restrictive venturi.

No, Fords and Chevrolets did not use the carburetor I mentioned. It, like the 1920 and the 1945 and the BBS, was manufactured by the carburetor company for the automaker (in this case Chrysler) and there is nothing to be gained by randomly swapping on Ford or Chevrolet carburetors.

You would think a one barrel carb off a Ford 300 six would have the most cfm's and would compare to a two barrel carb. off the super six. Would there be any truth in that?

_________________

82 D150 Slant6 Shorty
http://www.cardomain.com/ride/658846