CFM & MPG Carburetor myths.....

318willrun said

I think Hot Metal was speaking on ET only with his 850 DP. Maybe I missed your point, but nothing in the video said anything against spread bore carbs. I love spread bore carbs. Gas mileage was DP vs VS. And as far as CFM's, the TQ was advertised as 800 cfm's and was on top of 318's from the factory, which helps prove the "cfm" myth I speak of in the video.

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True, but the TQ is a totally different animal and cannot be compared to anything with mechanical secondaries, much less a double pumper. Since the TQ is a 100% vacuum secondary carburetor, that means its 850 CFM rating is only at maximum flow. If the engine doesn't need 850 CFM, it won't draw it. A better way to say it is, the TQ will flow "up to" 850 CFM as the engine demands it. If the engine demands less, then that's what it gets. I can tune (and have) an 800 TQ to run on a slant six.......and it ran QUITE good. I know I'm preachin to the choir hear, because you know all this.......but maybe some others do not. While I agree with your basic point, I disagree that the TQ comparison helps prove your CFM myth, because it is a totally different style carburetor than you are comparing it to.