Jon, if two 600 carbs do not equal 1200 cfm, what do they equal?
The reason I ask is, I have three Model H Rochesters on my 250 Chevy, I have been told the "H" is about 78 cfm. I run all three together as one carb on a open plane intake, all three runners are hooked to one plenum. I have always considered this set up to be about the same cfm as my original Mono-jet, approx. 220 cfm plus or minus some.
I have run both, stock and modified at the drag strip making three to four runs each to get a good solid base line, each set up was the same, 17.90's at 73 mph. I like the three carbs for the better throttle feel and fuel milage, at least 2 to 3 better then the Mono-jet. The Mono-jet was tuned to the best I could get it using air-fuel monitor in the tail pipe and extensive test runs and milage runs. The three H's were treated to the same tune up. I bet I changed jets and float settings 15 times or more.
So what can I tell someone who ask, What cfm are they? Joe Hand, Lees Summit Mo.
