Quote:
Originally Posted by Greg Reimer 7376
That carb wasn't the only difference between the 62-65 250 and 300 horse 327. A good question was brought up, but I'd like to know what the CFM rating of the 4 Jet carb that the 220 and 250 horse small blocks was. The intake difference was notable, and the 461 head as opposed to the 520 head was another factor. Is the factored horsepower really that great a difference?
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Not sure on the AFB carb...but checked into the 4GC's cfm rating many years ago...
Think I found about 475 cfm for the smaller early carb..(circa '57-'60?)...
Thought that the later carb was about 525...on the 220 and 250 hp engines...
Think there's one other 4GC as well...but that doesn't apply here....
Talking Chevrolet ONLY here...other GM's might be different....