<font size=4> IMO, the 97 and the 81 are both a little outdated by the technological advances we have brought our engines to these days. I know that Ed Johnson is using two 97s on his blue speedsters but is having issues with them. I run 94s in both single and dual carb applications and find them MUCH superior to the 97 or the 81 in all respects. I have the ability to tune all of the stumbles, hesitations, and etc. out PLUS, most of the leaks!!



The old thoughts were that the 81 ran better because the 97 was too big. The problem is that the engines most people were bolting them on had "deeper problems" inside engine (worn or sloppy camshafts, poor ignition, weak compression (under 6:1)) so naturally the 81 was a better band-aide. Do the math on the size engines that the 81 and the 97 originally came on. Doesn't it seem unlikely that a smaller carburetor would give better performance on a Model A engine that has had the compression increased and the camshaft changed for better mid-range?



My opinion is go to the 94 which has a much superior pump circuit, a power circuit (with tunable power valves), a nice idle circuit, and an affordable price to the availability.



Here is the new carb & manifold going on my wife's speedster. Gonna be street driven to...











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