Reply to "48 IDF Webers, has anyone completed a running driving setup?"

GT-Pilot: You have a point. We run IDA's on our 289 Cobra vintage race cars and usually use 42mm chokes. I have dynoed a set with handmade 45mm chokes on the 289, and they do produce more power, but the overall area "under the curve" was not appreciably better. We build our motors for a very flat torque curve and do not use lots of revs, as in vintage racing, you need the torque to pull you off the corners. I would think you could experiment with 42-45 chokes on the IDF's. The Weber factory calculation for single barrel per cylinder choke sizes result using 351 cu. in. in a 43mm choke for a 6,500 rpm power peak and a 45mm choke for a 7,000 rpm power peak. You could probably make a set of 48 IDF's work with these combinations.