[whale]

Thank you for your insite Jac Mac. We have made a lot of progress with this system since we started. It has always had excellent throttle responce.....just not good at cruise because of the large volume full of all that air and fuel. The box and smaller venturis has really helped. The addition of side dividers to make it as close to a IR is the next step. We have talked about tubes from carb to the runners and have not rulled that out. Using a wide band and fuel injection the A/F for power is around 12.8 to 13.2 depending on the engine. I am not sure what that is with webers. It seems to like more fuel ie, 11.5 to 12.0 with this system. Thanks again for all of your help and coments. wayne