[wtm442]

The bog/hesitation could be due to a lean condition or a rich condition when you mash the pedals. Putting the car on a dyno would tell you if its a rich or lean condition. Also, get the RPM's up to about 3500 RPM (while the car is moving) and stomp on the pedal. If you do not get the hesitation, the problem is most likely in the accelerator pump circuit.

First thing is too loosen the acc pump spring until clearance is observed under the lever and then tighten until clearance is removed. Then check to make sure you get gas out of the squirter nozzle as soon as the throttle is touched.

Second, change to a larger squirter nozzle assuming you have a lean condition. If that is no help, try putting the existing acc pump cam in the #2 position. Third is to try a different acc pump cam with a more aggressive cam assuming you have a lean condition.

Good luck.