[3258]

This brings up a couple questions I have. As you said "....you rarely adjust the amount of stop, just the time on the stop" When tuning for .90 racing, i assume that you adjust the amount of stop for a certain RPM?

So if I understand right, you have about 3 adjustments with an air system to run the perfect .90; The amount of stop, the amount of time you are on the stop, and the rate you come on and of the stop? I assume all these factors are based on how much under the index your car can run off the stop, atm conditions, track conditions, and the list goes on. Is there any rule of thumb to get a baseline place to start with this?

One thing I find interesting with the throttle stops design is that they are base plate designs, meaning they decided that it is better to throttle the air fuel mixture coming out of the venturi, rather than just throttle the airflow into the venturi. Obviously there was a reason because all of the manufacturers seemed to converge on that solution. I imagine it has something to do with the airflow of the venturi itself. I bet there has been some crazy things on cars throughout the history of superclass racing