[Mike Hedger]

First you need to know your throttle stop ratio, IE is it 2 to 1 (you change from 2.50 to 2.48 and pick up .01 on the track) The old timer you had was prob. OK as these were just about indestructable. You will throw it in the trash after using the 450 as it is a great piece. Next what does the DA do to your car on gas a good rule of thumb is for every 200 feet of DA change it usually changes .01 on the track so using these numbers if you ran a 10.86 at 1800 feet of DA and you were to run again at 2000 feet of DA you need to compensate for -200 feet so it will slow you .01 or 10.87 then add the 6 numbers for the rest of the .03 you need to slow down.

After you know these numbers you can do your own math and just use your prediction to double check your math.

Double check your soll. on the T stop and keep it lubed also make sure you have a good strong 12V to it. Hope this helps, Mik eHedger S/C Q/R 4600