Quote:
The car is bracket raced and we are
using a trans brake. Stall speed is 4700.
...how did you come up with your stall number? is that it's advertised stall or have you done a high gear test to get a true stall.?..u can also find out the stall by taking the low end chip out and matting it and watch the tach and see where it goes up to.which ever way u choose is fine, but you need to know the real stall to help make your decision  ...as stated previously each car will react differently..the rear suspension will also dictate what rpm to leave at..my car is a small tire car with coil overs and ladder bars..i leave at 3000 but thats not the fastest(60 ft.) rpm for my car but it's the most consistant..and thats why i use it..my car stalls at 4500 doing the high gear test but if i try to leave at that high rpm i run into alot of 60' times jumping around..if i bring the rpm down to 3k it's much more dependable..so i suggest you start at 3k and go from there..good luck.. 
-1967 Plymouth Satellite #3555
446 cid on E-85
best 1/4 et 10.577 @ 127.58
best 1/8 et 6.722 @ 100.68
best 60ft. 1.419
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