Rpm @ 28 Dia Tire W-4.88 Gears

[HOLESHOT]

NEED TO KNOW HOW TO CALCULATE FINISH LINE RPM WITH A 28" SLICK AUTOMATIC CAR WITH 4.11/4.56/4.88 SO I CAN DETERMINE BEST COMBO ENGINE WILL SPIN 6300 PEAK WOULD LIKE TO GO THROUGH TRAPS 6000-6100 MAX.

[moparmel]

ok, first you need to multiply your tire diameter by 3.14159 that will give you your tires circumfrence. now, the formula is 17.6 x MPH divided by tire circumfrencex60 x gear ratio x 1.06 (this is the amount of converter slip at the finish line) if you feel that your converter is more efficient then you could use a lower number i.e. 1.04. hope that this is helpful to you. with this formula you will need to know the MPH you think you will or would like to run.