Little Help Please

[01RedLightning]

Ok so what I initially thought was a fuel problem at the dragway turnes out to be my slicks. They measure 28/10/16R, and my stock tires are 295/45/18R. Which measures out to be about 28.45 inches tall. I figure the differences in .45 inches is throwing off the computer. I can change my axle ratio and "tire revs per mile" on the Predator. Anyone know how to calculate the "revs per mile" for my slicks. 733 Is what the revs per mile are for the stock tires on the predator.

 

[Fade 2 Black]

720 revs/mile.

28" x pi = 87.9" circumference. 5280' in a mile x 12 for inches = 63360.

63360/87.9=720 revs/mile. This should correct your shifts a little bit.

The most correct way is to change the effective gear ratio in the tune but you cannot do that with the handheld. The revs/mile should work good enough.

 

[brucewrs]

Yeah,what he said.:lol: :lol: :lol: :lol: :lol: :lol: LOL
Thats some good info Bob..I suck when it comes to math.

 

[01RedLightning]

Bob I can change the gear ratio on the predator as well. Should I do both and if so what should I put the gear ratio at?

 

[01RedLightning]

oh and P.S. Thanks for all the math, it's exactly what I was looking for MAN do I love this forum!