Quote:
Originally Posted by XfireZ51
Dyno,
Thanks for all the higher math.  . This was going to be my next step.
But let me clarify again the objective. I don't really care about the speedo accuracy. What got me started on this is the realization that I have gone through my upgrades and I am killing performance by having the equivalent of a
2.90 some odd rear gear. So the real purpose of this exercise is to at come up w gearing that approximates the performance of the stock setup. If the speedo is off, I honestly couldn't care.
The other objective of the thread is to give Ron fun. |
Changing from the stock ZR-1 tire diameter to one that is an inch larger doesn't have a huge effect.
25.7 x 3.45 = 26.7 x (Effective Dif Ratio)
Effective Dif Ratio = 3.31
Another way of stating it is that a 26.7 inch tire diameter (Z06) with a rear dif ratio of 3.45 is the equivalent of a 25.7 inch tire diameter (stock ZR-1) with a rear dif ratio of 3.31.
Not sure of the weight difference between rims/tires you are using, but acceleration could suffer. With the larger diameter tire, most of the weight is at the tread and thus further away from the axle centerline. A larger rim diameter also puts more metal at a larger radius from the axle centerline. The added rotational inertia will slow the tire's rate of acceleration.