Tach Accuracy

[463]

use this link http://www.huntergraham.com/twcc.htm

[Already Gone]

Originally Posted by 463

use this link http://www.huntergraham.com/twcc.htm

Thanks for the link Trueman. I've checked my specs on a similar calculator and that is where I discovered that with 3:73's, 255/70 15 tires and a 3 speed auto trans at 65mph I'm doing 2800rpm and with 3:08's it should be 2300 rpm. That is 20% less which you should give me 2 or 3 more miles per gallon on the highway.