Quote:
Originally Posted by oldE
Neat idea! I've been tempted to do the same with the F-150.
Not sure why you are thinking you are getting a reduction in RPMs at speed since that would happen only if your torque converter (automatic tranny, right?) had been slipping or you were running larger tires.
Any mpg increases whould come from reduced throttle openings due to lower horsepower requirements at lower drag levels.
Keep up the good work!
Les
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My rpm's (as I recall them for earlier today) - automatic trans
2,050 at 70 mph
2,150 at 75 mph
2,300 at 80 mph
Before the front chin spoiler was put in I think rpm's were up another 200, I'm looking to go from 18.5 mpg to 20 mpg. I just noticed the rpm's today because the radio seemed some much clearer and more detailed without the extra engine noise.