Quote:
Originally Posted by johnta1
Can't answer all the questions, but I think the gear ratio or something isn't right on your RPM at 70?
(unless you are using a real small diameter tire)
Try this calculator:
Calc RPM, Gear, MPH, Tire Diameter
On question #2, If it's like POCI, I would think as long as it was available in that year, it would be good to go.
(don't think they check cowl tag to actual paint?)
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Thank you for the calculator- definitely going on my favorites tab!
You're right, John... something just doesn't add up. I have 235/60-15 tires (26.1" diameter) and 3.55 gears ("WH" stamped on the rear axle). According to the calculator, I should be turning 3200 rpm at 70 mph. I think the speedometer is close enough because when I keep pace with the traffic on the interstate, it is showing 70 mph give or take a couple of mph. I have hood tach which I don't think is the original... has there been any problems with the accuracy of the reproduction units?
I think I will take it out on I-81 this weekend and double check my readings.
On question #2, it is painted starlite black which was available in 68. Now, I do have 15" Rally II's (which I guess weren't available till 1970?) with radials and a Judge T-handle shifter. I just don't know if these changes kick me out of stock class and put me in modified class (or whatever they call it).