Jim,
You need correction for the 0.81 final only because they
may have a peculiar transmission speedo drive gear or cable
gear, presuming you are running stock tires (HA!), and a
stock rear end (double HA for Jim). Otherwise, it's measure
of 52.8 feet and count the cable turns pushing the car
between the marks. Disconnect cable from speedo and put a
piece of tape on the core end. The recommended Nissonger or
Momo will correct from this information alone. Don't need
to know your ratios. Shouldn't matter what your final is on
your transmission, year end, or tires with this method. The
stock calibration is in small print on your speedo face, and
probably reads "980", meaning 980 revolutions/mile. All
American speedos are 1,000 revolutions per mile, and they
adjust the drive gearing to match the standard. The British
make a different speedo for every car!!!
Steve
--
Steve Laifman < One first kiss, >
B9472289 < one first love, and >
< one first win, is all >
< you get in this life. >
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