Well, sort of. I used the mile markers on the highway to gauge the accuracy of my odometer, and after five miles, my odo. was up only a tehnth of a mile, so 2% fast after doing the math. I'm surprised that when the rear axle w/ 3.55s was installed, they put in the appropriate speedo pinion gear. Just to make absolutely sure, I'll be verifying the gear ratio tomorrow when I have the car up on a lift. The tag says 3.55, but I think I'd be wise to make sure it's right. If it is, 17 MPG when it was out of tune for half the tank is pretty good!

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'74 Duster w/ HEI ignition, beat to snot suspension, A904, 8.25" 3.55 SG rear, still being tuned up and gets 17 MPG

Know how they always build a better idiot? That's me

I use a GPS to check speed and distance, and to set the cruise in the assorted vehicles I drive.

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

Wassamatta, you not in tune with the old skool?

I've got a GPS for my laptop, but I have yet to find a 12V power supply that'll work with it without having serious issues.

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'74 Duster w/ HEI ignition, beat to snot suspension, A904, 8.25" 3.55 SG rear, still being tuned up and gets 17 MPG

Know how they always build a better idiot? That's me

Vary rarely are both the speedometer and odometer correct (or the same percentage off)


My odometer is within 1%, the speedometer 5-8% high..........

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

My daily driver is a '64 Valiant - How "old school" can I get?

The kids gave me a Garmin Etrex for father's day a couple of years ago, and it's been a lot of fun and very useful. I would like to get a WAAS-enabled GPS with compass for geocaching, but this one works.

For what it's worth, open road racers use GPS's to track their average speeds. The older Garmin GPS III-Plus still reads to 0.1 MPH at over 100 MPH!

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

...I'll bet that's something you have yet to tell your wife isn't it

Not as old school as me! hehehe
Reppin the 62

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1962 Valiant V-200
170 C.I. Super Six, HEI, Dutra Duals