02-28-2005, 05:33 AM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: Bloomfield Hills, (Detroit area),
Mi
Cobra Make, Engine: Superformance 156, ex Paxton 351, now a 392 Ford Racing Stroker
Posts: 1,666
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Not Ranked
i used a portable GPS unit and my speedo is within 2-3 mph of gps actual in all speed increments of 10 mph from 30 to 70 mph . i can live with that. i just mentally adjust as i drive and look at the speedo . bill.
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