Speedo accuracy?
#1
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Join Date: Dec 2006
Location: Bellevue, WA
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I noticed as I drove by (and slowed down) one of those neighborhood radar displays that my speedo indicated 39-40...the radar display showed 35? Could low profile tires make that much difference?
Jay
Jay
#3
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Mine is unbelievably accurate, according to GPS. I was amazed to see it within 1 mph at the 80 mark. My Audi is bang-on as well - Now the Ducati is another story - I think the bike manufacturers try to fool you into going slower than you could/would if you knew your real speed of travel.
#4
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There was a thread on this awhile back and, IIRC, most fell within a couple of percentage points. My digital read-out is spot on, while the analog reads within 3%.
If you changed the circumference of the tire from stock, the accuracy of the speedo will be off proportionately. What are your tire sizes?
-Jim
If you changed the circumference of the tire from stock, the accuracy of the speedo will be off proportionately. What are your tire sizes?
-Jim
#5
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Originally Posted by 1998C2S
Mine is unbelievably accurate, according to GPS. I was amazed to see it within 1 mph at the 80 mark.
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#8
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Mine is about 10% fast compared with my satnav. My other two cars are more or less spot on.
I don't understand why an electronic system can be so far out. Maybe electronics ain't Porsche's thing?
I don't understand why an electronic system can be so far out. Maybe electronics ain't Porsche's thing?