Speedo off that much?
07-23-2005, 07:02 PM
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Speedo off that much?
Well the old lady was out last night and got pulled over doing 51 in a 35 
The cop said most of it was probably due to the bigger tires but I said it wouldn't be off much to accomodate her on her grand appearance in court. I just used 4crawlers speedo calibrator to see just how far it would be off and stock tire size is 225's and I got 31's on there now and it said almost 5mph off 
Does this sound right? I did tell her it was coming out of her paycheck to cover the ticket and extra insurance fees 
The cop said most of it was probably due to the bigger tires but I said it wouldn't be off much to accomodate her on her grand appearance in court. I just used 4crawlers speedo calibrator to see just how far it would be off and stock tire size is 225's and I got 31's on there now and it said almost 5mph off Does this sound right? I did tell her it was coming out of her paycheck to cover the ticket and extra insurance fees
07-23-2005, 08:19 PM
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Get out on a freeway, set it right at 60MPH indicated, and time it between 3 or 4 mileage markers. With a stopwatch. You need to get a good average. Write down ALL the variables, the truck tire size, time of day, freeway location, time of each leg, speed indicated, any variations in speed and why...
Then you can take it and figure out what your actual speed is (Rate * Time = Distance, so D/T=R).
And if you want to fight it, take all the paperwork into court with you. It makes you look prepared and intelligent (whatever the actuality may be *duck* Just kidding, don't hit me!), and paper always adds weight to any argument.
Then you can take it and figure out what your actual speed is (Rate * Time = Distance, so D/T=R).
And if you want to fight it, take all the paperwork into court with you. It makes you look prepared and intelligent (whatever the actuality may be *duck* Just kidding, don't hit me!), and paper always adds weight to any argument.
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07-24-2005, 06:12 AM
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Mines off by 11.5 mph @ 65 mph. The wife got a ticket about 2 weeks after the 33's were put on ( i knew it would be off but didn't tell her and I'm not gonna now since she's already payed the fine) she no longer asks to use my rig.
07-24-2005, 06:24 AM
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Originally Posted by 2ToyGuy
Get out on a freeway, set it right at 60MPH indicated, and time it between 3 or 4 mileage markers. With a stopwatch. You need to get a good average. Write down ALL the variables, the truck tire size, time of day, freeway location, time of each leg, speed indicated, any variations in speed and why...
Then you can take it and figure out what your actual speed is (Rate * Time = Distance, so D/T=R).
And if you want to fight it, take all the paperwork into court with you. It makes you look prepared and intelligent (whatever the actuality may be *duck* Just kidding, don't hit me!), and paper always adds weight to any argument.
Then you can take it and figure out what your actual speed is (Rate * Time = Distance, so D/T=R).
And if you want to fight it, take all the paperwork into court with you. It makes you look prepared and intelligent (whatever the actuality may be *duck* Just kidding, don't hit me!), and paper always adds weight to any argument.
07-24-2005, 06:27 AM
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Originally Posted by 94x4
Duuuudde! 
You called your girl "...the old lady...".
You better hope that she never sees your post.
You called your girl "...the old lady...".
You better hope that she never sees your post.
Ticket #2 coming up!
07-24-2005, 06:31 AM
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Originally Posted by Paul H.
It will never be that far off. She was speeding plain and simple.
07-24-2005, 06:50 AM
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I suggested the freeway thing, because a) I don't have a GPS to test with and b) In this dinky little pissant town, we don't have a garage that can do a speedo test. Sad, isn't it?
07-24-2005, 06:58 AM
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Originally Posted by 2ToyGuy
I suggested the freeway thing, because a) I don't have a GPS to test with and b) In this dinky little pissant town, we don't have a garage that can do a speedo test. Sad, isn't it?
I'll probably get the money to get a GPS when they are out of date....kinda like cassettes to cd's
07-24-2005, 07:51 AM
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Cassettes? You mean 8Tracks aren't "in" any more??? No WONDER I can't find any tapes...
07-24-2005, 08:08 AM
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I would go back and retrieve you some 8 tracks.....but I had a transfunctioner go out and now I'm stuck on welfare in this modern society with no money and rising gas costs.... 
Semper Fi! Tell your daughters I wish them the best of luck...
Semper Fi! Tell your daughters I wish them the best of luck...
07-25-2005, 10:26 AM
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Guys listen up - Jon 7248 is correct - your speedo can never be a fixed number of mph off - it will always be a percentage. This isn't just another opinion - its fact based on the physical mechanics of how things work. If you want to avoid tickets of your own you need to understand this.
If it's off for example 5 mph at 50 mph actual that's 10%. So, it will be off 10% at any speed - 7.5 mph at 75 and 10 mph at 100.
If it's off for example 5 mph at 50 mph actual that's 10%. So, it will be off 10% at any speed - 7.5 mph at 75 and 10 mph at 100.
