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Setting superchip for bigger tires

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Old 11-19-2010, 07:16 AM
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Default Setting superchip for bigger tires

I just used my super chip with my new 33 inch tires, and should I being putting in my tire size as 33 or should i measure the tire and use that mesurment.
Old 11-19-2010, 07:21 AM
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Measure the tire and use the actual diameter to get the correct speedo reading.
Old 11-19-2010, 07:24 AM
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Be sure to use the rolling diameter and not the standing diameter if you want it correct.
Old 11-19-2010, 11:25 AM
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I'm running 35" Nitto Trail grapplers and my flashpaq is set at 33" and the speedo is dead on per my GPS. The flashpaq has the stock wheels and tires set at 30.75 for my 17" rims and 255-75-17's.
Old 11-19-2010, 12:04 PM
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What he said. Start with the actual measurement, not mfg's listed height, and then decrease tire height until you get it right on with the gps.

I have 315/75/16's. Mfg says 34.8. Actual mounted height, 33.5. Set the Flashpaq to 33.00 to get the speedo somewhat close to GPS. (Spent an hour re-setting and checking and re-setting and checking, and never got it to match)

My old ProCal seemed much better at setting the variables to get the speedo correct...
Old 11-19-2010, 12:07 PM
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Agree, guess and dial it in with the GPS. I have it set to 33.5 for my ~35-inch Duratracs
Old 11-19-2010, 12:21 PM
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I'm seeing a lot of us with our 35's closer to the 33 range. I know I was pissed to pay for mine to find out they were two inches less.


DON'T SAY IT!
Old 11-19-2010, 12:35 PM
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Almost makes you wonder how we got by in the old days without the GPS. Had to zero mine in that way also.



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