Smarty ABS question
#1
Smarty ABS question
When I reset my Smarty for the tire height (35"), does this make all things correct...meaning the mileage computer in the overhead, odometer, RPM's, and speedometer...so if my computer says I drove 400 miles did I actually drive 400 miles? The taller tires seem to lower the RPM's a nice bit at the higher speeds, just want to make sure everything is reading accurately. Thanks.
#3
Registered User
The mileage computer in the overhead will never be right. It will set the ABS correct for Odometer/Speedometer and Trip computer. But the overhead is going to be off, some worse than others. My overhead reads anywhere from 4-5 mpg high depending on the Smarty/TST/EZ settings. It was not right when the truck was stock and performance boxes/downloaders just make it worse.
#4
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Join Date: Jul 2007
Location: Delaware
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And I have found the Smarty to be off slightly. When I installed 35 inch tires (new Toyo MTs), made the change with the Smarty to 35 inches, and then checked against a GPS, I was still off. Had to make fine tune adjustments, I think I am at 34.83 or something like that now... I don't think alot of people ever check there MPH against a GPS and make adjustments, which is one of the reason I take most mileage claims with a grain of salt...
#5
Many manufacturers also round up on the tire height from actual measurements. You can usually find the actual tire height with the tire specs on their websites. I think rim width also affects tire height a little.
#6
Registered User
I have had to adjust actual ABS rev per mile even after the dealer set to available option with DRBIII. I have BFG 285/70/17s 32.1" is about as close to GPS as I can get. Manufacturer specs says 32.7". If you measure the actual rolling diameter after on the truck it is usually less than manufacturer specs.
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