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  #1  
Old 05-15-2013, 03:08 PM
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Default Grear Ratio/Speedo Calibration?

Does anyone know of a programmer that will recalibrate the speedometer a 2004 Hemi for oversize tires? Most of the programmers I know advertise that they do, but in the very fine print it usually excludes the Hemi.

I did do gears after I got the oversize tires and even though a friend and I used the online calculates, charts, as well as good ol' paper and pencil it still seems like its a bit off.
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Old 05-15-2013, 11:02 PM
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diablo and superchips are two.
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Old 05-16-2013, 10:54 AM
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Quote:
Originally Posted by TheSatinPumpkin View Post
diablo and superchips are two.
Good to know, my hyper-poop says it does but in the very fine print in the manual, its *All engines but the 5.7L Hemi
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Old 05-16-2013, 01:57 PM
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Bummer What model Hypertech do you have?
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Old 05-16-2013, 02:02 PM
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Its an older model to be sure. Its the square boxy style not a hyper max of one of the new ones with the color displays at all. It is a flash programmer meaning a hand-held not a PCM chip like the JET Modules. At the time when I found out that the hypertech model I have doesn't recalibrate the speedo I thought it was just a limitation with the early Hemi computers in the 2003-2005. I know when I was looking into how superchargers were coming along back in the day, that Kenne Bell's website said they had a 2003 Hemi Dodge Ram and that they were NOT going to offer it for those years of computers because of how restrictive the computer was to modification.
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Old 05-16-2013, 05:03 PM
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Yeah the early 04 years have limited tcm tuning vs 05+ up but the Diablo (DSP or Trinity) and Superchips (3815/3865/Cortex) will be able to adjust your tire diameter.
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Old 05-16-2013, 05:54 PM
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Thanks, sounds like I should look into selling my Hypertech and switching to a different programmer. I would definitely like to get something that could set our speedo correctly.
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