Using Hypertech "tuner" to set speedo for tire height

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Apr 23, 2013 | 08:44 PM

Kyledvor61

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Using Hypertech "tuner" to set speedo for tire height

The first f body I bought came with a Hypertech tuner. I just bought a different car with a 408 iron block, built 6 speed, 9" etc. Bluecat out of Kentucky tuned the car. When I replace the tires on the car with a different size, would I be able to plug in my hypertech to correct the speedo readout without affecting any tuning that bluecat did? I sure as hell dont want to overwrite his tune with a hypertech "tune"

Apr 23, 2013 | 09:21 PM

Ed Wright

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Last time it was used, was car "put back to stock"? If not just throw it away.

Apr 23, 2013 | 09:25 PM

Kyledvor61

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Last time it was used was on my 99 with catback, 85mm MAF, lid and 160* thermostat. I believe the car was sold with the hypertech tuning on it. Havent plugged it into the new car.

Apr 23, 2013 | 09:29 PM

Ed Wright

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If used on a different car last time, it is for sure a door stop. May as well pitch it.

Apr 23, 2013 | 11:33 PM

minytrker

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Quote:

Originally Posted by Kyledvor61

I'm pretty sure most handhelds will wipe out your custom tune. I tuned a truck and the guy tried to adjust his tire size with a handheld and it erased my tune. He had a crane hand held.

Apr 24, 2013 | 09:28 AM

Ed Wright

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Quote:

Originally Posted by minytrker

I'm pretty sure most handhelds will wipe out your custom tune. I tuned a truck and the guy tried to adjust his tire size with a handheld and it erased my tune. He had a crane hand held.

Unless they have changed something, a new blank Hypertech programmer reads and stores a copy of your present calibration, and considers this "stock". This ONLY applies to a blank programmer! If you have your vehicle tuned, and own one of these be CERTAIN you "put it back to stock" before any tuning is done!! Then, if you only make a tire change it reads it, and writes it back with only the tire size changed. If you failed to take the previouse tuning out, putting the programmer back to blank configuration, it will absolutely write over your new tuning. You have to use your head a little. :-)

If it was used on another vehicle, and never used the "put back to stock" function, it is now a door stop. Absolutely will not function on another vehicle! May as well throw it away.

Apr 24, 2013 | 12:44 PM

Kyledvor61

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Well ****, I only kept it because I thought I could use it, I'm glad I asked before I tried it. I'll mail it to the new owner of the car so he can use it. Thanks guys.