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Speedo Error


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I just purchased an 05 SRT10 (6 speed). On the way home, I immediately noticed the speedo is reading fast ...




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Old 09-03-2017, 11:08 PM
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Speedo Error

I just purchased an 05 SRT10 (6 speed). On the way home, I immediately noticed the speedo is reading fast by approx. 10 mph. The truck has a K&N setup and supposedly has had a tune done. There are no other mods that I'm aware of and I don't think the rear gear has been changed. Shows approx. 1500 RPM at a corrected 70 mph (I followed another car to verify the error).

I'd appreciate some input on how to correct this. I've no problem putting the tune back to stock, providing the K&N can be used with a stock tune.

Some input would be much appreciated.

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Old 09-04-2017, 03:03 AM
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1500 rpm at 70 mph in what gear?
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Old 09-04-2017, 09:17 AM
You got a Hemi?
 
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Sixth gear.
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Old 09-05-2017, 09:24 AM
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What size tires are on the truck?
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Old 09-05-2017, 10:47 AM
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Yup tire size is the only thing that's gonna change speeed.
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Old 09-05-2017, 11:30 AM
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Yup tire size is the only thing that's gonna change speeed.
Or Cuervo Gold
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Old 09-05-2017, 05:56 PM
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Or Cuervo Gold
That always slows things down!
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Old 09-05-2017, 11:24 PM
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That always slows things down!
Not talking about Nam grass but the real gold stuff.
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Old 09-08-2017, 11:13 PM
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Tires are factory size. 305/22. I'm wondering if someone has used the tuner to adjust for different size tires previously. I'm going to hook it up and try to adjust for the stock tire height and see if that corrects the problem.

And thanks for the advice, not withstanding the cuervo...
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Old 09-09-2017, 12:44 AM
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Quote:
Originally Posted by Doug C View Post
Tires are factory size. 305/22. I'm wondering if someone has used the tuner to adjust for different size tires previously. I'm going to hook it up and try to adjust for the stock tire height and see if that corrects the problem.

And thanks for the advice, not withstanding the cuervo...
305/40-22? Not in the tune boss
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