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speedometer calibration for 4.10's

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Old 03-04-2008, 10:53 PM
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Default speedometer calibration for 4.10's

I just bought a 98 Z28 6 speed H/C/I car and it was dyno tuned with 3.42's but the gears are going out and whining like crazy so i have to change them but I would like to put in 4.10's but that will throw the speedometer off. Is there a fairly cheap way to calibrate the speedo?
Old 03-05-2008, 08:26 AM
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Your tuner should be able to do that easy.
Old 03-05-2008, 06:18 PM
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thats the thing I don't have a tuner so I was wondering if they made anything to just calibrate the speedo that was cheaper than a tuner. If I buy a hypertech will it mess up my current dyno tune because when you plug it in it installs its tune or can I just calibrate for the gear.
Old 03-05-2008, 10:55 PM
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Originally Posted by horse-power
thats the thing I don't have a tuner so I was wondering if they made anything to just calibrate the speedo that was cheaper than a tuner. If I buy a hypertech will it mess up my current dyno tune because when you plug it in it installs its tune or can I just calibrate for the gear.
Get in touch w/ a mail order tuner. MadZ28 is one.
Old 03-05-2008, 11:07 PM
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find someone with HPT in your area that has a license for your year and let them do it for free or really cheap. will take 5 mins max
Old 03-08-2008, 06:28 PM
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So are there any hand held tuners that will let you just change the gear ratio and not affect your custom tune?




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