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Old Predator tire size - gear chart

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Old May 19, 2008 | 12:57 AM
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Default Old Predator tire size - gear chart

Does anyone still have this? I have the really old Pred. and I lost my copy of the gear ratio to tire size breakout that I need to calibrate the speedo after a gear change. Yes, I already searched for about an hour and couldn't find it anywhere. Thanks guys.
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Old May 19, 2008 | 08:41 AM
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here ya go...
=======================

F = Factory Wheel Size
A = Actual Wheel Size


2.73 to 3.23 - F: 275/40-17 A: 245/35-15
2.73 to 3.42 - F: 275/40-17 A: 275/30-14
2.73 to 3.73 - F: 275/40-17 A: 175/35-14
2.73 to 4.10 - F: 275/40-17 A: 175/30-13

3.23 to 3.42 - F: 275/40-17 A: 235/50-15
3.23 to 3.73 - F: 275/40-17 A: 205/45-15
3.23 to 4.10 - F: 275/40-17 A: 165/40-15

3.42 to 3.73 - F: 275/40-17 A: 235/30-17
3.42 to 3.90 - F: 275/40-17 A: 235/35-16
3.42 to 4.10 - F: 275/40-17 A: 235/40-14
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Old May 19, 2008 | 08:46 AM
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I still have it, here are the M6 sizes:

3.42 to 3.73 - F: 275/40-17 A: 235/30-16
3.42 to 3.90 - F: 275/40-17 A: 235/35-16
3.42 to 4.10 - F: 275/40-17 A: 235/40-14

The chart I downloaded from diablosport in '03 says 235/30-16 for 3.42 to 3.73? Use www.f-body.org/gears/ to verify after making the change.

Last edited by 2001NBMZ28; May 19, 2008 at 08:55 AM.
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Old May 19, 2008 | 10:52 AM
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Wow, holy old school info Batman....

You know, there is an update available to fix this issue, allowing for proper tire size and gear ratio adjustment.

Thanks
Mike
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Old May 19, 2008 | 11:03 AM
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Yeah, need to send mine in one of these days too....don't want to lose my diablosport custom tune or run around without it though....daily driver.
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Old May 19, 2008 | 11:12 AM
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save the custom tune to your PC....

you should be able to read the current tune outta your car, then export it from the predator to your pc...

the instructions and necessary application should be on the download/support page at diablosport's site for your model predator.

either way, when you send it in to get updated, you're gonna have to be runnin' stock while it's shipped out...

but then when you get it back, you can just import your custom tune back into the predator and reinstall it to your car...
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Old May 19, 2008 | 08:27 PM
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Awesome guys, I really appreciate it.

Mike, I'll have to look into the update, thanks.
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