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      11-08-2019, 12:20 PM   #19
VisualEcho
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Drives: '18 M2 6MT
Join Date: Sep 2019
Location: Missouri

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2018 BMW M2  [10.00]
Quote:
Originally Posted by cecaa850 View Post
The tune is made for your car with your mods running the gas you have in your area. OTS tunes are generic to all vehicles whereas custom tunes are specific to your vehicle only. You log wide open pulls and send to your tuner. He makes adjustments depending on what he sees and sends them back to you. Lather, rinse and repeat.
In 2005 I would have agreed with you, but today's OTS tunes are pretty mod and gas-specific, and made to be very safe for the masses. Custom tunes do NOT add safety over OTS maps, they simply add HP/TQ via MORE aggressive tuning, not less. And many times these gains are at the expense of driveability.
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