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01-19-2021, 02:45 PM
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#1 |
 Drives: 2017 Camaro 1ss A8 Join Date: Nov 2019
Location: California
Posts: 114
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Does wheel size change affect tune
I currently have long tube headers with off road x pipe, intake and a flex fuel tune. I was dyno tuned on the stock wheels that come on our cars. I wanna upgrade to 305’s in the back and 285’s in the front or some d5 forge stars with 305/45/17’s. Will this affect my tune at all? It might be a dumb question, but I’ve heard how it can affect it. Thanks
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01-19-2021, 03:03 PM
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#2 |
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BL1ZZRD
Drives: '16 Camaro 2SS, '20 Equinox Redline Join Date: Jul 2009
Location: Buffalo, NY
Posts: 7,840
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Depends on the overall diameter of the new tires compared to stock. It might change the torque readings a little and also the speedometer. I think your ok if the diameter is within a half inch of stock.
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01-21-2021, 12:34 PM
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#3 |
     Drives: 2017 Camaro 1SS Join Date: Aug 2016
Location: NH
Posts: 1,692
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With the 305/45-17 MTs, the speedometer will read lower if you don't correct for it in the ecm tune. Also the auto shift points will change if the tcm is left alone, mine short-shifted with the tall tires and a locked tcm. Trans tuning is needed if you want to fix that issue.
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