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Discussion Starter · #1 ·
On the xcal3 theres the option to change the WOT air/fuel mix by %'s. Does anyone know if you can SAFELY change that without doing any other changes. And if you can, does it do anything?
Dont mean to sound dumb if i do but i dont know very much about my tuner and i havent been able to find where i can read more about it
Thanks
 

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N/A 4v Guru
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3,484 Posts
You can if it needs it. You need to datalog it first to see where your AFR is. Have you up the timing any with the tuner? I have my mach at 4 degrees advance and 2% leaner on 91 octane.
 

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MM's Mad Scientist
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5,102 Posts
You would need to run a wideband and run the tune on a dyno. Different cars make better power at different a/f ratios. For instance, my car likes more fuel to run at it's best.
 
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