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      11-12-2012, 07:26 PM   #258
COBB Tuning
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Drives: 335i
Join Date: Dec 2010
Location: Austin, TX

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Quote:
Originally Posted by raceyBMW View Post
With the race gas maps, running 100+ octane, do you still need to worry about fuel trims? Or is that really more of an E30 issue?
Never a bad idea to check your trims, but you should be running the same as any other tune with the race fuel. Ethanol can cause issues with fuel trims due to the extra volume required to achieve the same AFR.

-Josh
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