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Old 05-23-2019, 08:43 PM   #27
Scooby Specialist
Member#: 460907
Join Date: Jan 2017
Chapter/Region: RMIC
Location: Colorado
2016 WRX


In regards to pump gas yes, but I'm asking about in regards to ethanol content (if you had quoted the whole post this would be obvious). How does forcing a car at a lower octane rating to run leaner AFR than it is meant to qualify as a safety feature?

An E30 tune targets (generally) about 12.5:1 or a lambda of .85.

An E15 tune targets (generally) about 11-11.5:1 or a lambda of .75-.78.

How does forcing a car that has E15 into a leaner AFR/Lambda qualify as a safety feature? Forcing an E15 tune to run 12.5:1 (.85 lmabda) will cause excessive knock and could potentially throw rods through blocks.

Theres a reason the guy selling the tunes makes it clear having the right e content is paramount or the car will blow up. FTCL isnt gonna save anything with this scenario.

Try again Stij.
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