Flex fuel tune

[05 s2k turbo]

So when tuning flex fuel do u adjust fuel map when you put e85 in or just adjust the settings in the flex fuel parameters?

[Spunkster]

If you have been tuned properly for regular fuel, then you should only have to make adjustments to the flex fuel settings.

[05 s2k turbo]

For example im tune 93 on 15psi so it's got a proper tune but I want to turn it up to 20psi do I need to adjust the fuel map?

[Spunkster]

You should have your tuner make sure it is safe at the higher boost level.