PIR4TE
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Yes I did read you're post there are usually people who disagree so was just asking... so if I add some forced induction it would be worth it but otherwise dont bother
Mate it would not be worth the work to be compatible for your car, no. I saw a 5% increase at the wheels after a tune, which is typical at 11:1 CR. I suspect gains would be higher in an LFX due to higher static and dynamic CR (around 11.7:1).
The below chart is not mine but shows unopened stock cam gains on a VE 6.0 using e85:
Basically it is worth tuning and using it if your car is compatible (13-18rwkW) otherwise if you are chasing performance you have to weigh up the cost of 5% moar power. If you are upping CR or forced induction then it's a no-brainer.
Here is the accompanying article which although a bit dated is a good overview:
http://www.hp-f.com.au/about-2/hpf-news/green-power-ve-e85-flex-fuel/