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pheoxs · 10-02-2013, 01:02 PM

They both have advantages and disadvantages.

W/M
Pros: Only used when in boost typically (depends on setup) so you don't use as much of it. Tuning is typically easier because flex fuel needs to calculate the % of ethanol where as WMI typically has 2 tables, one for normal, one for when you don't have any flow or you run out

Cons: Limited supply, more expensive, and rely on fail safes if you run out and don't notice or pump fails

Flex fuel:
Pros: Larger tank, no real risk of running out, no relying on a fail safe detecting a loss of fuel, cheaper to run

Cons: Risk of ethanol damaging fuel system (fuel filters etc), more expensive to buy the flex fuel sensor and install and such. Tuning may be more difficult if the tuner isn't already doing flex fuel tunes.

If i could run E85 I would, but we don't have it here so instead I have to do WMI

10-02-2013, 01:02 PM	#2
pheoxs Hold my beer n watch this Join Date: Nov 2012 Drives: '14 Fiesta ST / '91 240sx Location: Calgary, Alberta Posts: 782 Thanks: 214 Thanked 301 Times in 177 Posts Mentioned: 8 Post(s)	They both have advantages and disadvantages. W/M Pros: Only used when in boost typically (depends on setup) so you don't use as much of it. Tuning is typically easier because flex fuel needs to calculate the % of ethanol where as WMI typically has 2 tables, one for normal, one for when you don't have any flow or you run out Cons: Limited supply, more expensive, and rely on fail safes if you run out and don't notice or pump fails Flex fuel: Pros: Larger tank, no real risk of running out, no relying on a fail safe detecting a loss of fuel, cheaper to run Cons: Risk of ethanol damaging fuel system (fuel filters etc), more expensive to buy the flex fuel sensor and install and such. Tuning may be more difficult if the tuner isn't already doing flex fuel tunes. If i could run E85 I would, but we don't have it here so instead I have to do WMI __________________ Nolan Last edited by pheoxs; 10-02-2013 at 01:39 PM.