you are using all stock with an E85 mix? don't you need a new fuel pump? you are crazy !
Only thing a fuel Pump is needed for is if you are running E85 and want full potential...here is what I posted in another thread:
E50 is the highest concentration you can run with a Tune where you are getting full power on the Stock Pump. On my ST, everything else stock that was good for a 0-60 of 3.75. You get E50 by using an app to calculate how much E85 and 93(E10) to mix.
93(E10) - A tune from the same Company(ZFG) for 93(E10 - Percentage VA requires pump gas to have of Ethanol) was good for a 0-60 of 4.06.
E85, If you want to run it at full potential you need an upgraded HPFP(High Pressure Fuel Pump). It is a $1600 device.
ZFG offers an E85 tune that will work with the Stock Pump. It is turned back. Advantages is it is slightly quicker than a 93(E10) tune at a 0-60 of 4.01 for me. It also gains a 10th or a little more in the 1/4 vs 93. Other advantage is no mixing, just drive up and Pump.
Hope that helps a bit...
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