To be able to run E85 you need to
increase flow rate to reach the same mixture and air fuel ratio as for
Gasoline.
The best way of doing this is by changing the injectors to
bigger sized injectors.
Which injectors is to be used
Stock injectors is normally too small to be able to deliver enough fuel
for an ethanol converted engine.
The flowrate has to be increased by 38% to show the same mixture values
as for Gasoline. Use injectors which is as close as possible to 38%
bigger than your stock injectors. There is no benefits in using bigger
injectors than needed.
For example if you are
running ~200 cc stock injectors you will need about 240 cc injectors for
E85. The injectors has'nt to be exacly 38% bigger since the finetuning
is made in the software at step 2. You need injectors which has the same
impedance as your stock injectors. High or low impedance. High is about
12-16 Ohm and Low is about 2-4 Ohm.
Characteristics of E85
Fuel
E85 fuel has a stoichiometric value at 9,7:1 air fuel ratio, "AFR",
compared to Gasoline which has 14,7:1. Which means a mixture of 9,7
times of air for each amount of fuel. This stoichiometric point is where
exactly all oxygen is consumed and all fuel burned. "Complete combustion".
But the point for maximum power output is lower, more rich mixture of
air fuel ratio. This is tuned in the software, at step 2.
As long as the stock fuel
pipelines and fuel pump is in good condition there is no need to change
them even though its good knowing that E85 fuel is more aggressive to
the pipelines.
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