set up EIO for E85?

[Runn WS7]

Since my PCM is commanding 9.76 and the EIO thinks that the car is running on gas, How do i fix it?

AFR % error is huge as you can understand.

[S2H]

you dont need to command 9.76

all you need is for it to stay the same..commanding 14.7....

the pcm doesnt care what fuel you have cause you dont have a flex fuel vehicle..so theres no sensor to determine that its e85

basically you need to tune with yoru wideband to 14.7(it doesnt read 14.7 it really reads lambada 1.0)

lambada 1.0 for E85 will be equivelant to 9.76 but it depends on your wideband settings on what it will show.....
if its set in gas mode its lambada x 14.7
if its set in alcohol mode its lambada x 9.xx(or something like that)
the sensor does not read A/F in AFR values..it reads them in lambada values...lambada 1.0 is stoich burn(reguardless of what tipe of fuel you are using) lambada of .85~.88 is roughly where the most power and torque is for every fuel..e85 benefits from being able to continue even richer than that and still gain in power...


it taks lambada and multiplies it times a value to output what you see as an AFR value


so to answer your E85 question...

command it like gas...
read it with wideband like gas
you dont ned to do anything different to tune e85

all you need is about 40% bigger injectors or a rough 40% increase in fueling total

oh..by commanding 9.76...its like saying lambada .66...LOL

[Runn WS7]

Yes i know all that, I was asking if it was possible to get hptuners to show 9.76 at lambda instead of 14.7.

But since i rum my car on E85 i have changed my stoich to 9.76, that way the cranking fuel and more dont need to be tuned. But when you change the stoich the EIO uses that number in afr error and when compared to the WB signal that is showing 14.7 you understand my problem.

I just thought it was possible, maybe something to put on the to do list?

here´s the car at idle.

[S2H]

Yes i know all that, I was asking if it was possible to get hptuners to show 9.76 at lambda instead of 14.7.

But since i rum my car on E85 i have changed my stoich to 9.76, that way the cranking fuel and more dont need to be tuned. But when you change the stoich the EIO uses that number in afr error and when compared to the WB signal that is showing 14.7 you understand my problem.

I just thought it was possible, maybe something to put on the to do list?

here´s the car at idle.

teh fact of teh matter is that you have to set up your wideband equation to show what you want it to read...
it reads 14.7 in HPT software cause your equation is designed to show 14.7

you could do some complex math in the custom PID's and convert everything to lambada..then convert it back to e85 values if you wanted to....
but AFR error is still commanded vs real AFR


so let me try to do some math and see what I can do

[S2H]

ok..so heres a solution.....

make a pid for Lambada for your EIO..
I just set this one up for the LC1...lambada range of 0.5~1.5

if you have your wideband set up for a custom AFR then you need to eithet look and see what it says teh lambada values are for it to set up the equation properly or you need to do some simple math..lambada = AFR/afr multiplier

10-18 AFR(like mine is set to) would be
(lambada = 10/14.7)~(lambada = 18/14.7)
0.68~1.224 lambada range
so EIO would be volts/9.19+0.68


and then set up a custom PID for e85 AFR
..

then your AFR error *should* work correctly with your 9.76 stoich value in your PCM