Tuning for E10

[WHYTRYZ06]

I have a 2001 z06 SD tuned w/ efilive.... I do all my own tuning....

ok here goes.....

Should I set the stoich at 14.63(GAS) or 14.12(E10) THESE ARE THE STOICH VALUES THAT I USE...

Does the E10 make a difference in fueling @ WOT? Any gas w/ ethanol should technicaly be richer depending on how much ethanol is added

Now up here in the northeast all the pumps use E10.... so what u think? remember Im sd tuned, so no maf for corrections....

thanks

[5.7ute]

If using E10 set the stoich value to 14.12.
The stoich value needs to be correct for the pcm to inject the right amount of fuel. (Remember the pcm uses EQ for commanded fuel not AFR.)

[WHYTRYZ06]

If using E10 set the stoich value to 14.12.
The stoich value needs to be correct for the pcm to inject the right amount of fuel. (Remember the pcm uses EQ for commanded fuel not AFR.)

Rite all we have here is E10.... I use AFR not EQ.... its a preferance thats all

[mr.prick]

I don't think {B3601} really does anything other than convert EQ into AFR.

If you change {B3601} you will need to change your WBO2 output to match or
make new calc_pids to convert voltage to AFR and a new BEN.

IMO {GM.EQUIVRATIO}>{GM.AFR}
Commanded AFR ≠ {B3601}
I have calc_pids for converting EQ & Lambda to AFR and BEN from EQ

[5.7ute]

To keep it simple, we need to go back to what we are trying to achieve, which is a certain amount of fuel to suit the amount of air in the cylinder. This is done by varying the pulsewidth of the injector to suit the condition.
Pulsewidth is calculated from airmass/AFR/IFR multiplied by 1000 to give us ms.
Aimass is derived from the VE table.
AFR is {B3601}/the commanded fuel in EQ.
IFR is {B4001}
If {B3601} is incorrect for the fuel used, actual will not correspond with commanded AFR unless one of the other tables is fudged. 99% of the time it is the VE table since this happens during the AutoVE process.
For instance, say you are shooting for an AFR of 12.72:1(EQ 1.15 with pump fuel) with 14.63 in B3601 with an airmass 0.92 G/cyl. IFR of 5 G/sec.
0.92/(14.63/1.15)/5*1000
0.92/12.72/5*1000 = 14.4654ms
When in actual fact you needed
0.92/(14.12/1.15)/5*1000
0.92/12.27/5*1000 = 14.9959ms
This leaves a substantial shortfall of 0.5305ms that needs to be addressed. Usually as stated earlier by misreporting the airmass in the VE table.
Hope that makes sense.

[5.7ute]

I don't think {B3601} really does anything other than convert EQ into AFR.

It has to mr.prick, otherwise the pcm wont know how much fuel needs to be injected.

[WHYTRYZ06]

I don't think {B3601} really does anything other than convert EQ into AFR.

If you change {B3601} you will need to change your WBO2 output to match or
make new calc_pids to convert voltage to AFR and a new BEN.

IMO {GM.EQUIVRATIO}>{GM.AFR}
Commanded AFR ≠ {B3601}
I have calc_pids for converting EQ & Lambda to AFR and BEN from EQ

I changed my wb02 AND B3601 to read 14.12 w/lm programmer I have an lc1 then I used this custom PID (JOECAR, made for me).... {EXT.AD1} * 1.923 + 9.614 and my wb gauge dont match whats on efilive....

Is my custom PID correct?

ANY IDEAS?

So now I changed B3601 to read 14.12 and my LC1 setting to read 14.63 afr and my custom pid is this....(EXT.AD1} * 2 + 10 and my WB gauge reads the same as efilive...

weird huh?

[5.7ute]

The stoich setting in the LM programmer only changes the AFR on the screen. The analog or serial output is based on the lambda reading (inverse of EQ)

[WHYTRYZ06]

The stoich setting in the LM programmer only changes the AFR on the screen. The analog or serial output is based on the lambda reading (inverse of EQ)

HUH? im lost.. please explain in better detail

thanks

please look at this thread too...

http://forum.efilive.com/showthread....010#post119010

[mr.prick]

The analog signal is going to be slower than digital,
so if it's off a little don't worry too much.
Innovate stuff can only be programmed to precision .1 (14.6) and the PCM setting is precision .6 (14.628573)

To be able to check your expression we need to know the min & max Lambda & voltage
set in the LMProgrammer software and the value of {B3601}

I tried to explain how to match WBO2 output to {B3601} here.