V2 Q about stoch setting

[[email protected]]

on F8 what happens if you change the stoch setting on the v2 can you get it display /log a higher or lower value ??

15764

[joecar]

You set it to the default value that your wideband uses.

[[email protected]]

hi mate
could you pleas elaborate on that for me
what value should i be putting in ?
tech edge 2j9

what im trying to do is get the wideband to read 1.4 AFR richer to match the dyno readout dyno 10.1 TE wide band 11.5 ,I have re calibrated the TE in free air and also tried a new sensor
thanks

[joecar]

For example:

say your wideband assumes stoich is 14.7 (i.e. for E00 petrol/gasoline)...

then say you run a tank full of E10 (stoich is now 14.2), at stoich your wideband will still read 14.7;

but if you set the default to 14.2 (either in the wideband or in V2), then V2's wideband AFR pid will now read 14.2 at stoich.

[joecar]

Also note, you should be using Lambda to tune with (so you won't be dealing with differences in stoich)...

lambda = 1.00 --> stoich/CL.
lambda = 0.86 --> NA load.
lambda = 0.78 --> Boost load.

[[email protected]]

HUMMM
what im trying to do is get the wideband to read 1.4 AFR richer to match the dyno readout dyno 10.1 TE wide band 11.5 ,

what value would i have to put in do that
thanks

[joecar]

14.7 * 10.1/11.5 = 12.9


Try setting it to 12.9.

[[email protected]]

thanks mate
appreciate the help
cheers

[[email protected]]

14.7 * 10.1/11.5 = 12.9


Try setting it to 12.9.


it does drop it :thumb_yello:but it looks like about 2.2 ish AFR but i will have to do a WOT log to to compare it to my other WOT log on full boost
cheers

[joecar]

Try (12.9+14.7)/2 = 13.8

[[email protected]]

HI MATE

i my have jumped the gun saying it went down 2.2 afr
i was looking at the log in general

when i compare apples to apples both logs showing 18% throttle and the same rpm and in the same gear at the same speed it did show 1.5 afr drop as you first suggested set at 12.9
going to put it on the dyno to day to take some fuel out of it now i know its way rich so when we get that sorted ill try to get the v2 to read the same as the dyno
will report back
cheers

[mr.prick]

wow! :cool:

eq1 can be defined now. :banana:

[[email protected]]

i haven't forgotten about this thread i just waiting for a run on the dyno with the stoich setting changed
ill post the logs if some one tell me how ?

[joecar]

See post #2 here, start at step #5: Hosting-an-Image (http://forum.efilive.com/showthread.php?3064-Hosting-an-Image)

[joecar]

Mike is right, do it in EQR or Lambda (PE for NA you want 0.86 lambda, PE for boost you want something like 0.78 lambda, regardless of fuel).

[[email protected]]

so is lambada a finer setting ? ( goes from 1 to .7 were as AFR goes from 14.7 to 11 on average

[joecar]

Lambda is not dependent on the stoich AFR of the fuel being run (the stoich AFR of the fuel varies with additives.

For example: E00 stoich is 14.7, E10 stoich is 14.2, E85 stoich is 9.7


Lambda also avoids the problems of different widebands assuming different values for stoich.

Regardless of fuel being used:
Lambda 1.00 --> this is closed loop.
Lambda 0.86 --> this is NA/non-boosted WOT/load.
Lambda 0.78 --> this is Boosted load (can be lower).

[joecar]

Also note that equivalence ratio is 1/lambda


you can use equivalence ratio instead of lambda if you like (but now take note that EQR for Boost is 1/0.78 = 1.28.

[[email protected]]

hi Joe
thanks ill put the lambada pid back in the v2
i did have it all when you put wideband pid in put it seams like with some later update you need to activate it separately