Or an interesting way to avoid correctly scaling for larger injectors ...

 

It doesn't matter what AFR is on the map, the NB O2 will keep the burn at 14.7 in closed loop no matter what is on the table, even while highly diluted, fuel economic exhaust recirc which only activates in closed loop.

Wondering if there's a way to fudge the front O2 to run leaner than stoich to save gas, no reason not to run lean catless anyways.

 

Both cars have only TBE. Injectors are stock!

 

I know this is doeable with a zeitronix or innovate. but it would be great if we can change this using ecu flash. being able to do this would definitely yeild better fuel economy while in close loop.

 

Assuming that his car doesn't have the Mods to the Open Loop Load Maps, or, maybe I am just getting to used to tuning IX's and doing that mod right from the get-go.

 

You can by forcing the car in open loop during cruise with the open loop tables.

 

maybe if we can know the voltage of the nb at 15.5 afr (say x volts), we can put a simple electronic circuit between the nb and the ecu which will, when reading x volts, convert it to the voltage that the nb gives when reading 14.7
ofcourse the circuit will have to also offset the nb voltage when it's reading 14.7...
basically the circuit will have to switch the whole voltage vs afr curve...

what do u guys think??


Rgds+

 

^^ yeah that is what i have setup as of now until i get a zeitronix. is there a disadvantage when you cruise in open loop compared if you are in closed loop? i'm pretty sure there is since i have to set up my cruise block around 15.7 to see some fuel savings.

 

yeah cuz the egr doesn't work when in open loop...

 

here's mines....mods are still TBE, 720cc, invidia o2, and last but not least #65 pill please all comments welcome...i'm still in the early stages of tuning for boost @ 23psi so it's conservative in timing and fuel, what do u think of the wgdc table for a 65 pill is it ok?. advice is greatly appreciated..o almost forgot it's 91octane

 

here's another log with lower boost/load on 3rd gear...the previous pulls were incomplete

 

Why so rich?
1* at peak torque?

 

originally @ 4...but when i started playing around with the wgdc #'s i lowered it as a precautionary playing with 91octane. maybe too much huh?

 

Some cars you can only run 1*, mainly depending on boost. I would start leaning out your AFR and see how the car reacts, then start fine tuning the ign timing.

Looks like you right on track so far.

You should be able to run some more boost as well, 20-21psi is just starting on the 9's.

 

thanks for the comment...i've read one of your threads on socalevo regarding the gains in boost vs. timing and was leaning towards boost instead. do you think i should aim for higher boost eg:24psi or more timing with my 65 pill i don't think i can go too far cuz it's almost maxed out.