1497 replies to this topic

[Goosenka]

Soumds easier to get a 777 off the ground

[CHILL Gone DUTCH]

Ive just read the wide band fuel lesson section 9.15 in instructions five times and still dont completely understand it

 

 

[CHILL Gone DUTCH]

are you getting to the hotel early on friday nick, sounds like we might still have a bit to do before we go on track.

 

[NickB787]

I will be doing that, Just hope my wideband is working ok.

[oakmere]

Process is straight forward: 1) Start fuel learning session (PC can be turned off at this point) 2) Eml should light as soon as you hit the throttle. 3) As you drive the car the eml will stay off as the cells are learnt. 4) Once you are happy the eml is off much more than on switch PC on do not turn the engine off. 5) click file save calibration as fuel learn 1. 6) now click on measurements and process measurements this may take a minute or 2. 7) select smooth and auto update non learnt cells. 8) click program ECU 6,7 & 8 can be done from the saved file. This sounds a lot but it only takes a few minuets. The priority is alway to save before switching off or the data is lost. To see if the changes have been made open the program twice open the base on one program and connect the PC to ECU and select read ECU. You can compair the two fuel maps. Hope this helps

[CHILL Gone DUTCH]

Process is straight forward: 1) Start fuel learning session (PC can be turned off at this point) 2) Eml should light as soon as you hit the throttle. 3) As you drive the car the eml will stay off as the cells are learnt. 4) Once you are happy the eml is off much more than on switch PC on do not turn the engine off. 5) click file save calibration as fuel learn 1. 6) now click on measurements and process measurements this may take a minute or 2. 7) select smooth and auto update non learnt cells. 8) click program ECU 6,7 & 8 can be done from the saved file. This sounds a lot but it only takes a few minuets. The priority is alway to save before switching off or the data is lost. To see if the changes have been made open the program twice open the base on one program and connect the PC to ECU and select read ECU. You can compair the two fuel maps. Hope this helps

You explain it better than the instructions And don't forget to save the smoothed file

Edited by CHILL Gone DUTCH, 16 July 2013 - 08:35 PM.

[NickB787]

yes it does thanks

[NickB787]

Process is straight forward: 1) Start fuel learning session (PC can be turned off at this point) 2) Eml should light as soon as you hit the throttle. 3) As you drive the car the eml will stay off as the cells are learnt. 4) Once you are happy the eml is off much more than on switch PC on do not turn the engine off. 5) click file save calibration as fuel learn 1. 6) now click on measurements and process measurements this may take a minute or 2. 7) select smooth and auto update non learnt cells. 8) click program ECU 6,7 & 8 can be done from the saved file. This sounds a lot but it only takes a few minuets. The priority is alway to save before switching off or the data is lost. To see if the changes have been made open the program twice open the base on one program and connect the PC to ECU and select read ECU. You can compair the two fuel maps. Hope this helps

 

this is ok for up to 4k and it will self learn after, or as an earlier post said shouldn't do wot i.e full chat until wideband fitted. what about those without wideband?

 

you coming to the National?

Edited by NickB777, 16 July 2013 - 09:09 PM.

[CHILL Gone DUTCH]

Ive just been reading instructions again from start to finish,

 

and in section 9.8 which is the way i have been mapping but i have been WOT because of the lower power i am running getting as many boxes fully green as possible.

 

But you need to see section 9.15 if your going to use wideband to do your fueling

( 9.8 states 

Although no problems have been encountered while using this mode, the user should consider if the particular engine will be able to handle the extra stress of a leaner mixture. It is advisable to give highly boosted engines some time (30 seconds or more) to recuperate between two full throttle runs and do the full throttle learning in second gear. When in doubt, only use this option for normal driving calibration, and use a wide band sensor to do the full throttle calibration, there is also a method available for calibrating the full power fueling using a wide band sensor, for more info on how to do this, see also: Finding the optimum full power fueling using a wide band sensor

 

if you consider your engine wont be able to handle the leaner mixture it gives a different way of doing the fueling using wideband but also using the power measurement to check the wideband sensor is working first. and then processing the AFR from there.

 

But i have looked at martins way and believe that way will work to if the wideband is definitely working 

 

 

Edited by CHILL Gone DUTCH, 16 July 2013 - 09:30 PM.

[CHILL Gone DUTCH]

What are your plans today nick

[oakmere]

Unfortunately I can't make the national pesky holidays. Do the normal driving mapping the have a look at your IAT's from a logging file at say 5000 rpm loaded run if they look ok then map for this area. Best option is to get the wideband working. You can then do flat out runs and it will alter the fuelling to match your AFR map. You have to process the results and save the results as per the above. What I am not sure about is the gap between narrow band and wide band mapping. So narrow band covers map and rpm to say 0 to 80 kPa - 0 to 5000rpm then wide band dose 100 to 250 kPa - 0 to 7200 rpm. I would send all the results to Peter and he will have a good idea of what the missed values should be.

[davemate]

Dont forget when you have a map to send it off for Peter t have a look through, he is a great chap and very good at helping

[Exmantaa]

Unfortunately I can't make the national pesky holidays. Do the normal driving mapping the have a look at your IAT's from a logging file at say 5000 rpm loaded run if they look ok then map for this area. Best option is to get the wideband working. You can then do flat out runs and it will alter the fuelling to match your AFR map. You have to process the results and save the results as per the above. What I am not sure about is the gap between narrow band and wide band mapping. So narrow band covers map and rpm to say 0 to 80 kPa - 0 to 5000rpm then wide band dose 100 to 250 kPa - 0 to 7200 rpm. I would send all the results to Peter and he will have a good idea of what the missed values should be.

 

 

Not sure if you ment this, but the wideband option is only a logging/monitoring tool for the AFR's and you will need to make the necessary fuel corrections yourself. A fitted wideband will not alter the fuelling to match the AFR settings!

Therefore Peter mentions to do the closed loop NB learning sesion first, save all the changes to the fuel map and only then proceed to WOT runs with wideband monitoring.

(The NB area and WB will overlap, but there will be alway blank portions.)

[oakmere]

The software will calculate the necessary corrections and will update the fuel table according to the measured AFR and the programmed commanded AFR values. 5. Wait for the changes to be sent completely to the ECU. The progress can be monitored on the bottom of the screen. This is a new feature of the software!

[CHILL Gone DUTCH]

I've just read this whole thread WOW

[Exmantaa]

The software will calculate the necessary corrections and will update the fuel table according to the measured AFR and the programmed commanded AFR values. 5. Wait for the changes to be sent completely to the ECU. The progress can be monitored on the bottom of the screen. This is a new feature of the software!

 

yes, I read that the program will now do this, but you have to keep in mind that all those fuel table corrections are done on your pc AFTER a logging session. It will not do any fuel corrections during driving, unlike the NB closed loop mode where the ecu corrects the mixture always to 14.7 AFR. 

This should be no problem if the base map is halfway correct for your car, but something to keep in your back mind as you can blow up the engine @ WOT if your base mixture is too lean and your keep trashing it...

 

So complete closed loop learning first, then do a short WB WOT run, CHECK your AFR and update fuel map if needed. Do some more WOT runs, check/learn again etc.

Better safe than sorry...

[siztenboots]

the more cycles of updating the fuel map , the closer it will be to having 0% stft and ltft

 

this all relies on all components working well, if you have a weak injector, then like most software it makes big assumptions and will get further and further from actual setpoint

[oakmere]

I have noticed that the weather plays a big part in what the fuel trims are. This could be improved by altering the transient settings in the OBD software. With air intake temp currently around 40-45 degrees C the long term fuel trims are running at about -4 for idle and normal driving. That is approx -2% fuel.

[NickB787]

I loaded yesterdays map onto the ecu, i started the car and it felt a bit rougher than I remembered, so have decided to do the 0=4000 learning again, then check the power calibration to see if the wideband is working.

 

whats the tyre circumfrence?

 

also checked the oat on startup and it seems acurate

Edited by NickB777, 17 July 2013 - 12:18 PM.

[techieboy]

whats the tyre circumfrence?

 

Measure it as it'll vary between tyres, pressures and tread wear. Chalk mark on the tyre sidewall and on the road, then push the car along until the chalk mark on the sidewall meets the road again and measure the distance between the two.