So do I have a correct grasp on this?

[hypergenesis]

Alright so I am going to being tuning as practice with my current setup before I install my small16g and what not.

From what I understand to get the LTFT Lo and LTFT Mid correct you first need the airflowperrev floating around .25-.28 and then since Im using a 2g stock maf I would need to make about a 15 minute drive with different loads and what not until I can correctly use the MAFCOMPadjust tool?

One thing I don't understand though is if you zero out the MAFccomp and then adjust for the desired airflowperrev then use the MAFCompadjust tool it sets my airflowperrev is around .21.

I already have my dead time at 330 and global at 47% .

Currently have 850CC injectors on the stock pump and FPR.

Yet again I am just doing this for practice before I install my s16g, walbro255 HP, Fuel lab AFPR, etc etc.

Any help is appreciated.

Also A post of the log will be made tonight since I saw a post from someone in R&D Racing

http://www.dsmtuners.com/forums/articles-tuning-ecu/262460-basic-dsmlink-tuning-guide.html

He stated that the car who is running a similar setup in a sense to take a 15 min log so theirs multiple values and loads for the MAFCOMP

Thanks

Armin

 

[doubleclutch99]

First set up your fuel page to the recommended injector settings for global and dead time. then go to your maf page and select the 2g or stock maf .
You should be logging combined fuel trim, maf raw, airflow per rev, and maf then fire up the car. try not to make any adjustments until the car is at full operating temp so the adjustments you make will update the fuel trims.
Then make adjustments if needed to the maf to get it to idle with airflow per rev around.25 . you'll watch maf raw at idle and move the airflow slider closest to the same hertz your idling at to dial in airflow per rev.
Then watch combined fuel trim . ideally you want plus or minus 5 % or less . and you can adjust that with the injector deadtime. once you have those things in order you can go for a cruise and then do the maf comp adjust. and then post up a log. i hope this helps.

 

[hypergenesis]

I already know that I have to retune all the combined FT and most likely reset my LTFT to have it all relearnt. I have basically been driving after I got my airflowperrev about .25 - .26 and then just ran narrowband o2 simulation to keep the AFR in check.

Heres 2 15 minute logs. I also have a 30 minute log of cruising / driving through semi-hilly areas as well if needed be. The 2 15 minute logs are under different loads while driving as well.

Armin

EDIT:

Well all of my logs are too big to upload to the forums, there isn't a way to edit the length of a log is there?

 

[Imback]

I only need a 3 minute clip on a fully warmed up car too see whats going on. Get to it.

 

[hypergenesis]

Really ? Then what about for mafcomp? I read with the stock MAF I need like a 10 min run. But alright Ill get one up before I go to work today.

Heres the log

 

[doubleclutch99]

Put the correct injector info in your fuel settings page. 910 cc's isn't what it should be if your running 850's. if you look at your combined fuel trim at idle . the ecu is pulling a negative 28 percent fuel out suggesting you have too much fuel and then your maf comp is in the positive which will add more fuel as well. put in the correct injector numbers on the fuel page and save to ecu. then zero out the maf comp and start from scratch. then post up again.

 

[hypergenesis]

Wow didn't know I messed up on the injector size. Alright will do and ill post the info
Ill post another log before tonight
Thanks
armin

how are they at 910??

Its on 47.3 psi for the base pressure and 330 deadtime as said by

baseinjectordata [ECMTuning - wiki]

Their FIC 850s and thats what that says to put all that too unless im missing something.

Heres a new log with me zeroing out the mafcomp
I ended up tinkering and paying more attention to the videos I believe I got my CombFT and Airperrev correct at idle and started messing with the MAF Comp at lower rpms.

 

[doubleclutch99]

Pull up the log and hit ecu config at the bottom of the log, then click on the fuel tab. towards bottom center of the page hit calculate. now you should be able to see the injectors are set at 910cc's and 37.5 psi . change those to the correct settings and select use, then save to ecu. now you can redo your setup. and you should be good. the log looked alot better but if your settings are off they will be really off at wide open throttle. it looks like you got the idea.

 

[hypergenesis]

Well I know for a fact the settings aren't off I double checked along with resetting everything and redoing it.

So am I in a good standing with my idle and cruise?

Anyone have some comments or concerns or am I ready to start with wot?

Thanks again
Armin

 

[doubleclutch99]

Yeah your log looks fine . to me anyway.

 

[hypergenesis]

Thanks for helping me through this and with the topic. Funny how there's a 72 page topic from like two or three days ago about tuning and now everyone else has disappeared .

Armin

 

[doubleclutch99]

The only thing that bugs me about your log is that the fuel settings i see says your global is set to 910 cc's and 37.5 fuel pressure. i might have to email Tom Dorris and see if theres a reason i see something different than you do on the log. it doesn't make sense to me.

 

[hypergenesis]

I honestly don't know I opened the same file through 3 different computers my CC is at 854 cc/min for some reason it wont stay just at 850 and base fuel pressure is at 42.6 psi I dont get why your seeing that instead.

Armin