OBD1 motronic tuning thread?

[TIGninja]

G/S?

No time yet. I will see what I can do over christmas vacation.

[B4S]

Gotcha .

[TIGninja]

So did anyone download that OBD1 aba bin I posted before they shut down the link? I need that file and we will get a working TP XDF going today.

[B4S]

I've got it. Does this work?

http://rapidshare.com/files/448973893/ABA_OBD1_AE.bin

[TIGninja]

awsome lets get our party on. I will post up a file to let you guys tune later.

[B4S]

Sweet

[TIGninja]

Open up your winols demo and load the chip file you have downloaded.This is what you should see.And move to the same location as I am at ~ B124



You need to have your winols set to 8bit and 255 right here otherwise none of this will make sense.



These are main fuel tables. There is a high throttle and a low throttle map that in this case is 16/16. There are other sizes of tables and after you have learned to use this you can actually learn how to make them whatever size you desire (I personally think the sizes are fine unless you vary your power band waaaaay up the range from stock).The location of the two maps we are working on is B124 and B248

The main part we want to look at now is the obvious area between the maps. This is the area where the scale of the maps are laid out (RPM and MAF in this case).If you take your curser and just write down all the numbers you see from left to right like this. Here are my chicken scratchings. Notice the curser is at B247 which is the last value we need for the layout. You are writing down the data numbers on the bottom next to the curser location.

[TIGninja]

Here is a nice example with pretty colors. Thank the guys at http://www.motronic.ws/ for this one.

[TIGninja]

Ok the first number we have is 57.57 will always be used in this ecu as a RPM point. So 57-16-5-5-5-10-5-5-5-10-5-15-10-15-15-101

Lets look at the last number (101) this is out last RPM point for this perticular map.The formula to make this number into something that makes sense is this 256-101* 40= 6200rpm. This is out last RPM point.The number before the 101 is the next RPM point (15). to figure out the RPM we take the 15 and mulitply by 40 for 400rpm. We subtract 400 from 6200 and we get 5600 for the secont to last rpm point. You have to continue to do this until you get all RPM point for the map.

800/1000/1200/1400/1800/2000/2200/2400/2800/3000/3600/4000/4600/5000/5600/6200

And there is half of it.

[TIGninja]

Ok im a dumba$$. Its been a while instead of 255 use 256 for your RPM calc.

[B4S]

I wondered about that, lol. I've been using 256...you had me worried I'd ufcked up .

[TIGninja]

Ok you guys I cant remember the scaling for the MAF and I cant find it. Its in grams per second and its probably 256-86=170 for the last number and then -10,-10,10 for the rest. Im waaaay to lazy and dont have a vag com to check it for me.

[B4S]

Yep, the max value is 170, and the smallest is 20.

20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 132, 150, 160, 170.

ready for the next lesson coach .

[TIGninja]

Ok I have low and high throttle timing and fuel maps,full throttle fuel map,and what looks to be a idle fuel map.

[VR6_Idaho]

Keep it up. Thanks for the efforts.

[tomslik]

I am so happy this thread is alive again. I still wish I knew how to do what I want with what your saying here. Need more fuel. LOL.

[losacker]

i was referred to this thread and so far it has delivered! thank you and i cant wait to see more!

[TIGninja]

There are some pretty good XDFs here for OBD1 VR6. I have not tested them yet to confirm they are correct but they look good. Tonight I will make a couple of changes to these and we will go through what is what.

http://tunerpro.net/downloadBinDefs.htm

[losacker]

There are some pretty good XDFs here for OBD1 VR6. I have not tested them yet to confirm they are correct but they look good. Tonight I will make a couple of changes to these and we will go through what is what.

http://tunerpro.net/downloadBinDefs.htm

do you happen to have any for an obd1 2.0? and is the bin you were working on a vr6 or 2.0? sorry im new at all of this and really tryinng to learn all i can. thanks!

[TIGninja]

do you happen to have any for an obd1 2.0? and is the bin you were working on a vr6 or 2.0? sorry im new at all of this and really tryinng to learn all i can. thanks!

The bin we are working with is a 2.0.We will have a XDF by the end of the week.

[losacker]

The bin we are working with is a 2.0.We will have a XDF by the end of the week.

thank you. this is great info!

[TIGninja]

i find tunerpro only corrects the checksum upon saving the altered bin . then as you say you have then upload the saved bin to the emulator again then all is good no checksum fault code

You will have to upload the bin every time you restart the car otherwise you will get a checksum code. You should be able to tune the car without check engine light wit emulator because the ecu only checks on startup.

[TIGninja]

Looks like when I get back from vacation I am going to be tuning a OBD1 VR6. I will try to document the tune as much as I can while its done.

[losacker]

2.0 XDF files anyone?

[Yoss]

:subscribed: waiting for someone else's hard work to save me money on my eventual turbo project

[Jefnes3]

:subscribed: waiting for someone else's hard work to save me money on my eventual turbo project

This is why no 'real' information is available....

People just like this....they cannot/will not contribute anything, yet want to results just handed to them.

-Jeffrey Atwood

[B4S]

I've got an xdf with all the maps, but they are not labeled. It was easy to do, all I had to do was figure out how to read hex, figure out where the main map list was in the bin, translate all that into a beta xdf, buy an emulator to do map tracing to start finding out which piece of code does what, and then start hunting down information on the factors and offsets for the axis values. I'm not quite ready to share it, since I'm not willing to take the heat if something goes wrong, or spend all day answering questions about stuff I'm still learning . TIGninja is kind enough to fill in the gaps, so patience is key .

I will say though, it's out there if you look for it . It's way better to know WHY you're doing what you're doing, than it is to have it spoon fed. That's what TIGNinja is trying to do.

[TIGninja]

I will say though, it's out there if you look for it . It's way better to know WHY you're doing what you're doing, than it is to have it spoon fed. That's what TIGNinja is trying to do.

This is mostly why I have put this out there in the manner I have. It is to get people to load the files into the software and look at it atleast. I will have more time when I get back from my vacation. Internet is very sketchy here in the philippines.

[B4S]

Just got a 94 Jetta 2.0 for a daily driver. Can't wait to test this stuff out .

[TIGninja]

Project canceled due to a few morons on this forum.

I come here and offered this to everyone for free and get nothing but disrespect from this forum.Why should I continue to offer this to these people is what I keep asking myself.

There is enough info in this thread to tune OBD1 already so use it and be happy. There wont be any development of the fun things like launch control and other things because I am so annoyed by this forum I just dont care.

[A2rebirth]

Project canceled due to a few morons on this forum.

I come here and offered this to everyone for free and get nothing but disrespect from this forum.Why should I continue to offer this to these people is what I keep asking myself.

There is enough info in this thread to tune OBD1 already so use it and be happy. There wont be any development of the fun things like launch control and other things because I am so annoyed by this forum I just dont care.

thats cool... have fun ttyl

[B4S]

[magner]

ignore the morons carry on with it here http://the-corrado.net/showthread.ph...to-remap-a-VR6 this is the old school way but much easier now with real time data trace

[Jefnes3]

Have you guys made any ~real progress yet?

Play with larger MAF's, Larger injectors.... ect?


-Jeffrey Atwood

[magner]

Have you guys made any ~real progress yet?

Play with larger MAF's, Larger injectors.... ect?


-Jeffrey Atwood

yes i have my obd1 running with 630cc injectors with a rock steady 14.7 afr at idle and cruise
11.8 afr at wot .. i have a violent bucking on transition to boost that i need to work on .if i just go wot it pulls threw and the bucking is gone