Ok, I had mike on the phone the day after his kind proposal, and… he has been very helpful, even though my poor English and the long distance call made my understanding maybe not complete. So now I know my program for the next batch under the hood. I’m not home now, and the only thing I’am able to do is to browse internet and fry my brain on T5suite & manuals to make myself ready for the time I will be able to sink under passenger side dash…
So, what will be done, as per Mike’s priceless advises :
-connect a cansub connector for live tuning of the ecu
-connect switched power to pin59. This is supposed to be AC input, and maybe my Ecu thinks I have AC. Thus the erratic rpms when throttle close. Litterature is a little bit uncertain about this pin 59, so it’s worth to have a try, and see how the car behave with/without the pin 59 wired on switched power, and check/uncheck the proper box on T5 suite.
-connect speed sensor: not connected yet, but I do have the post 89 speedo, and no cruise control. So the 3 free pins on the connector behind speedo , I will connect : top pin to ground, middle pin to pin 39 on ecu, and lower pin to switched power. Is that right ?
Litterature is very very uncertain about this speed sensor. Althought most of the big T5swaps gourous seem to say that is’t not compulsory , I’ve read numerous time that drivability is much improved with the speed signal connected. Looking at T5 suite, I can’t see how drivability can be affected, exept this 1st & 2nd gear boost limitation. Still, it’s very worth to give a try.
-Connect a wide band lambda sensor .
-Check the correct advance figure. I looks like some of the Eeuroparts machined flywheels have some few tooth offset.
THEN, once all be done, time will be to play on T5suite, and tune it : it will be the first time for me.
BUT. Although I’m totally impressed by Dilemna & his mates for the work that they’ve done to make T5 suite (the knowledge is impressive, backengeeniring is unbelievable, the amount of word is unimaginable, and the dedication…I’m totally gratefull), I must say that T5suite both manuals… are not always very clear. I do have engineering background (long time ago), I did spend countless hours on the manuals and program (not connected to ecu yet), but I’m still uncertain about the correct path to tune Fuel…
Closed loop
Basicaly, the task is to alter cells in Insp_mat ! to have minimum correction factors in Adapt_korr!. Closed loops cells are the one with black surround.
I can also change Open_loop! Map to ask ecu to switch to open loop at a different load/rpm level.
Open loop.
This one is more tricky. My understanding is that you can ask T5 suite to generate a AFR map that will be calculated with all the other fuel factors. You can check here what your target AFRs are.
Question : I don’t see any change in AFR map even if I change values in Insp-mat! Is it normal ?
Then you take your car for a drive, run it in all conditions load/rpm/throttle, and you can generate the actual AFR map that you will compare to the target AFR. Then you can change values in the Fuel maps so that differences are 0:
Change values in insp_mat! For stable conditions (is it right ? )
Change values in all other maps for transient conditions Lacc_konst ! t Accel_konst !. (Lret_konst !, Retard _konst ! Fload_throttle_tab ! )
Then, in a second step, much more to check for knock conditions, boost control... I don’t know yet if I will keep boost control. I like the manual boost control. I intend to run always on premium fuel, use modest boost levels (15-20psi), I did upgrade my intercooler (chargecooler), and intend to be conservative with my ignition maps, and drastic for knock conditions maps (both ignition & fuel).
