MembersPage/AutoVeltiosis (2010-04-01 20:59:07)

I use VEMS V3.6 on my dragcar powered by a cbr1100xx engine. Until now the engine was running on four carburetors plus nitrous and the performance was very good (8.7sec@402m). I turned to fuel injection and VEMS in order to use all the extra racing features (like launch control, shift cut, etc) and be able to have a more precise engine control.


Firing sequence: 1,3,4,2

Ignition outputs (wasted spark/2 coils):

cyl2 EC36-pin36

cyl4 EC36-pin34

cyl3 EC36-pin36

cyl1 EC36-pin34

Injector outputs

cyl2 EC36-pin19

cyl4 EC36-pin20

cyl3 EC36-pin8

cyl1 EC36-pin7

Other outputs in use:

fuel pump relay EC36-pin15

NO idle air valve because injection bodies have special air valves for idle controled by water temp (almost all injection CBR engines).

Shifter relay EC36-pin4

TPS original pinout (EC36-pin1/29/AN.GND)

CLT IN original pinout (EC36-pin14)

Prim. Trigger original pinout (EC36-pin27/AN. GND/ Shield)

No other inputs/outputs are used.


SOFT/FIRM

In the past (1.0.73 firmware) I was using MegaTune software with no problem.

answer this questions please

I configured the ecu myself from the start and it was almost as easy as any other ecu I have used until now. I have not saved the config file (my fault).

I used also the VemsTune0.10.20(2010.03.08) and the firmware uploaded on VEMS V3.6 is 1.0.73.


TRIGGER

I use the original trigger wheel and VR sensor of the cbr1100xx with no problem. The cbr1100xx (carburated model) uses a 9teeth trigger wheel with one big missing tooth (later injection model had a 12teeth trigger wheel with no missing teeth).

cbr1100_trigger.jpg

It's a 12-3 pattern (toothwidth=30 degrees).

Unfortunately this is not supported with 1.1.x firmware, you can only use N-2 or N-1 pattern as set in the primary trigger options. You might need to use 1.0.x firmware for now with this pattern.

The following Trigger Setting were tested as long as I use the Megatune and were proven to work fine with 1.0.x firmware. It's not a MegaTune / VemsTune issue. It's an 1.0.x / 1.1.x issue. 1.1.x times from the last possible tooth.

THE VEMS WAS FUNCTIONING PROPERLY

WHEN SENT TO ME BUT AFTER THE FIRMWARE CHANGE ALL OUTPUTS ARE MESSED UP.

Now I use Firm 1.0.73 (I have not changed anything in the wiring)

and everything works fine. Engine fires up and is tuned very easy.

I believe its clear for you now that:

1. Its not the wiring

2. Its not my settings that have messed up the outputs.

Probably its the firmware change

Yes, that is very likely. If the instructions for firmware upgrade on GenBoard/UnderDevelopment/FirmwareChanges are not followed, than config is simply invalid. That seems to be the case.

I have uploaded my working config in the files area.


MAP sensor

Use the onboard MAP sensor if the assembled controller has internal MAP and nipple (between the EC18 and EC36).

If the assembled controller is ordered with "offboard MAP" than EC18/6 (see the paper shipped with the device).


Coolant temperature sensor

ECU is not responding on coolant bins/firm 1.0.73 because the internal pullup (2k7) is ment for appr 2000 .. 2252 .. 3000 Ohm sensor, not a low resistance sensor like the CBR1100 has:

Stock Water Temp Sensor (CBR1100XX)

C/Ohm

15/785

20/570

25/440 Surprisingly low resistance. Appr 19.5% of standard 2252 ohm.

30/355

40/237

50/157

60/107

70/74

80/55

90/40

100/29

Thanx for the precise specification in your query (3..4 points are usually OK with NTC sensor; the 25C point helps a LOT. Thanx!)