MembersPage/AutoVeltiosis (2010-05-29 14:22:34)

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.

IMPORTANT NOTE: USE MAP SENSOR FOR ENGINE LOAD AND TPS FOR ACCELERATION ENRICHMENT. EVEN WITH 4 THROTTLE BODIES INDUCTION SYSTEMS (ONE THROTTLE BODY PER CYLINDER) AVOID USING TPS FOR ENGINE LOAD.


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)

MAP Sensor original input (EC18-pin6)

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.

Now I use Firm 1.0.73 and everything works fine. Engine fires up and is tuned easy.

I have uploaded my working config in the files area.


I use the original honda MAP sensor thta is attached on the throttle bodies. To adjust the sensor range in VemsTune set

Offset:

Range:


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!)