Hi :)
Need som help setting up my VEMS Motronic-55, on my AUDI RS2
Engine info:
- It`s an ADU engine, 5 high output coils with built in drivers.
- 720cc high-Ohm injectors. I have some 1600cc (4.5 Ohm, don't need power resistor)
- custom cams and ported cylhead
- JE pistons
- H-beam rods
- 82.5mm bore
- 92.6mm stroke
- Turbonetics gtk 650
- 89mm exhaust
- 034 motorsport high output coil pack (5 coils) standar POS not used.
Q: So my high Ohm 720cc injectors need power resistors? I think mine is the same as sold in the vems shop. Siemens deka 727cc@ 4bar
A: If you had written that they were high ohm you could've drawn your own conclusion = you don't need power resistors. Since you didn't write anything, I assumed they were low-Ohm, in which case you would've needed power resistors. It's _very_ rare to find high-ohm injectors larger than 500 cc/min,
Q: I have changed my mind, and want to go for the NTC type IAT sensor. My vems is set up for the PTC type.
What to do?
A: Remove the additional pull-up resistor on the PCB which is mounted on top of the regular pull-up for the IAT analog input. Other people might clarify with pictures of the PCB and where you must do the work.
A: I allso recived an e-mail from vems shop now:
Fortunately this is easy. Remove endplate (endplate only, 4 screws).You see a small resistor near the main processor, close to board edge, parallel to board edge.An 510 Ohm (0805 size SMD) resistor is piggybacked on a 2k7 resistor.Remove the 510 ohm, and you just converted back to a normal weak pullup suitable for NTC.
I guess this would be easy.
Q: I have some msq files for the motronic 55, but i can not understand the ignition outputs.. what is H[2]? and what does 04..00 stand for? Does this have any thing to do with the fiering order?
A: The H2 is the exact firing order of the ign outputs more info at this page http://www.vems.hu/wiki/index.php?page=GenBoard%2FManual%2FDigitalOut%2FTable
If the car is Audi s2 you will find some useful info in this page http://www.vems.hu/wiki/index.php?page=MembersPage%2FPeterJensen/AudiSwiring
Regards Peter
Q: Okay. If i understand. this should be correct when the firing order is: cyl 1-2-4-5-3
here:
EC36-11 points to POS CYL3
stepper-A Points to POS CYL5
stepper-B points to POS CYL4
stepper-C points to POS CYL2
stepper-D points to POS CYL1
Is this correct?
A: Yes.
Q: Would this match my Ignition Output?
A: You mean "injectors outputs". Not "ignition" ?
Reidar: My question is: does the picture of the "injector outputs" match my ignition output picture. is it the same firing order?
I also downloaded this config: http://www.vems.hu/files/MembersPage/MattiasSandgren/OskarNilssonsAudiSFour/oskar_optimized_power_20080506.msq
Q: It seem to me that this config fiers cylinder 3 first. (same engine) Any clue why?
A: Fires what? Injector or ignition coil? I guess you mean injector, and it doesn't matter on this mild engine, but it's good if it's done in firing order.
Reidar:
Both, injector and coil.. but I`m not sure why it`s done this way. so I`m a bit confused..
Q: What firmware to use? can i use 1.1.23 12x12?
A: Don't use 1.1.23. See this page: MembersPage/MattiasSandgren/OskarAudiSFour
Download 1.1.27 on the MegaTune page and go from there.
Q: How to upload tempsensor files?
A: You have to use the tempsensor_upload script that comes with the MegaTune package to upload a firmware containing the correct temperature tables, see EasyTherm and EasyTherm/SensorTable.
Q: When i downloaded megasquirt, there was a PINOUT picture included.. Is there a simular picture for the Motronic 55 plug?
A: Begin reading here: VemsAudiAan Take a look at the spreadsheet and as hinted earlier you can find a picture here: MembersPage/PeterJensen/AudiSwiring