MartinFranck/Projektstate (2006-03-16 04:43:08)

Ignition on a Mini-Turbo (No injectors)

Maximum planned boost is 0,8bar = 11,76PSI = 80Kpa, so max MAP reading will be 180KPa.

Planned rev limit is 7500 RPM


Project state

DONE

TODO


Sensors - already mounted:


Trigger

MartinFranck/Pictures

The primary trigger input channel must be set up with the relevant jumper to VR-type input (so LM1815 is used).

I have uploaded new and better pictures of the board, they can be seen here: MartinFranck\Pictures


Ignition

Wasted spark: 2 channels for 4 cylinders.

I can´t figur it out with the starting dwell, I have looked on DummyIgnition. But if I start carefully with 2.5 msec, is´nt that okay too start with?

2.5 msec

x=2500/64 x=39 Hex(39)=27

so:

ign_dwelll4=27 # hex(27)=dec (39) ; 39 * 64 us = 2500 us dwell


Pin connections and h[2] table

Pin connections can be seen here .....

Some very important settings like

h[2]=05 00 05 00 05 00 05 00


config.txt

http://www.vems.hu/files/MartinFranck/MFConfig.txt


Ignition advance table

described in the n[ ] table (8x8 or 16x8)

Obviously, lower ignition advance is needed at highy MAP (> 100 kPa is possible because of the turbo). This means n[7] will hold lower values than n[0]

The following kpa and rpm ranges could be used (or other can be good too):

r[0] = 07 ... <5 RPM values of your choice> ... 40 48 (Also which format is the numbers)

k[0] = 18 40 64 90 B0 ... <2 values of your choice> .. FF (18 40 64 what is these numbers in e.g Hex ?)


You can take a look at my table file, it has plenty of hints should be enough to get you going:

http://vems.hu/files/DaveBrul/tables.txt - DB


Question

Q: Have I understood it correctly, that if I want the ignition advance too be 30 deg, that i then should multiplicat with 2, so that I should write 60 deg = 3C (Is this correct)

A: That is incorrect, the timing unit of the ignition map (n) and ign_crank_advance is 0.25 degree. Therefore, 30 degrees = 30 x 4 = 120 = 0x78.


Tachometer problems

Q: Tachometer problems, my tachometer does not showe the correct RPM because I am using wasted spark, can I connect the Tachometer to the V3-controller an get the correct RPM, ore are the other obsentions ?

A: How is it attached right now? You should use an unused ign channel pin on EC36. I see you use two wasted spark coils, attached to EC36-34 and EC36-36, and that its a four cylinder. Attach the tach wire to an ignition output, and your add the value for that channel to every fourth h[2] array element.

The Tacho is conectet to the wiring from Pin 12.

My h[2] tabel is curently like this: h[2]=05 00 05 00 05 00 05 00

The wasted spark coil is cornectet too pin 12 (cyl 2-3) and 35 (cyl 1-4)

If I have understood you correctly the h[2] should like this if I use ign channel 01

h[2]= 05 00 01 05 00 01 05 00 correct me if I am wrong

A: I think that is correct; can anyone else comment?

Q: When I try too comunicate with the V3-controller true megatune I get the folowing message

Controller voltage too low for reliable FLAS-Burníng

But I have trie too use a separate power supply (220v-12v), but it do not help, what can be wrong

A: Some people have had problems with operating a v3 controller with computer power supplies which are ~1A. You may need to try with an actual automotive battery.