Hi,
hab mal wenig "gegoogelt":
"If you have a brown coding plug (not marked 91/95 or 95/98 for octane setting) under the bonnet located at the back on the right side you will see it is probably set to the side marked 'A'. It is reversible and there can be benefits to putting it on the 'B' setting.
This alters the ignition mapping to reduce the level of exhaust noise. Apparently there are areas in Europe (especially in Germany) that have very stringent noise regulations.
The upside of this change is that the 'B' setting produces much more torque at lower revs and makes the car much more responsive at lower speeds."
Und noch was:
Strange result with Plug A/B in tuned c20xe
Recently I tried to change the plug from A to B side to see what it happens. (I have camshafts and reprogramed ecu with rev limiter 7400rpm & ~13:1 AFR at full throttle)
The strange thing is that the idle speed was increased about 100 rpm on B side! I don't feel a difference in performance, only I am suspected that the engine misfiring sometimes a little more in low throttle with bad fuel petrol quality.
The strange is that I was remember before I put the camshafts and program that the idle on B side was 100rpm lower from A side and not 100rpm higher.
(I know that the correct side is from the side of the clip, so I can't be wrong).
Now the idle (on B side) is ~1000rpm, in A side was always at ~900rpm and before install the camshaft and program the idles was (in B side) ~800 rpm.
I forgot to check if (maybe the B side resistanse is failed) with an ohm meter and that gives a infinity or zero resistance. I will check.
I don't know what happened, this only can be seen in a dyno with a gas analyser, avans viewer but now I prefer the B side because I have more stable idle (1000 rpm). The programmer that made the custom chip in the dyno told me that he didn't know a way to increase the idle speed (only he gave some avans and more fuel for more stable idle) but now the problem was solve with +100rpm on b side and even more stable idle.
Now it is possible to play a little with vernier gears, and also see in the dyno if the A side have differences from the B side in performance.
At least, for one time the B side was proven that is better from A side in my case!
Strange but was happen...
I have c20xe m2.8 with an "unknown chipped german ECU" (bought in a junkyard from a gipsy guy) and Kaul Motrosport 268* camshafts 10,85mm Hub. Even though the limiter is at 6800, I consider this a really a good chip. Car is 179 HP on dyno.
But I have similar experiences:
-On a dyno "A" and "B" makes approx 5 HP difference (B is better) and
-idle is 900 in "A" and 1020 in "B"
Ich spinne mir jetzt mal was zusammen:
Also ich lese da raus, das auf "B" etwas mehr an Drehmoment bzw. Leistung, zumindest im unteren bis mittleren Drehzahlbereich, anliegen soll, dieses jedoch i.V. mit höherer LL-Drehzahl.
Das hat dann natürlich auch schlechtere Abaswerte zur Folge, vielleicht "soll" man deshalb nur auf "A" fahren ... :? :roll:
Naja, Ich habe mir schon vor Jahren den Schädel darüber zermartert und bin zu keinem Ergebnis gekommen.
Warum sollte es jetzt auch anders sein ? :lol:
Wie ich schon einige Beiträge vorher schrieb, meiner bleibt auf "A" selbst wenn bei "B" VIELLEICHT 5PS mehr anliegen sollten, Ich merke davon nichts.
Gruß,
ViSa
