jawel de onsteking vervroegd samen met het toerental van de motor. als de onsteking geen seintje krijt om te vervroegen, dus als het toerental stijgt, blijft ie hetzelfde als in lagere toeren.
http://www.raptorforum.com/index.php/topic,2990.0.html
lees dit topic maar.
Toegevoegd na 3 minuten:
Well, It's time to eat some crow. I was a skeptic, but after reading a bunch, I have come here to provide you with the truth. Here it is, references are all from the digital PDF version of the Raptor 700 Service manual, and are included so this is based on FACT, not speculation:
1) There is in fact a speed sensor. Section 8-1 the diagram shows the "speed sensor".
2) The speed sensor doesn't care what gear you are in. It's not a 5th gear speed sensor, it's an EVERY gear speed sensor. It's location on the back of the transmission, is hovering directly over the output shaft. The sensor operates like a magneto/reluctor ring system, which ocilates between .6v and 4.8v, and repeats that cycle TWICE for each FULL rotation of the rear wheels when in STOCK GEARING. See section 6-25 for details.
3) The speed sensor connects DIRECTLY to the ECU. It does not go anywhere else. This means that the ECU decides what to do with the information. If it's programmed to retard timing, or cut spark & fuel or whatever, we don't know, but the fact that the sensor is there, and has nothing to do with the ENGINE speed. See the wiring diagram at the end (after secion 9) and find the speed sensor is item number 27 in that diagram on the far right side.
4) Unplugging the speed sensor will NOT prevent the vehicle from starting OR moving, according to secion 6-5 but it WILL throw a code 42 (which is the meaning of life to any hitch hikers out there).
So there you have it. Unplugging it doesn't hurt anything, but will throw a code that the dealer will see if they plug in their diagnostic tool. It is able to govern your speed regardless of the gear you are in. Changing sprockets will effectively fool it into thinking you are going slower than you are, allowing a higher top speed. Unplugging it will also give you a higher top speed (assuming you have the power to get there).
My next step will be to figure out how to "look" at the eprom and see if there is a way to raise the allowed speed, or disable the speed governer all together.
Next question though: Can anybody tell me exactly what the dobeck or pcIII or other fuel controllers actually do? The reason I ask, is that a fuel controller might be able to bypass the limiter, if the fuel controller has the capabilty to override the computer's spark and fuel commands... which is why I suspect some people with aftermarket controllers are able to see such high speeds without unplugging the sensor.
hmmmmmm. eat me..
