Olsen skrev:
Henrik:
Ka det passe at der er flyback upgrade i den megasquirte 2 i sælger, for der er sådan en jeg har, hvad skal ændres i megatune216 for at ku køre med lav ohmsdyser? hvis der skal ændres noget.
Ja, den har flyback upgraden.
Try 30% and 1.0ms to start, then "tune" them as described in the manual
Se her:
Start with:
PWM Time Threshold = 1.0 millisecond, and
PWM Current Limit (%) = 75% (30% if you have the flyback board installed).
Once you get your engine idling, then first adjust the PWM duty cycle down in 1% increments until you notice a change in idle quality (be sure to hit the "send to ECU" button each time you change the value). This is the point where the current limit is too much and the injectors are not being held fully open.
Then move the value back up 3 - 5% (for example, if the idle falters at 45%, then put in a number of 48% to 50%).
Move on to adjusting the time threshold. Lower the time threshold by 0.1 milliseconds at a time until the idle quality deteriorates.
Then increase it 0.3 ms.
Now, repeat these steps (starting at #2). Adjust the duty cycle and time threshold alternately to get the optimum values for your set-up. You will converge on a set of numbers that work well for your set-up.
On the car, setting the PWM parameters is very easy to do and only takes a few minutes. At idle the overall injector pulse widths are small compared to their close time, so this will allow you to adjust the values. In other words, adjust the PWM current limit before taking the car out on the street where injector pulse widths become high, increasing the possibility of overheating your injectors.
You may find that you can idle at a very low PWM%, but the engine will stumble or cough if given any throttle. This can be due to a too low PWM% especially if your injectors are large and the idle pulse width is approximately equal to the PWM Time Threshold. In that case you may be idling almost entirely on the PWM Time Threshold. So rev the engine occasionally as you are tuning the PWM parameters, to ensure that you haven't gone too low.
Also, for some setups, an initial PWM Current Limit of 75% may be too low, so they will need to increase this value - same for the time threshold. Use PWM time threshold values greater than about 1.5 to 1.7 milliseconds only with great caution – it is possible to burn out your injectors!
Snippet direkte ud af manualen....
PWM time threshold er som regel fint med 1.0mS
PWM Current limit skal som regel være 30%.
Lad være med øge/mindske med ret meget af gangen, og følg den procedure der er i manualen, så klapper det som fod i handske.
_________________
Henrik
http://boost-it.dk
Citat:My experience tells me that once the cam with the lumpy idle is selected, the thinking mostly stops. Decisions then are based on lowest price, looks, ease of installation, coolness factor, the 'latest thing' syndrome, peer pressure, old wives tales, and bad advice.
Citat slut.
Hold kæft hvor er det sandt!
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