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Terry @ BMS Terry @ BMS is offline
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Join Date: Jan 2008
Default 04-03-2017, 04:31 PM

Can't remembr if I posted this info here. Just in case I didn't.

I've found there tends to be some confusion around the DWP setting with JB4 single turbo firmware. With the twin turbo firmware, this setting determines the wastegate position during off and very low boost, with 0 = 0% PWM/dutycycle and 100 = 100% PWM/dutycycle. The default setting here is 60.

Once you change to single turbo firmware, this value is adjusted to reflect the PWM/dutycycle spool mode. e.g. PWM/dutycycle is held at 100% (max) until boost is within a percentage of its target. A value of 60 means PWM is held at 100% until boost is at 60% of its target, 80 means PWM is held at 100% until boost is at 80% of its target, etc.

Higher values will improve spool behavior but also contribute to initial overshoot. In many instances that initial overshoot is desirable. But in others it is not. So set your DWP accordingly. It can also be changed on the fly in dash via menu10 should you want to play around with different settings on the track. In dash 0-5000rpm = 0-100.

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