Tuning Wastegate Rattle with AccessTuner Race?

ferocity02 · 03-17-2015, 12:12 PM

As we all know the JB4 has a couple menus that can help minimize the wastegate rattle. Can any of the calibrations available in "AccessTuner Race" be used to accomplish the same thing?

In looking through the user guide, one calibration that looks promising is the WGDC (Base) table. I'm curious if this table can be adjusted to minimize the wastegate rattle?

During normal cruising, deceleration, and light acceleration my WGDC stays within 13-16%.

Mine rattles when decelerating and during light acceleration, otherwise they are fine. I installed DP's last weekend and they really exacerbate the rattling, whereas the stock DPs help mask the rattle quite a bit. My turbos are fine, they were replaced by the dealer last year and only have about 6k miles on them. They rattled just as much as the 80k mile turbos that were removed.

spxxx · 03-17-2015, 04:59 PM

I think there's another table for wgdc off throttle, it allows you to force the wgs closed at low load/RPM occasions. That's usually when people hear rattle is decelerating off throttle

ferocity02 · 03-18-2015, 12:26 AM

Quote:

Originally Posted by spxxx

I think there's another table for wgdc off throttle, it allows you to force the wgs closed at low load/RPM occasions. That's usually when people hear rattle is decelerating off throttle

Would this be the WGDC (Pre-control A) table?

I'm looking through my tune in ATR trying to figure out which ones match the WDGC I'm actually seeing during deceleration. None of them match. I'm guessing there are some multipliers that I'm not accounting for.

spxxx · 03-20-2015, 08:18 PM

Quote:

Originally Posted by ferocity02

Quote:

Originally Posted by spxxx

I think there's another table for wgdc off throttle, it allows you to force the wgs closed at low load/RPM occasions. That's usually when people hear rattle is decelerating off throttle

Would this be the WGDC (Pre-control A) table?

I'm looking through my tune in ATR trying to figure out which ones match the WDGC I'm actually seeing during deceleration. None of them match. I'm guessing there are some multipliers that I'm not accounting for.

Yep... pre-control

fmonteiro444 · 03-21-2015, 11:23 AM

Quote:

Originally Posted by ferocity02

Would this be the WGDC (Pre-control A) table?

I'm looking through my tune in ATR trying to figure out which ones match the WDGC I'm actually seeing during deceleration. None of them match. I'm guessing there are some multipliers that I'm not accounting for.

Let me know if you can come up with any solutions.

03-17-2015, 12:12 PM	#1
ferocity02 Colonel 553 Rep 2,085 Posts Drives: 2013 135is Join Date: May 2014 Location: USA iTrader: (8)	Tuning Wastegate Rattle with AccessTuner Race? As we all know the JB4 has a couple menus that can help minimize the wastegate rattle. Can any of the calibrations available in "AccessTuner Race" be used to accomplish the same thing? In looking through the user guide, one calibration that looks promising is the WGDC (Base) table. I'm curious if this table can be adjusted to minimize the wastegate rattle? During normal cruising, deceleration, and light acceleration my WGDC stays within 13-16%. Mine rattles when decelerating and during light acceleration, otherwise they are fine. I installed DP's last weekend and they really exacerbate the rattling, whereas the stock DPs help mask the rattle quite a bit. My turbos are fine, they were replaced by the dealer last year and only have about 6k miles on them. They rattled just as much as the 80k mile turbos that were removed. __________________ 2013 135is DCT Carbon Black Metallic
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03-17-2015, 04:59 PM	#2
spxxx Boost 1376 Rep 3,704 Posts Drives: 135i M-Sport Join Date: Feb 2014 Location: Valley of Silicon, CA - United States iTrader: (9)	I think there's another table for wgdc off throttle, it allows you to force the wgs closed at low load/RPM occasions. That's usually when people hear rattle is decelerating off throttle
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