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How-to: building a GPS-based PSE valve controller for passing track sound checks

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How-to: building a GPS-based PSE valve controller for passing track sound checks

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Old 05-29-2015, 11:41 PM
  #31  
hfm
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Excellent! Now, don't get caught.

Dan (thinks this was sheer genius, rebellious and potentially problematic down the road, all rolled in one)
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Old 05-30-2015, 03:51 AM
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So super smart! It would be neat if you could set this up to quiet the exhaust when getting close to home. I'm sure there are other applications. Awesome!
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Old 05-30-2015, 12:56 PM
  #33  
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Finally! A smarter, cooler, hipper Mikymu!!! Brilliant, thank you.
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Old 05-30-2015, 10:09 PM
  #34  
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Originally Posted by Mech33 View Post
Now on to the specifics of how to make your own! First, you’ll need all of the following parts:

1) Male / female connector pair for inserting between the OEM PSE solenoid and the OEM wiring harness, $8.99
http://www.bmotorsports.com/shop/pro...oducts_id/1406


2) Main processor board (Arduino UNO R3), $26.95
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


3) Relay board (Seeed Relay Shield v2.0), $20.99
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


4) GPS board (Adafruit Ultimate GPS Logger), $53.99
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


5) Car 12V adapter with plug compatible with processor board, $5.99
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


6) Case for the board (I only use it for protecting the bottom half of the board since the top doesn't fit with the multi-board stack... I've yet to find a better off-the-shelf case yet), $9.99
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


7) Waterproof connectors for inserting between the board stack and the other wiring (I'm using one of these in the engine bay so I can plug jumper wires in easily to go back to stock mode vs. Laguna mode when I want to just temporarily hook up or remove the GPS system, and another near the board), $6.48
Amazon.com: 10 Kit 2 Pin Way Waterproof Electrical Wire Connector Plug: Electronics


8) 2-conductor bonded wire (I run this from the engine bay to the controller board with a waterproof connector on each end), $6.99
Autumn Leave 10M 20awg Extension Cable Wire Cord for Led Strips Single Colour 3528 5050 - - Amazon.com


9) USB cable for programming the main processor board (only needed if you don't already have one), $4.67
Amazon.com: AmazonBasics USB 2.0 Cable - A-Male to B-Male - 6 Feet (1.8 Meters): Electronics


10) A soldering iron, wire stripper, crimper, etc. for building the custom wiring harness.

11) A computer (Windows or Mac) for installing the Arduino development software and programming the board. You’ll need the following code file that I created based on some starter code for the GPS module and then adding the geofence functionality: https://dl.dropboxusercontent.com/u/...nce_v4.ino.zip More on how to use this file later…
Forgive the dumb question by this Luddite, but is there a reason the system can't be integrated to piggyback onto the existing GPS unit in the PCM?
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Old 05-30-2015, 10:15 PM
  #35  
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Originally Posted by ipse dixit View Post
Forgive the dumb question by this Luddite, but is there a reason the system can't be integrated to piggyback onto the existing GPS unit in the PCM?
It absolutely could, if Porsche wanted to. Unfortunately there is no mechanism I have seen for the PCM to output the car's GPS position (is it in the OBD stream somewhere maybe?) such that it could be read by an external device.

Honestly Porsche could just implement the entire system with just software changes. The valve control is already in the ECM, and so is the GPS data. But that's not happening...
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Old 05-30-2015, 10:20 PM
  #36  
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Originally Posted by Mech33 View Post
It absolutely could, if Porsche wanted to. Unfortunately there is no mechanism I have seen for the PCM to output the car's GPS position (is it in the OBD stream somewhere maybe?) such that it could be read by an external device.

Honestly Porsche could just implement the entire system with just software changes. The valve control is already in the ECM, and so is the GPS data. But that's not happening...
I believe you can tap into the car's GPS location via the XM receiver unit.

But probably too much effort and work given your workaround.
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Old 05-31-2015, 10:14 PM
  #37  
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Well... here I go! I'm not an expert solder... but got the job done! I will update my progress as I get more parts!

Last edited by doborder; 06-09-2015 at 08:46 PM.
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Old 05-31-2015, 10:58 PM
  #38  
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Originally Posted by doborder View Post
Well... here I go! I'm not an expert solder... but got the job done! I will update my progress as I get more parts!
Nice work!

By the way, the crimping of the connector pins will probably be the biggest challenge if you don't have a proper crimp tool. I would recommend investing in one of these if you want to make your life easy (otherwise you'll have to very carefully try and do it with needle nose pliers):

Amazon.com: GM Delphi Weatherpack Crimper Tool: Automotive Amazon.com: GM Delphi Weatherpack Crimper Tool: Automotive

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Old 05-31-2015, 11:07 PM
  #39  
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Question Mech33: My local track limits sound at 85 Bd. What is the 991 GT3 creati8ng stock?
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Old 05-31-2015, 11:14 PM
  #40  
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Ok so I went back and re-read the discussion. My apology for the question.

So this all started when I went looking for a solution to passing 90-92 dB sound days at Laguna Seca without major modifications. For my first Laguna day with the new GT3, I just mechanically held the PSE valves in the “closed” position for an entire 92 dB track day at Laguna Seca and consistently passed sound at ~92.5 dB.
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Old 05-31-2015, 11:17 PM
  #41  
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Originally Posted by dntlvet View Post
Question Mech33: My local track limits sound at 85 Bd. What is the 991 GT3 creati8ng stock?
Hi, I'm not aware of a measurement distance standard for sound at tracks, so every track sound station may read differently for the same car and have different limits accordingly.

In other words, the distance from the track and method in which it is measured can affect the results, so getting a comparable baseline read from your local track would be helpful to compare.

Forcing the stock valves shut gets you about -10 dB. Turn-always can net another -3 dB.
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Old 06-01-2015, 02:14 AM
  #42  
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Originally Posted by Mech33 View Post
Nice work!

By the way, the crimping of the connector pins will probably be the biggest challenge if you don't have a proper crimp tool. I would recommend investing in one of these if you want to make your life easy (otherwise you'll have to very carefully try and do it with needle nose pliers):

Amazon.com: GM Delphi Weatherpack Crimper Tool: Automotive

Will look into it! I do actually have a crimper... I could always use another
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Old 06-01-2015, 03:14 AM
  #43  
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Originally Posted by doborder View Post
Will look into it! I do actually have a crimper... I could always use another
I'm always looking for good excuses to buy new tools.
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Old 06-04-2015, 03:39 AM
  #44  
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getting closer.. Harness done... just waiting for the rest of the boards to show up

Last edited by doborder; 06-09-2015 at 08:46 PM.
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Old 06-04-2015, 04:00 AM
  #45  
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Originally Posted by doborder View Post
getting closer.. Harness done... just waiting for the rest of the boards to show up
Looking good. By the way, installing on your Cayman is uncharted territory... I haven't seen the PSE valve solenoid configuration or wiring on the Cayman to confirm it is the same as the GT3. So please check that the pinout and operation looks similar!
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