Cdnspeed
Well-Known Member
- Thread starter
- #1
Hey guys,
for the last little while i was super determined to install an active gt350 exhaust on my GT PP1.
the wiring diagrams make it seem simple 3 wires 2 to power and 1 to the ECU.... Not so much.
I did have Roush axle backs but was so over the highway drone so I figured i'd sell them and get an OEM Gt350 and make it work.
The First thing I did was crack the motors open to figure out what was inside, it's basically a microcontroller communicating on a LIN network similar to can bus but only 1 wire. There was no way i was going to crack this code. I also wasn't about to pay $300 for a wireless on off remote that the volkswagen guys have (which is compatible with the stock valves)
So I made the valves dumb valves. Gutted the boards and soldered wires directly from the motor to the pins. I opened them up with a sharp exacto knife, it takes a while but it will work and give you the cleanest job, I used some super glue to hold the halves back together. Then used some high temp silicone sealant. I'm not too worried about moisture since it is just a simple DC motor in there now
Sourced out some new connectors from digikey
https://www.digikey.ca/product-detail/en/molex/0349003120/WM20002-ND/5700301
Cheap enough $1.24CDN a piece.
Next step make a prototype controller.
Parts list:
Arduino Nano - https://www.banggood.com/Geekcreit-...d-p-940937.html?rmmds=search&cur_warehouse=CN
L298N H bridge( Likely over kill) - https://www.banggood.com/Wholesale-...rd-p-42826.html?rmmds=search&cur_warehouse=CN
315MHZ M4 receiver - https://www.adafruit.com/product/1096
Single button Fob - https://www.adafruit.com/product/1392
LM7805 5V Linear regulator
MX150 Female 8 position connector - Digikey
MX150 Male panel mount 8 position connector - digikey
and a generic bread board to put them together.
Added a wee bit of code using a program called XOD the valves are opened with a 40% duty cycle and 1 second to open, a 40% duty cycle prevents the valves from snapping open and closed potentially damaging the spring that attaches to the valve. website - https://xod.io/
and used some double sided tape to stick the fob to the dash.
Now that I know all these components work together and the code works I have designed a PCB that will let me mount everything into a smaller frame and even smaller box. new PCB will allow Throttle to open it during Wot and possibly add a 2 button remote to have a 50% open version but i don't think it will be consistent due to no position tracking
I don't have a final picture of the enclosure the board is mounted in as it wouldn't do the project justice.
The harness is really straight forward One connector into the Box, 2 connectors for the valves, an eyelet for ground and one fuse tap.
Next phase for this project will be to add a connector on the Throttle pedal to open the valves at WOT.
the button has 2 functions currently press quickly will cycle the valves open or closed. holding the button will allow you to find "home" when you put them on for the first time.
Also every time the car powers up the valves close, which is nice for those 5am starts going to work.
the controller box only needs one power wire and one ground, currently i have a fuse tap in the position 23 in the interior fuse box
in the end the hardware ended up costing about $40ish dollars and 2 hours of coding. Don't know how reliable the hacked together setup will be but the Version 2.0 with the custom PCB should be dead reliable.
I may sell a couple of the finished PCB's if there is interest, it would work on basically any car, you would need to gut the motors or send them to me to get it done.
for the last little while i was super determined to install an active gt350 exhaust on my GT PP1.
the wiring diagrams make it seem simple 3 wires 2 to power and 1 to the ECU.... Not so much.
I did have Roush axle backs but was so over the highway drone so I figured i'd sell them and get an OEM Gt350 and make it work.
The First thing I did was crack the motors open to figure out what was inside, it's basically a microcontroller communicating on a LIN network similar to can bus but only 1 wire. There was no way i was going to crack this code. I also wasn't about to pay $300 for a wireless on off remote that the volkswagen guys have (which is compatible with the stock valves)
So I made the valves dumb valves. Gutted the boards and soldered wires directly from the motor to the pins. I opened them up with a sharp exacto knife, it takes a while but it will work and give you the cleanest job, I used some super glue to hold the halves back together. Then used some high temp silicone sealant. I'm not too worried about moisture since it is just a simple DC motor in there now
Sourced out some new connectors from digikey
https://www.digikey.ca/product-detail/en/molex/0349003120/WM20002-ND/5700301
Cheap enough $1.24CDN a piece.
Next step make a prototype controller.
Parts list:
Arduino Nano - https://www.banggood.com/Geekcreit-...d-p-940937.html?rmmds=search&cur_warehouse=CN
L298N H bridge( Likely over kill) - https://www.banggood.com/Wholesale-...rd-p-42826.html?rmmds=search&cur_warehouse=CN
315MHZ M4 receiver - https://www.adafruit.com/product/1096
Single button Fob - https://www.adafruit.com/product/1392
LM7805 5V Linear regulator
MX150 Female 8 position connector - Digikey
MX150 Male panel mount 8 position connector - digikey
and a generic bread board to put them together.
Added a wee bit of code using a program called XOD the valves are opened with a 40% duty cycle and 1 second to open, a 40% duty cycle prevents the valves from snapping open and closed potentially damaging the spring that attaches to the valve. website - https://xod.io/
and used some double sided tape to stick the fob to the dash.
Now that I know all these components work together and the code works I have designed a PCB that will let me mount everything into a smaller frame and even smaller box. new PCB will allow Throttle to open it during Wot and possibly add a 2 button remote to have a 50% open version but i don't think it will be consistent due to no position tracking
I don't have a final picture of the enclosure the board is mounted in as it wouldn't do the project justice.
The harness is really straight forward One connector into the Box, 2 connectors for the valves, an eyelet for ground and one fuse tap.
Next phase for this project will be to add a connector on the Throttle pedal to open the valves at WOT.
the button has 2 functions currently press quickly will cycle the valves open or closed. holding the button will allow you to find "home" when you put them on for the first time.
Also every time the car powers up the valves close, which is nice for those 5am starts going to work.
the controller box only needs one power wire and one ground, currently i have a fuse tap in the position 23 in the interior fuse box
in the end the hardware ended up costing about $40ish dollars and 2 hours of coding. Don't know how reliable the hacked together setup will be but the Version 2.0 with the custom PCB should be dead reliable.
I may sell a couple of the finished PCB's if there is interest, it would work on basically any car, you would need to gut the motors or send them to me to get it done.
Sponsored
Last edited:
