A friend of mine is working on a cool build based on an old VW 1302 with some rather exotic solutions. He started out wth a GSXR engine, but has changed his mind and is now doing some pretty impressive "in-house engineering" to make the R32 engine+transmission fir the already heavily modified Beetle chassis.
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He'll be using one of my ECUs based on the Proteus firmware, and the purpose of this thread is to be able to discuss specific solutions and features that we'd like to implement in this project.
ECU build thread: https://rusefi.com/forum/viewtopic.php?f=2&t=1820&hilit=norway
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Some of the I/O and features we're planning on using so far:
OUT:
6x Spark
6x Fuel
1x Boost control
1x FP
1x (or 2x) VVT
1x Coolant fan
1x ETB
There'll probably be some more features and functions added along the way. One of the things that we'd like to have in time is some sort of CAN EGT input for individual cylinder fuel trimming and engine protection purposes. We've also discussed the possibility using an output for activating an air brake (Bugatti Veyron style). Mabe some brake pedal input+VSS logic could be implemented using the LUA script feature?
There'll probably be some more features and functions added along the way. One of the things that we'd like to have in time is some sort of CAN EGT input for individual cylinder fuel trimming and engine protection purposes.
Hopefully I read it right and you are planning to contribute some code into the firmware? That's exciting!
Hopefully I read it right and you are planning to contribute some code into the firmware? That's exciting!
Not yet, unfortunately - still have a lot of ways to go to get into ChibiOS and C++ for STM32...
But I'm working on a new board revision, and thought I'd make the Aux SPI available (pins PF6 ... PF9) as a header for future EGT connection through a stand-off board. Searching the forum, I see that some other users have implemented the MAX31855 for use wit MRE.
There are still a lot of free pins on the Proteus 0.5 F4 design, eg PF0 ... PF3 and PF10 ... PF15.
Could some of these be used for SPI-CS purposes?
Re: VW Beetle w. Mid-mount VR6 engine
Posted: Wed Feb 09, 2022 2:49 pm
by Simon@FutureProof
Regarding EGT I started doing some work with compatibility for ECUmasters EGT2CAN module.
I managed to get a lot of the key bits in place but stalled when it came to live debugging. The live debugging on the STM was a step of complexity I was just not expecting and I haven't had a chance to pick it up again.
Happy to turn over everything that was done for someone else to debug and complete if it sees a workable EGT input in a sensible time scale.
Edit to add - It was this unit, we chose it as they are really cheap and actually quite a good system. 8 channels for ~€140, K type thermocouples. We are set up to run it on the drift car and I have a unit on my desk, just didn't get to completion yet. https://www.ecumaster.com/products/egt-to-can/