MSD80/81 CANbus Boost

[samuria]

Has anyone successfully decoded boost pressure from OBD canbus? I have tried reverse engineering a few apps that log boost pressure, but the later versions of the apps have some level of obfuscation.

I have not tried tapping into PT-CAN yet, just waiting for an Arduino shield to arrive before splicing a canbus wire. But getting boost from OBD should be possible as these dongle are able to do it somehow - albeit may be a little slower.

I have already checked out the loopybunny website, as well as a few canbus projects related to the E9X platform.

Thanks

 

[AzNdevil]

good question, i havent found anything when i first looked at it, this would be helpful feeding into racechrono
actually i am working on something like this recently

 

[carabuser]

It's not broadcast from the DME. If you wanted to read boost then you would have to set up a request over KWP to the DME (you can access it by requesting the common identifier). That is how COBB/MHD handles it for their logging, but rather than common identifier they specify the exact RAM address because they are bulk reading many parameters at once.

 

[AzNdevil]

It's not broadcast from the DME. If you wanted to read boost then you would have to set up a request over KWP to the DME (you can access it by requesting the common identifier). That is how COBB/MHD handles it for their logging, but rather than common identifier they specify the exact RAM address because they are bulk reading many parameters at once.

thats what i was afriad of... i want to keep it simple and stupid

thanks anyways though, saves me a lot of time trying to figure it out

 

[Jake@MHD]

If there is a large enough demand for it, we could add an additional 100ms broadcast of 4/6/8 parameters (depending on resolution needed) for dash displays, configurable from a preset list of possible ram vars.

 

[AzNdevil]

If there is a large enough demand for it, we could add an additional 100ms broadcast of 4/6/8 parameters (depending on resolution needed) for dash displays, configurable from a preset list of possible ram vars.

thanks for your reply!
however.... i doubt that many people care since this is only useful for data loggers and as these cars cant survive a 30 min track session without extensive cooling mods, not many people track them in the first place

besides, most that care about track driving/performance have moved on to other newer platforms... less hassle and certainly less work