LMM: digital dash for lmm
- Thread starter CRAWLEN
- Start date
Just noticed this lonely question.
I've swaped a few LMM's into other stuff like boats where BCM fed factory dash setup isn't an option. We typically use marine MFD from companies like Garmin to display engine gauges.
Biggest issue is HS GMLAN isn't an openly known CANbus protocol, so nobody makes a digital plun-N-play dash to work with it. Yes there is some OBDII based stuff out there, but you'll be spinning 4k with the tach reading 2400r due to network traffic delays associated with OBDII.
To convert raw HS GMLAN engine/trans data into something usable by off the shelf digital displays, I designed a little PCB gateway few years back that translates directly from HS GMLAN to whatever language the display speaks. This approach removes the gauge lag, and also allows data logging without disconnecting the main gauges. Opens up some cool stepper motor gauge options I really like using. See attached
Another option is Lingenfelter make a box that converts HS GMLAN data into voltage output lines, to drive old school analog gauges.
That's what's out there I know of so far.
I've swaped a few LMM's into other stuff like boats where BCM fed factory dash setup isn't an option. We typically use marine MFD from companies like Garmin to display engine gauges.
Biggest issue is HS GMLAN isn't an openly known CANbus protocol, so nobody makes a digital plun-N-play dash to work with it. Yes there is some OBDII based stuff out there, but you'll be spinning 4k with the tach reading 2400r due to network traffic delays associated with OBDII.
To convert raw HS GMLAN engine/trans data into something usable by off the shelf digital displays, I designed a little PCB gateway few years back that translates directly from HS GMLAN to whatever language the display speaks. This approach removes the gauge lag, and also allows data logging without disconnecting the main gauges. Opens up some cool stepper motor gauge options I really like using. See attached
Another option is Lingenfelter make a box that converts HS GMLAN data into voltage output lines, to drive old school analog gauges.
That's what's out there I know of so far.
Attachments
Plan was to originally use the lingenfelter module to convert to normal signals. But seen a nice digital dash I wanted but yeah due to being gmlan it's not going to work.
So was curious if anyone has made a gmlan dash but doesnt look it. This module you make, do you sell it ?
You can find more info on the gateways I build over at marinemods.us site. All depends on which dash your looking to use, if I can do ya any good or not. Currently I've focuses on J1939 and N2k output protocols since that's the two most common in marine.
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That unit should work outa the box. However the first line states the problem I listed above, it's OBDII based. Which will incur some lag.
I've actually installed one of those before in a Subaru powered kit car for a customer few years back. Only issue I see with the LMM on that is boost will read wrong. OBD pids read SAE.MAP which is way off from actual MAP2 that GM uses. If it has a way to assign custom pids, you can overcome that issue and rest should be fine.
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I've actually installed one of those before in a Subaru powered kit car for a customer few years back. Only issue I see with the LMM on that is boost will read wrong. OBD pids read SAE.MAP which is way off from actual MAP2 that GM uses. If it has a way to assign custom pids, you can overcome that issue and rest should be fine.
Sent from my SAMSUNG-SM-G890A using Tapatalk