Its got the equivalent of 4 ignition modules in there, plus 8 injector drivers and a stepper driver. It puts out some heat
ECU protection
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Its got the equivalent of 4 ignition modules in there, plus 8 injector drivers and a stepper driver. It puts out some heat
The connectors are not watertight.
And in my life in oceanography very few things sealed with silicone managed to keep water out.
If silicone can keep oil in your sump, with careful application, it can keep water out of a box. Apply around the connectors too. If you're worried, spray the inside case (not PCB) too. It'll last even longer undisturbed in there. Never had any water ingress issues in the units I sealed, although honestly the spray would have probably been enough.
I thought we determined that caused overheating?
Apparently these things are more sensitive to temperature variations than my wife!!!
As noted, just cool the thing if it's an issue. They're already close to the limit, and a little bit of conduction can make all the difference.
You can buy extruded heat sinks and even heat pipes fairly easily. I wouldn't go out of my way for no good reason, but if you want to seal it and it gets toasty, you're going to have to cool it at least passively.
Cheers,
Kennith
Sealing the ECU itself wont make any difference to heat dissipation. Sealing a box around it, cutting off heat exchange, would. I also doubt any coating would make much difference.
ptschram
Well-known member
The case has a breather.
If there was enough demand, I could make up harnesses, but they'd not be cheap.
FWIW-my first Schram-Spec YouTube video is on the topic of rejuevanting GEMS ECUs. I just repaired one that was so bad, the case was compeletely eaten away.
I'm not too concerned about the heat generated as the power transistors are attached to the case with thermal transfer material to dissipate the heat and they seem to fare just fine in more warm climates.
When Jason Michaels and I built his truck for the AOBC we coated his ECU with a conformal coating-name of which I can't recall.
BUT, the ECU I just brought back to life had the factory conformal coating all boogered up-apparently after 20 years, it isn't as conformal as it started out.
he has saved 3 for me so far. the shit they spray on the roads up here eats the case.