baccaruda Posted August 16, 2006 Share Posted August 16, 2006 I am nearing completion of my EJ22 swap. I am considering mounting the ECU under the hood, for simplicity's sake. This will also leave the car closer to stock in case it ever needs an EA82 again as well as make it easier to pull codes. I am interested in what others have done to waterproof their ECUs when located under the hood. So far I've found GSI's waterproof Lexan boxes (bottom of the page; #73510 Large just needs a couple of holes drilled and RTV'ed by the looks of it) and even though they're here in SpoVegas, and even though it seems about perfect, you all know me well enough to know that I'm going to ask for other ideas anyway. Whatcha got? Link to comment Share on other sites More sharing options...
Turbone Posted August 16, 2006 Share Posted August 16, 2006 Coffee can. Fill with epoxy:cool: Make a hole in the side so you can see the light. Link to comment Share on other sites More sharing options...
nipper Posted August 16, 2006 Share Posted August 16, 2006 if you truly want to waterproof it, and are feeling brave, move it into the car. Will require alot of soldering. The other choice is a water proof box. People who use sooby engines in conversions do both. nipper Link to comment Share on other sites More sharing options...
baccaruda Posted August 16, 2006 Author Share Posted August 16, 2006 I don't mind soldering but I'm not yanking all of the old wiring, and I don't want to drill new holes in the firewall. Link to comment Share on other sites More sharing options...
PoorManzImpreza Posted August 16, 2006 Share Posted August 16, 2006 Just keep in mind there are chips in the ECU that get hot, so completely sealing the ecu off for an ECU that isn't sealed from the factory isn't a good idea.. Link to comment Share on other sites More sharing options...
robm Posted August 16, 2006 Share Posted August 16, 2006 It may already be quite waterproof. ECU's are often epoxy potted from the factory. Have a look inside to see it it is. If it isn't, DON"T JUST POUR IN THE EPOXY! Use a box. Heat build-up will kill it. In fact, just putting it in a new enclosure could give you heat problems, so be aware of this when you do it. Link to comment Share on other sites More sharing options...
WheaT_BeeR_MaN Posted August 16, 2006 Share Posted August 16, 2006 how about cutting out some fire wall and putting a box on the outside. a box u made or bought.kinda like an extension? i dunno just thinkin :-\ Link to comment Share on other sites More sharing options...
Carmen Posted August 17, 2006 Share Posted August 17, 2006 my dad did that about one year ago in a volkswaon, it was diesel and the owner ask dad to swap its burnt diesel engine for an efi gasoline, same brand. the problem with in the hood ecu is that the heat of the engine, and the hood when parking in sunny days, get it too hot and it damaged two times. now dad is working in put it inside the car, in the glovebox, this is the 3 ecu module it puts on thge car. i think that is bad idea. tri to install it inside, is better idea Link to comment Share on other sites More sharing options...
Buddy Posted August 17, 2006 Share Posted August 17, 2006 my dad did that about one year ago in a volkswaon, it was diesel and the owner ask dad to swap its burnt diesel engine for an efi gasoline, same brand. the problem with in the hood ecu is that the heat of the engine, and the hood when parking in sunny days, get it too hot and it damaged two times. now dad is working in put it inside the car, in the glovebox, this is the 3 ecu module it puts on thge car. i think that is bad idea. tri to install it inside, is better idea hey welcome back Carmen!!! Link to comment Share on other sites More sharing options...
Carmen Posted August 17, 2006 Share Posted August 17, 2006 Link to comment Share on other sites More sharing options...
Buddy Posted August 17, 2006 Share Posted August 17, 2006 you're welcome!!! Later!!! Link to comment Share on other sites More sharing options...
Carmen Posted August 17, 2006 Share Posted August 17, 2006 thank you. i was doing school "things" that dont left me any spare time.. Link to comment Share on other sites More sharing options...
baccaruda Posted August 17, 2006 Author Share Posted August 17, 2006 Allright, you guys win *grumble* I'll put it under the dash where it belongs. Link to comment Share on other sites More sharing options...
WheaT_BeeR_MaN Posted August 17, 2006 Share Posted August 17, 2006 no way. u didnt like my idea? it would be in the car but on the fire wall and the wire built around it? ooor maybe another idea is in the wiper cowl with some moding to it. Link to comment Share on other sites More sharing options...
bgd73 Posted August 17, 2006 Share Posted August 17, 2006 Just keep in mind there are chips in the ECU that get hot, so completely sealing the ecu off for an ECU that isn't sealed from the factory isn't a good idea.. case it in aluminum sheet with silicone inbetween thin layer -- I bet it stays cooler than in the car Link to comment Share on other sites More sharing options...
nipper Posted August 17, 2006 Share Posted August 17, 2006 There is a reason they are mounted IN the car. MFG would love to have them under the hood and free up dash room if they could, but they cant. Inside the car is dry, weatherproof, and has a fairly easy to manage temperiture range, where as under the hood you have none of that. Also the unit is near high voltage where emf can affect it. nipper Link to comment Share on other sites More sharing options...
baccaruda Posted August 17, 2006 Author Share Posted August 17, 2006 Yeah, I agree about the heat as the main factor. I took a look at everything last night and it looks like the worst part will be securely mounting the ECU to the steering column, as the mounts are different. Link to comment Share on other sites More sharing options...
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