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post #1 of (permalink) Old 03-05-2004, 08:20 AM
BogDogJim
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jeep project update

I got my ECU waterproof box built, pre wired with termanal strips. The strips are numbered and in numerical order for ease of termanating wire. I re-wired the complete Throttle body injection system (including the ignition, alternator, gauges and other critical systems) with #14 blue stranded wire. After connecting everything and making sure it ran good, I built the box pictured below. Every wire going to the ECU termanial box is numbered on both sides of the wire (or color coded in the cases where the wires don't tie directly to the ECU, i.e. power-red, run power-yellow, gound-black {and so on}). Zip ties are used as a wire management system within the ECU termanial box. Approx 40 wires will enter the box which will be mounted on the firewall inside the <nobr><nobr><a class="iAs" style="border-bottom:darkgreen 1px solid;text-decoration:underline;color:darkgreen;background-color:transparent;" href="#" onclick="return kwC();" target="_blank" oncontextmenu="return false;" onmouseover="kwE(event,217964);" onmouseout="kwL(event);" onmousemove="kwM(217964);"><nobr><a class="iAs" style="border-bottom:darkgreen 1px solid;text-decoration:underline;color:darkgreen;background-color:transparent;" href="#" onclick="return kwC();" target="_blank" oncontextmenu="return false;" onmouseover="kwE(event,217964);" onmouseout="kwL(event);" onmousemove="kwM(217964);">engine</nobr></a></nobr></a></nobr> compartment. The wires will enter through the side of the box (the box will be mounted vertical, so they will really enter throught the bottom) and then sealed in place. If the seal on the wires doesn't hold, the laws of physics should help because the air will be trapped in the box, even if completly submerged. more pics to follow when I get the final installation done.


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File Type: jpg 1272574-ECU box 1.JPG (67.4 KB, 3 views)
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post #2 of (permalink) Old 03-05-2004, 08:50 AM
BogDogJim
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Re: jeep project update

another pic
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File Type: jpg 1272598-ECU box 2.JPG (65.8 KB, 37 views)
post #3 of (permalink) Old 03-05-2004, 09:38 AM
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Re: jeep project update

I have a memory of my old ECU on my 88YJ getting hot...doesn't sound like you are making any plans for venting...might be something to think about.
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post #4 of (permalink) Old 03-05-2004, 09:53 AM
BogDogJim
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Re: jeep project update

I have potting compound that is supposed to help dissipate heat on the circuit board and make it waterproof. I WILL keep a close eye on it, thanks for the heads up.
post #5 of (permalink) Old 03-05-2004, 10:33 AM
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Re: jeep project update

Jim,

Great work! I thought of the same thing, however as a venting system, use a small sealed tube on 2 sides of the ECU box connected to 2 places on a snorkel, as long as the snorkel has a filter on top. I am not sure if there would be mass air flow though these tubes and accross the ECU, or a little, since both tubes would be under suction. Do keep a close eye on the heat factor as it will completely fry the ECU.

Just my $.02
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