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post #1 of (permalink) Old 09-25-2000, 01:19 PM Thread Starter
 
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Moved Ignition Module

When I changed out my ignition module on my 88YJ 4.2, I decided to move the module to a more convenient place. Looking around I found a neat place on the fire wall above the heater hose conections about 2.5" below the top of fire wall, I used three 1/4" self tapping screws. My only concern was heat, but where it was mounted orginally, was near the exhuast. Has anyone used this location and did it work ok for you?


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post #2 of (permalink) Old 09-25-2000, 06:10 PM
 
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Re: Moved Ignition Module

The module doesn't ground through the module case, so grounding isn't a concern, and the cooler the area it's mounted the better.
The back of the engine bay wouldn't be my first choice, but it should be protected there.

If you can, use washers or something to raise it up so air flow can get under it.
The more airflow the better. Some people that used to race the DuraSpark ignition used to cut a hole in the front panel, and mount the module on the inner fender right behind the hole so it got a fresh air supply.
Duct work isn't out of the question here...

If I were building from scratch, I'd put it in between the radiator and front grill.
That would insure a clean, fresh air supply, and be protected from damage.
High up on the inner fender would be my second choice, lifted so air could flow under it.

Good luck.

"I Have The Body Of A God... Buddha"
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post #3 of (permalink) Old 09-25-2000, 09:32 PM Thread Starter
 
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Re: Moved Ignition Module

Thanks TR I had some concern about the heat on the fire wall, so I guess I will need to find another location for the module. I had thought of placing an aluminum shield 2 or 3" in front of the module, it could be attached to the hood reinforcment, and would go up and down with the hood. Also I could stand the module off the fire wall about an inch, like you were saying, for air flow.

Happy Trails
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post #4 of (permalink) Old 09-26-2000, 09:16 AM
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Re: Moved Ignition Module

[img]/wwwthreads_images/icons/shocked.gif[/img] Don't use aluminum for heat shielding as it is the fourth best conductor of heat that there is.[img]/wwwthreads_images/icons/crazy.gif[/img]

CJDave
Quadra-Tracs modified While-U-Wait by the crack moonguy[img]/wwwthreads_images/icons/wink.gif[/img] Quadra-Trac Team.[img]/wwwthreads_images/icons/tongue.gif[/img][img]/wwwthreads_images/icons/smile.gif[/img]
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post #5 of (permalink) Old 09-26-2000, 12:35 PM
 
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Re: Moved Ignition Module

The single best thing you can do to cool things down is raise the module up off the fender, or where ever it's mounted, and put a sheet metal heat shield in between the module and any header tubes that might be facing it...
Allow air to circulate behind the module, and allow the edges of the module housing to work like heat sinks on both sides.

The second best thing is hood louvers or vents directing clean air too, or taking heat away from the module...

Heat rises, so expecting it to go out with the air flow past the transmission is a little short sighted...
The old time (and not so old time) circle track racers use scoops and flexible duct work to direct clean front end air to everything from brakes to electronics to the air filter.

It's always a good idea to have oil coolers (transmission, engine, power steering, differentials, ect.) in the clean air stream.
It's also a good idea to include things like the voltage regulator (if you have an external voltage regulator), the ignition module, ect. up there.

Moving the ignition module to the space between the radiator front and the front grill isn't out of the question either, it just takes a three extra feet of 6 wires, some solder, and some heat shrink tubing.

Some guys on real race cars in the old days moved everything between the radiator and the front grill.
(if you ever look at the space between the radiator and front grill on a late 50's through late 80's car, you will see why!)


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post #6 of (permalink) Old 09-26-2000, 04:43 PM Thread Starter
 
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Re: Moved Ignition Module

TR I like the idea of putting the module up front, that's it, I am making a bracket and moving it behind the grill and I will sure it does not block the air flow to the radiator. Thanks!

My Jeep is a work in progress, Happy Trails
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