Big bunch of wires thru firewall......I need a rubber!!! - Team Camaro Tech
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post #1 of 10 (permalink) Old Oct 3rd, 07, 05:58 PM Thread Starter
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Question Big bunch of wires thru firewall......I need a rubber!!!

Now that I have your attention, I have an arse load of wires that need to be run thru the firewall.....I'm talking about 50 or 60 of them. They are wrapped in the wire sheathing that GM uses to wrap up their wires with.....it's about 1-1/2" or so big around. I need somthing that I can insulate the wires from rubbing on the metal and causing a short.

I was thinking of one of those grommets that you put a marker light in on a trailer??? I havent really looked at one yet, but I have a hunch that it might work. I was simply wondering if anyone makes somthing that is designed specifically for this application.

Thanks for any thoughts,

Joe

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post #2 of 10 (permalink) Old Oct 3rd, 07, 06:34 PM
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Re: Big bunch of wires thru firewall......I need a rubber!!!

Check out Steele Rubber Products. They've got just about every kind of rubber do-hicky you can imagine. Not sure if they have a web site or not - might google them. But they will send you a catalog.

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post #3 of 10 (permalink) Old Oct 3rd, 07, 06:39 PM
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Re: Big bunch of wires thru firewall......I need a rubber!!!

Check a Tru-Value hdwe store moreso than a Home Depot or Lowes's.

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post #4 of 10 (permalink) Old Oct 3rd, 07, 06:54 PM
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Re: Big bunch of wires thru firewall......I need a rubber!!!

Can't help on a grommet, but I'd want to bulk head mine... I like the picture on the bottom in this link...
http://www.wiresandpliers.com/harnesses.html

Steve
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post #5 of 10 (permalink) Old Oct 3rd, 07, 07:25 PM
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Re: Big bunch of wires thru firewall......I need a rubber!!!

You can use a piece of the corregated plastic wire sheathing used on the newer vehicles. Just cut a piece the circumference of the hole and tuck it around the metal edge, works great.

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post #6 of 10 (permalink) Old Oct 3rd, 07, 07:54 PM
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Re: Big bunch of wires thru firewall......I need a rubber!!!

Quote:
Originally Posted by eville View Post
Can't help on a grommet, but I'd want to bulk head mine... I like the picture on the bottom in this link...
http://www.wiresandpliers.com/harnesses.html
I like that.





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post #7 of 10 (permalink) Old Oct 3rd, 07, 08:44 PM Thread Starter
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Re: Big bunch of wires thru firewall......I need a rubber!!!

Quote:
Originally Posted by eville View Post
Can't help on a grommet, but I'd want to bulk head mine... I like the picture on the bottom in this link...
http://www.wiresandpliers.com/harnesses.html
Nice.....I like it as well, but even if I could find one, it would be quite expensive and super time consuming to put together. After searching for around 40 minutes or so, I found this.........

http://www.racerpartswholesale.com/sealsit1.htm

I think this is what I'm looking for. I think a 1.8 or 1.5 will be the one for me. Summit and Jegs both carry these along with lots of other big name retailers.

Thanks abucnh guys!!!

Joe

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post #8 of 10 (permalink) Old Oct 3rd, 07, 09:55 PM
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Re: Big bunch of wires thru firewall......I need a rubber!!!

oh, i was thinking i would measure where the connector needed to go and send the harness to them. I'm not going to be responsible for that many connections!
JimM can vouch for my wiring capabilities!

Steve
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post #9 of 10 (permalink) Old Oct 4th, 07, 04:35 AM
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Re: Big bunch of wires thru firewall......I need a rubber!!!

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Originally Posted by JimM View Post
I like that.
You can buy commerical connectors, just like military circular connectors, through Newark Electronics, along with backshells for strain relief.

Only problem is the crimpers for the pins are $200 and up, Daniels Manufacturing. and the extractors for the same pins are $. However, it is tedious, but you can solder the wires into the contact socket.

It all can be a little pricey, but a very nice set-up/layout when done.

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post #10 of 10 (permalink) Old Oct 4th, 07, 06:08 AM
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Re: Big bunch of wires thru firewall......I need a rubber!!!

I think a rubber is the right choice. Why introduce 3 connections into a wire if you don't need to?

We have been using those connectors forever. In our ignorance we call them Cannon Plugs. Up at Cat one time the instructor was calling them by their proper name and nobody includin me knew what stinkin kinda connector he was talkin about.

We are getting away from them very slowly, and getting to some that everybody hates, called Deustch Connectors. I have 3 or 4 brand new umbilicals I brought home awhile back that an electrician threw away cuz of the connectors.

I've soldered quite a few of them on ignition systems and sensors, also a couple times on my crane over the years. You have to start in the middle and have a plan. You'd also better know how to solder. You have to not let your thinking get reversed (while thinking backwards) if you do both halves of the connector. There's 4 views of these connectors.

2 things you would run into on this application. Wire gauges (plural) and physical size of the connector.
50 wires/pins and you would have a male swiveling nut about 2 1/2" diameter. 20 pins is about 1 1/4" maybe 1 1/2". That's for the knurled nut you tighten.
Then you would have different wire sizes from 12 up to 16 that require different pin sizes on the connector. Not insurmountable but it would make the connector harder to get and pricier. The big pins are usually in the middle.

Tim Smith
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