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Thread: more than you ever wanted to know about wire

  1. #11
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    Default Re: more than you ever wanted to know about wire

    Very good post. I deal with almost all of those everyday. Hand ties (lace ties) are a pain to do. Very hard on your hands. They have coatings on them that causes your skin to dry up!! Especially when doing it for hi vib applications.

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  2. #12
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    Default Re: more than you ever wanted to know about wire

    Great info figgie. There are a couple of things you might want to add.

    First, a warning should be made that Kapton wiring needs to be avoided. The insulation used on it is very poor at tolerating mechanical wear. And if used in an automotive application I'm sure vibration would cause the insulation to break down. I've had peices of gear comes off aircraft that you could flick the wire with your finger and the insulation would crack and flak off. Due to this defect I've done enough rewires on aircraft equipment to truly hate the stuff.

    Second when looking for lacing the best type to get is the wax impregnated stuff. It has better holding properties than the standard Nylon stuff.

    Also, lacing does demand blood sacrifices when used for over 4 hours. Part of my job entails building jet engine harnesses, and there have been days when my hands got pretty tore up. But I doubt anybody would see that level of use during a stand alone install.
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  3. #13
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    Default Re: more than you ever wanted to know about wire

    Ron and Dirgle

    Thanks for the input.

    Kapton sucks! That is of course the trademark name, the generic being Polyamide

    Wow, I can't believe it has been one year since I posted that (almost!).

    Dirgle. On the lacing. TOTALLY Agree. But 20 feet of car will never ever be the same at 150+ ft of airplane fuselage or 40 feet of cramped WING! lol.
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  4. #14
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    Default Re: more than you ever wanted to know about wire

    Quote Originally Posted by figgie View Post
    Ron and Dirgle

    Thanks for the input.

    Kapton sucks! That is of course the trademark name, the generic being Polyamide

    Wow, I can't believe it has been one year since I posted that (almost!).

    Dirgle. On the lacing. TOTALLY Agree. But 20 feet of car will never ever be the same at 150+ ft of airplane fuselage or 40 feet of cramped WING! lol.

    Doing the lace tie on my my own wire harness was fun, I even tied the whole bundle every six inches We normally just require one tie per foot here at work!!

  5. #15
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    Default Re: more than you ever wanted to know about wire

    Quote Originally Posted by jt2ma71 View Post
    Doing the lace tie on my my own wire harness was fun, I even tied the whole bundle every six inches We normally just require one tie per foot here at work!!

    Ron,

    lol

    And I bet people ask... "How did you do that!!"

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    Default Re: more than you ever wanted to know about wire

    where do you find mil spec connectors. for like a harenss if i wanted to do a quick isconect at the firewall to pull the harness with the motor

  7. #17
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    Default Re: more than you ever wanted to know about wire

    Quote Originally Posted by JZa80 View Post
    where do you find mil spec connectors. for like a harenss if i wanted to do a quick isconect at the firewall to pull the harness with the motor
    I got mine from MoTeC.

  8. #18
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    Default Re: more than you ever wanted to know about wire

    i get mine from places like A.E Pesche

    Need a business or mil-Contract to order through them though. Actually most aerospace parts business do but these mil connectors are not cheap. The stuff for a firewall pull through (ie a bulkhead connector), you are looking at $150+ dollar for the bulkhead connector plus another 200 for the connectors on each side. This assumes you have the appropiate crimpers with positioners though! Otherwise add another $300 for those.

    Now if you are looking at a "autosport" connector (same stuff as the Mil-C-39999 except that it is black), you then only have two choices. Pi Research or IS Motorsports (which I have accounts on both). The bulkhead connector will be your biggest expense after tools.
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    Default Re: more than you ever wanted to know about wire

    On engine harness, do it like a Honda.. Bout a ft from firewall is a connector.

    Now on the deutsch connectors have you guys ever had issues where the pins wouldn't make good contact and result in not working properly or intermediate signal loss. When I worked on diesels the whole bus was built off deutsch connections and the engine harness would always pull this 1397 connection crap..

  10. #20
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    Default Re: more than you ever wanted to know about wire

    Quote Originally Posted by Mk3runner View Post
    On engine harness, do it like a Honda.. Bout a ft from firewall is a connector.

    Now on the deutsch connectors have you guys ever had issues where the pins wouldn't make good contact and result in not working properly or intermediate signal loss. When I worked on diesels the whole bus was built off deutsch connections and the engine harness would always pull this 1397 connection crap..

    Not autosport/Mil-C-38999.

    If it is a bad connection..

    99% of the time is due to a crap crimp. The pin and socket... no issues there.
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