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Old 07-03-2017, 05:50 AM
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Default Harness pass thru hole size

Hi What size hole did you use to get the main harness for your LS ECU through the fire wall?
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Old 07-03-2017, 09:00 AM
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Hi What size hole did you use to get the main harness for your LS ECU through the fire wall?
speartech grommet. Just matched a hole saw with that size.
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Old 07-03-2017, 12:15 PM
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2 inch....everything has to go from the cab to engine bay.....won't go the other way...

T,
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Old 07-03-2017, 12:40 PM
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Thanks guys

I was excited that we're getting close to wiring the motor then pulled the harness out of the box. Whole crap load of wiring. I'm just hoping there is not too much extra length in the main harness. I don't want to start cutting it up to shorten it.

Randy, that's the exact one I was looking at this morning. I called and they're closed for the holiday. I tried to find some where else that carried them but nothing showed up.

I'm going to come through the hole in the floor for the gas pedal linkage. My buddy has punches for electrical boxes so we'll use that to open it up.
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Old 07-03-2017, 12:59 PM
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Not sure if it'd be quicker here, but try this:

http://www.mouser.com/ProductDetail/...FB06epEg%3D%3D
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Old 07-03-2017, 04:23 PM
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I made a hole behind the motor
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Old 07-03-2017, 07:30 PM
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Quote:
Originally Posted by cpd004 View Post
Not sure if it'd be quicker here, but try this:

http://www.mouser.com/ProductDetail/...FB06epEg%3D%3D
That has to be installed on the harness during the building of harness, unless you "cut/ split them" length wise, but they dont seat or seal well sometimes when you do that
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Old 07-03-2017, 07:31 PM
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Quote:
Originally Posted by waynieZ View Post
Thanks guys

I was excited that we're getting close to wiring the motor then pulled the harness out of the box. Whole crap load of wiring. I'm just hoping there is not too much extra length in the main harness. I don't want to start cutting it up to shorten it.

Randy, that's the exact one I was looking at this morning. I called and they're closed for the holiday. I tried to find some where else that carried them but nothing showed up.

I'm going to come through the hole in the floor for the gas pedal linkage. My buddy has punches for electrical boxes so we'll use that to open it up.

be cautious as to how close that will place the trunk of harness near the #7 header tube
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Old 07-03-2017, 07:34 PM
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Quote:
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I made a hole behind the motor
Agreed with Randy

Behind engine, but alot of care and attention to measuring, engine placement and rear vac port of intake manifold
tape off firewall and lay it all out, then verify and interior conflicts (ie ac/ heater box, ducting, etc, etc) prior to punching any hole in it
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Old 07-03-2017, 08:45 PM
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Quote:
Originally Posted by jwcarguy View Post
That has to be installed on the harness during the building of harness, unless you "cut/ split them" length wise, but they dont seat or seal well sometimes when you do that
Correct. They have to be split and will seal fine. This is the same grommet that Speartech sells. I posted the mouser link and Delphi part number to give the OP an alternative way of getting it quicker.
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