Aluminum and grounding - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 8 Old 05-31-2006, 05:21 AM Thread Starter
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Aluminum and grounding

Im just about ready to wrap up the EFI conversion on my 82GT, and at 2:30am, became curious. Can you ground to aluminum? I ran the ground wire from the injector harness to the upper intake stud, to keep things neat and accessable. Put a nice ground strap from the back of the aluminum head accessory bolt hole to the firewall. And as i was looking for a more tidy way to ground the negative battery cable...Even if i grounded to the lower intake manifold bolts....it would still be to the aluminum head... Please give me some advice as my brain hurts and i just want to make sure i have the best grounds i can for this ol girl. Thanks guys, and go easy on me!


-1982 Mustang GT, T5, 3.73s, EFI'd 408W, soon to be parted and retired
-1991 Notch, numbers matching 2.3l auto, all motor!
-2003 DSG Cobra, 2.8, intake, exhaust, tune, basics.
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post #2 of 8 Old 05-31-2006, 05:35 AM
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Aluminum is conductive, just not as much as iron. Your best bet is running the neg cable to the block, then another 2awg cable from the block to the back of the head where the other ground is connected. Believe it or not, having a good ground these EFI cars is very important. I saw a jump in fuel pressure at WOT after adding a better ground from my battery relocation.


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post #3 of 8 Old 05-31-2006, 06:25 AM Thread Starter
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Cool, thanks 93, i believe the good ground for efi thing for sure...basically why i was asking. maybe ill put an extra braided strap in just for the sake of it. Thanks for the late night....er....early morning reply, i just shut er down in the shop, so its bed time.
Brian

-1982 Mustang GT, T5, 3.73s, EFI'd 408W, soon to be parted and retired
-1991 Notch, numbers matching 2.3l auto, all motor!
-2003 DSG Cobra, 2.8, intake, exhaust, tune, basics.
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post #4 of 8 Old 05-31-2006, 07:23 AM
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Just so you know, power lines are aluminum. Power lines running to your house are aluminum. Aluminum is an awesome conductor of electricity.

I'd rather be on rope in a deep deep pit cave.
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post #5 of 8 Old 05-31-2006, 09:21 AM
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You DO NOT have to move all your grounds.Aluminum is a great conductor.
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post #6 of 8 Old 05-31-2006, 10:25 AM
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double post

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post #7 of 8 Old 05-31-2006, 10:53 AM
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anyone know the thread on the bolts the go into the back of the head? I switched to AFR's and my old GT40P's had a insert in there making the bolt diamter/thread smaller.
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post #8 of 8 Old 05-31-2006, 03:16 PM Thread Starter
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Hmmm JD, i could go measure one up for ya if you like, but if i remember correctly, there are 2 different sized holes? Notta prollum though if ya wish.
Brian

-1982 Mustang GT, T5, 3.73s, EFI'd 408W, soon to be parted and retired
-1991 Notch, numbers matching 2.3l auto, all motor!
-2003 DSG Cobra, 2.8, intake, exhaust, tune, basics.
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