Engine ground strap

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Engine ground strap

Post by A_Tame76 on Sat Oct 23, 2010 10:27 am

Whats up guys? Wondering where you guys think is the best place to is to mount up the engine ground strap? My car doesnt have one, and I suspect it possibly could be affecting my alternator not charging properly. I have a new 100 amp alt and my battery has tested ok, yet Im only getting about 11 volts while Im running. Anyone have any experiences similar to this?
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Re: Engine ground strap

Post by oldstofty on Sat Oct 23, 2010 10:47 am

dont have any similar experiences but i just grounded mine to the firewall
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Re: Engine ground strap

Post by A_Tame76 on Sat Oct 23, 2010 10:53 am

so from the firewall to somewhere on the block, maybe a header bolt, or?
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Re: Engine ground strap

Post by Limey SE on Sat Oct 23, 2010 12:53 pm

mine I forgot to put back on A_TAME and its on the fire wall and goes to the back side of motor I am assuming the head hole or something of the like.

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Re: Engine ground strap

Post by oldstofty on Sat Oct 23, 2010 1:23 pm

yes easiest is fom the one of the holes in the back of the head. i grounded pretty much everything to the motor there. then ran a gound strap from there to the firewall
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Re: Engine ground strap

Post by A_Tame76 on Sat Oct 23, 2010 8:29 pm

well...put a ground strap on, from header bolt to the firewall....and still only at 11.8 volts....UGH!
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Re: Engine ground strap

Post by Limey SE on Sat Oct 23, 2010 8:43 pm

Jeff try the head not the header bolt, I put mine back side of pass side head for if I am thinking right.... the header gasket will slow some of that down ?? Am I correct on that one ??

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Re: Engine ground strap

Post by BlackChevelleSS on Sun Oct 24, 2010 1:50 am

My main battery cable goes from the battery to the front of the engine, then has a smaller wire going from battery to the core support, No problems here.

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Re: Engine ground strap

Post by JB2wheeler on Sun Oct 24, 2010 8:37 am

BlackChevelleSS wrote:My main battery cable goes from the battery to the front of the engine, then has a smaller wire going from battery to the core support, No problems here.
I had that system on my 70 Impala and the headlights would dim down real low and then get brighter. It was because of that wimpy raggedy wire going to the core support. JB
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Re: Engine ground strap

Post by A_Tame76 on Sun Oct 24, 2010 9:37 am

I currently have my negative battery cable going to my engine block too. Then I added the strap from the header bolt to the firewall. Ill try having it go to the head instead of the firewall like Limey mentioned.
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Re: Engine ground strap

Post by dragons_lair59 on Sun Oct 24, 2010 11:28 am

heads should have holes in back put short bolt in run from there to the fire wall. lots of gms had this. header dont do much as stated because of the gasket ads resistance

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Re: Engine ground strap

Post by A_Tame76 on Sun Oct 24, 2010 3:50 pm

Just thought of something, probably shouldve mentioned in the first place, but there are aluminum heads on this engine, should that effect the way it grounds?
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Re: Engine ground strap

Post by Limey SE on Sun Oct 24, 2010 4:21 pm

I would assume so but not sure .............

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Re: Engine ground strap

Post by The Dude on Mon Oct 25, 2010 10:07 am

So why not hit it from the block where the engine mount is & run it to the frame? Seems like a viable alternative if you make the ground strap long enough to compensate for engine movement.
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Re: Engine ground strap

Post by oldstofty on Mon Oct 25, 2010 6:08 pm

ground straps from advance auto are are cheap and like 12 or 18 inches
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Re: Engine ground strap

Post by 1973montec on Mon Oct 25, 2010 7:22 pm

in front of the engine under the alt,should be 2 threaded holes (air pump).just bolt the cable to there and the other end could go to an already threaded hole in the frame (like the pos battery clamp).
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