Big 3 Engine Block/Alternator Ground Options

[BanginBishi]

Quick question. After measuring up the first two wires I'm split between where to put my second ground. I'm going to be grounding from the alternator bracket and either

A. Following the stock grounding path (~2ft) to where the stock ground is located (Also right at, or 6" away from my battery ground.)

B. Going around 8" or less to a spot where there's a plate connected to the frame, put it in the gap and clamp her down there.

Reasoning for option B is "shorter path, less resistance, yatta yatta." I'm running 2/0 OFC if that matters.

Which should I go with?

Thanks in advance guys.

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[keep_hope_alive Premium Member]

i like using a factory ground point if the bolt is large enough.

the transmission housing usually has good threaded bolt holes you can reuse. the alt is well grounded to the block. i use them when possible to shorten ground paths. i don't use alt mounting bolts because ring terminals are usually too soft and the bracket isn't tight enough.

 

[adulbrich 5,000+ posts]

i like using a factory ground point if the bolt is large enough.
the transmission housing usually has good threaded bolt holes you can reuse. the alt is well grounded to the block. i use them when possible to shorten ground paths. i don't use alt mounting bolts because ring terminals are usually too soft and the bracket isn't tight enough.

I think that grounding to the alternator case is a great spot. I put ground wires between my alt case(s) and the mounting bracket(s). The other end can either go to the battery and/or a good spot on the frame.

OP, what kind of power are you running? 2/0 OFC can handle a lot of current in such a short run. Pick the most solid connection points even if they are a few inches further than the closest spot.