grounding....

[IDIoit]

what are your opinions of grounding the batteries to the chassis, and then the chassis to the block?
that would make life a little easier.
batteries are in the back.

 

[Macrobb]

As long as the resistance is low, sure. So, if you need to do that, use the frame(not the body), clean everything really well and use some anti-oxidizing compound. It'll probably work, because the total area of the frame is quite large, so even though steel is a poor conductor, your overall resistance should be low.

 

[laserjock]

That’s how mine is.

 

[Clb]

Killer ground's NEVER FAIL.
Weak one's do.
LOW resistance is the key.
Think copper braid and nolox

 

[laserjock]

I made cables that I bolted to the frame via drill and tap bolt.

 

[Pork_Chop50]

@IDIoit if memory serves me correctly isn't that race vehicle territory? OEM does it bats to block for engine chassis combo, but if the build is definitive (@laserjock looking at you) then game on. I like the copper braid, and I'll guarantee if you stroll past some older class 8/9 trucks you'll see some examples.

 

[Thewespaul]

You can go overkill can do both, but either way will suffice. It’s not really race territory, a lot of heavy equipment and trucks use this design.

 

[Dieselcrawler]

My 86 has been like that for years. Batteries are behind the cab. None of my ground cables are longer than 16 inches, all 2/0 cable. 3/0 running from battery to lug on frame up front for positive. Then from that lug out to starter and everything else.

 

[IDIoit]

thanks guys.
I didn't think there was an issue, ive done it in many many cars.
but the fact is, these are not cars.
I was fishin for people with ill effects, but im glad to hear there are none!

 

[Dieselcrawler]

when i did it, every ground strap got replaced with a larger one. even though mine has hardly ANYTHING electrical on it i still wanted the assurance.

 

[IDIoit]

when i did it, every ground strap got replaced with a larger one. even though mine has hardly ANYTHING electrical on it i still wanted the assurance.

im a big fan of 2 ga when it comes to grounds other than the battery which I usually go 2/0

 

[OLDBULL8]

YUP, voltage flow is from +Pos. to -Neg. , Current flow is from -Neg to +Pos. So it's accentual to have good grounding wires and clean and tight ground points on the Negative side.