Big 3 upgrade: grounding ALT directly to BATT?

[Mittelklasse]

Hi, I am planning to do the Big 3 upgrade, and here is my question:

Would it be better to connect a ground strap from the alternator body to the battery negative, rather than to the chassis?

I will be using 25 sq.mm. cable which is equivalent to 4 AWG.

My rationale is that in the stock setup, the alt was grounded to the batt via the engine ground strap.

By connecting directly from the alt to the batt negative, the reduction of resistance could be realized as there will be less connectors in the path.
(Therefore, lower voltage drop)

My car has stock audio system. I plan to do this upgrade mainly for engine efficiency and fuel economy.

[UberSilver]

Here's a link to my grounded Alt.

http://www.yarisworld.com/forums/showthread.php?t=38445

[Mittelklasse]

Originally Posted by UberSilver

Here's a link to my grounded Alt.

http://www.yarisworld.com/forums/showthread.php?t=38445

Thanks, Silver . I have already grounded the throttle body, the MAF (via one of it's nuts), and the ECU.

However, I'm still on the fence whether to ground the alt directly to the battery, or to the chassis.

[dragoonmc]

How did you ground the Throttle body?

[derickveliz2]

Here is my Big 3!




D.