Big 3 on stock double batteries

[PESteele 10+ year member]

my van comes with 2 batteries and i want 2 do the big 3. Should i do an alt to battery posative and a neg to chassis for both or should i jsut pick one

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[imaspaceguy90 10+ year member]

both would give you more of an effect, hell do all the 3 wiring including the one to the engine block.

 

[PESteele 10+ year member]

i have 8 feet of wire so i might as well.

In doing the big 3 when you have to attach to the chassis is that include the body of the car

 

[johnecon2001 5,000+ posts]

chassis = body of car.

 

[PESteele 10+ year member]

chassis = body of car.

ok thanks for clearing that up