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Old 08-04-2025, 11:11 AM
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Shiny Shiny is offline
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Join Date: Nov 2008
Location: Windsor CO
Posts: 2,481
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I'm sure you are happy it's working better now!

I expected higher voltage to generate higher cranking rpm, but seems not for you...



Quote:
Originally Posted by GOAT8U2 View Post
Exact same everything, battery swap done within minutes of each other logs.

Napa 800cca = 11.4v cranking average
Antigravity 30hd = 12.2v cranking average

....
Quote:
Originally Posted by GOAT8U2 View Post
So early results...

Napa 800cca battery, 190rpm cranking, ....

Antigravity ATX-30hd battery, 140rpm cranking .....

Can anyone explain why a battery delivering higher voltage to the same motor wouldn't make it spin faster? Is this because the Antigravity battery can't deliver as much current, even at the higher voltage? In other words, is the torque of a starter motor current-limited, independent of voltage?

Mike