Minimal amp requirement

[gixrman]

What is the minimal amp requirement to operate the cars electrical system in race trim? i.e. no radio, no AC

 

[wrencher]

That can vary so much it's hard to put an exact number to it.
But just to run the car > coils, injectors, ECU fuel pump your looking at around 15 amps average on a street car.
Depends on the pump you have, igniton coils etc.
You might be over that by 10 amps.
The cooling fan can draw 12 to 25 or so amps too.

There really is no standard, they're all different. I know what I have seen over the 20 plus years of working on cars.
Know anyone with a good current probe to measure the electrical load?

 

[gixrman]

I'll have to see about that. Looking at two mini alternators 50, 75 amps.