The Weber spec sheet, says that the internal Alternator puts out 750 watts @12V nominal. Nominal means that this is an average, across the RPM range. Low at idle, high output at high RPM.
Now, minus from the 750 watts, Fuel pump , ECU, Gauges, Cooling Fan, starter and lights.
The battery in the circuit, acts as a buffer, helping out at idle and recharging at high RPMs.
So, the battery is very important.
A weak battery, throws the load onto the stator, that has a fixed output.
I've tried to get the Weber stater rewound, to put out more current or higher wattage. I was told by several businesses, that the MPE750 stator housing, isn't big enough to add more copper windings to.
You could put a smaller gauge wire in and get more wraps, but the small wire can't handle the higher current and would burn out.
We can add a bigger battery! This will extend our available current (watts), further. I added a bigger battery, 310 cca and moved it to the front of the car. The rrawtry race Riot, had a car sized battery to support radios and lights.
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