I decided to check how my charging was so I started the car up cold(82 720) and on idle voltage across the battery was 14.5.
I turn my headlights on and my heater fan to max. Voltage dropped to about 14.05
Still good I thought but I let it sit and idle for a little while and as it got a little hotter and the rpms dropped the voltage dropped and at idle it was about 13.5 without lights and fan and 13.03 with. I thought it was because of the lower rpm's but even when revving it to what it was when cold it wouldn't go up to more than 13.5-13.7.
Why does it charge more at the same rpm when it's cold but not when it's warmer