IMHO it sounds normal. That's one of the downsides to a generator and the main reason I put a 6v alternator on my '38. Lights at 8v will be brighter than lights at 6v. At idle your generator isn't charging so when you rev it up the lights get brighter. My '62 Biscayne which has a generator does that as well.


Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.