Which brand of spark plug are you finding the best with a fairly stock 350? I've had fouling issues with Champions and would probably go with either AC or NKG. What's your opinion?
Champion are crap. AC delco are good. never heard anyone complain about them. NKG is really good but more expensive. I'm currently using Bosch and I don't have an opinion one way or the other on them. So I guess that's a positive. That's my short answer
The brand shouldn't really determine whether or not they'll foul, it's the heat range. You probably have the wrong heat range plugs in it.
The type can affect fouling though. I've had the best results with the Bosch Platinum-4 for naturally aspirated. The tip runs good and hot, but does not cause detonation because of being such a tiny point. The 4 grounds ensure that there is somewhere solid for the spark to go. They'll fire off anything, even running too rich. Best bet would be some jetting changes though to run it cleaner too. The NGK V-Power are also good. That's what I'm running now, because the turbos don't like platinums.
As much as I hate to admit... my 350 had bosh plat 4s in it when I bought it. It idled smoother and ran better. I ended up trashing then because a lot of people said ac delco Anyone have a part number for the bosh plat 4s? Sorry not trying to thread jack:TU:
What year and what ignition/distributor are you running?? This will affect the heat range and plug type.
