TheSamba.com :: View topic

Sun Aug 24, 2008 3:15 pm

Bosch, NGK? Copper or Platinum? This is for a daily driver around town and highway use.

Sun Aug 24, 2008 3:32 pm

COPPER.

Either brand is fine. W8AC for Bosch, don't know NGK p/n's

Sun Aug 24, 2008 5:18 pm

Thanks for the reply.

You feel strong about the copper! Why copper over platinum?

What's the difference between the W8AC and the W7AC?

Sun Aug 24, 2008 7:28 pm

7AC's are colder plugs, good for heavy buses. Some folks swear by the NGK's, it's just personal preference.

Sun Aug 24, 2008 7:43 pm

I used platinums for years. They have a bad rep here from most people. Seems that if you have a clean new engine, the plats are fine (as mine were), but when you get an older engine, they tend to foul.

I liked them because I didn't have to R&R them to gap them, and risk stripping the heads. I got tired of putting inserts in, and replacing heads.

But after the engine wore, then sat for years, it ran poorly with them when I started running it again. New copper plugs cleared up the idle and gave me more power.

So I'd recommend the plats only for a recently rebuilt motor. All others, stick to copper.

Sun Aug 24, 2008 7:46 pm

I'm one of those that will never use a platinum plug again. W8AC Bosch for me, or the new WR8AC+ whenever my stock of the older ones runs out.

Sun Aug 24, 2008 8:02 pm

glutamodo wrote: I'm one of those that will never use a platinum plug again. W8AC Bosch for me, or the new WR8AC+ whenever my stock of the older ones runs out.

I have a stock of about 50 or so left, of the W8AC's. I need to start rationing them. I even found some W145-T1's in this last batch of stuff I bought.
And I got a sand blast spark plug cleaner.

Mon Aug 25, 2008 6:22 pm

You can sand blast your older spark plugs and bring them back to life? Does the inside electrode ever degrade?

Mon Aug 25, 2008 7:30 pm

Depends on what you mean by rejuvinate. More like, clean all the crud off of them. Blasting them with sand or media won't do anything about worn electrodes.

Spark plug blaster/cleaners are cheap, but require you have like 90-120PSI of compressed air to run them.

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=32860

Mon Aug 25, 2008 8:46 pm

clean and regap at every 10,000 miles and they can last 40,000miles with cleanings. sometimes maybe 50,000