Re: NGK Spark Plugs..
 

Spark plug test article from Andy...

https://www.yenko.net/attachments/spa...lug%20test.pdf

Re: NGK Spark Plugs..
 

Suprisingly old AC Delco is right there.

Re: NGK Spark Plugs..
 

Called NGK yesterday to find out what to run in my stock 70 LS5. He said the replacement for the R43T is a NGK 2405.

Not sure if I really got the warm and fuzzy from this guy....But that is what he told me.

Re: NGK Spark Plugs..
 

I just may have to give a set of NGK's a shot in the ol' LS-6 of mine and see how they compare to my usual plugs.

Re: NGK Spark Plugs..
 

Our AC Delco Store up here is telling us that NGK had been making the Delco Plugs for the last 3-4 Years.

Kevin

Re: NGK Spark Plugs..
 

I just read that same article today and my question is: what is the difference between V Power and G Power on the NGK plugs?? The NGK G power were the ones tested and rated #1 in this article and they actually added almost 7hp on the dyno according to this article.

Re: NGK Spark Plugs..
 

Looks like V Power is more of a standard plug, while the G power has a smaller tip- which is generally accepted as the prefered design with air gap plugs.

I have seen multiple electrode plugs make more power on small turbo engines, so to state the obvious- these results may not carry accross all engines. Regardless, NGK makes a good plug.

Although precious metal plugs do cost more money, the value is not as much in performance as it is in plug life. I also beleive most precious metals are not as conductive as say conventual materials.

Those mystery plugs are kind of neat. They require less energy to jump the gap since it is able to travel across the surface rather than having to jump through the air. I tend to beleive the old combustion chambers were designed with a conventional spark plug. Most multiple electriode plugs, surface gaps and such just aren't ideal for our old engines.

Having the spark fire form a tiny tip works with a conventional design. Unfortunately the tiny surface is much more suceptible to errosion form spark so you'll probably only see them in precious metals. I think it would be great if they made a set with conventional materials for the increased conductivity, but they wouldn't last long, and it they erroded too quickly then it could actually effect the tuen of the engine. Sorry for the ramble.

Re: NGK Spark Plugs..
 

Rob , does a cross reference list exist for the G power NGK's.?

Rehashing an oldie here. Folks still prefer the NGK plugs in the L78/LS6 engines.?

Yes, NGK over all others.