Question: Ac delco rapid fire plugs any good?

[JOHNNYB]

I JUST BOUGHT A SET AND WAS WONDERING IF THERE WORTH THE MONEY I PAYED FOR THEM? BECAUSE THEY WERE DOUBLE THE PRICE OF THE STANDARD AC DELCO PLUG.:ugh
THANKS

 

[Hib Halverson]

The Rapid Fire is a modest upgrade beyond a standard Delco spark plug.

 

[ShanoWA]

Plugs

I just put Autolite double platinums in mine.. definately runs better than the delco's that were in it. It would be interesting to hear what other members use tho

 

[TedC]

I've installed rapid fires on my 1989. I prefer them over stock delcos because they are less prone to surface rust and seem to run just a little better. I would install them again.

 

[boomdriver]

I've had good luck with the RF Delcos so far...

I CAN tell you to avoid the Bosch Plat-4 design. For whatever reason they did'nt burn clean and carboned up terribly. I think the GM HEI system just cannot generate a good spark thru that tiny positive electrode on the Plat-4 plug. They were caked with crud when removed. The Delcos burn a near perfect tan/white.