Best Spark Plug Selection
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I just looked in my Vette and I do have the hotter ones. They have been in all year since my new heads.
APP3926 Autolite Double Platinum Spark Plug
The APP3926 Autolite Double Platinum Spark Plug features platinum-to-platinum firing. Virtually eliminates gap erosion, reduces misfires, and provides 100K mile durability. It's the superior-performing spark plug providing preferred technology for DIS engines. 5 year limited guarantee.
APP3926 Autolite Double Platinum Spark Plug
The APP3926 Autolite Double Platinum Spark Plug features platinum-to-platinum firing. Virtually eliminates gap erosion, reduces misfires, and provides 100K mile durability. It's the superior-performing spark plug providing preferred technology for DIS engines. 5 year limited guarantee.
Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,738
Likes: 53
From: Bogart GA
Thanks!! I will get a set tomorrow and try them out. You still swear by solid lifters? I look at the badass website, wow, some amazing engines. Do you notice a difference between the 427 and 434?
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Cheap solid rollers don't last.
As to 7 more ci. It is good for less than 10 more foot pounds of TQ.
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
If you consider your car primarily for racing you have these choices
http://www.holley.com/types/4150%20HP%20Series.asp
otherwise look at the 80531
http://www.holley.com/types/Street%2...raditional.asp
http://www.holley.com/types/4150%20HP%20Series.asp
otherwise look at the 80531
http://www.holley.com/types/Street%2...raditional.asp
http://www.holley.com/types/Street%20HPs.asp
Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,738
Likes: 53
From: Bogart GA
I just replaced with APP3924's which should be an improvement, could not find the 26's in-stock anywhere. Runs better but still has a new found stumble off idle as I accelerate. It is definitely a "miss" fire. Momentarily sounds and feels like a cylinder has dropped out. Maybe wires, maybe distributor. The plugs are brand new and I doubt they could have fouled that quickly but who knows. Going to check the rotor and cap and hook up my wide band analyzer. New wires next.
