1974 302 (in a 1986 Mustang) with Windsor SR Heads -- What Spark Plugs?

andrewsg · 03-01-2007

Title dictates the question -- I have a 1986 Mustang Gt, with a 1974 302 in it -- its got a Victor Jr Intake Manifold,World Products Windsor Sr Heads, AED 650 Eliminator Carb, Longtubes, custom cam, etc.

Now it was originally running Champion Race Spark Plugs and I cannot remember what ones they were -- I'm looking to go back to Champions or use my NGKs that I currently have.

Catch is that the Car also has Nitrous on it -- a 125 shot. I am currently running one step colder (ngk plugs).

I want to go to champions or any other brand as I'm on my second set of ngks within 15k meanwhile the champions lasted like 40k.

Any ideas or suggestions as per what plug to run?

fast83 · 03-16-2007

I have been extremly happy with my autolites 3922 the temp rating on the autolites and most other plug (except NGK) the last 2 digits control it i used to run 3924 before I put spray on it then went to the 3922 hope this helps