Lets talk about spark plugs heat range.

[Dark_5.0]

Originally Posted by ~The Jester~

Oh, JEEZUZ, here we go. Spark plugs are about as misinterpreted as tire sizes. I'll fill you in on what I know.

First of all, how often are you checking them? When you yank a plug, and it "looks like new" how many miles are on it? Stock engine? N/A, nitrous? etc etc.

Right now, it sounds like you're a bit lean to me, and really has nothing to do with the plugs.

Give us some more info, and we'll go from there, K?

I check them about every ten 1/4 mile runs (Track only car)

These plugs have been in the car for over 100 runs and still look new.

I had Box stock 192cc Canfield heads, ported cobra intake and an E303 cam on a stock short block.

My new set-up is The same 192cc canfield heads with a 5 angle valve job, blended bowls, unshrouded valves and minor port work.

Custom Flowtech Induction cam .566 lift 218 duration @.050 intake
.............................................566 lift 224 duration @.050 exhaust

Same ported Cobra intake for now all on a 30,000 mile stock shortblock.

I was worried the car was running lean before so I may really have issues now.

I am going to the track this Friday to try and get the new set-up dialed in as far as the timing and fuel pressure go. The only dyno here closed so i am going to have to tune at the track.