Spark plug reading

[BBKNARF]

After my drive around town my car wasn't performing as it should, I pulled all the plugs out and this is what I found.
I'm running a stroked 451, Holley 950cfm d.p., jet size 79 front, 84 back, 2.5 power valves front & back, Eddie duel plane rpm performer intake, Eddie heads, ngk plugs BCP6E S gaped at .045,
all MSD system, Firecore wires, total timing 36*, I know the basic plug reading but need a little help on whats going on the car was driving great at these setting before, what gives.

[lisiecki1]

carbon fouling?  were they wet at all?

[idahogrumpy]

In my opinion the plugs are too cold, the engine is rich, and the timing is a little too advanced. Grumpy  

[idahogrumpy]

You might also check your cap, rotor, and plug wires. Looks like some holes are firing better than others.  Grumpy
 

[BBKNARF]

You might also check your cap, rotor, and plug wires. Looks like some holes are firing better than others.  Grumpy
 

Every thing looks good, the plugs were not wet when I pulled them, also the plugs is what they reccomand for my combo.
36* total is what my motor loves, Ive tryed it lower and higher, its a guessing game, maybe I'll try running a hotter plug 

Frank

[firefighter3931]

The 6 series plug is perfect for that combo....don't change it. It's definately rich and there seems to be some variation between cylinders. You might have some clogged air bleeds which is richening up the mixture. Get some carb cleaner and try spraying both the idle and high speed air bleeds.

Frank, how much vacuum is your engine making at idle ? The HP carbs are designed for low vacuum and the fuel curve is quite agressive.



Ron

[BBKNARF]

The 6 series plug is perfect for that combo....don't change it. It's definately rich and there seems to be some variation between cylinders. You might have some clogged air bleeds which is richening up the mixture. Get some carb cleaner and try spraying both the idle and high speed air bleeds.

Frank, how much vacuum is your engine making at idle ? The HP carbs are designed for low vacuum and the fuel curve is quite agressive.



Ron

I will spray some cleaner in the air bleeds and see what happens, my vacuum is 8 at idle. The duration on my camshaft is 248/254 @ .050" lift