May Day !! Down a cylinder

[philbilly]

Alright class racer mechanics. I need some help. I am down a cylinder. Nber 7 keeps fouling plug. I have changed plugs wire cap dist. I did a leak down got about 1 percent leakage. Compression is 165lbs all cylinders I pulled the intake and fitted it last night.
I connected a plug to wire and it is firing at the cylinder.
The cam loves and lifters are fine.

Any idea?? There is several of us scratching our heads on this one.

I put 170 lbs air straight to cylinder it ha no leakage out valves

[Greg Reimer 7376]

Intake valve guide or seal on that cylinder. Sounds like a properly sealed engine. If the intake or heads were very mismatched, it would have affected other cylinders as well.

[Chuck Beach]

Sounds like a leaky valve guide, you could put a little hotter spark plug in that cylinder to burn off the oil.

[philbilly]

Chuck we changed plugs and wires several times. I am thinking guide but if guide was wore it would show in leak down?
This is the new head we did fix. I busted one at gators.
Mb is gonna post up pic of plugs for me. I sent him pic of 1 and 7 plug so y'all could see

[philbilly]

Running with a temp gun number 7 never gets within 200 degrees of other cylinders.

[Michael Beard]

Posting for Phil:

[philbilly]

Thanks Michael. That is 1 and 7 plug I changed number 7 that is one run on that plug.

[M Brand 505B]

Does your cam have any of the cylinders swapped? I had two plug wires swapped on the dyno and the engine sounded decent but kept fouling out a plug. Also, what kind of top piston ring are you running? My plugs looked like that all the time when I ran a gapless top.

[philbilly]

Cam is norm firing order. All plugs look like 1 except 7. 7 doesn't never get hot like the rest. Head scratcher I have wore bald spots in my head since Friday.

[Rick Brown]

Give me your phone number so we can talk about it, PM or otherwise! Rick Brown