Hi guys!
Changing headers on my Chevy SBC and desided to do a comp test while at it. ( all 8 cylinders at 200 psi, so happy me)
Anyway, found some hard deposits on some spark plugs. And I wonder what it could be. I do run a lead additive so might have overdosed on that ? I also changed the distributor , running 36 degrees all in at 2500 rpm.
Those are the only changes I made between putting these new plugs in and now.
Running NGK BP6FS plugs.
The old plugs didnt have this problem ( AC DELCO RT45) .
I know that the plugs look very very black here, but that's 99% sure because I just ran the engine for 40 seconds to drive it up the ramps on choke. ( dont think its oil burning, no smoke and no oil consumption)
Happy to hear your thoughts. I was thinking it might be overheating the plugs or pinking ( wouldn't hear it in this car, it's too [censored] loud) .
Changing headers on my Chevy SBC and desided to do a comp test while at it. ( all 8 cylinders at 200 psi, so happy me)
Anyway, found some hard deposits on some spark plugs. And I wonder what it could be. I do run a lead additive so might have overdosed on that ? I also changed the distributor , running 36 degrees all in at 2500 rpm.
Those are the only changes I made between putting these new plugs in and now.
Running NGK BP6FS plugs.
The old plugs didnt have this problem ( AC DELCO RT45) .
I know that the plugs look very very black here, but that's 99% sure because I just ran the engine for 40 seconds to drive it up the ramps on choke. ( dont think its oil burning, no smoke and no oil consumption)
Happy to hear your thoughts. I was thinking it might be overheating the plugs or pinking ( wouldn't hear it in this car, it's too [censored] loud) .