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351W Spark Plugs
Need help,
What would be the best spark plugs for a 351W high compression engine.
I have been running NGK AP5FS plugs that colour wise looked a little dark but ran ok.
I changed the plugs the other day and the parts guy recomended Autolite #33.
The problem is now the engine runs a litttle rough and the plugs are as black as soot.
Any recomendations?
Cheers,
Bryan
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COB-66 Young at heart old fart.
Don't drive faster than your guardian angel can fly.
If it doesn't matter what gear your in you have enough torque.
VK3KDN
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