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> Spark Plug reading Help
tornik550
post Jul 26 2010, 09:32 PM
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I am in the process of tuning my carbs. I had been dealing with some significant rich running issues that I posted in a previous post. That issue is resolved. Now, I am able to drive the car however it seems to hesitate at cruising speeds (2500k rpm). Idle seems a little rough.

I am a novice at reading spark plugs. I am looking for opinions on this plug. The other plugs look the same except the white on the electrode only goes a little past the curve.

I should note that the timing was a bit too advance and has been dialed back a slight bit.

My guess- little too rich, too hot of spark plug and timing too advanced.


Setup info-
Dual weber 40 idf- recently sync'd
idle jet- 60
mains-145
air correction jets- 200
emulsion tubes- f11
vents 32
Spark Plugs- NGK BP7ES
Engine- 2.27l

I should also note that I have a lot of spark plugs laying around. Doe anybody know if a NGK BP8ES is hotter old colder than BP7ES (think its colder).


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