Spark plug reading

[ian_uk1975]

Stumbled across this tonight... had no idea you could glean SO much from the plugs...

Spark Plug Reading

Makes very interesting reading.

Cheers,
Ian.

[slogger]

Originally Posted by ian_uk1975

Stumbled across this tonight... had no idea you could glean SO much from the plugs...

Spark Plug Reading

Makes very interesting reading.

Cheers,
Ian.

Hmm.... Yes interesting, but I think you may need to get out more Ian

[ian_uk1975]

Originally Posted by slogger

Hmm.... Yes interesting, but I think you may need to get out more Ian

Haha, yea, you're probably right!

[mikey]

Originally Posted by ian_uk1975

Haha, yea, you're probably right!

Interesting read, but my advice is ignore it unless you are tuning the moggy.

Two problems on the Cob is that they go out on too many short runs and many are tuned with open plenum inlets and high initial advance etc to compensate for a low pulse with long overlaps etc etc etc.

My plugs are always slightly black in colour and I have never had them tan - the engine was set up on a rig and is right for the cam and set up.

Mike

[dingocooke]

This is old info, and sadly not relevant if you are running unleaded fuel, you just cant read plugs on unleaded the same.

[Clarkson]

I agree with Mike, my plugs are all different colours esp at idle with different runners on the intake.

[wilf]

Aah - the lost art of tuning engines via plug colours............so many memories.

[mikey]

Originally Posted by wilf

Aah - the lost art of tuning engines via plug colours............so many memories.

Bit like judging a woman by the way they walk - you cant do it any more they all walk the same no shaking hips and sublety of come on.

Or is it age and poor memery.

Mike