should i go leaner on the main jets?

[sasilverbullet]

1970 Lincoln Mk III, 460 cu. in. engine.
Here's a brand new plug driven about 120 miles at 55-65mph. I also just changed the points, condenser, rotor, cap and wires.

Keep in mind I have leaky valve stem seals, not too bad, but it will puff some blue smoke after it sits a bit. That might be the reason for the oil accumulation. When I took the plug out the car had been sitting for about 3 hours.

So, should I go one leaner on the main jets?

 

[Charlie1935]

I wouldn't. Looks good to me.

 

[default]

Looks good for a carbed car.

 

[beast3300]

Its not carboned up, looks ok.

 

[Chris142]

looks great! I'm not too sure how well you can read plugs on today's gas. plus leaning it out will compound your pinging problem

 

[sasilverbullet]

Originally Posted By: Chris142
looks great! I'm not too sure how well you can read plugs on today's gas. plus leaning it out will compound your pinging problem


I got rid of the pinging problem by using Amsoil's Octane booster - one bottle per 15 gals of premium. Hasn't pinged since I started using it.

 

[Kestas]

I agree. The plug looks fine.

With E10 gasoline, classic car owners usually need to go a tad richer with the jets.

 

[Lyman]

I wouldn't touch a thing

 

[morris]

i wish my dakota plugs looked that good. just run some mmo.

 

[sasilverbullet]

Mmo? What's that?

 

[mechtech2]

Those original jets were for pure gas, NOT 10% alcohol.
They are already too lean.
Leave it alone and be happy.

 

[sasilverbullet]

Originally Posted By: mechtech2
Those original jets were for pure gas, NOT 10% alcohol.
They are already too lean.
Leave it alone and be happy.


Ok, I'm happy!

 

[lexus114]

Originally Posted By: sasilverbullet
Mmo? What's that?



Marvel Mystery Oil.