Leanest cylinder on steel head 440

[rick4106]

What spark plug does everyone check. Number 1 is easiest. Lol

 

[Mrmopartech]

I check them all,if time is allowed to make sure I am getting proper fuel distribution to all cylinders,mrmopartech

 

[mguner]

It also makes a big difference what intake manifold you are using....

 

[Daves69]

I seem to recall the rear plugs tended to run rich at the track.

 

[IQ52]

The leanest cylinder will be the last one you check, so you have to check them all.

 

[BigBlockMopar]

I always start with the last one...

 

[moper]

The leanest cylinder will be the last one you check, so you have to check them all.

Or the one you don't...
In my experience, #7 or 8 are usually the leanest but you really should watch them all. It only takes one bad cylinder to break something.

 

[TrailBeast]

All of them, but if I want to just do a quick check I look at the A/F ratio gauge.

Seriously though, For quickie check I like to do at least one on each side if I don't have the time or whatever for all of them.

 

[hangn0ut]

Single plane intake,#5 is a decent choice for leanest.

 

[famous bob]

Single plane intake,#5 is a decent choice for leanest.

thot it was # 7. it was on my intake , the manifold has everything to do w/ it!

 

[hangn0ut]

That pair like to feed off each other.

 

[rick4106]

we run a M1 intake

 

[hangn0ut]

Is this the car running methanol? If so are you aware that reading the plugs is a whole nuther language?

 

[famous bob]

Is this the car running methanol? If so are you aware that reading the plugs is a whole nuther language?

have your intake flowed, then there would be no doubt about it. you might want to work on the lowest flowing runners a little.

 

[rick4106]

Have egt sensors in collectors. Wanted to put on two leanest cylinders

 

[IQ52]

Yeah, well in my experience the the hottest egt cylinders are very often the richest. Because, the excess fuel in burning in the header.