Spark plugs at 7 1/2 psi

[mazdaspeed75]

What you guys think? Still looks rich to me. Been in for a month or so . I am looking for a place to dyno next week. What should my air fuel ratio be at wot. I have heard alot of differnet answers. So i have a ion fmic apex 2.5 downpipe injen cai and greddy profec b going in next week @ 9 psi . What is safe and what do you guys running my setup feel safe with your cars on the wideband . Thanks Tony ps Will post if i get to dyno

 

[MazdaSpeeder00]

How often are you supposed to replace plugs?

 

[igdrasil]

Better be safe than sorry!

This is a plug that shows some detonation on my protege @ 10psi.
At least thats what I think, the tip looks green!

 

[mazdaspeed75]

h

OH NO GREEN ON MINE. JUST LOTS OF BLACK ON IT mY. STOCK PLUGS WERE THE SAME WHEN I PULLED THEM THIS IS HTE COLDER PLUGS. looks like its running rich still. Yea someone told me that if it was detination it would look like they were sandblasted.

 

[Brian MP5T]

I don't understand what you are trying to say...

They are fouled...Yes?

Clean them. Unless you have a way to adjust the A/F ratio curves on your ECU, I really don't see the problem. Just run them.

 

[igdrasil]

OH NO GREEN ON MINE. JUST LOTS OF BLACK ON IT mY. STOCK PLUGS WERE THE SAME WHEN I PULLED THEM THIS IS HTE COLDER PLUGS. looks like its running rich still. Yea someone told me that if it was detination it would look like they were sandblasted.

You are fine, however, if you want to check if your plugs are getting hot or not, check the tip, if the clearer part takes more than the half of the tip then you are running lean. If its in a very small part of the tip then the plug its too cold and running rich.

If you see mine, the greener shows detonation and plug getting HOT, notice it has more than half way of the tip.

 

[DiscreetSpeed]

they look good from the pics dude...
when i hoped on the dyno it was between high 11 and low 12's on the wideband.
and i have the same thing you got...pls a cut out.
what plugs are those you have?
imo 12psi is nice for your setup...again the ecu pumps enough fuel the concern would be detonation and on a t-25 pushin 12 psi it shouldnt be a problem.

 

[acidbug]

Looks like you are runnin rich..which is a good thing..i would suggest no boosting over 9psi..unless you run race fuel or get a piggy back unit!

Chas

 

[mazdaspeed75]

h

I don't understand what you are trying to say...

They are fouled...Yes?

Clean them. Unless you have a way to adjust the A/F ratio curves on your ECU, I really don't see the problem. Just run them.

Iwas just wondering how they looked because iam going to boost to 9psi sometime this week . I have hit fuel cut at around 10 or 11 here. .

 

[mazdaspeed75]

they look good from the pics dude...
when i hoped on the dyno it was between high 11 and low 12's on the wideband.
and i have the same thing you got...pls a cut out.
what plugs are those you have?
imo 12psi is nice for your setup...again the ecu pumps enough fuel the concern would be detonation and on a t-25 pushin 12 psi it shouldnt be a problem.

the one step colder ones bkre7s what you running

 

[DiscreetSpeed]

i put the stock ones back on man..definitely felt a difference when switching them back over to stock...ill try and catch you on aim and tell you what "i" think about the colder plug hooya.

 

[igdrasil]

On the mazdaspeed, since they are running very rich, a hotter plug will burn the fuel more effectively.

 

[MazdaSpeeder00]

How often are you supposed to replace plugs?

i guess everyone is missing this little post lol (poke)

 

[igdrasil]

i guess everyone is missing this little post lol (poke)

i dont know, I check them every 2 months, I see detonation the I change it instantly!
I dont want them marked

But you should be fine changing them every 3 months

 

[MazdaSpeeder00]

i dont know, I check them every 2 months, I see detonation the I change it instantly!
I dont want them marked

But you should be fine changing them every 3 months

holy s***, i better change them then.........awwww still got the same ones in there. Will Midas change them?

 

[igdrasil]

holy s***, i better change them then.........awwww still got the same ones in there. Will Midas change them?

I had the last set for 8 months, still working PERFECT!!!! 8grade plugs

 

[MazdaSpeeder00]

I had the last set for 8 months, still working PERFECT!!!! 8grade plugs

yeah, but this could explain my hesitation right? Im flashed.