So..why are my tips black all the damn time?
Yea, stop f___ing with your tips. It's rich. I've seen it come and go depending, not only on the overall A/F, but also on your driving style. If you run in an RPM band where it's rich, they will get black.
Originally Posted by 350ZMASTA
WHAT R U THINKING?????????
DO YOU KNOW ANYTHING BOUT CARS, OR DO YOU JUST READ MAGAZINES......THE BASIC PRINCIPLE :YOU OPEN UP ONE END, YOU HAVE TO FOLLOW THROUGH OUT. I KEEP ON LOOKING AT YOUR MODS, ALL BUT NO HEADER. YOU SAY U HAVE SVRT EXHAUST SYSTEM MADE FOR TWIN-TURBO APP. BUT YOU HAVE NO TUBRO.....NO TUBRO.........THEN WHY HAVE IT.
THATS JUS FOR THE SAKE OF GETTING NOTICED.......JUS LIKE THOSE RICED OUT HONDAS.......
DO YOU KNOW ANYTHING BOUT CARS, OR DO YOU JUST READ MAGAZINES......THE BASIC PRINCIPLE :YOU OPEN UP ONE END, YOU HAVE TO FOLLOW THROUGH OUT. I KEEP ON LOOKING AT YOUR MODS, ALL BUT NO HEADER. YOU SAY U HAVE SVRT EXHAUST SYSTEM MADE FOR TWIN-TURBO APP. BUT YOU HAVE NO TUBRO.....NO TUBRO.........THEN WHY HAVE IT.
THATS JUS FOR THE SAKE OF GETTING NOTICED.......JUS LIKE THOSE RICED OUT HONDAS.......
Registered User
Joined: Jun 2006
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From: Chi-town
Originally Posted by 350ZMASTA
WHAT R U THINKING?????????
DO YOU KNOW ANYTHING BOUT CARS, OR DO YOU JUST READ MAGAZINES......THE BASIC PRINCIPLE :YOU OPEN UP ONE END, YOU HAVE TO FOLLOW THROUGH OUT. I KEEP ON LOOKING AT YOUR MODS, ALL BUT NO HEADER. YOU SAY U HAVE SVRT EXHAUST SYSTEM MADE FOR TWIN-TURBO APP. BUT YOU HAVE NO TUBRO.....NO TUBRO.........THEN WHY HAVE IT.
THATS JUS FOR THE SAKE OF GETTING NOTICED.......JUS LIKE THOSE RICED OUT HONDAS.......
DO YOU KNOW ANYTHING BOUT CARS, OR DO YOU JUST READ MAGAZINES......THE BASIC PRINCIPLE :YOU OPEN UP ONE END, YOU HAVE TO FOLLOW THROUGH OUT. I KEEP ON LOOKING AT YOUR MODS, ALL BUT NO HEADER. YOU SAY U HAVE SVRT EXHAUST SYSTEM MADE FOR TWIN-TURBO APP. BUT YOU HAVE NO TUBRO.....NO TUBRO.........THEN WHY HAVE IT.
THATS JUS FOR THE SAKE OF GETTING NOTICED.......JUS LIKE THOSE RICED OUT HONDAS.......
Oh yeah, probably just like that.
Be cool.
Originally Posted by undrgnd
Yea, stop f___ing with your tips. It's rich. I've seen it come and go depending, not only on the overall A/F, but also on your driving style. If you run in an RPM band where it's rich, they will get black.
I disagree... I had the worst black tips, and my AFR was slightly lean (before tuning)
Like I said, this probably happens the most on cold start, where the engine automatically runs rich, and since the exhaust pipe starts out cold, the hot soot particles stick to the cold exhaust tail pipe.
Coincidentally this kind of hot-particle sticking to cold-surfaces comes up in my research a lot at UCLA...
Originally Posted by Wired 24/7
I disagree... I had the worst black tips, and my AFR was slightly lean (before tuning)
Coincidentally this kind of hot-particle sticking to cold-surfaces comes up in my research a lot at UCLA...
Coincidentally this kind of hot-particle sticking to cold-surfaces comes up in my research a lot at UCLA...
Originally Posted by Wired 24/7
I disagree... I had the worst black tips, and my AFR was slightly lean (before tuning)
Like I said, this probably happens the most on cold start, where the engine automatically runs rich, and since the exhaust pipe starts out cold, the hot soot particles stick to the cold exhaust tail pipe.
Coincidentally this kind of hot-particle sticking to cold-surfaces comes up in my research a lot at UCLA...
Like I said, this probably happens the most on cold start, where the engine automatically runs rich, and since the exhaust pipe starts out cold, the hot soot particles stick to the cold exhaust tail pipe.
Coincidentally this kind of hot-particle sticking to cold-surfaces comes up in my research a lot at UCLA...
Originally Posted by 350ZMASTA
WHAT R U THINKING?????????
DO YOU KNOW ANYTHING BOUT CARS, OR DO YOU JUST READ MAGAZINES......THE BASIC PRINCIPLE :YOU OPEN UP ONE END, YOU HAVE TO FOLLOW THROUGH OUT. I KEEP ON LOOKING AT YOUR MODS, ALL BUT NO HEADER. YOU SAY U HAVE SVRT EXHAUST SYSTEM MADE FOR TWIN-TURBO APP. BUT YOU HAVE NO TUBRO.....NO TUBRO.........THEN WHY HAVE IT.
THATS JUS FOR THE SAKE OF GETTING NOTICED.......JUS LIKE THOSE RICED OUT HONDAS.......
DO YOU KNOW ANYTHING BOUT CARS, OR DO YOU JUST READ MAGAZINES......THE BASIC PRINCIPLE :YOU OPEN UP ONE END, YOU HAVE TO FOLLOW THROUGH OUT. I KEEP ON LOOKING AT YOUR MODS, ALL BUT NO HEADER. YOU SAY U HAVE SVRT EXHAUST SYSTEM MADE FOR TWIN-TURBO APP. BUT YOU HAVE NO TUBRO.....NO TUBRO.........THEN WHY HAVE IT.
THATS JUS FOR THE SAKE OF GETTING NOTICED.......JUS LIKE THOSE RICED OUT HONDAS.......
New Member
Joined: May 2017
Posts: 607
Likes: 96
From: Sweaty South NC
This guy makes a reasonable argument for why the tips get caked. I don't recall my tips getting so full of soot when I was stock but now, after having cleaned tips inside and out and then a few hundred miles later, they're full of soot again. I've done a little reading on the subject, wondering if I am running rich and wasting fuel but more importantly, leaving some ponies on the table and this answer and the previous one by the same guy above is the best I've found yet. Is there more to the story?
Naturally aspirated with full bolt-on's and tuned by a FI oriented tuner. The pic below is after approx 300 miles. They were spotless. The soot comes off easily, that's not my concern. Am I loosing power as a result?
New Member
Joined: May 2017
Posts: 607
Likes: 96
From: Sweaty South NC
Yeah, figured that. Still curious if anyone's got anything above and beyond what the most logical explanation I've found yet, being what I referenced above. Seems like FI cars tend to be the dirtiest while a Hemi Charger that I walked past in a parking lot had unusually clean tips, inside and out. The car itself wasn't exactly spotless, so I assume this engine burns really efficiently. Lean and mean. I'm not concerned about the cleanliness as I am the reason for the build up and if I'm loosing power from running rich.
New Member
Joined: May 2017
Posts: 607
Likes: 96
From: Sweaty South NC
Maybe water injection will keep'em clean. I look at this soot as a possible symptom of a potential problem, the problem being that the VQ's apparently run a little too rich from the factory per some of what I've read and my tuner is not used to naturally aspirated tuning.
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