New pipes and nothing else?
Road Warrior
Joined: Aug 2011
Posts: 1,335
Likes: 3
From: Ca.
It's normal for stainless, you can polish it out, but it will always do it. most good exhaust systems are made of stainless, mine is all 304 stainless including my welds.
There is a way to coat it inside that can prevent it, I have never tried it so not clear what you use, but my partner was telling me about it.
There is a way to coat it inside that can prevent it, I have never tried it so not clear what you use, but my partner was telling me about it.
So why do you think the mfg. said what he said to me about the lack of tune?
Ultimate HDF Member
Joined: May 2008
Posts: 6,642
Likes: 48
From: Ogden, UT
The exhaust temps are certainly hot enough to discolor metal.
Road Warrior
Joined: Aug 2011
Posts: 1,335
Likes: 3
From: Ca.
Thanks Rich,
Your grasp of all this and ability to substantiate it all never ceases to amaze me. It's people like you who know what they are talking about and then willing to share what they know with those of us who don't... are some of the main reasons I come to this forum so often. I've learned a lot... so far just enough to make me dangerous though, lol.
The science of it all is becoming more and more interesting to me as I go along. Thanks bud.
Your grasp of all this and ability to substantiate it all never ceases to amaze me. It's people like you who know what they are talking about and then willing to share what they know with those of us who don't... are some of the main reasons I come to this forum so often. I've learned a lot... so far just enough to make me dangerous though, lol.
The science of it all is becoming more and more interesting to me as I go along. Thanks bud.
Ultimate HDF Member
Joined: May 2008
Posts: 6,642
Likes: 48
From: Ogden, UT
I have read so many different theories on different forums, I just like to do my own research. I have read guys that think yellow means running rich, running lean, just right...Opinions run the gamut, the facts are easy enough to find and understand.
Exhaust gases probably run upwards of 1200 F as they are expelled, takes a lot to heat metal to over 700 F which is what the reading I posted above show. I believe those were from an AI mag article, but not sure, they ran some independent tests, and I tend to trust the independent stuff from AI.
Exhaust gases probably run upwards of 1200 F as they are expelled, takes a lot to heat metal to over 700 F which is what the reading I posted above show. I believe those were from an AI mag article, but not sure, they ran some independent tests, and I tend to trust the independent stuff from AI.
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