Header Wrap/Jet Coating

[Will_in_China]

So...
GM finally decides to cover my pass side manifold with a hole in it.

They said I could, "Do whatever I want" before they go in...

I REALLY want to reduce engine comp. temps.
I have heard some horror stories about wrapping though.
i.e. cracking and catching on fire.
Is this the overwhelming majority?

Can I get the same performance or better from Coating them?

Search engine yielded only one item relavent and it was cracking.
I distinctly remember reading about somebody catching fire though.
Are they all friggin' flamable?
You think they would have this addressed by now!


Thoughts, success, horror stories?

 

[GEN3Typhoon]

So.. how did you get them to cover it?

Mine is cracked.. though not like your is... I have a surface crack.. from that big ass (relatively speaking) turbo hanging off of there.

 

[Will_in_China]

Big Nick!

What is up man!!!!

GM Warranty, purchased from Dealer, when Jeff Scott hooked me up.

Bought both my trucks that way!
GM gets to deal with the stupid stuff!



-w

 

[leroy]

The fires are a result of oil or transmission fluid leaks. The wraps absorb or hold in larger quantities of oil that are ignited by heat from the exhaust.

Without a wrap, small leaks are vaporized or burnt off without starting a fire.

HTH,

Jim

 

[GEN3Typhoon]

Ahh.. the old extended warranty.

By the way.. your secret is out... bald people everywhere will now know the truth.....

LOL... It is good you finally came to the dark side... doors will open for you now.... people will like you... beautiful women will take their clothing off for you....

 

[InvisiBill]

The August 02 Car Craft has an article about header coatings. Painted headers were 524 degrees, ceramic coated were 201. There wasn't much difference in dyno readings, but they had the engine mounted on a stand, not in an engine compartment, plus there were huge circulation fans nearby.

You're supposed to coat the inside also. This keeps corrosive exhaust gas off the metal (so they don't disintegrate from the inside). It also keeps the metal itself cooler, so it isn't fatigued as much.

I'd like to get my downpipe and exhaust housing coated when I do some upgrades in the future. Wrap would be cheaper, but I've heard of the fire problem, as well as trapping moisture and causing the metal to rust much faster also. Some sort of coating just seems like "the right way" to do it...

http://www.jet-hot.com/

 

[Will_in_China]

Well those numbers sound pretty fuckin' low!
SWEET!
What is an equiv. wrap worth on temps?

I'll just coat both the friggin manifolds inside and out while they are off.
Anybody done this with (eek!) stock manifolds?
Anybody got a REAL Cost? Will call jet-hot though.
I wonder if I can keep them not-so-dramatic-looking, as in color options.
Like the welfare-factory look.
Cheatham said there is a local place in Erie that does it...
This all just might work out!!!


-Will

The August 02 Car Craft has an article about header coatings. Painted headers were 524 degrees, ceramic coated were 201. There wasn't much difference in dyno readings, but they had the engine mounted on a stand, not in an engine compartment, plus there were huge circulation fans nearby.

You're supposed to coat the inside also. This keeps corrosive exhaust gas off the metal (so they don't disintegrate from the inside). It also keeps the metal itself cooler, so it isn't fatigued as much.

I'd like to get my downpipe and exhaust housing coated when I do some upgrades in the future. Wrap would be cheaper, but I've heard of the fire problem, as well as trapping moisture and causing the metal to rust much faster also. Some sort of coating just seems like "the right way" to do it...

http://www.jet-hot.com/

 

[Will_in_China]

Ahh.. the old extended warranty.

By the way.. your secret is out... bald people everywhere will now know the truth.....

LOL... It is good you finally came to the dark side... doors will open for you now.... people will like you... beautiful women will take their clothing off for you....

With a haircut like that, wouldn't you shave too?!?!?

Oh and their clothing comes off as long as Trisha approves!
:wink:

 

[InvisiBill]

Well those numbers sound pretty fuckin' low!
SWEET!
What is an equiv. wrap worth on temps?

I'll just coat both the friggin manifolds inside and out while they are off.
Anybody done this with (eek!) stock manifolds?
Anybody got a REAL Cost? Will call jet-hot though.
I wonder if I can keep them not-so-dramatic-looking, as in color options.
Like the welfare-factory look.
Cheatham said there is a local place in Erie that does it...
This all just might work out!!!


-Will

Jet Hot's website has a form you can fill out, with part descriptions and dimensions, and they'll email you a quote. http://www.jet-hot.com/pages/getestimate.php

Sterling™ (silver finish/1,300°F)

Cast Iron Gray (1,300°F)

Matte Black(1,300°F)

Ford Engine Blue

2000 Gray

2000 Black

2000 Blue

I'd think that the gray or black would be pretty low-key... Blue would be pretty sweet on a blue-accented truck, with the Hi-Miler hoses and vac lines and all that...

No idea how much wrap would do. But it'd basically be the same as the outside-only coating, as far as trapping all the heat inside the metal and causing it extra fatigue. And since it's not a coating right on the metal, you'd still have the problems of moisture and stuff getting between the metal and the wrap. I believe JS coated his new downpipe and exhaust housing (the pics he had of his and Jas' shortly after he did them). Maybe he knows something...

 

[Will_in_China]

Dude, you are a fuckin' rock star...

MUCH THANKS.

-w

Well those numbers sound pretty fuckin' low!
SWEET!
What is an equiv. wrap worth on temps?

I'll just coat both the friggin manifolds inside and out while they are off.
Anybody done this with (eek!) stock manifolds?
Anybody got a REAL Cost? Will call jet-hot though.
I wonder if I can keep them not-so-dramatic-looking, as in color options.
Like the welfare-factory look.
Cheatham said there is a local place in Erie that does it...
This all just might work out!!!


-Will

Jet Hot's website has a form you can fill out, with part descriptions and dimensions, and they'll email you a quote. http://www.jet-hot.com/pages/getestimate.php

Sterling™ (silver finish/1,300°F)

Cast Iron Gray (1,300°F)

Matte Black(1,300°F)

Ford Engine Blue

2000 Gray

2000 Black

2000 Blue

I'd think that the gray or black would be pretty low-key... Blue would be pretty sweet on a blue-accented truck, with the Hi-Miler hoses and vac lines and all that...

No idea how much wrap would do. But it'd basically be the same as the outside-only coating, as far as trapping all the heat inside the metal and causing it extra fatigue. And since it's not a coating right on the metal, you'd still have the problems of moisture and stuff getting between the metal and the wrap. I believe JS coated his new downpipe and exhaust housing (the pics he had of his and Jas' shortly after he did them). Maybe he knows something...

 

[ed hess]

fwiw

the jet hot on my headers is flaking in spots!
ed

 

[Will_in_China]

fwiw

the jet hot on my headers is flaking in spots!
ed

ARGH!

Coat the Coating!?!?!?



-w

 

[myclone]

My .02..

Coating the stock manifolds will prolly be a whole lot more durable than doing headers as there is a LOT more mass so they arent heat stressed quite as bad as headers. I kinda buy into the theory that the coating on tubular steel headers traps the heat in the metal once its up to temp and fatiques(sp?) it more rapidly. NA guys dont see this prob IMO as their exh temps are relatively low but us turbo ppl see elevated exh temps just under normal steady state driving. If that theory is correct then coating a turbo applications headers prolly accellerates the fatigue(sp?) factor where as a NA never gets to a temprature level that fatigues(sp?) the base metal even at WOT in the first place.

I believe Jet Hot has a super high temp coating available in black and gray (I think its gray...been a while since I looked) that is good to ~2200 deg F. IMO that coating would prolly be the way to go on a turbo application.

The wrap does make a difference in temps but as was mentioned if it gets soaked with oil/trans fluid/whatever it can catch fire. So if youre a sloppy fluid person (snicker..) then ceramic coating would prolly be best. I have wrap on my dp (snicker again) so Im concious of spilling anything on it that would be flamable. Wrap is kinda ugly compared to coating too but its low budget so Im all about it. :wink:

Just my .02 FWIW.

 

[ed hess]

yeah and my extra .02

i have that 2k coating in gray.

still some flaking.....

ed

 

[myclone]

yeah and my extra .02

i have that 2k coating in gray.

still some flaking.....

ed

Its not just the coating thats flakey... (sorry Ed, couldnt resist)

 

[ed hess]

ouch..man that stung

ed

 

[spooldup]

I wrapped my atr headers and there are cracks all over. ATR fixed them for free under warranty but warned against doing it again. I will probably leave them bare if i install them again.

 

[InvisiBill]

fwiw

the jet hot on my headers is flaking in spots!
ed

Did you have them coated inside and out? Just wondering, as I have no real-world experience with this yet. Just lots of reading at this point...

 

[InvisiBill]

Coating the stock manifolds will prolly be a whole lot more durable than doing headers as there is a LOT more mass so they arent heat stressed quite as bad as headers. I kinda buy into the theory that the coating on tubular steel headers traps the heat in the metal once its up to temp and fatiques(sp?) it more rapidly. NA guys dont see this prob IMO as their exh temps are relatively low but us turbo ppl see elevated exh temps just under normal steady state driving. If that theory is correct then coating a turbo applications headers prolly accellerates the fatigue(sp?) factor where as a NA never gets to a temprature level that fatigues(sp?) the base metal even at WOT in the first place.

If you coat the inside too, it should help this. Then the metal itself is also insulated from the heat of the exhaust gases. With just the outside coated, the metal can't radiate heat out to the atmosphere like it would uncoated. This causes the metal to get even hotter. With the inside coated, you don't have as much heat going into the metal in the first place...

Personally, it seems like coating just the inside would be better than coating just the outside, if you had to pick just one.

 

[Anthony]

FWIW, I had my stock manifolds coated inside and out with the gray Jet-Hot 2000. The cost to do the 3 pieces was ~$200. I can't say how well it works, though, as the Ty isn't running right now.

Anthony
92 Ty<---NOT a 10 sec. Ty