Ceramic Coating or Header Wrap

[xxdjfate76xx]

Originally Posted by gingermike Ceramic coat will protect the metal plus what makes you think and moisture wont evaporate due to the heat?

I mean if its ceramic and wrapped. The fiberglass in the wrap will contain the water. Not sure for how long while its hot, but definitely a long time if cold. You don't really have that problem because genone lol

[BigRedSpecial]

Originally Posted by xxdjfate76xx @gingermike; my concern is genpu hood scoop and rain. Lots of water easily makes its way back there trhough the scoop when front mount. How long have you ran that setup with no issues? Also I believe the quality of the wrap makes a big difference as well

That's why you coat/spray over the wrap instead of underneath it; keeps moisture out. My manifold stays bone dry, and it's never dry here.

Originally Posted by Nitr0EngiE I don't recommend putting a boot over exhaust housing mine is now warped and leaks where it mates to chra due to to much heat from turbo I had dei turbo blanket won't do it again if I replace hot side

Good to know... I guess that's a strong argument for the new NiResist hotsides

[xxdjfate76xx]

Originally Posted by BigRedSpecial That's why you coat/spray over the wrap instead of underneath it; keeps moisture out. My manifold stays bone dry, and it's never dry here. Good to know... I guess that's a strong argument for the new NiResist hotsides

Ill try that out thanks man, btw hows the car coming along?

[Chimmike]

Originally Posted by xxdjfate76xx I mean if its ceramic and wrapped. The fiberglass in the wrap will contain the water. Not sure for how long while its hot, but definitely a long time if cold. You don't really have that problem because genone lol

I don't think you're thinking this through dude.

The moment your car gets to normal temp, that exhaust manifold is so hot, it will evaporate any water in the fiberglass.......that moisture thing is a fucking old wives tale.

the silicone spray doesn't last for shit at the temps we generate anyways, and makes the fiberglass wrap all shitty.

want good wrap? Thermo-tec Copper or DEI titanium. Those two are the best.

[xxdjfate76xx]

Yea I have DEI titanium ready to go, just looking at all the options as I will be running tests on my ported manifold and can change around the setup of the wrap while im doing it. I suspect the ceramic companies advise against it because most people wont use the titanium wrap, the fiberglass garbage from pep boys is what theyre worried about

I work with boiler controls, heat transfer is affected by deposits from water itself. The process of the water evaporating with a wrap opposed to without a wrap may be different as far as how many deposits are trapped. Sorry, I look at all the negatives to find the positive, im mainly asking because it helps my testing if I get a few options to play with

[BigRedSpecial]

Originally Posted by xxdjfate76xx Ill try that out thanks man, btw hows the car coming along?

Car is running nicely but other than repairing accident damage (and body shop fuckups) it's in winter mode now, so progress will be on hold until spring.

Originally Posted by gingermike The moment your car gets to normal temp, that exhaust manifold is so hot, it will evaporate any water in the fiberglass.......that moisture thing is a fucking old wives tale. the silicone spray doesn't last for shit at the temps we generate anyways, and makes the fiberglass wrap all shitty. want good wrap? Thermo-tec Copper or DEI titanium. Those two are the best.

This. From everything I was reading before I decided to wrap my shit, the only objective evidence I could find of damage was mostly from old school guys wrapping mild steel, thin wall headers (ie, cheap truck/camaro/mustang parts).

For the record when I talk about spraying the wrap I'm talking about header paint, not silicone spray. The stuff I used:
VHT High Temperature Flameproof Header Paint | Canadian Tire

I used DEI titanium, sprayed with the VHT paint and everything (manifold, DP and RP) is holding up nicely 6 months later.

Originally Posted by xxdjfate76xx I suspect the ceramic companies advise against it because most people wont use the titanium wrap, the fiberglass garbage from pep boys is what theyre worried about

Another thing to keep in mind: if the ceramic company says "Sure, go ahead and wrap your coated part, it'll probably be fine", and it goes to shit, they/their coating gets the blame. CYA.

[Nitr0EngiE]

I use the dei ti wrap its amazing, just don't ever try to remove it after you bake it in, it will fall apart

[Chimmike]

most wraps will fall apart after several heat cycles. That's just how it is.

[xxdjfate76xx]

Originally Posted by BigRedSpecial Car is running nicely but other than repairing accident damage (and body shop fuckups) it's in winter mode now, so progress will be on hold until spring. This. From everything I was reading before I decided to wrap my shit, the only objective evidence I could find of damage was mostly from old school guys wrapping mild steel, thin wall headers (ie, cheap truck/camaro/mustang parts). For the record when I talk about spraying the wrap I'm talking about header paint, not silicone spray. The stuff I used: VHT High Temperature Flameproof Header Paint | Canadian Tire I used DEI titanium, sprayed with the VHT paint and everything (manifold, DP and RP) is holding up nicely 6 months later. Another thing to keep in mind: if the ceramic company says "Sure, go ahead and wrap your coated part, it'll probably be fine", and it goes to shit, they/their coating gets the blame. CYA.

Thanks! Yea that VHT spray is pretty much a diy ceramic. I may just try and cerakote the mani, wrap it and cerakote it again. Followed by an oven cure to see how that does.

[Sid3wayS]

Metal expands and contracts with heating cycles. The ceramic coating only have so much give to them. Repeated heating cooling can and will make cracks in a coating over an extended period. A manifold is hot enough to evaporate water yes but have you ever actually poured water on a mani while at operating temp? It doesn't evaporate off immediately. It sits and boils first. So if it is caught up in a fabric(the heat wrap) it would probably take even longer to boil/evaporate. The water can and will find its way into the cracks of the coating and will rust the exposed metal(remember parts are sandblasted to expose the metal before the coating is applied)
Of coarse all this would happen over time not one day to the next, but it is very probable and far from an old wives tale.

Originally Posted by gingermike most CHEAP wraps will fall apart after several heat cycles. That's just how it is.

Fixed

[CCPcoatings]

Originally Posted by Nitr0EngiE I bought some heat wrap and stainless ties then found a shop to ceramic coat my manifold for 130$ in black, so i will return the heat wrap and ties which was only 30$ and i got a turbo blanket for 60 my question is how well will the ceramic prevent the heat from going into engine bay or was header wrap still a better option.

You didn't say whether the manifold / header was SS or mild steel, but in either case ceramic coating it will reduce under hood temps. Wrapping it as well would be even better.

As for wraps and corrosion, obviously if its mild steel it is HIGHLY recommended you coat it before wrapping to reduce or eliminate corrosion. With SS you don't have such immediate corrosion issues. It doesn't matter whether the pipes actually get wet or not. Moisture will still make its way into the wrap / uncoated pipe via condensation.....

As for VHT and like type coatings providing "ceramic coating" in a can for $10.00, you'd need a qualified CSI unit to find any ceramic in there. All of those materials are traditional silicone based high temp paints, I.E. BBQ paint...... If applied properly, which they rarely are, they will provide a nice finish but they will offer little to no thermal or corrosion protection.....

[BigRedSpecial]

Hahaha I didn't apply it for thermal protection... I know better than that. All I use it for is a sealing agent to prevent the wrap from absorbing water and oil in particular. It also holds the wrap in place better IME.

I don't doubt that it's nothing more than high temp paint, but that's exactly what I bought it for. It's no replacement for real ceramic (obviously), but everywhere I've applied it it has held up well. It is temperamental when it comes to prep though.

It is nice to hear someone involved in ceramics support wrapping them though, thanks for the input.