How hot do headers & exhaust get on a early 911?(Powder Coating)+Microslicking?

[klober23]

I was thinking about powder coating my headers and exhaust on one of my '65 911's. There is limited high temp colors available. The other powder coating I am looking at is rated at 400 degrees. Think this would last? Also why we are on the subject anyone here ever used "microslicking". The process is to coat the metal (anything that has friction, engine or otherwise) with a teflon substance that then soaks into the pores and lubricates creating a durable and lubricated contact. I was just curious....do or don't do? If so what to do and what not to do? Thanks

[lateapex911]

no...
I have never put a EGT on my 911, but my rotary race car sees exhaust temps in the 1600F range.

I have goofed around with an temp gun on my 911 and after driving, while cooling off I saw numbers way higher than 400.

I was on Pelican Mikes site today, and see he is doing some exhaust coating. I would look intoi that, there are other benefits to it than cosmetic. And there are a number of companies in the game. Swain Coatings comes to mind.

[MotoSook]

Ceramic coating...we do it for local folks, but there are places that can perform it closer to you. Jet Hot is a common name.

[lateapex911]

Yup! MotoMotions...THAT's the name I couldn't remember! I got my Smart bar from them, good guys.

[MotoSook]

You sure we didn't ship you the senile bars by mistake? LOL!

[lateapex911]

LOL...nope, but the senile guy did the install.


I snapped lots of pics...I think Mike asked me too, but I never sent them your way...my bad. Here's a couple, if you want I can email the rest.

[304065]

Well, the good news is that no concours judge can fault you for having non-original heat exchangers on your '65, because these were the subject of a comprehensive safety recall by Porsche due to potential CO leakage. I have never seen a set on a car or for sale, only in the factory manuals. Search here to find my thread on those.

Now, if you are going for originality, the original '67 heat exchangers were a color called "Dove grey" which paint is available. Knowing the beating that HE's take, I plan to have mine jet-hot coated in a grey ceramic that will be an approximation of the original.

As far as additional power from the coating or dry film lubricant, I would consider the effect negligible-- we might go from 130 to 130.2 horsepower. If you were vintage racing where money is like water that gets poured in, I'd say go for it: vintage racers in Europe regularly spend $50k building 10,000 rpm screamer 2,0 motors that hold together for 10 hours.

Good luck!

p.s. Jake nice suspension-- do you have a full writeup coming?

[lateapex911]

Thanks John, no plans for a write up, I figured the PolyBronze/Smart Racing sway bar thing had been covered to death, as has my homebrewed powder coating.

The WEVO rear SPS is pretty cool stuff though!

[Bill Verburg]

For headers, Jet Hot or equivalent is the only way to go

[tom1394racing]

I just had my headers, megaphones and muffler coated with an aluminum/ceramic coating by Airborn Coatings

http://www.airborncoatings.com/index3.html

Very impressed with the results. $500 for everything.

[jtratza]

$30 in VHT rattle cans and 8 months later they still look freshly painted. I bead blasted everything at a friends shop then I started painting the cat bypass, and then figured it wouldn't hurt to paint the crossover pipe since it looked lousy and then what the heck the HE flanges looked like they could stand some help so painted everything. Oven baked it all (wife dosen't use it anyway) according to the instructions on the can. Tom Butler's looks $1,000 better but this works.