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Posted by: d7n7master Dec 19 2004, 06:03 PM

Hi All,
Just a quick question - has anybody por-15'ed their heat exchangers? If so, how long did it last??

Posted by: Mueller Dec 19 2004, 06:14 PM

I'd check with the manufacture to make sure no hazardous outgassing can occur when subject to high heat.....hate to fry some brain cells (well, at least on accident )

Posted by: scott thacher Dec 19 2004, 06:31 PM

why not buy por's manifold paint

Posted by: Mueller Dec 19 2004, 06:43 PM

i'd still check, exhaust manifolds are not used as a source of cabin heat except for air-cooled engines

Posted by: JB 914 Dec 19 2004, 07:28 PM

They have a POR-20 which can take 1400 degrees and is for Manifolds and high heat applications. a little can goes a long way!!

Posted by: Mueller Dec 19 2004, 07:31 PM

I'm not trying to be paranoid here, but what happens when the paint gets heated to XXX degrees and you breath the vapors in an enclosed area such as the cabin of your car ?????

I think the oil that drips on the h/e's is bad enough...that cannot be good for

Posted by: StratPlayer Dec 19 2004, 09:52 PM

I painted my muffler with por20 grey, did it over a year ago, the paint stills looks as good as it did the day I painted it. Didn't touch the exchangers tho, I have SS exchangers. I have no problem with fumes or anything like that. Por 20 seems to be execellent high temp paint.

Posted by: BGman Dec 19 2004, 10:31 PM

Painted my muffler only with regular POR gloss black.
It has started to peel in places.

Posted by: Eric_Shea Dec 19 2004, 10:38 PM

I used POR-20 on...

Bursch Headers
Sport Exhaust
Regular 911 Exhaust and
911 Heat Exchangers

Don't know if it works though... Should be able to tell you in a week or so.


Attached image(s)

Posted by: Type 4 Dec 19 2004, 10:39 PM

Use Ospho for your HE's.

Posted by: d7n7master Dec 19 2004, 10:55 PM

All righty then. Seems as though nobody has died - yet... from fumes or immaculate combustion after applying por-15.
I read the inst. for por-20 & part of the prep includes por-15, sooo - por-20 is silver, por-15 is black. I could do without silver h.e.'s. So, if you apply por-15 & then por-20 does that not suggest that por-15 can hang in hi-temp applications??
Then again, I have POR WHITECOTE that I haven't even used yet.
---------
Has anybody else noticed that when por-15 drys - It is 'effin bullet proof???
Got a bit on my driveway, and my shoe, and my... - I'm in BIG trouble...

Posted by: anthony Dec 19 2004, 11:09 PM

QUOTE

I'm not trying to be paranoid here, but what happens when the paint gets heated to XXX degrees and you breath the vapors in an enclosed area such as the cabin of your car ?????

I'd think that you'd only want to apply Por20 or whatever only to the outside of the HE's right?

Why not just find a set of stainless HEs?

Posted by: JB 914 Dec 19 2004, 11:42 PM

you don't need to apply POR-15 first before the POR-20

just clean the surface really good. they have a POR-MarineClean that is good and no fumes. Then you can paint it with the POR-20.

I have used the aluminum colored POR-20 and it is great stuff. brushed it on and no brush marks

Posted by: Eric_Shea Dec 20 2004, 09:45 AM

POR-15 and POR-20 are not the same animal. POR-20 is not silver. It's Manifold Grey and I believe it comes in other colors. POR-20 is their high heat application paint for heat up to 1400 deg. F. POR-15 is not which is why you have the other list member stating that it is starting to flake off.

We sprayed the POR-20 on w/o a thinner. With the Bursch headers I didn't even install them before I stripped them and painted them with POR-20. There is no way that Bursch paint would have survived 1 minute under normal engine operating conditions.

Posted by: d7n7master Dec 20 2004, 10:16 AM

Unfortunately POR20 only comes in manifold gray.
I want the he's & muffler to be black.

Their website says "Black Velvet™ is the only black paint capable of withstanding extreme temperatures up to 1200° F."
http://www.prp-porstore.com/merchant.mvc?Screen=CTGY&Category_Code=HiTemp

I tried to find what temp por15 was capable of handling on their website but found none listed.

I'm gonna try the Black Velvet.
Thanks all, Gary

Posted by: Type 4 Dec 20 2004, 10:22 AM

This is the only true Hi Temp paint is this. I have used with great results.

http://www.hirschauto.com/acb/showdetl.cfm?&DID=27&User_ID=199416&st=4249&st2=-156081552&st3=603188819&Product_ID=11&CATID=1

Posted by: StratPlayer Dec 20 2004, 10:25 AM

I just ordered a couple cans of the alumn. paint yesterday, supposed to be a great product. Hirsch auto.