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painting extractors 

 

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Posted: Tue May 15, 2007 3:16 pm 
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FordFairmont wrote:
My advice would be to wrap the pipes up in exhaust wrap before fitting to the car, better flow, and less heat in the engine bay.


Exhaust wrap doesn't effect the flow at all - it's on the outside of the pipes, the gas is flowing inside!
There's also a downside to exhaust wrap in that it compromises the pipes - they excess heat and the heat being trapped to them often causes the pipes to be weakened.

 

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Posted: Tue May 15, 2007 3:45 pm 
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twr7cx wrote:

Exhaust wrap doesn't effect the flow at all - it's on the outside of the pipes, the gas is flowing inside!


So you dont know what im talking about?

Heres some info on exhaust wrap, even though i think you already know.

http://www.stockcarproducts.com/insulat2a.htm
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Posted: Tue May 15, 2007 5:25 pm 
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i think that you will find that the problems caused by the exhaust wrap happen because it can retain some moisture, inturn causing the pipes to rust...

 

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Posted: Tue May 15, 2007 5:50 pm 
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FAST-XR wrote:
i think that you will find that the problems caused by the exhaust wrap happen because it can retain some moisture, inturn causing the pipes to rust...


And from overlapping the wrap too much causing hot spots in the tubing.
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Posted: Tue May 15, 2007 7:05 pm 
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has anyone got a pic of a I6 with heat wrap? i dont really like the look of it, but according to that site exhaust gasses will flow better... might be better then painting ???

 

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Posted: Tue May 15, 2007 7:19 pm 
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huggiebear wrote:
has anyone got a pic of a I6 with heat wrap? i dont really like the look of it, but according to that site exhaust gasses will flow better... might be better then painting ???


Yeah it costs a fair bit too, couple rolls i think are needed for a six.

Can buy here...
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Posted: Tue May 15, 2007 7:26 pm 
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stuff that... the wrap would cost more then the extractors are worth (well more then i paid for them)

 

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Posted: Thu May 17, 2007 12:37 pm 
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my stainless exhausts will turn all sorts of colours from a blue black at the head to a yellow as the exhaust gas cools. There is even some slight pitting corrossion and pitting in the hottest (blue black) areas. I assume this may vary somewhat with different grades of stainless but it is not a good look IMO.

There is a variety of paints you can use - personally I think black is boring. Look in the motorbke accessory shops they usually carry them. Every one I have seen has clear instructions on the can. Normally cure on the motor, and it works.

I had my pipes painted on the inside with some supposedly ceramic paint to help retain the heat. I could not notice any difference.

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Posted: Fri Jul 20, 2007 4:31 pm 
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Here's my effort over the last couple of days. These are the headers I mentioned I scored for a steal.

For preparation I wiped them down with a rag, and rubbed them back a bit with 120grit wet n dry.

Being in ACT it's fkn cold so, I did warm the headers and paint up a bit (tricks from paint r/c bodies) by laying them in front of the inbuilt gas heater for about 20mins. They were now ready to to paint outside.

Hit them with the rag again, and then began to thinly dust them with VHT - Flameproof Header Paint. It's like the old stuff, but appears to be rated higher now, up to 1093'C (2000'F), it's also labeled as Ceramic Coating.

I'm happy with the adhesion and visual result. There are instructions on the can for curing once fitted too. They fkn look like new now! Hope to get fitted next week with a new hi flo cat, and the lukey sys I got as well.

 

 

Attachments:
File comment: Before Painting
Pacemaker 4499 005a.JPG
Pacemaker 4499 005a.JPG [ 108.83 KiB | Viewed 36 times ]
File comment: Before Painting
Pacemaker 4499 006a.JPG
Pacemaker 4499 006a.JPG [ 97.05 KiB | Viewed 39 times ]
File comment: After Painting
Pacemaker 4499 painted 002a.JPG
Pacemaker 4499 painted 002a.JPG [ 140.22 KiB | Viewed 37 times ]
File comment: After Painting
Pacemaker 4499 painted 003a.JPG
Pacemaker 4499 painted 003a.JPG [ 101.8 KiB | Viewed 42 times ]
File comment: VHT FlameProof Nu-Cast
Pacemaker 4499 painted VHTa.JPG
Pacemaker 4499 painted VHTa.JPG [ 82.44 KiB | Viewed 34 times ]

 

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Posted: Fri Jul 20, 2007 4:47 pm 
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I used the exact same stuff on mine, and that s**t doesnt impress me at all. The colour goes crap after a few weeks and bits and pieces are flaking off.

Also its really hard to work with, very runny stuff, unlike other paint this stuff seems to run very easily.

Hey, im wondering if i were to strip the paint and polish the headers, would they stay shiny you reckon?
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Posted: Fri Jul 20, 2007 5:02 pm 
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i got the same stuff but in black. they came up a treat...

FordFairmont, as stated above "mist" it over the extractors that way it grabs on then you can go a lil heavier over the top.

and for the flaking bit, if you didnt clean and prep it properly first up (as will all things) it wil flake off

 

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Posted: Fri Jul 20, 2007 5:05 pm 
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Yeah but i got the shiny aluminium colour, im assuming its got a different consistency to the flat colors, as most luminous can paints do.
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Posted: Fri Jul 20, 2007 5:06 pm 
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FordFairmont wrote:
I used the exact same stuff on mine, and that s**t doesnt impress me at all. The colour goes crap after a few weeks and bits and pieces are flaking off.

Also its really hard to work with, very runny stuff, unlike other paint this stuff seems to run very easily.

Hey, im wondering if i were to strip the paint and polish the headers, would they stay shiny you reckon?


I hope mine turns out ok!

It sounds like you've hit it too thickly on 2 points, the fact it's flaking off suggests to me it's built up too much in some areas, plus the fact you got runs while doing it.

The 3 things I remember when painting is
Prepare the surface: Clean and lightly rub back the surface the paint is going to be applied to.
Prepare the paint: Shake the sh!t out of the can, and warm it up a bit. Sit the paint can in a bucket / ice-cream container with warm-hot water for a little while.
Apply the paint: And finally, you've got to just dust it on, don't try and colour it all in one go.

As for no paint / polishing, I reckon some oxidation may occur if it's not sealed.. either that or you'll be wiping the pipes down all the time to keep em looking shiney.

 

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Last edited by locknut on Fri Jul 20, 2007 5:10 pm, edited 2 times in total.

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Posted: Fri Jul 20, 2007 5:07 pm 
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ah ok fair enough. i have used a few different brands of paint and i like VHT and the ones from supercheap. wouldnt touch any other ones

 

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Posted: Fri Jul 20, 2007 5:08 pm 
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I think Septone do some hi temp stuff also, but don't think it's rated as high. I've used the VHT stuff before, and I'm happy with it.

Got some Ford Dark Blue VHT engine enamel for my rocker cover, which I'll paint next.

 

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