exaust rap

[Eric]

has anyone used a exaust wrap to stop there extractors melting everything in sight lol. If so what brand ? and were they happy with the results ?

Thanks EC

[RAY185]

Don't know a brand name when it comes to the wrap
but I'll tell you something I heard before you fall into the trap.
While the wrap will do its job and hold in the heat
the moisture won't escape and you'll rust out your sh!t
*breakdancing*

sorry, I couldn't resist, its late, I've had a few......I think there's some tech in there.........somewhere!

http://www.modyourcar.com.au/product_in ... ts_id=1324

[Hoonz]

Don't know a brand name when it comes to the wrap
but I'll tell you something I heard before you fall into the trap.
While the wrap will do its job and hold in the heat
the moisture won't escape and you'll rust out your sh!t
*breakdancing*

sorry, I couldn't resist, its late, I've had a few......I think there's some tech in there.........somewhere!

http://www.modyourcar.com.au/product_in ... ts_id=1324

moisture evaporates with heat ... it will take a very long time for them to rust

i have a peice left over i'll soak it and throw it on the hot plate .... time how long it takes to dry

[RAY185]

Let me just say that I have absolutely no experience in using this stuff first hand. What I said about rust is what I have heard. While I agree with you that moisture evaporates with heat... , what about the fact that your headers have been sitting all night in the moisture? Sure they won't be moist for long once the engine has been running for a minute or 2 but that is little consolation for the fact that the already weekened steel (because there is so much trapped heat the metal apparently breaks down quicker) has been marinating in cancer promoting moisture while you have been alseep. If my theory is ok then maybe its only a good option for stainless headers or for people who are not worried about the longevity of their cast or mild steel headers.

Do a search on the net for exhaust wrap and rust and see what you come up with. But what the hell, do the bbq trick and let me know how you went!

[chops]

the brand of exhaust wrap I've used is High Energy

Haven't used it on my patrol, but I did use it on my L20 powered Datsun 180b - was necessary to prevent vapour lock (boiling the fuel in the bowls in the carbies)

Good for non crossflow engines (for the above reason)

Correct way to wrap headers is to dampen the wrap, and then wrap the collectors one at a time, with half the thickness of the wrap being overlapped, and secure at the bottom of each collector with a hose clamp (and at the top too), and then let the wrap dry naturally

I had about 6 foot of bandage,and it was just enough to cover a 4 cyl manifold up to the secondary collectors.. cost around $90

For a crossflow engine, I'd look at having the exhaust mainfold HPC treated.. and rip off that black underbonnet lining too

[chops]

exhaust wrap can also crystalize your exhaust system after a while

[bru21]

i useit on mine with s/steel headers. the mild steel headers do not cool properly and oxidise as they are at too higher temperature. nazcar etc use it and throw the headers after every race as they disintergrate.

[RAY185]

nazcar etc use it and throw the headers after every race as they disintergrate.

Yeah I've heard this too, god I wish I had that sort of budget!

So I take it no one liked my rap? I'm a lyrical genious let me tell yas!

[Jester]

I have had first hand experience with exhaust wrap, had a Mazda B2600 and got some extractors fitted to it as I had cracked the original headers, I had heaps of problems with excess heat as the heat sheild did not fit anymore so I tried the exhasut wrap bought from autobarn. To cut a long story short, 2 trips fraser, 1 to moreton and 6 months later i had to buy new extractors as the old ( 6 months old ) fell apart, and i mean fell apart. Never before had i seen such quick rust / corrosion before. Maybe the wrap is ok to use if you dont do any beach work, but if you do I would not even think of using it at all, I kept my truck clean and well maintained as well.

Cheers

[turps]

Try this stuff
http://www.jet-hot.com.au/

I know some guys that are using this on there turbos and the first section of exhuast.
Maybe pm Juzza and Sparky, pretty sure they are both using it.

[murcod]

From what I've heard manufacturers won't warrant any extractors that are fitted with heat wrap. Apparently the trapped heat destroys them quickly?

I did have some fitted after the turbo on a vehicle I owned many years ago and didn't have any problems (but also can't remember how long it was fitted before I sold it!)

Have you thought about making a heat shield instead to cover the extractors? Something like the factory shields that go over the cast manifolds?

The ceramic type coatings mentioned above are supposed to be really good.

[benjamin78au]

yeah but the coating is really expensive, i got a quote of i think 1000 for extractors, but it is cermaic that gets layered and set in place, not just apaint.


bj