Exhaust Wrap

[robwright]

Whilst I am undertaking my mini engine rebuild I am thinking of things that could future proof the engine should I wish to further modify in the future. So I am thinking of lagging the headers and crossover pipe. Has anyone done this? Is it worth it and what material did they use. I have found a supplier here The medium grade stuff isn't too expensive but would the cheapest stuff do on a turbocharged engine?

 

[944 man]

DEI wrap is best. Keeping the gas hotter = greater flow, but keeping the manifold hotter = component failure.

Ceramic coating is better.

 

[colin944]

If you are going to wrap your manifold etc then remember to paint it with flame resistant paint.You can get stuff they use on light aircraft etc.It seals the wrap and stops it from absorbing any fluids (oil etc).If you wrap the manifold and it gets wet with oil power steering fluid etc then heats up you get an under bonet fire.Seen a few cars that have burnt as a result of wrap on manifold not sealed properly.

 

[bighead]

ORIGINAL: 944 man

Ceramic coating is better.

+1 ..as you will need to re-wrap the maniflow/downpipe every few years if you use exhaust wrap !!

 

[robwright]

The site I iwas looking at above does sell VHT paints but they are only good for 450 degrees so probably not for a turbocharged engine. The Magma Wrap they sell though claims not to need any high temp silicone sealing sprays. That was just what I turned up from a google search. Was wondering if anyone knew of a supplier that they had used with success.

 

[chrisg]

Rob

When I rebuilt my engine I had various bits of the exhaust and the exhaust ports coated with a ceramic heat material. This was done by a company somewhere near St Helens/ Wigan - I'll look them up for you and get you the details.

Chris

 

[GPF]

Hi Rob,

I used their wrap on Ferdie and it's been fine.

I used the Magma wrap on the manifolds down to the crossover, and the G Force wrap with graphite on the crossover and downpipe.

Rather than the stupid metal ties you get, I secured mine with stainless steel jubilee clips.

I don't subscribe to the "it will catch fire" school of thought - the theory is that the wrap will hold any oil against the hot manifold - but it will get straight on to the hot minifold without the wrap too and the high temps will evaporate it anyway. I did, however, make a shield for the crossover to stop it getting oil soaked.

The wrap still looks good - the Magma wrap on the manifolds in particular looks exactly the same as when I put it on.

Thermal coating is probably a "better" solution but it comes at a price!

Regards

Graham

 

[os951]

Have done it many times. Prepare at first to see a lot of smoke.... It will eventually stop []

 

[ralphmusic]

Google Zircotec, saw them at NEC.

 

[robwright]

ORIGINAL: GPF

Hi Rob,

I used their wrap on Ferdie and it's been fine.

I used the Magma wrap on the manifolds down to the crossover, and the G Force wrap with graphite on the crossover and downpipe.

Rather than the stupid metal ties you get, I secured mine with stainless steel jubilee clips.

I don't subscribe to the "it will catch fire" school of thought - the theory is that the wrap will hold any oil against the hot manifold - but it will get straight on to the hot minifold without the wrap too and the high temps will evaporate it anyway. I did, however, make a shield for the crossover to stop it getting oil soaked.

The wrap still looks good - the Magma wrap on the manifolds in particular looks exactly the same as when I put it on.

Thermal coating is probably a "better" solution but it comes at a price!

Regards

Graham

Graham is there a reason why you used two types. I noticed their unit length is 10m which I thought would be enough for the whole job or am I wrong? You also mentioned that you lagged the downpipe. I take it you mean the exhaust turbine outlet downpipe? How far did you lag this? The short section to the joint or further? Sorry for all the questions. Would love some pics if you have them.

 

[GPF]

Hi Rob,

Sorry for delayed response - I've been busy with my other modded car, getting mapped and dyno'd this weekend. []

I used 2 wraps because the manifolds get much, much hotter than the crossover. Can't remember how much I used but it was more than I originally thought I would need.

Yes, I did the downpipe off the back of the turbo between the flanges to protect the AOS casing - the 3" downpipe is much closer to it and is not double skinned.

There are A few photos in my Photobucket (blue link in sig) but I'll try to upload some others tomorrow evening.

Regards

Graham

 

[Diver944]

ORIGINAL: GPF

I've been busy with my other modded car, getting mapped and dyno'd this weekend. []

It's high time you posted a thread with pictures and details about this other turbo car. A good title would be 'I know it's not a 944 but.........'

I know I'm not the only one who wants to see it. Go on, you know you want to []

 

[GPF]

[][][]

As you already know, Paul, not only is it not a 944 it's not even a Porsche and I could therefore be excommunicated!

I'll upload some photos to photobucket tomorrow.

Regards

Graham

 

[GPF]

Hi Rob,

As requested here are some photos []

Making the crossover shield

The crossover wrapped

and with shield fitted

Downpipe wrapped to protect AOS

Headers wrapped in situ

All the wrap is still fine and mostly looks about the same as when I did it - the magma wrap on the headers is still perfect!

Regards

Graham

 

[robwright]

Thanks Graham I particularly like the crossover shield. Quite a useful addition as the potential for contamination from a leaky crank seal in that area is quite real. Think I may definitely do this []

 

[GPF]

No problem, Rob.

If you do make a crossover shield, you need to get it to fit fairly closely or you will have clearance issues with the sump.

Regards

Graham