making turbo manifold..

[jzk25]

For TIG the gas should be straight argon at ~6l/min, red tip 2.4mm tungsten, DC, ~5-7 shroud, ~90-100A, suitable filler.

The work has to be clean of any mill scale or paint or it will not weld. Same for filler wire, it needs to be clean too.

Looks good anyhoo. More pics of car with engine fitted required.

[Tweak]

straight argon is more expensive then mixed argon......... Id only use straight argon if it was on somthing that i wanted to show off eg a show install.

Tig can be a **** to get right if your not confident in using it. But as said it needs to be close to "medical" clean

[sheepers]

sweet merciful christ that must have made a racket.
ive got a bench top linisher because i cant afford a mill of my own. its sweet. you can make flat, curve, chamfer, anything external really and you can change angles at the drop of a hat.
if you dont got no money (like me) i recommend it as a way of getting sweet joints.


sheepers.

[brett_celicacoupe]

there was a little chatter but it wasnt actually run with that much pipe sticking out in the pic above. not as bad as you think


im leaning toward wrapping the manifold in kevlar now.

[o_man_ra23]

As poor as my manifold looks (Brett posted a pic above), it doesn't leak, the intake temps don't get about about 44deg C with a tiny chinese cooler, and it spools fairly quick. Plus my welding has gotten a billion times better since, but I can't be arsed making a new manifold. Maybe I should spend the time to grind the welds like Brett did??

C channel option is a great one, pity I didn't think about/get told about it before I started ended up with quite a surface to be flattened.

Let me know how the kevlar wrap goes, am considering doing the same.

[the_random_hero]

Don't wrap manifolds, blast then ceramic coat.

[JustenGT8]

Don't wrap manifolds, blast then ceramic coat.

well almost Ceramic coat and then wrap

[o_man_ra23]

Is there a particular reason manifolds shouldn't be wrapped?? Or is this something you have heard on teh intahwebs??

I would be more inclined to follow Justen's position, use the Ceramicoat to provide corrosion resistance and thermal insulation, then use the wrap as a second layer of thermal insulation.

[JustenGT8]

Only wrapping does a coupla things. It does appear to heat stress the metal more....some non coated bits i wrapped went all flakey. The wrap also seems to weirdly hold more mositure in so the part corrodes faster.

The ceramic coating protects the metal against the extar heat held in by the wrap, as well as from general corrosion plus working as another thermal barrier itself. For the minimal extra cost do both.

On my GT4 you could still touch the coated and wrapped DP after a hard run...farking hot no doubt but not 'peal your skin off' hot

[brett_celicacoupe]

thanks for the info.

so who does the ceramic coating and what does it cost?

[MWP]

The ceramic coating protects the metal against the extra heat held in by the wrap...

I cant see how this is possible?
The heat is being held in by the wrap, it gets there from the exhaust via the steel tubing.
Having the tubing coated doesnt mean the heat somehow "skips" it.

[brett_celicacoupe]

sounds like he is saying the outside of the pipe oxidizes badly with only wrapping (on steel pipe).

if the surface is coated its not going to oxidize (as quick)

[JustenGT8]

I cant see how this is possible?
The heat is being held in by the wrap, it gets there from the exhaust via the steel tubing.
Having the tubing coated doesnt mean the heat somehow "skips" it.

Stick a temp probe on a wrapped manifold and an unwrapped one then your eyes will be opened The manifold is constantly shedding heat, once wrapped it is no longer shedding heat....must go somewhere?

One benefit of wrapped pipes is improved spool, why would that be less shed heat and more energy kept in the exhaust gases....and of course the manifold itself is hotter.

plus as Brett says the oxidisation is worse.

[the_random_hero]

As for ceramic coating, can't recommend the guys at HPC in Brendale enough. I've gotten a buttload of work done there, it's all been done for a really good price and within a few days exactly as I've wanted it done.
Honestly, if you're coating the exhaust housing and manifold, I don't see the point in heat wrapping. If you need to protect anything, wrap it - not the manifold. I have seen professionally made manifolds/extractors literally crumble and fall apart within 6 months of being heatwrapped.

[MWP]

Stick a temp probe on a wrapped manifold and an unwrapped one then your eyes will be opened The manifold is constantly shedding heat, once wrapped it is no longer shedding heat....must go somewhere?
One benefit of wrapped pipes is improved spool, why would that be less shed heat and more energy kept in the exhaust gases....and of course the manifold itself is hotter.

Oh, yeah, of course i know this ^^^^^.

What i meant was that you said the ceramic coating protects the manifold against the higher temps caused by the wrap.
Which i read as you meant the ceramic coating helps keep the actual manifold metal cooler.

Anyway.... on with the topic