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SpeedRacer · Postby **SpeedRacer** » Tue Sep 30, 2008 9:14

Eric I'd say Ceramic coat it as well. Or you can be like me and backfire all day long :P

firestoned · Postby **firestoned** » Tue Sep 30, 2008 9:14

how are the 2 related?

SpeedRacer · Postby **SpeedRacer** » Tue Sep 30, 2008 9:14

If your exhaust mani is coated = cooler then your EGT's would be lower wouldn't they? If I'm wrong sorry i'm a newb on manifold information

firestoned · Postby **firestoned** » Tue Sep 30, 2008 9:14

i dont know either... but it makes sense..

Postby **RX-7 Chris** » Tue Sep 30, 2008 9:14

The EGT would not be lower. Having a ceramic coated mani would keep the exhaust heat out of the underside of the hood and move it out the exhaust. The ceramic coat does not make the heat go away, it only keeps it from leaving the pipe.

SpeedRacer · Postby **SpeedRacer** » Tue Sep 30, 2008 9:14

oh I knew that ^^ I was just testing you.

Postby **RX-7 Chris** » Tue Sep 30, 2008 9:14

Whatever josh

firestoned · Postby **firestoned** » Tue Sep 30, 2008 9:14

so does that mean that egt's are actuality HIGHER because the heat is going through the exhaust?

Postby **RX-7 Chris** » Tue Sep 30, 2008 9:14

I would think they should be, but it shouldn't make a huge difference. It might be something that would make an interesting before and after.

Rich · Postby **Rich** » Tue Sep 30, 2008 9:14

It's likely EGTs would go up, but it's much more of a concern to keep your under-the-hood temps down. I'd ceramic coat and do a header wrap, maybe get a shop to mock up a heat shield for it as well.

firestoned · Postby **firestoned** » Tue Sep 30, 2008 9:14

header wrap is NOT RECOMMENDED at all, especially on tubular manifolds, because the header wrap will hold moisture between the barriers, and can crack the manifold

MazdaTom · Postby **MazdaTom** » Tue Sep 30, 2008 9:14

Hotter exhaust gases flow faster. Hot = good (in terms of exhaust anyway).

Rich · Postby **Rich** » Tue Sep 30, 2008 9:14

firestoned wrote:header wrap is NOT RECOMMENDED at all, especially on tubular manifolds, because the header wrap will hold moisture between the barriers, and can crack the manifold

I wasn't aware of this. Seems like no moisture could survive with temps that high.

MazdaTom · Postby **MazdaTom** » Tue Sep 30, 2008 9:14

firestoned wrote:header wrap is NOT RECOMMENDED at all, especially on tubular manifolds, because the header wrap will hold moisture between the barriers, and can crack the manifold

blah blah blah. It all depends on the type of steel used. Mild steel - do not wrap. Stainless steel - OK to wrap. I wrapped the factory stainless header (yes, I said factory) on my Saturn. Not an issue. Before doing so, I was also aware of this phenomenon and after talking with a metalurgist, he asured me that as long as my header wasn't mild steel, I would be fine.

Wrapping ceramic coated mild steel....... I think it would be OK since the ceramic coating should isolate the steel from any moisture.

Wrapping ceramic coated stainless steel = probably overkill.

A heat sheild is a good idea. Especially if you're still using the top mount heat soaker- I mean interwarmer, I mean intercooler.

Colombia28 · Postby **Colombia28** » Tue Sep 30, 2008 9:14

MazdaTom wrote:A heat sheild is a good idea. Especially if you're still using the top mount heat soaker- I mean interwarmer, I mean intercooler.

sorry to stray off topic but this had me lol'ing hard! Nice one Tom!

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