Header and Overpipe... - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Scooby South · 12-06-2012, 06:58 PM

Should they be Ceramic Coated and/or Wrapped????
Discuss please..

Bill

OrbitalEllipses · 12-06-2012, 06:59 PM

If you're min/maxing, why wouldn't you? Probably not as critical as on a turbo car.

FreshFRS · 12-06-2012, 07:01 PM

wrapped would be all you need. you could do both if you are really worried about it.

Scooby South · 12-06-2012, 07:07 PM

I think Ceramic/Wrapped would be good for the header to maximize efficiency and probably just Wrapped on the overpipe.. thats my 2 pesos..

BRZ? · 12-06-2012, 07:57 PM

I wrap the whole exhaust, from the engine to the tips. Why not?

FR-S Matt · 12-06-2012, 08:10 PM

Quote:

Originally Posted by BRZ?

I wrap the whole exhaust, from the engine to the tips. Why not?

A little excessive unless you have the extra money to throw at it. I'd most importantly want the headers coated or wrapped more than anything. You want that heat out of the engine bay. Like someone else said, furthest I'd go is probably the overpipe. Behind that, I don't think it matters too much unless someone can provide insight on why it would be valuable.

Dimman · 12-06-2012, 08:40 PM

Whatever you decide, a before and after dyno would be nice. Or temp readings or something.

Captain Insano · 12-06-2012, 08:43 PM

I've wrapped, coated, and coated/wrapped headers on past cars. I think obviously max heat proteciton is coat/wrap. I do think though on this car that EGTs probably won't be as high as a turbo car. With that in mind, it would be very nice if some of the header/exhaust vendors would have a coating option. If they did, that probably would be all I would do on the header/overpipe for this car. JMHO.

And I'm talking about real quality coating that makes a difference (like anything, there are good coatings and bad coatings out there). Something like swain inside and outside.

usptwins · 12-06-2012, 09:53 PM

http://www.jet-hot.com/

Check out Jethott coated... People use that to keep temps cooler and tends to make the parts last longer.. If im not mistaken.

Jesse@JDLAutodesign · 12-06-2012, 09:56 PM

Prefer coating to wrapping, especially on stainless parts.

maj75 · 12-06-2012, 10:09 PM

Since most of the systems for our cars are stainless, you probably won't see a lot of coating options. Besides the thermal advantage, coatings are usually used on cheaper mild steel headers so they last longer without rusting. Since the stainless headers don't rust like mild steel, coating is redundant for all but the most hard core applications.

Wrapping is death to mild steel headers, but fine on stainless. Not only does it keep heat out of the engine, it keeps the heat in the exhaust. Theoretically, that helps exhaust flow.

GTB/ZR-1 · 12-06-2012, 10:21 PM

Quote:

Originally Posted by Jesse@JDLAutodesign

Prefer coating to wrapping, especially on stainless parts.

Agreed...

I've had a set of Watson SS headers on my ZR the were Jet Hot Coated back in early '96--not a single issue & I'm certain it's helped w/ some of the heat radiation. My .02...

BRZ? · 12-07-2012, 12:03 PM

Quote:

Originally Posted by FR-S Matt

A little excessive unless you have the extra money to throw at it. I'd most importantly want the headers coated or wrapped more than anything. You want that heat out of the engine bay. Like someone else said, furthest I'd go is probably the overpipe. Behind that, I don't think it matters too much unless someone can provide insight on why it would be valuable.

Increases exhaust gas velocity, especially helpful in turbo vehicles

gmookher · 12-07-2012, 12:33 PM

I'm going FI via SC, and feel just fine with a uncoated header. One of my big reasons for SC is you dont have the same heat concerns you do witha turbo. I could see where om a turbo application, coating can be more important depending on placement etc

12-06-2012, 08:43 PM	#8
Captain Insano Senior Member Join Date: Sep 2012 Drives: 2014 Jeep Wrangler RubiconX Location: Midwest, USA Posts: 1,282 Thanks: 110 Thanked 292 Times in 224 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	I've wrapped, coated, and coated/wrapped headers on past cars. I think obviously max heat proteciton is coat/wrap. I do think though on this car that EGTs probably won't be as high as a turbo car. With that in mind, it would be very nice if some of the header/exhaust vendors would have a coating option. If they did, that probably would be all I would do on the header/overpipe for this car. JMHO. And I'm talking about real quality coating that makes a difference (like anything, there are good coatings and bad coatings out there). Something like swain inside and outside. Last edited by Captain Insano; 12-06-2012 at 10:11 PM.

12-06-2012, 09:53 PM	#9
usptwins Toyota Soul Join Date: Aug 2012 Drives: 96 taco Location: Louisiana Posts: 528 Thanks: 725 Thanked 99 Times in 78 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	http://www.jet-hot.com/ Check out Jethott coated... People use that to keep temps cooler and tends to make the parts last longer.. If im not mistaken. __________________ No replacement for Displacement??? Tell that to the people with a 2JZ.

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12-06-2012, 06:59 PM	#2
OrbitalEllipses Banned Join Date: Jan 2012 Drives: Attitude Location: MD Posts: 10,046 Thanks: 884 Thanked 4,890 Times in 2,903 Posts Mentioned: 123 Post(s) Tagged: 4 Thread(s)	If you're min/maxing, why wouldn't you? Probably not as critical as on a turbo car.

12-06-2012, 09:56 PM	#10
Jesse@JDLAutodesign Join Date: Aug 2012 Drives: 2013 Raven Black FRS Location: Phx AZ Posts: 601 Thanks: 56 Thanked 680 Times in 258 Posts Mentioned: 22 Post(s) Tagged: 3 Thread(s)	Prefer coating to wrapping, especially on stainless parts.

12-06-2012, 10:09 PM	#11
maj75 Senior Member Join Date: Nov 2012 Drives: Blue FRS 6sp, 95 M3 Location: South Florida Posts: 115 Thanks: 6 Thanked 43 Times in 25 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Since most of the systems for our cars are stainless, you probably won't see a lot of coating options. Besides the thermal advantage, coatings are usually used on cheaper mild steel headers so they last longer without rusting. Since the stainless headers don't rust like mild steel, coating is redundant for all but the most hard core applications. Wrapping is death to mild steel headers, but fine on stainless. Not only does it keep heat out of the engine, it keeps the heat in the exhaust. Theoretically, that helps exhaust flow.

12-07-2012, 12:33 PM	#14
gmookher Banned Join Date: Aug 2012 Drives: VortechSC,BorlaEL,Perrin,GCRace Location: HighHeatHighAltitudeAZ,USA Posts: 2,254 Thanks: 458 Thanked 669 Times in 394 Posts Mentioned: 9 Post(s) Tagged: 2 Thread(s)	I'm going FI via SC, and feel just fine with a uncoated header. One of my big reasons for SC is you dont have the same heat concerns you do witha turbo. I could see where om a turbo application, coating can be more important depending on placement etc

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