Header wrap question

[TENGRAM]

Non turbo application just get a good ceramic coating in them.

^^^fixed. That way you're keeping the heat out of the header tube walls.

[turbostang]

Wrapping exhaust is a bad idea unless it's absolutely necessary. If you've ever seen a set of headers after they've been wrapped for a few months, you'd know what I'm talking about.

Like everyone else, I won't fix headers that have been wrapped - they don't weld worth a shit and are nearly 100% gauranteed to crack again. Not only that, they surface-work-harden like a MOFO, a file won't hardly strike the tubing once they've been wrapped for a while.

Coatings work good for this application and REALLY cut down on under hood temps. If it's something near the exhaust that you're trying to protect, like a hose or wires etc.. a simple aluminum shield between the hot part and the part you're protecting will drop the temps 300*+

Also, interior coatings are a sales pitch in most cases - especially "jet hot" coatings. THey can only spray the coatings in the tubes as far as they reach with the spray. The smaller the tube, the shorter the spray can reach.

[Doug Hatton]

B&G will not warranty their turbo headers/crossover if it's been wrapped. They do accept the downpipe being wrapped as the guage of the material is a little heavier.

[fitzwell]

Hedman says that using header wrap voids their warranty because it causes the tubing to overheat which causes metal fatigue, at least that is what was on the instructions that came with the headers. It might be bullshit though.

Stevo

Not bullshit. Wraped the hedders on my 68 390, fucked up tubes in about 6 months.

[Cooter]

Matt will appreciate this...

I had a pair of 8.3 GAS turbo compressors OFFSHORE... IE, everything was ceramic blanketed, etc.

a fucking lean-burn engine with varying fuel BTU, and everything's blanketed.

those fuckers would burn the divider out of the manifold and turbine housing... I once measured the exhaust temp at 1300*F AT THE STACK! LOL

[Strychnine]

Matt will appreciate this...

I had a pair of 8.3 GAS turbo compressors OFFSHORE... IE, everything was ceramic blanketed, etc.

a fucking lean-burn engine with varying fuel BTU, and everything's blanketed.

those fuckers would burn the divider out of the manifold and turbine housing... I once measured the exhaust temp at 1300*F AT THE STACK! LOL

LMFAO. Fucking offshore guys... Turbine out EGT on that engine at 100% is 1350*F. Nice insulation!:shock:

I'm guessing that wasn't a wet manifold.

[KBScobravert]

Wrapping exhaust is a bad idea unless it's absolutely necessary. If you've ever seen a set of headers after they've been wrapped for a few months, you'd know what I'm talking about.

Like everyone else, I won't fix headers that have been wrapped - they don't weld worth a shit and are nearly 100% gauranteed to crack again. Not only that, they surface-work-harden like a MOFO, a file won't hardly strike the tubing once they've been wrapped for a while.

Coatings work good for this application and REALLY cut down on under hood temps. If it's something near the exhaust that you're trying to protect, like a hose or wires etc.. a simple aluminum shield between the hot part and the part you're protecting will drop the temps 300*+

Also, interior coatings are a sales pitch in most cases - especially "jet hot" coatings. THey can only spray the coatings in the tubes as far as they reach with the spray. The smaller the tube, the shorter the spray can reach.

Thanks for coming in Brooks. I didn't realize that the heat hardening would prevent them from being fixed.

What is your advice on the DP and a turbo blanket? What about the crossover and merge also?

I have a metric ton of the Thermo-tech heat sleeve coming for under my hood. I didn't completely think somethings through as far as I had thought. My fuel and coolant lines are Earls Pro-Lite 350 and all though it looks great with the black fittings it is also cloth. I have my fuel lines on going along the back firewall and I need to sheild the heat from the DP as much as I can. http://www.thermotec.com/products/18...t-sleeves.html

I still need to pull the hot side off one last time and get them coated. I would like to get a black ceramic. Do you have any advice on who can do a good coat?

[Cooter]

LMFAO. Fucking offshore guys... Turbine out EGT on that engine at 100% is 1350*F. Nice insulation!:shock:

I'm guessing that wasn't a wet manifold.

not a wet manifold... and the fuel mixture was all fucked up (obviously)

[SMEGMA STENCH]

So to summarize, don't use header wrap cause it ruins them. Get ceramic coated. And the heat going out the end of the header (instead of just soaking the engine bay) won't cause premature exhaust pipe failure. Sound about right?

[90GT50]

Google swain tech white lightning coating.