wrapping headers

[Anonymous]

i was thinking about wrapping my header to help cool off the engine comp. i heard this can cause premature header failure. any thoughts also, in a related question, can i bolt up the starter and header before dropping in the motor? just trying to make it easy. the battery box and radiator are out of the way. thanks

 

[GrantD]

I can't comment on the bolting things up but the issue of header wrap was addressed recently and this is what Mike had to say about it.

Never use header wrap, it voids the warrantee (from Jet-Hot as well as most header manufacturers) because it holds moisture and promotes rust. Header wraps are not only "old school", their bad news.

I'd suggest getting the header ceramic coated it looks nice and does pretty much anything that wrapping it would do.

 

[Anonymous]

If its a 144-170 or 200 then you cant bolt on the starter before you drop the motor in...it actually bolts to the tranny. Dont know about a 250?

Header wrap is a personal preferance. It will VOID the warranty on any header wether its Classic Inlines, Clifford or Hooker.

Later,

Doug

 

[FalconSedanDelivery]

It will reduce temps , BUT as posted above it voids all Header Mfg's warrantys , and no you can not bolt in starter before hand , bolts to trans like the other 144-200 six's , just at the lower section just like the small block V-8s

 

[falcon fanatic]

As an alternative to header wrapping, consider making a heat shield out of aluminum and then covering one side of it with a sheet of some of that material that is used for header blankets and starter wraps. That'll at least keep you carb cool. You could also run a cold air duct to the area around your carb, or even make it into a ram air setup. These things will have an effect similar to wrapping your header.

 

[Anlushac11]

8)

Header wrap was very popular back in the 60's from wrapping fiberglass around Corvair turbos in the 60's to well into the 80's.

Keeping the exhaust heat in the header helped keep pressure up and reduced turbo lag. It also holds in moisture. Thermaltec used to sell header wrap and you had to mount it properly and apply a waterproof coating for it to work properly. Unfortunately as stated above it would void your warranty.

Modern technology has come to the rescue with thermal coatings such as Jet Hot. The thermal coatings work much better, last longer, dont void your warranty, and best of all they look really good.

 

[blueroo]

What about wrapping a stock exhaust manifold. Would it do anything?

 

[ludwig]

Modern technology has come to the rescue with thermal coatings such as Jet Hot.

I remember from years ago reading that heat dissipates most quickly from a matte finish black surface and least efficiently from a polished, or shiny chrome surface.
The silvered Jet Hot coating would seem to be taking advantage of this phenomenon of physics.

 

[Bort62]

Modern technology has come to the rescue with thermal coatings such as Jet Hot.

I remember from years ago reading that heat dissipates most quickly from a matte finish black surface and least efficiently from a polished, or shiny chrome surface.
The silvered Jet Hot coating would seem to be taking advantage of this phenomenon of physics.

That phenomenon is called radiative heat transfer.

http://en.wikipedia.org/wiki/Thermal_radiation for more information.

 

[wallaka]

What about wrapping a stock exhaust manifold. Would it do anything?

Probably not. Cast iron is great for keeping the heat where it belongs. Plus it would be a bear to wrap.