Page 1 of 1

Don't wrap coated headers

Posted: Wed Apr 22, 2009 2:42 pm
by manga_blue
Just a friendly warning. You can guess why I know this. :oops:

If you put heat wrap tape on ceramic coated headers it gets hot enough under the wraps to fry the coating off. Then you have to pay to get them re-coated. :twisted:

Now I'm looking for some other way to stop everything in the passenger footwell from cooking. ACL heat shield on the firewall perhaps?

Don't wrap coated headers

Posted: Wed Apr 22, 2009 7:03 pm
by NMX516
manga_blue wrote:Now I'm looking for some other way to stop everything in the passenger footwell from cooking. ACL heat shield on the firewall perhaps?


Worth a shot, the ACL stuff certainly does a good job of containing / shielding heat.

Don't wrap coated headers

Posted: Wed Apr 22, 2009 9:19 pm
by Jimmy
I've heard that heat tape is often misused and is wrapped around the part which is producing heat. Apparantly (i wouldn't actually know because i've never used the stuff) it's meant to be applied to objects which you want to keep cool. I think it was something to do with creating heat spots on the extractors. Is there any truth behind this logic :?:

Don't wrap coated headers

Posted: Wed Apr 22, 2009 11:27 pm
by orx626
NMX516 wrote:
manga_blue wrote:Now I'm looking for some other way to stop everything in the passenger footwell from cooking. ACL heat shield on the firewall perhaps?


Worth a shot, the ACL stuff certainly does a good job of containing / shielding heat.


I used an equivalent product on my 626 to protect the firewall and steering box from the turbo and dump pipe heat. I used 1mm thick aluminium as a strong back for it. Here are some piccies. It works a treat.

Cheers,
Danny

Image

Image

Image

Image

Image

Don't wrap coated headers

Posted: Wed Apr 22, 2009 11:32 pm
by Steampunk
Jimmy wrote:I've heard that heat tape is often misused and is wrapped around the part which is producing heat. Apparantly (i wouldn't actually know because i've never used the stuff) it's meant to be applied to objects which you want to keep cool. I think it was something to do with creating heat spots on the extractors. Is there any truth behind this logic :?:


Heat "wrap" usually refers to high-heat resistant material which you wrap around hot objects to contain heat, eg. header wrap, turbo beanie.
Heat "tape" usually refers to something that has a reflective side and a sticky side. This you wrap, or stick-on, things like air boxes, firewall, alternators to insulate the component and reflect heat away from it.

I'll let someone else explain the theory behind wrapping-up exhaust tubes.

Don't wrap coated headers

Posted: Thu Apr 23, 2009 3:13 pm
by manga_blue
orx626 wrote:I used an equivalent product on my 626 to protect the firewall and steering box from the turbo and dump pipe heat. I used 1mm thick aluminium as a strong back for it. Here are some piccies. It works a treat.

Cheers,
Danny

Thanks for that, Danny. After looking at those pics I can easily see how well it could form around the firewall and airbox problem areas on my car.
That's really nice looking work, so much so that I'm feeling like you might have set the bar a bit high for the rest of us. :)

Don't wrap coated headers

Posted: Thu Apr 23, 2009 3:52 pm
by 16bit
i got advice from an exhaust place to NOT wrap headers unless its a race car for some reason of having to replace the headers every few years or something. I am half way through building an air box out of the acl heat shield. its not too hard to work with at all. tin ships or even decent scissors as i used go through it pretty good.