Exhaust/header wrap - How much will I need?

[Johnfm]

I am going to wrap the headers to reduce heat in the engine bay.

Any idea how much I will need to wrap the headers down to the Y-join?

My calcs (based on 1.5" header OD, coverage of 25mm per circumference of wrapping (including overlap) and header length of 800mm per pipe) comes to about 15m.

[msd1107]

Get them ceramic coated instead.

I think there has been some discussion on this site about ceramic coating. Enter "ceramic coating" in the search box.

David
1968 36/7988

[Johnfm]

Substantially more costly than wrap, which for a road car isn't really money well spent for me - I already have a lot to spend getting this car ship-shape!

Maybe next year.

[69S4]

It may not be over the long run if they're mild steel. I went through a phase of wrapping the manifolds and found that they eventually (4 - 5 yrs) disintegrated under the wrap - both times it was about six inches from the top that suffered most. A wrapped manifold on a motorcycle started showing the same symptoms but I unwrapped it in time. On the up side though it does reduce engine bay heat considerably.

[Johnfm]

Stu

By 4-5 years I will have replaced the headers - and probably will coat them with that ceramic stuff.

This is a 'short term' measure.