Header wrap

[Skidude]

What do most folks use to keep the header wrap from unwrapping? I’m thinking a hose clamp. Any other suggestions?

 

[flattop1]

Safety wire .

 

[OVALTECH1]

the one piece sleeve type of insulation

 

[OVALTECH1]

i use both but I like the sleeve waaay better

 

[Chipg56]

What is the one in the middle?

 

[OVALTECH1]

that’s the rubber coated heat sleeve. It’s like the stuff on the right with high temp silicone over it

 

[Skidude]

I’m trying to wrap a weenie pipe that came with a brace welded on. I think I’ve got it figured out. I’m just going to use a hose clamp on the loose end.

 

[flattop1]

I’m trying to wrap a weenie pipe that came with a brace welded on. I think I’ve got it figured out. I’m just going to use a hose clamp on the loose end.

Soaking it in water helps it conform better when wrapping .

 

[OVALTECH1]

I didn’t think you were allowed to wrap the kids class clone pipes ?

 

[alvin l nunley]

Sound waves travel through air increasingly faster as the air temperature goes up. I've read it goes about 1 1/2 ft./s faster with a 1° increase in air temperature.
I read that in Gordon Jennings book.
Wrapping the header retains heat. The more heat it retains, the faster the sound waves travel. I'm wondering; do manufacturers test for the right length with or without wrapping? I'm wondering if it makes any significant difference.

 

[Skidude]

I didn’t think you were allowed to wrap the kids class clone pipes ?

If I read correctly, per tech, all pipes require wrap from the flange to the muffler. I may have read that wrong. I’ll go back and look again.

 

[Chipg56]

Sound waves yes, but does that mean that air (exhaust) moves faster? And of course when it is hotter it has a greater volume to move in relation to it's mass.

 

[Skidude]

The performance purpose of header wrap is to maintain the flow rate longer, allowing the gasses to travel further away from the exhaust port before they start to cool and become more dense.

That is not my purpose though. I just want to make sure I’m legal.

 

[Chipg56]

I always thought it was so you have less chance of burning yourself.

 

[Skidude]

I always thought it was so you have less chance of burning yourself.

That’s the reason it’s in the tech manual. That’s what I want to make sure I’m complying with.

 

[Skidude]

Here’s NKA. I read the wrap is required.