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Old 04-30-2007, 06:59 AM   #1
AWD>FWD
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Default How to wrap header?

I have this APS header and this header wrap.
Now I need them to come together.
Does anyone know where there is a write-up of how to wrap the header? I saw one here, but it only had to do with using the hi-temp spray to do it.
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Old 04-30-2007, 02:06 PM   #2
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Wet it with water, spiral wrap it with overlap, fasten it at both ends of the wrap, let it dry, spray it, done.
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Old 04-30-2007, 03:03 PM   #3
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Don't go crazy with the over lap though. Only do it as much as the product tells you. or about .5" to an inch.
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Old 04-30-2007, 03:08 PM   #4
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Originally Posted by Black-Falcon View Post
Don't go crazy with the over lap though. Only do it as much as the product tells you. or about .5" to an inch.
The overlap should be 1/2 the product width - it's a pretty basic concept, but I suppose there are some guys who might not figure this one out...
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Old 04-30-2007, 03:47 PM   #5
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Quote:
Originally Posted by flycaster View Post
The overlap should be 1/2 the product width - it's a pretty basic concept, but I suppose there are some guys who might not figure this one out...
you'd be surprised, FC... dei says 1/4" overlap, no more, no less, and irrespective of the wrap width:

http://static.summitracing.com/globa...dei-010101.pdf

fwiw, i overlapped more than 1/4"

ken
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Old 04-30-2007, 03:51 PM   #6
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fwiw, i overlapped more than 1/4"

ken
Me too
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Old 04-30-2007, 03:54 PM   #7
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APS + wrap = SOL when your expensive header cracks, as I don't think APS is replacing coated or wrapped headers that happen to crack.
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Old 04-30-2007, 04:35 PM   #8
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get it welded when it cracks.

Use 1" wrap, and take your time. 1/4" overlap, pull it tight.
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Old 04-30-2007, 05:55 PM   #9
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Quote:
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Use 1" wrap, and take your time. 1/4" overlap, pull it tight.
Common' guys. Think about this: if you use 1" wrap with a 1/4" overlap, you end up with 50% of the pipe with one layer, 50% with 2 layers. I don't care what the "directions" say, does that make any sense whatsoever to you? Do you think it's "good" for the pipe to be so unevenly heated???
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Old 04-30-2007, 07:27 PM   #10
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Originally Posted by flycaster View Post
Common' guys. Think about this: if you use 1" wrap with a 1/4" overlap, you end up with 50% of the pipe with one layer, 50% with 2 layers. I don't care what the "directions" say, does that make any sense whatsoever to you? Do you think it's "good" for the pipe to be so unevenly heated???
i agree that the suggested method leaves a lot to be desired.
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Old 04-30-2007, 09:01 PM   #11
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Can't explain it- it's just what the guys who make it say.
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Old 04-30-2007, 09:18 PM   #12
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^^I realize this, and I wasn't trying to jump you here. It's just that it makes no sense - reality and common sense are good tools to keep at the top of the box.
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Old 04-30-2007, 09:37 PM   #13
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Quote:
Originally Posted by jlp7t View Post
APS + wrap = SOL when your expensive header cracks, as I don't think APS is replacing coated or wrapped headers that happen to crack.
I have been hearing they crack UNLESS you wrap them.

It even says when you order the header "Wrapping or coating is strongly recommended".

Thanks for your input.
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Old 04-30-2007, 11:13 PM   #14
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Originally Posted by AWD>FWD View Post
It even says when you order the header "Wrapping or coating is strongly recommended".
You know, this is well worth a call or email to APS for absolute clarification before you write the check. IINM, they have denied warranty replacement for wrapping in the past....

If nothing else, it's peace of mind.
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Old 04-30-2007, 11:18 PM   #15
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^^I realize this, and I wasn't trying to jump you here. It's just that it makes no sense - reality and common sense are good tools to keep at the top of the box.
I would like to put in a small point --

Why would the wrap manufacturers recommend you use LESS if more overlap were beneficial? The more overlap there is, the more wrap they sell. They probably recommend that very small amount for a reason.

I have no idea why it would be better to have small overlap, but I would think it to be related to friction or moisture.

Just my .02...
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Old 04-30-2007, 11:52 PM   #16
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I would like to put in a small point --

Why would the wrap manufacturers recommend you use LESS if more overlap were beneficial?
I understand what you're saying, but I think the reason is cost. Look, this stuff is NOT cheap. At some price point, people won't buy it. If that $70/header suddenly becomes $140/header due to tighter wraps, what happens? Me? I think it's a business decision, not an engineering decision; friction is not at play here, and residual moisture is the same problem no matter how it is wrapped. (If you use these in a wet, humid environment and don't regularly get them hot and dried out, you'll have corrosion, period.)

Consider this: why do many racers, who really believe in doing everything they can to accelerate exhaust flow and thus Ve, use multiple layers of heat wrap, and even then seal the wraps with an extra wrap of thick aluminum foil? To them, cost is no issue and performance is everything.

Good, really thick heat wrap is pretty darned impressive. I use a turbo blanket that is about 4 layers thick and I can literally put my hand on the turbo hotside when it is on the dyno - it's hot, to be sure, but not "get me to the frigging hospital" hot like it would be otherwise. Try that with ceramic coating and it's "call 911" baby.
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Old 05-01-2007, 06:12 AM   #17
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So, when I wrap it do I need those metal zip tie dealies?
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Old 05-01-2007, 09:36 AM   #18
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the dei kits come with the zip ties. I've seen race fab shops use safety wire as well.
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Old 05-01-2007, 11:10 PM   #19
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I've gonna use pipe clamps.
How much water do I need? Will it be pretty obvious as soon as I start?
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Old 05-01-2007, 11:24 PM   #20
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I've gonna use pipe clamps.
I know that is tempting, but you need to use stainless steel to withstand the heat. They may hold..they may not.

As for water, just get a bowl and dump the roll in (loosen it up a little first) and cover it with water - let it sit there a minute or 2 and it'll soak and be much easier to roll onto the pipes.
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Old 05-02-2007, 01:27 AM   #21
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Might wanna wear gloves too...I was kinda itchy after doing it.
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Old 05-02-2007, 05:38 AM   #22
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We wore gloves and used pipe clamps.

I used the black Cool-It wrap, it looks very nice.
I have heard of others using pipe clamps with no problems.


All we needed to do is get a wet rag and wipe down the wrap as it came off the roll, very easy.
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Old 05-02-2007, 07:41 AM   #23
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when you guys say "pipe clamps," do you mean something like this?



if so, i don't think i've ever seen any that WEREN'T stainless...
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Old 05-02-2007, 08:48 AM   #24
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That's what I used.
I was under the impression they were stainless.

I work a lot on old POS cars/trucks using these and only the very, very old (installed in the 80's) rust.
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Old 05-02-2007, 09:18 AM   #25
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By the way, for anyone interested I only needed 1 roll for the header alone.
I used APS's heat shielding for the up-pipe and wrapped my Helix DP up to the cat with the beginning of the other roll.
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