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Message started by BacktobasicsZM on 07/07/15 at 14:48:40

Title: how much header wrap
Post by BacktobasicsZM on 07/07/15 at 14:48:40

I am looking for suggestions with regards how much header wrap would be necessary to wrap the exhaust, from head to the back of the muffler?

Title: Re: how much header wrap
Post by verslagen1 on 07/07/15 at 14:56:08

rolls are sized in 2 feet shorter than you need or twice as much.
no in between.

Title: Re: how much header wrap
Post by justin_o_guy2 on 07/07/15 at 17:36:34

To the back of the muffler or back to the muffler?

Title: Re: how much header wrap
Post by BacktobasicsZM on 07/08/15 at 07:24:48

engine, to back of muffler at rear wheel. Full exhaust.

Title: Re: how much header wrap
Post by BacktobasicsZM on 07/08/15 at 07:25:20

2B382F2E313C3A38336C5D0 wrote:

rolls are sized in 2 feet shorter than you need or twice as much.
no in between.

So true, but hoping to avoid that....

Title: Re: how much header wrap
Post by Dave on 07/08/15 at 07:36:27

I have never wrapped a pipe....so I can't tell you from experience - but I can offer a calculated guess.

The OD of the pipe is 2". Multiply this by 3.14 to get the circumference....which is going to be 6.28 inches. Since you are going to be going at a bit of a diagonal....I would count on about 6.5 inches of length for each lap around the pipe.

I would also suspect that the overlap would be such that you would have a double layer everywhere.....a 2" wide band of tape would only progress 1" for each lap around. Based on this you would need 6.5 inches of length for every 1" of pipe length. (For different widths you will have to adjust this number). I supposed you can fudge this number a bit by spreading out the wrap so it does not have a full 2 layers everywhere.....but still overlaps a bit.

Title: Re: how much header wrap
Post by justin_o_guy2 on 07/08/15 at 08:31:00

you got a straight pipe? What about the hanger at the rear?
You planning on starting at the rear?

Title: Re: how much header wrap
Post by BacktobasicsZM on 07/08/15 at 13:23:17

I removed the stock muffler at the joint, and slid on a 1.75 Thrush glass pack. I am going to wrap the exhaust from the cylinder head all the way back.

Title: Re: how much header wrap
Post by BacktobasicsZM on 07/08/15 at 13:28:24

4C777A6D7C706B6D767E736C1F0 wrote:

Great perspective. I will measure the length and go from there.

Title: Re: how much header wrap
Post by verslagen1 on 07/08/15 at 14:00:52

Usually there are 2 sizes.
most here wrap just the header and it takes the shorter roll.
you'll probably need the longer roll

Title: Re: how much header wrap
Post by Boogie_with_Stu on 07/08/15 at 16:19:37

Dave is my hero!

You remember saying in 6th grade math " why do I have to learn this stupid stuff? I'll NEVER use it in the REAL world!"

;D

Title: Re: how much header wrap
Post by Rylee on 07/09/15 at 07:42:37

I used almost 20ft to wrap my exhaust setup. It's about 30" of total pipe wrapped. Best bet is to buy the longer roll having extra never hurt anyone. Coming up short will just make you mad and nobody wants to buy another 15' roll to splice in 2 feet of wrap!

For me I always start at the end of the exhaust and work back to the header. Just looks cleaner having whatever clamping system at the header than the end. And wet the wrap and when I say wet completely submerge it in water till it's soaked. It will smoke like hell until it dries out but it's way way easier to pull tight when wrapping the bends

Title: Re: how much header wrap
Post by zipidachimp on 07/09/15 at 13:35:33

pardon me for being a party-pooper, but there are 2 things about motorcycles that I have never understood: and this is going back at least 40 years:

1. what is the attraction of wrapped pipes?
2. why hardtails ?

Before I depart planet earth, can someone explain the attraction? All answers gratefully received! 8-)

Title: Re: how much header wrap
Post by justin_o_guy2 on 07/09/15 at 13:52:49

HA! I have both those answers. BUT, I'm not telling until someone explains women.

Title: Re: how much header wrap
Post by spearheadss on 07/09/15 at 13:59:38

Ah! Women are easy. At least that's been my experience. ;D

Title: Re: how much header wrap
Post by BacktobasicsZM on 07/10/15 at 08:17:30

1. Reasons in order of importance:

A: Appearance. I eliminated the stock muffler, and installed a small, red glasspack muffler. The paint on the bike is light blue. While I like the idea of the red muffler, but it clashes with the existing paint. Black wrap blends with black frame for appearance.
B: Children. Hoping to potentially avoid having one of my kids brush against the exhaust and burning themselves. Yes, they have been told, and explained, but a slight brush of a hot header will burn them. Maybe, just maybe, with the wrap they get spooked, but not a blister.
C. Much further down the list but keeping the exhaust gases hot keeps up velocity, and aids in cylinder scavenging.

Primarily A and B. C is for the wife, to aid in justification of the outflow of $$

Title: Re: how much header wrap
Post by Rylee on 07/10/15 at 08:39:09

I'll do my best to give "my" answers to both questions

1. Exhaust wrap
My savage exhaust literally passes just inside my calf from the header and inches below my leg while seated. Thus resulting in 2 perfectly placed burn holes in every pair of pants I own. Even with the wrap I still feel the heat on the underside of my thigh when stopped and my foot is on the ground

2.hard tails
For me it's a low and long style. Someone explained the rigid ride aspect in another thread. Once you ride one and fall in love with it's characteristics it's hard to go back. I've rode rigid for over a decade now and when purchasing a bike to build that's one of my deciding factors...will this look good hard tailed.

Those are my reasons I'm sure others can chime in

Title: Re: how much header wrap
Post by zipidachimp on 07/10/15 at 14:07:23

OK! being logic minded, safety aspect gets me. Hardtails will take a bit longer to get my head around! Thanks. 8-)

Title: Re: how much header wrap
Post by tom3949 on 07/12/15 at 09:13:45

I would buy about 5 metres. I didn't wrap my exhaust completely to the end but left about 6-7 inches. I thought I was overdoing it buying 5 metres but once you start wrapping it's surprising how much gets used up. I had a about a metre left with my bike and that should be sufficient for the final 6 inches or so.

I do need to qualify this though as my savage has been bobbed using a RYCA kit - so it doesn't have the standard exhaust. The bobber exhaust is shorter - so if anything you may possibly need more than 5 metres.

Title: Re: how much header wrap
Post by BacktobasicsZM on 07/13/15 at 07:18:37

http://www.metric-conversions.org/length/meters-to-feet.htm

16 feet....

Title: Re: how much header wrap
Post by BacktobasicsZM on 07/13/15 at 07:23:24

Alright, wrap is bought. 2 by 50 feet. Should be plenty.