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Old 10-05-2011, 11:16 AM   #1
Milehi OP
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Header wrap, good or bad ??

I am looking into keeping some heat off of my voltage regulator on my SE by wrapping the short section of exhaust that runs under that area. I have done this for decades on sportscars and hotrods, but get raised eyebrows when mentioned around bike people. How can an exhaust tube on a bike overheat by being wrapped when a mild steel V8 header primary tube, under a car hood, tolerates it just fine and lowers the underhood temp as well? Thanks.
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Old 10-05-2011, 11:19 AM   #2
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Quote:
Originally Posted by Milehi View Post
I am looking into keeping some heat off of my voltage regulator on my SE by wrapping the short section of exhaust that runs under that area. I have done this for decades on sportscars and hotrods, but get raised eyebrows when mentioned around bike people. How can an exhaust tube on a bike overheat by being wrapped when a mild steel V8 header primary tube, under a car hood, tolerates it just fine and lowers the underhood temp as well? Thanks.
There's no problem, it will just cause the pipe to corrode that's all.

Instead of wrap, can you consider some flashing instead?
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Old 10-05-2011, 11:21 AM   #3
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What I hear is that it gets wet and traps moisture, then your headers rust. Even Stainless can get corroded is subjected to a rough enough enviroment.
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Old 10-05-2011, 11:25 AM   #4
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Years ago I burned up a set of headers on a street car by wraping them , I'm sure the Ohio road salt helped a bit . But they only lasted maybe 6 months .
950 steel pipes can be cerramic coated to keep the heat down , can you just move the regulator a bit ?
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Old 10-05-2011, 12:40 PM   #5
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Voltage Reg

I've added a little self adhesive heat shield tape to the bottom of the bracket. I'm hoping that it dissapates the heat a little. It certainly can't hurt and it's cheap.

I know others have moved it completely.

Don't do the wrap, you'll corrode the pipes. Ceramic coating is a better option. Cools things a bit. Not so cheap.

If you really want to reduce overall exhaust temp, run an aftermarket exhaust and an H2W jet kit. Expensive.
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Old 10-05-2011, 02:20 PM   #6
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My 2 cents of experience,
I put header wrap on my "hot rod" years ago and my headers never rotted. Of course I never had to take the wrap off so don't know for sure but 10 years and the wrap never came off and the pipes never succumbed to rust.

Why? I painted them with header wrap paint. I really soaked them well. The wrap takes on a new character and appears to be water proof and becomes much more durable. Thus in my experience if you paint the wrap the headers are not hurt by moisture.
kj

* But this was in California so no road salt, except in the mountains. So if your roads are salted in winter all bets are off that your headers will survive.
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Old 10-05-2011, 02:29 PM   #7
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http://www.advrider.com/forums/showt...ader+pipe+wrap
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Old 10-05-2011, 06:05 PM   #8
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Ceramic coating wins on every level. Did it on my supermoto's and my 950 is next. Best when the pipes are new but good anytime.
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Old 10-05-2011, 07:40 PM   #9
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I'm not sure but keeping heat in rather than getting the heat out doesn't seem to be a good idea to me. Anytime you are increasing internal heat no matter where in the bike I wouldn't think this is going to help. Is there some thermo dynamic aspects of wrapping the headers I'm not aware of? I think it WOULD make sense inside of an engine compartment to keep the heat out of there, however in our bikes we already have a problem keeping them cool.

Thoughts?

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Old 10-05-2011, 09:47 PM   #10
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Originally Posted by bikepsych View Post
I'm not sure but keeping heat in rather than getting the heat out doesn't seem to be a good idea to me. Anytime you are increasing internal heat no matter where in the bike I wouldn't think this is going to help. Is there some thermo dynamic aspects of wrapping the headers I'm not aware of? I think it WOULD make sense inside of an engine compartment to keep the heat out of there, however in our bikes we already have a problem keeping them cool.

Thoughts?

B
Thermo-dynamically speaking, by insulating the headers, you gain more power (and efficiency) due to higher gas velocities through the pipes.
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Old 10-06-2011, 01:08 AM   #11
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Ceramic coating wins on every level. Did it on my supermoto's and my 950 is next. Best when the pipes are new but good anytime.
Just make sure it is real ceramic. Some companies basically just paint the exhaust. Cannot remember the name of the recommended company.
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Old 10-06-2011, 03:13 AM   #12
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i've used thermo-tec many years ago & found moisture stays between the wrap & pipe & will rust/corrode it away.

jethot coat is the way to go.
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Old 10-06-2011, 08:23 AM   #13
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Skip the wrap

You guys got me away from the wrap, thanks. I made a cool little heat shield under the r / r area. It is held in place by the two bolts in the bottom of the battery box. I contoured it to clear the spring nut and res. put some thermo tec mat on the bottom, gave it a swirl finish with the 3M pad- good to go. I thought this looked better than fitting one to the pipe. Still waiting for my v.reg. though, I may order another to keep on hand,
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Old 10-06-2011, 02:01 PM   #14
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Just make sure it is real ceramic. Some companies basically just paint the exhaust. Cannot remember the name of the recommended company.
Completely agree about real. I use Jet Hot for mine. Great service and product at least in my experience.
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