zemmy
Parking Attendant
Posts: 13
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posted May 03, 2004 02:57 PM
exhaust wrap
Besides the drag racers, any one wrap their headers?
If so did you notice any difference?
And lastly can you wrap them while their on the bike?
  
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DKET
Expert Class
Posts: 189
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posted May 03, 2004 03:42 PM
header wrap
I wrap all my stuff . Everything from cars to boats and bikes . I even have my Kawasaki engine Snapper mower exhaust wrapped . On all engine types it cuts WAY down on the stagnant heat . Look at your bike and see how close the main tubes are to the radiator . I saw a Yosh on a 03 R1 that was touching the rad . The pipe sounded killer though I have to admit . The wrap makes the engine and oil cooler . Besides hot gas is a fast gas . It helps to scavenge the exhaust out of the cylinder .
I have wrapped stainless steel , regular uncoated steel , ceramic coated steel , and titanium . No failures from any material type . I have 12,000 miles on my full titanium Arata .
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vozizm
Needs a job
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posted May 03, 2004 04:26 PM
i thought you could not wrap a Ti pipe?...
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TurboBlew
Moderator
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posted May 03, 2004 04:26 PM
Dont wrap Ti pipes.
I experimented with some wrap on stainless. NEver really noticed a difference.
Id be more worried about intake temp than exhaust heat radiating.
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vozizm
Needs a job
Got Nothing Witty To Say
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posted May 03, 2004 04:34 PM
is it true Ti pipes turn to swiss cheese pretty quick when wrapped!?
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zemmy
Parking Attendant
Posts: 13
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posted May 03, 2004 05:06 PM
DKET, were you able to wrap them already on the bike or did you have take them off.
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motorcycleboy
Expert Class
Posts: 102
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posted May 03, 2004 07:42 PM
They're next to impossible to wrap on the bike (properly).
Never wrap Ti. It doesn't like it.
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DaveInDaytona
Pro
Posts: 1696
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posted May 03, 2004 07:42 PM
quote:
Besides the drag racers, any one wrap their headers?
If so did you notice any difference?
And lastly can you wrap them while their on the bike?
Yes, yes, and yes.
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DaytonaSportbikes Forum
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jonwright
Needs a job
Posts: 2416
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posted May 03, 2004 07:44 PM
Okay - so I've heard not to wrap Ti as well.
So...now that we've all heard it, anyone know exactly WHY?
What the hell happens?
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motorcycleboy
Expert Class
Posts: 102
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posted May 03, 2004 07:59 PM
quote:
Okay - so I've heard not to wrap Ti as well.
So...now that we've all heard it, anyone know exactly WHY?
What the hell happens?
The Ti superheats when wrapped. When it gets cooked and cooled over and over (as in a few weeks of riding) it fatigues and gets real brittle.
Its the expansion and contraction at the temps a wrapped pipe presents that it can't handle.
SS is a different story. No problem.
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zzzzzxxxxxr12
Expert Class
Posts: 214
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posted May 03, 2004 10:29 PM
Make sure you use good heat wrap, preferably with ceramic yarn. I used some normal glass tape and it let the surface of the tape get hot enough to bubble my lower cowl.
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Marcos Peguero
Zone Head
Posts: 568
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posted May 04, 2004 08:01 AM
I use it to lower the radiaton that gets to the radiator.
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zemmy
Parking Attendant
Posts: 13
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posted May 04, 2004 09:14 AM
What about an exhaust blanket??
Looks pretty interesting, it just covers one side of the exhaust.
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TurboBlew
Moderator
BUSY DOING THE SCHIAVO
Posts: 4590
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posted May 04, 2004 09:19 AM
Huh?????? Isnt that what the fan(s) are for?
quote:
I use it to lower the radiaton that gets to the radiator.
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Marcos Peguero
Zone Head
Posts: 568
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posted May 04, 2004 09:53 AM
Not all the time the the fans are on.
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TurboBlew
Moderator
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posted May 04, 2004 02:06 PM
That's why you wire a "switch" to turn them on at will.
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Marcos Peguero
Zone Head
Posts: 568
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posted May 04, 2004 03:27 PM
Putting switches to FI bikes is not a good idea. For those that are handicaped with electric stuff like me.
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ozzy
Needs a job
need guberment cheese
Posts: 3172
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posted May 05, 2004 06:14 AM
I wrapped the Yosh on my 12R with 2" wide header wrap tape.(worlds ugliest Muzzy was also wrapped and I had none of the fairing melt that has been reported with a Muzzy header) Both systems are stainless.
I used Thermotec wrap on the Muzzy and DEI wrap on the Yosh. Both products appeared to be the same stuff
I have no idea as to any performance gains, but I do know that my feet aren't burning up when Dino and Worm Hole are having toasted toes.
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TurboBlew
Moderator
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posted May 05, 2004 07:12 AM
Wiring a switch to turn the fans on is pretty elementary. Easier than taking the time to wrap a header (which BTW is a pain in the ass to do correctly)
Besides Y2K's heat blanket idea (insulates the frame) and installing a switch will cost 1/4 what a roll or header wrap and stainless clamps cost.
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Marcos Peguero
Zone Head
Posts: 568
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posted May 05, 2004 07:47 AM
You are rigth...
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted May 05, 2004 09:44 AM
 Edited By: Y2KZX12R on 6 May 2004 18:24
I also have a wrapped yosh ss pipe and havent had any trouble with pipe durability.
You cant wrap a pipe properly on the bike. You simply dont have access. Its hard enough to get it right when the pipe is on the bench. I use an .030" ss wire to band the wrap at the ends of the tube/insulation runs.
Your mid pipe will turn colors from the added heat that will get back there.
You will notice less heat coming from the engine vents.
As far as Titanium melting from exhaust temps from a gasoline engine?
Gasoline doesnt have enough heat to melt TI. Exhaust gas temps should not be above 1400 degrees F. If they are you are running dangerously lean.
The head (exhaust port) is aluminum. Granted its water cooled, but.
Just for reference heres the melting points of some common metals in degrees F.
Aluminum 1,220
Mild steel tube 2,500
Nickel 2,651
Chromium 2,939
Vanadium 3,110
Titanium 3,272
Molybdenum 4,748
So as you can see a chromed mild steel tube, which many exhaust pipes are made of, could never melt wraped or un wraped. And stainless steel being an alloy of some of these varrious metals would be even higher than plain carbon steel (mild tubing).
But all of these metals retain thier strength differently as they get hotter and hotter. It just so happens that TI retains 80% of its strength at 80% of its melting point. Not a bad quality to have in the wing structures of the SR-71. Its true that TI "work hardens" with every heat cycle. This is why it becomes brittle and can crack. And wrapping it will speed this up. A ti pipe can crack even if it isnt wrapped, and they will usually crack along the side of a weld.
I wouldnt wrap a TI pipe for these reasons. Besides Ti looks so nice why would you wrap it?
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Y2KZX12R
CompetitionCNC.com
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