| Author | Message | ||
     Jersey_thunder |
OK...i like the way it looks,what does it do? should i or shouldn't i? tony | ||
| Kccyclone |
Tony, it works like a heat shield, as far as if you should or shouldn't it's a personal preference. Mine are wrapped and I love the way it looks. Hope this helps. | ||
| Jersey_thunder |
do you have the silver or black wrap...pics? tony | ||
| Aaomy  |
hey tony i wrapped the header on my s2 with black exhaust wrap . the pros are the look. but dont think of it as insulation in the terms that the outside of the wrap wont be hot.. it will .. have third degree buns on my leg to prove its still hot enough to light your jeans on fire going down the road... the black wrap turns white with heat and time.. if you want can send you pick of my exhaust header with the black wrap,, aaron  whats that smell..... | ||
| Aaomy |
tony it will also trap moisture and damage your pipe. if you have a good looking pipe i wouldnt, go ceramic coating. one of my friend did. it looks great and he says you can put your hand on it almost after turning the bike off. if yours is damaged "witch i suspect it is, then who cares and wrap the pipe, personally i like the look of them wrapped just hate the thought of ruining a good pipe. PS sent you another e mail | ||
| Jersey_thunder |
that pic you sent me was WHITE!!! T | ||
| Aaomy |
look low on the pipe.. it all started out black .. then zebra striped,, cool as hell, then white, as it is in the pics.. and yes it was header wrap,, black from dhe i think,, ill check the box and list it later, it currently in the garage, and its cold!!!! | ||
| Blake |
"tony it will also trap moisture and damage your pipe. " I disagree. Of course mine stays hot enough to burn off any moisture on a consistent basis. I've also not had the wrap off the headers in three years now. | ||
| Kevyn  |
Theoretically, and someone will correct me if this is wrong or incomplete, the wrap will keep exhaust gas hotter inside the pipe. Hot gas--or gas maintained at at more consistent temperature point will flow faster than gas that is cooling...as soon as the exhaust gas leaves the combustion chamber and enters the header pipes, it's exposed to cooling air and the reasoning follows that it slows down as it makes its way to the collector and into the muffler for exit; slowing the flow of gases through the intake and exhaust cycles. The header wrap will---theoretically---maintain a more constant gas temperature inside the header tube, this allowing the gas to flow 'faster' and easing or in hopes, contributing to a more efficient flow of gas through the intake and exhaust cycle. Faster flowing gases, easier revving motor. Don't ask for the math, I'm not an engineer. I've used it on my '99 M2 and '98 S1W and suffered no ill effects. I 'sealed' it after application with appropriate high-temp exhaust paint by baking the headers in the oven. I think that was unnecessary. Just put the headers back on the bike and ride it. It's going to stink, real bad. After it 'cures' out the noxious chemicals, it's just fine. I never noticed a problem with moisture. It will get brittle and if you bump or scrape it, it will tear and need to be patched and resealed. It suited my needs just fine. I'm leaning more towards the ceramic coating for the S2. It is an S2T after all... | ||
| Bubabuell |
I believe heat damage/stress to the thin metal over extended periods is more damaging to the exhaust than the moisture would be. | ||
| Aaomy |
ok so maybe i should have worded it different. it wont damage your pipe as far a function, just cosmetic. more in the form of stains. and yes the heat of the motor will easily burn off all the moisture leaving staining deposits "you southern guys dont have to worry about road salt". yes some stain can be removed by boiling the header. but some must be polished out and some in pits must remain. it has no effect on the pipe except if you wish to remove the wrap and discover you dont like the current look of your pipe. yes i have also heard of heat fatigue and stress cracks occurring but have never experienced those. | ||
| Blake |
Oh yeah, stains are to be expected should you ever wish to remove the wrap and run a bare header again. I've heard of the supposed performance benefits, and I'm sure they do exist, but I doubt they are significant for a street bike. What I like about the wrap is that it significantly reduces the amount of heat coming off the headers. I used a 1" overlap when I wrapped my headers though, so they have a complete double layer of the stuff everywhere. If you follow the directions on the package, they tell you to use a 1/4" overlap which would leave much of the header with just a single layer of the wrap. It takes the majority of a 50' roll of 2" wide header wrap to cover the header down to the end of the collector. I think I had around 10' +/- a couple feet left both times I used the wrap. With the wrap, I can momentarily put my hand on the rear headpipe where it passes over the frame and would normally have the heat shield mounted, and get no burns to my bare hand. Without the wrap, doing so would leave leave skin on the pipe. The wrap besides being a good insulator also is a poor radiator. Win, win as far as heat shedding is concerned. The one major concern I had was that the increased temperature might induce excessive thermal stresses. I've had trouble making a race header survive either way, wrapped or unwrapped. The stock header that I run on the street has been fine for three years now including track days and rainy cross country biking/camping adventures. I like it. I did also try the Jet Hot coating. It did nothing to reduce heat. I did get the black coating though which would be a better radiator. The silver might make a difference. Third degree burns from having your jeans catch afire off a wrapped header? That is frightening. That header must have been glowing red hot! Once on a long ride I had put my feet on the back pegs for a change in position. That caused my right knee to come to rest against the rear headpipe and melt through my riding pants to my jeans on the bare header. I soon noticed a burning hot sensation on the inside of my knee. Thankfully no combustion. It did melt away a chunk of my water proof riding pants though. I've since repeated the same stupid move with the wrapped headers. The toll was greatly mitigated; only a bit of the hot glue that I used to adhere the patch to my riding pants melted. It left a dime-sized black stain on the wrap that is slowly dissipating. | ||
| Oddbawl  |
I was doing a bit of research on this myself, I hate the heat shield on my S1. Apparently it does have a positive effect on performance, the sources I found were referring to cars, they claimed a 2-3% hp increase for the reasons Kevyn mentioned. I'm sure the numbers are pretty negligable for two cyl bikes, but I'm sure it doesn't do harm in that respect. Are you guys wrapping both pipes? I was just gonna do the heat shielded side. I got 1" stuff what are you guys using? | ||
| Jersey_thunder |
i got the 1" myself haven't put it on yet. tony | ||
| Oddbawl |
Haven't put mine on yet either. As Blake said they recommend a 1/4" overlap, but I can't see that saving my leg if need be. Do you guys think going thicker will be ok? | ||
| Aaomy |
yeah third degree burns, depends on how long you ride on fire.. i used the two inch with only a 1/4" overlap single layered. the burn came about this way. got a phone call asking for a ride to walmart. she just wanted to ride the bike and ill take any excuse. im 6' 142 pounds with a 34" inseam. im also kinda a skater punk and wear baggy pants,, and yes they are always pulled up!! with some one on the back i get pushed slightly forward. on the way back noticed my leg getting hot,, then hotter, then slight pain. pulled my leg out and saw flames. the first thought was oh no gas tank and i flung my leg out to the side. witch of course fanned the flames. nice and hot now i turn quickly onto a side street and stop the bike. put both feet down and say hannah get off the bike. she dose but on the left side. so i ask her if she would walk around the bike and please put my leg out, i have an extremely high pain tolerance but it was starting to quiver. she got about half way around and said " your on fire" under statement of the year. she proceeded to stomp my leg out , then we continued home. cleaned and bandaged the wounds. ended up burned in the shape of a music note. took a several months to heal over. all the center tissue was burned past the nerve endings . the surrounding areas still had them though... and no the header wasnt red hot. just cheep thin jeans,normaly the dont light on fire, just weakens the fabric witch comes out in the wash. holes low on the ankles are from the s2, on the inside of the knee are from the 62. have several pairs nicely patched, now i wear heavy leather chaps all the time. | ||
| Blake |
Aaron on fire, Damn slim. Lots of riders would have panicked and dumped the bike. Good job remaining calm. Old dry cotton does light up pretty darn easily. Odd Aaron, I used a 1" overlap with the 2" wrap. It was tough to keep the wrinkles out, but not to tough. It should be easier to us a 1/2" overlap with 1" wrap. I wrapped mine dry, ignoring the suggestion to wet the wrap first. I just made darn sure it was wrapped tightly. It has worked out very well and I'd do the same again. | ||
| Oddbawl |
Cool. What did you use to tie it off? I don't have those fancy ties, I was going to use SS lock wire- 'bout time I used those fancy pliers... | ||
| Blake |
I used plain ole stainless steel worm drive hose clamps and safety wire. Given a choice, I'd go with the hose clamps over the wire. | ||
| Oddbawl |
Good ideer, I think I'll go slap it on today. | ||
| Nedwreck  |
That wrap is meant to be used on exhaust pipes in an enclosed space to keep the heat from migrating to other parts that might be heat sensitive. They're unnecessary in an exposed location. They don't hold up to UV rays well at all especially if they're kevlar. They are fire resistant, though. You'll need a pretty good thickness of it to keep the pipe from scorching your leg. I'm wondering what would happen to header pipes that are wrapped in one section and not in others. One would think there would be a big disparity in temperature between the wrapped section and the non-wrapped one. Add vibration and there's a good chance the pipe might fracture. I realize this stuff is all the rage amongst the chopper guys but is it worth doing to a proper, naked sportsbike? Bob | ||
| Vr1203  |
I used the wrap to keep the heat in the pipes until it got to my turbo. It was OK ,but I had it fray at the dragstrip. When I ran the bike,even when it was dry it always smelled like it had steam coming out of the wrap.I think its hard on the stainless steel. Look up some of my old postings for a few photos. Blake ,Jet Hot has different coats for different applications. My pipes are now coated ,blue, with the thick ,heat sealing stuff. It was alot more than your normal cosmetic job, I think about $500. After a run you can touch the pipes ,without getting burnt.If anyone wants some used rolls of exhaust wrap ,you can have them ($100+ new,good shape,I'm not kidding) ,for some beers.     Gotta be better than a super bowl party!!! | ||
| Djkaplan  |
"That wrap is meant to be used on exhaust pipes in an enclosed space to keep the heat from migrating to other parts that might be heat sensitive. They're unnecessary in an exposed location." This statement is only partially true. The wrap will keep heat down around the pipes, but its also used to keep heat in the exhaust gases as explained earlier. There are numerous examples of wrap being used on exposed header locations in racing applications. The reason for the wrap, in the simplest terms, is to keep as much energy (in the form of heat) in the system before it's lost. The result is a more efficient exhaust and better scavenging. What I totally disagree with is the aesthetic quality of it. It may be beautiful from an thermodynamic sense, but ugh, is it ugly! But if you like it, let your freak flags fly, brothers. | ||
| Rick_a  |
I have it on my ride. Looks nice, right leg doesn't roast as much, covers an oopsie, slightly improved performance...my only drawback is that an a bike ridden year 'round it usually only lasts me a year. | ||
| Rock |
Gentlemen, I received a quote from Jet-Hot to treat my X1 header with the nickel coating; the price came back as $120 less 10%; the price to ship the header back is $27 (the company is in Lou}isiana, I am in the Austin, TX area). Total cost to do this, then, would be just North of $150. What kind of experience(s) do y'all have with this company? The finished product (at least from the pictures) looks super! I would appreciate your comments. Thanx in advance.} | ||
| Jersey_thunder |
let your freak flags fly, brothers.<----LMAO you must know me!!! | ||
| Slaughter  |
I wrapped my pipes to keep from burning my right knee on the pipes - I was farcking up the leathers. The pipes were wrapped, looked really sporty but where they came together, I made the mistake of letting them rub - and they only lasted like 20 minutes before they rubbed completely through and started unwinding and flapping like flags. Don't let them rub against each other. My buddy did his 12 in black and it looks really good (stock headers) That stuff is expensive though! I'm a sometime engineer - and yeah, the lower density of the high temperature gasses can flow faster. Kinda like a chamber in a rifle at 50,000 psi will drive a bullet faster than 50,000 psi compressed air. Difference is mass of the gas (Poetry in engineering!) | ||
| Jersey_thunder |
YEA...WHAT HE SAID!!!... |
