It's refreshing to watch someone who gives absolutely no fucks about monetization and makes informative, well put together videos with scientific explanations to clarify everything. Cheers, mate.
I agree except one little thing , I'm from America. So to me this was the most unclear, clear and concise explanation I've heard so far too... lol jk jk great video man
There is a 4th reason to do exhaust wraps - thermal control. I have an air cooled dirt bike where the header pipe is very close to the cylinder body and the carb bowl. Instead of making heat shields, a good wrap helped cut down the radiant heat soaking the bowl - and maybe helped keep a little heat out of the cylinder itself. It also helps with keeping my right leg from roasting, so bonus!
Very good point. On one of my Harleys the exhaust is right near the oil tank. And it burns the shit out of my pants. But the main reason I want to wrap it is to keep more heat off of the other shit. For example the oil tank.
This is what i was wondering about as well. Let's say you have an air/oil cooled bandit with the headers straight in front of the block, would an exhaust wrap help cooling the block, since the moving air wouldn't be heated as much by the headers before hitting the cooling fans of the block?
At first I was like “What?” Then I was like “huh!” And at the end I was ready to teach a class on the mechanics of exhaust systems. Well done sir, well done.
Thank you for boosting my confidence, I feel more intelligent, of greater interest, my looks improved, my speech ability stronger and my dress sense sharper than before, thank you.
Wow just watch this as I am investigating wrapping my 1997 Kawasaki VN800 after converting to a bobber and wanted to understand the pro's and con's and watched other vids but yours was excellently presented easy to understand well done.
on my husq 510 i just did a double layer 25 cm long next to my leg. no change in performance but now i dont cook myself when im stopped at a traffic light... 3 years later and i havent had any problems
I was waiting to hear you mention something about tuning after a wrap, because i would think the engineers knew there was 10% exhaust gasses left and if you change that ratio by wrapping, wouldn't you need to re-jet or at least adjust air-fuel mix accordingly ?
This appears on my recommendations since weeks. Now that I opened it finally I hope youtube is being satisfied at last and stops recommending it to me.
The truth is it's most often done on street bikes to cover old corroded pipes. Before wrapping became fashionable the usual, and effective way to cover up old shit was barbeque black flat black paint. My reaction to fashionable mods supposedly done for performance is "dyno slips before and after or fuck off". You can measure everything an engine does. Wrap is quick and cheap. Having old pipes blasted then ceramic coated or spray metallized is not cheap for most owners. I've peeled enough of it off customer bikes to have no fondness for it, but if you are selling a motorcycle it can tidy things up.
Ho Lee fuck! Lol. I never seen these old videos. U were so lost and nervous compared to now. Are you wearing that same shirt today? Happy birthday, buddy. You've come a long way.
*Pro Tip:* Before wrapping your headers, scuff them up, prime them with high temp primer, then paint them with high temp paint. This will protect them from moisture/corrosion.
Very important: If you use exhaust wrap you should run the bike for a couple of minutes after washing it, because the wrap is soaked with water. In many cases this causes the rust on the pipes. I wrapped the pipes of my 1299 Panigale in 2016 and there are ZERO problems with it.
"I wrapped the pipes of my 1299 Panigale in 2016 and there are ZERO problems with it." - I'm pretty sure that because its a stainless exhaust, unless you have the sexy version and then the exhaust is titanium......
Always the best place to come for genuine practical info! What do you think about using this to reduce the average coolant temp on my R1? I’m conscious that the headers are really close to the radiator and it does run hot…. Failing that is it worth using it around the underseat exhaust pipes to cool me arse down?
Is the 90% based on actual measurements or calculations, or it’s just figurative, and could be 99% ? I feel that 10% exhaust remains is too much to ignore and that manufacturers would have addressed this major issue.
I had exhaust wrap on my 125, I painted the exhaust with VHT paint first and cured that, then I applied the wrap, after a very wet and horrible year I removed the wrap as it started to go white from heat and found my exhaust looked just as good as when I painted it. I think a lot of people forget to paint or protect the metal, as said the wrap will hold water when not running and so on.
Exactly. Also, never put the bike to sleep if the wrap is wet. (Caught in the rain on the way home) Let the bike idle and the exhaust wrap will be bone dry in no time.
My thunderheaders are ceramic coated but still required shields to keep from frying my right leg. After a few years I removed the shields and wrapped them. I prefer the look and reduction of labor when I don't have to fool around with the shields. To those that worry about corrosion just don't let the wrap stay wet on the pipes any longer than needed. They dry out quickly with minimal steam production once the engine is running. Been running wrap for years now. Glad to hear that it helped performance a small bit. Thanks for the clear explanation.
Is there any great risk to keeping the exhaust gases hotter for long as far as the engine goes? Are the cylinders likely to get hotter and could it potenially damage internal parts?
The only way to pull off all this overly scientific bullshit is with that smart sounding accent LOL!!! dude seriously all it does is reduce heat a slight bit and it looks cool that’s it!
Probably the best reason for exhaust wrap is keeping the engine compartment (cars) cooler... About the same as using a cast iron header.... As for motorcycles... for a turbo ..OK... otherwise it is a waste of money.
5:32 Did anyone else notice he said "MILES" per hour instead of "KILOMETERS" per hour? To be fair, we did adopt the Imperial System from the British, and refuse to change it to "METRIC" like most of the world. I was called a traitor by my Math teacher when I answered in kilometers instead of miles lol...
Great explanation. My MR2 currently has wrap and it's all falling off. Perhaps I just remove what's left, and have done with it. As a personal thing, I think exhaust wrap looks horrible. As I final note, I am getting up 70, and was a Rocker, Cafe Racer guy. I never ever saw anyone have exhaust wrap on their bikes. Maybe an American thing, I don't know, but not Cafe Racer.
I've got wrapped pipes on a 83 Kawasaki 700 LTD A1 Vulcan that came with after market Jardine Pipes.I din't do it for Looks or power.i did it to stop the damn thing from burning my F@#king leg.There are no Heat shields on the Jardines.didn't notice any power gain.
The ceramic coating would not be much cooler than no wrap or coating at all to the side of your leg. The "Glass Woven Roving" tape does give you time to react and save yourself from a burn. I like the way they look also. They come in colors so be creative.
One of the main reasons it was initially used was for power, but for cars, not bikes. If you wrap your exhaust you keep the heat in the gas flow as you've said, but importantly you keep it away from your engine bay. Increase in underbonnet temperatures will reduce power as the hot air is less dense, therefore to get stoichometric air/fuel ratio you have to add less fuel and so get less power. Colder air at the intake = denser air = more fuel needed to get to the correct air/fuel ratio and more power. Turbo/super charging works on the same principles, only to much greater effect as the change in density is much greater due to being mechanically forced, rather than driven by a simple temperature change. But in racing every 0.5 bhp counts! I know yours is a bike channel, but thought it was a worthwhile point to add a bit of history. Interesting video though.
I Could Care less About Power Or looks ---------- I Did Mine Because Of The Heat On My Leg ----------- What Surprised Me Was The Change Of The Sound From The Exhaust ---------- Very Noticeable ----------- Great Video Though Thanks
My headers without a doubt are dumping a lot of heat under the car hood and into the engine (454)compartment… naturally asperated, air induction from that heated air... so,,, intake air is higher temp?, would not fuel/air once aerosol via carburetor then be less dense, and less power?
People port and polish Heads all the time, some heads have inherent design with one or more cylinders a little 'off' for flow rates, mostly the extra milling is on the intake side, people put large collectors on the exhaust side to 'open flows'... having said that, it would be interesting to check exhaust temps (thus density/flow rate on exhausts at exhaust pipe ends. Usually two for cars(left bank/Right bank).By placing a strip of metal in the end pipe opening in the flow and using ir temp detector.Check exhaust pipe temp 'unwrapped at cylinder head for each cylinder and temp at end of pipe with exhaust pipe pipes wrapped. Perhaps using a corvette styled exhaust system for a car with side exhaust or modified other vehicle side exhaust.Another tool used might be a metal framed/constructed air flow rate device(cheap ones are made of plastic often used to balance Air condition flow rates at individual A/C vents.Testing @ idle, testing @ >< 2300 R.P.M? Cruise speed operation?Temp and exhaust flow rates before and after Wrap... maybe a pressure sensor at tail pipe ends also?True understanding has to have before after and end of tail pipe testing(side mounted exhausts might be easy to wrap a large or total amount of pipe).I suppose DYNO testing could short circuit the needs... but keeping heat from swelling up in the intake air should actually be the best advantage.... I cannot see less than 3+% gains... plus Keeping cooler the cab area/ A/c benefits and a Noise Db test before and after if 'wrapped' past the cab would be interesting.My understanding is the best wrap material isn't expected to last more than 4years, cannot be wettened over and over to enable 4 years(keeping in consideration any wrapping in once past collectors heading down stream) and that 'spray on to be applied to the wrapping is kind of iffy to lasting benefits, wet or dry areas.Anyway...…………. interesting subject that might return 5% power capacity of any engine in a car.
Ok this is probably a dumb question... small crack in exhaust, (crossover pipe on our engine actually) can’t afford to have repaired at the moment but need to do something because it’s pulling in air and causing the sensors to bug out and car is driving like shit... this stuff is cheap... will wrapping my crossover pipe, or at least enough of it to cover the section that’s got the folds where the crack is, will doing this keep it from drawing in air as a temp fix until we have the money to repair it properly........ yes a proper repair is 100% better... just looking for a temp solution to keep the exhaust system from drawing in excess air and bugging out the sensors... thanks folks
You're a cluey fella. Keep up the videos, perhaps one where you pull apart different 2stroke japanese power valves and explain each. I really enjoyed the Kx series.
Thank you for the informative video that isn’t filled with bullshit blah blah, theatrics and annoying music. There are people who look into RUclips for information and testing, or even instructions on how to use a product or want to know their experiences using it and the down sides. Sir, you have delivered, enough said....
Wow dude this is an amazing video. You are very very good at explaining this, thank you for sharing, I build Cafe Racers on my channel if that interests you
Wrapped my pipe to not melt any more winter clothing :). I think it looks good on the on my bike, scared to take it off and look under the wrap though ahah:p
I always thought wraps were just to prevent burns to the leg haha, I don't like the look of it but the paint on my pipes were damaged in the post and the seller took no responsibility so I am thinking of wrapping to cover it up.
I wonder if the protection is as good or better than shields. Does the wrap keep the heat in the pipe and feel cooler on the legs than the shield ?? Thank you for your generous consideration, Sincerely ........................
Question for those with more experience: Does wrapping your exhaust damage the metal due to the higher temperature? I'm afraid of wrapping the exhaust of my old bike since original parts are expensive.
What a great video pal. Thanks. I'll get wrapping :D....A potential 10% increase in efficiency for only 15 squid of wrap sound good to me. I've a 96 1100 Virago. I'm sure you know it's only got 2x 500+CC cylinders and they're prone to back firing because of a fuel dump into the exhaust. Wondering now if the wrap will actually make it worse....hmmmmm. Thoughts? :D
Er ......... I really expected you to rip the piss out of it. But no, explained the science, did the pros and cons, and left it up to the rider to decide. For me, Harley heat shields are fucking junk tinplate, and ive already burnt myself, so thanks for the info.
What about keeping the air n the engine bay cooler? If you have a cold air intake it will perform better with a cooler engine bay. That’s definitely a plus. Cooler air coming through the intake manifold means better performance
Here in Vegas it never rains so maybe nice here. I could see how on the coast with high humidity and frequent moisture that it could ruin pipes over time. Long live the Vegas riders!
My R1 is wrapped. Also heat paint coated from the spray can over the wrap. It needs recoated every 2-3-4 years with the paint, but it has proven to me to “seal” it. Now mind you after application of the paint, run it OUTSIDE to burn the fumes off and it’s gold. Done it. Still do…
Look. We wrap pipes because they look good. If anyone out there thinks there bike will be faster, your a complete idiot. Back in the day it was called splitting hairs! You will NEVER EVER feel any difference. If you want seat of the pants power. SPEND SOME MONEY!!!!! I have a 98 113 s&s. That I wrapped . I'm still riding it today, its had one rebuild. Same heat tape from day one. Pipes are still structurally sound. Just take care of your shit. Heat tape is strictly cosmetic on harleys
I just wrapped mine ‘ Mrs asked what is that for , I said 3 reasons , extra power , looks good , and protect from getting burnt 👍 and yea my bobber now looks cool wrapped
I have a Triumph GT sprint which puts out a lot of heat from behind the fairings. I wonder if the heat wraps would nullify some of the heat to make it worth it?
The benefits of exhaust wrap are really minuscule. The negative aspects of exhaust wrap are major. The exhaust wrap retains moisture and causes corrosion and failure of the pipes. Plus the cosmetic factor. Exhaust wrap looks absolutely like shit and gets worse and worse with time. I have my Trask turbo system pipes ceramic coated as well as on my '74 FXE. Ceramic is far far better than any crappy looking exhaust wrap.
It sounds weird AF, but i have seen a Subaru burst into flames on the dyno because of the wrapping. The thing developed a moderate cooling leak because of to high temps on the dyno. The coolant hit the wrapping and it literally burst into strange but huge blue flames with incredible heat and smoke. I have never seen something so close to water burn!!!! I still dont fully understand what happened but the only thing i can think of is that the water in the coolant somehow split into hydrogen/oxygen and combusted. I cant imagine EGT to be so high that this can even happen without the motor/turbo dying! Ever since that day i turned "allergic" to Exhaust wraps and turbo blankets.
i did it for none of those reasons. idk if my method was smart but the theory was, engine would get really hot (too hot), the exhaust pipe ran in front of the engine, so when driving the hot gasses coming off the exhaust would come back at the engine. so i installed the best radiator the bike could get and wrapped the exhaust to eliminated the heat coming back at the engine. and well, it worked for me. bike doesnt overheat anymore (fj 1200 '89)
Um.....this is the problem w/ keeping the exhaust hot so that a pressure pulse can move faster. As gasses cool they contract. I would think it would be beneficial to extract as much heat from the exhaust as possible and as quickly as possible. But my physics professor used to say that he'd heard enough from the peanut gallery for one day.
I know i'm a bit late, but I can't help but think that doing both would be more talked about more? I'm sure a ceramic coating does a great job, but surely a coating with a wrap would be that much better, and the coating would stop any trapped water from fucking the exhaust?
All that explanation.... and the wrap has virtually no effect. It is all looks, and copycat. It looks as ridiculous as a giant metal wing on the back of a Toyota Corolla.
I'm planning to wrap my xmax 300 scooter cause the exhaust pipe produce so much heat that it could warm up my bottle water in it, does it have any bad effect?
I think if your not going for the wrapped look and your not getting burnt or slowly cooked by your exhaust don't do it. Its shit for corrosion and you will not see any significant hp. Coatings are way better but expensive. your better off making a guard if you can than using this shit.
I thought it was to keep the wrong things from heating up. A la firewall of passenger compartment in a transverse set-up where header faces compartment.
Would it not also aid with cooling and power by allowing more cold air into the combustion chamber? I dunno shit about engineering though so would love to know if or why I'm wrong
the best reason is all 3, i dont have a heat shield on my exhaust, its ugly already so it will look better and if i gain a bit of scavenging even better. also i live in the south of Portugal, hardly any rain and i definitely don't ride in it and no salt on the roads so no real downside
Awesome explanation man been trying to find something like this for months. I'm thinking of doing a wrap on my Harley purely for looks, I'm slowly going from stock to chopper type build. My main concern is the effects on the carburetor, I've heard the increased exhaust speed can cause the bike to run lean. But from your video it seems like there won't be much change. Since you seem to know a lot on the topic, I'd appreciate your opinion on exhaust wrap creating a need for carb adjustments once installed. Thanks!
Changing exhausts totally can have (and usually does) an effect on the engine running lean. For exhaust wrap I wouldn't worry at all. In the video I talk about the physical difference exhaust warp CAN make, but I'm saying that loosely. Thanks for the comment dude and I hope that answers your question. - matt
Another good reason for exhaust wraps in this day and age is that the catalytic converter is more efficient at higher temperatures, so you want the exhaust gases delivered to the cat to be maintained to (as far as I remember) about 375 degrees C.
It's refreshing to watch someone who gives absolutely no fucks about monetization and makes informative, well put together videos with scientific explanations to clarify everything. Cheers, mate.
Revhead dOnT fOrGeT tO LiKe, CoMmEnT aNd SuBsCrIbE
Revhead except he forgot about the main pro for wraps.. reducing under hood heat.
5abivt my guess would be because of the channel’s focus on motorcycles they glossed over that
haha Right? He's drawing diagrams and I'm paying more attention than i did in my marriage counseling.
dang, that was the most clear and concise explanation I've heard. excellent job sir!
No worries mate thanks for the comment - matt
I agree except one little thing , I'm from America. So to me this was the most unclear, clear and concise explanation I've heard so far too...
lol jk jk great video man
because it covers a multitude of sins and rust
Wrapped mine for looks. Never knew there was any other benefit. Loved the scientific explanation.
Clear, concise, informative and without the extra bullshit nobody ever asks for. Great vid
Reason most people wrap... Dented pipes! 😂🔰
There is a 4th reason to do exhaust wraps - thermal control. I have an air cooled dirt bike where the header pipe is very close to the cylinder body and the carb bowl. Instead of making heat shields, a good wrap helped cut down the radiant heat soaking the bowl - and maybe helped keep a little heat out of the cylinder itself. It also helps with keeping my right leg from roasting, so bonus!
Very good point. On one of my Harleys the exhaust is right near the oil tank. And it burns the shit out of my pants. But the main reason I want to wrap it is to keep more heat off of the other shit. For example the oil tank.
This is what i was wondering about as well. Let's say you have an air/oil cooled bandit with the headers straight in front of the block, would an exhaust wrap help cooling the block, since the moving air wouldn't be heated as much by the headers before hitting the cooling fans of the block?
At first I was like “What?” Then I was like “huh!” And at the end I was ready to teach a class on the mechanics of exhaust systems. Well done sir, well done.
My dad bought me that exact shirt back when i was in the 5th grade.
What ? You sayin he nicked it off you? Or did you give it to him?
Either he was terrible at picking sizes or you were a real porker
Droptuned 83 he is implying this grown man is wearing kiddie type shirt 🤣🤣
You still have it? I would like to buy it.
@@Group_Anonymous 20 quid and its yours
omg you literally replied to every question in the comment.
you are a good man
yeah but not this one lol
@@dirtygarageguy 🤣🤣🤣
Thank you for boosting my confidence, I feel more intelligent, of greater interest, my looks improved, my speech ability stronger and my dress sense sharper than before, thank you.
And here's me just thinking its to cover Rust and Holes up
It's also good for closing the gap between the pipe & your exhaust mounts. No rattles, no loosening nuts, etc.
I am mechanic who fitted the exhaust wrap for customer bikes, now I can explain the reason.
Thank you
Wow just watch this as I am investigating wrapping my 1997 Kawasaki VN800 after converting to a bobber and wanted to understand the pro's and con's and watched other vids but yours was excellently presented easy to understand well done.
Doing exactly the same to my 98 right now. Complete rebuild from frame out, and I'm planning to wrap.
on my husq 510 i just did a double layer 25 cm long next to my leg. no change in performance but now i dont cook myself when im stopped at a traffic light... 3 years later and i havent had any problems
Vastiano Cara the power differences are so small you don't notice them. You can probably just notice them on a dyno
i dont know, never had it on a dyno. but anyway as you said difference too small to notice, apart from my leg :)
haha yeah :d dont get yourself burned! :D
I was waiting to hear you mention something about tuning after a wrap, because i would think the engineers knew there was 10% exhaust gasses left and if you change that ratio by wrapping, wouldn't you need to re-jet or at least adjust air-fuel mix accordingly ?
No, because it makes such a small difference that it might as well not exist
This appears on my recommendations since weeks. Now that I opened it finally I hope youtube is being satisfied at last and stops recommending it to me.
The truth is it's most often done on street bikes to cover old corroded pipes. Before wrapping became fashionable the usual, and effective way to cover up old shit was barbeque black flat black paint. My reaction to fashionable mods supposedly done for performance is "dyno slips before and after or fuck off". You can measure everything an engine does.
Wrap is quick and cheap. Having old pipes blasted then ceramic coated or spray metallized is not cheap for most owners.
I've peeled enough of it off customer bikes to have no fondness for it, but if you are selling a motorcycle it can tidy things up.
Ho Lee fuck! Lol. I never seen these old videos. U were so lost and nervous compared to now. Are you wearing that same shirt today? Happy birthday, buddy. You've come a long way.
would this make your bike warm up faster, I don't like to ride my 2 strokes without them properly warm and reducing this time would be good thx
Yes it would but nothing like 50% faster - but yes it would
Yeah my exhaust is burning the hell out of my legg
One too many burned marks on my right leg from the vrod was my motivation ...
Wrapped today my RoyalEnfield look awesome
send me some pictures, they'll go in a video
Seriously
*Pro Tip:* Before wrapping your headers, scuff them up, prime them with high temp primer, then paint them with high temp paint. This will protect them from moisture/corrosion.
I just had mine ceramic coated first
Great video, i'm gonna mummify my exhaust it looks badass!
great video matt! well said.
Thanks - matt
Skottie delago does anyone know if you can wrap it with a heat shield on ?
Very important: If you use exhaust wrap you should run the bike for a couple of minutes after washing it, because the wrap is soaked with water. In many cases this causes the rust on the pipes. I wrapped the pipes of my 1299 Panigale in 2016 and there are ZERO problems with it.
"I wrapped the pipes of my 1299 Panigale in 2016 and there are ZERO problems with it."
- I'm pretty sure that because its a stainless exhaust, unless you have the sexy version and then the exhaust is titanium......
@@dirtygarageguy yes it's Stainless steel.
Always the best place to come for genuine practical info! What do you think about using this to reduce the average coolant temp on my R1? I’m conscious that the headers are really close to the radiator and it does run hot…. Failing that is it worth using it around the underseat exhaust pipes to cool me arse down?
You need a doule skinned heat shield with an air flow between the two.
I swear my wr250r sounds better, less clicky clanky, with exhaust wrap. could this acoustic insulation be a contributor to hp.
"could this acoustic insulation be a contributor to hp."
- no.
Great for remote turbo setups on cars, keep that gas hot and spools faster, same with turbo blankets.
Is the 90% based on actual measurements or calculations, or it’s just figurative, and could be 99% ?
I feel that 10% exhaust remains is too much to ignore and that manufacturers would have addressed this major issue.
90% of what? Sorry this was a video I did years ago, jog my memory
I had exhaust wrap on my 125, I painted the exhaust with VHT paint first and cured that, then I applied the wrap, after a very wet and horrible year I removed the wrap as it started to go white from heat and found my exhaust looked just as good as when I painted it. I think a lot of people forget to paint or protect the metal, as said the wrap will hold water when not running and so on.
Exactly. Also, never put the bike to sleep if the wrap is wet. (Caught in the rain on the way home) Let the bike idle and the exhaust wrap will be bone dry in no time.
My thunderheaders are ceramic coated but still required shields to keep from frying my right leg. After a few years I removed the shields and wrapped them. I prefer the look and reduction of labor when I don't have to fool around with the shields.
To those that worry about corrosion just don't let the wrap stay wet on the pipes any longer than needed. They dry out quickly with minimal steam production once the engine is running. Been running wrap for years now. Glad to hear that it helped performance a small bit. Thanks for the clear explanation.
Is there any great risk to keeping the exhaust gases hotter for long as far as the engine goes? Are the cylinders likely to get hotter and could it potenially damage internal parts?
No, dimple because the engine is generally overcooled by design.
Would wrapping my pipes prevent from burning my leg again? My calf tends to lean on the exhaust pipe while riding.
Yes, well at least reduce it
The only way to pull off all this overly scientific bullshit is with that smart sounding accent LOL!!! dude seriously all it does is reduce heat a slight bit and it looks cool that’s it!
Do you know how to read? And does your hearing work?
This was super helpful, thanks pal.
3 main reasons: Looks, Looks, Looks.
exhaust wraps are supposed to be coated with a silicone spray after installed so they do not absorb water
That would stink to high hell as it burns off.
1-Shot slinger it's a high temp silicone that won't burn off but seals the wrap so it doesn't absorb water and deteriorate
What is the brand name of the stuff ?
1-Shot slinger DEI Hi-Temp Silicone Coating
Thanks I'll try to get some.
Most comprehensive review of exhaust wrap
Probably the best reason for exhaust wrap is keeping the engine compartment (cars) cooler... About the same as using a cast iron header.... As for motorcycles... for a turbo ..OK... otherwise it is a waste of money.
I wonder if having the exhaust wrapped would mean I don't have to worry about putting the cover on my bike too soon after parking it
5:32 Did anyone else notice he said "MILES" per hour instead of "KILOMETERS" per hour? To be fair, we did adopt the Imperial System from the British, and refuse to change it to "METRIC" like most of the world. I was called a traitor by my Math teacher when I answered in kilometers instead of miles lol...
In the UK we use mph - don't ask why LOL
Great explanation. My MR2 currently has wrap and it's all falling off. Perhaps I just remove what's left, and have done with it. As a personal thing, I think exhaust wrap looks horrible. As I final note, I am getting up 70, and was a Rocker, Cafe Racer guy. I never ever saw anyone have exhaust wrap on their bikes. Maybe an American thing, I don't know, but not Cafe Racer.
I've got wrapped pipes on a 83 Kawasaki 700 LTD A1 Vulcan that came with after market Jardine Pipes.I din't do it for Looks or power.i did it to stop the damn thing from burning my F@#king leg.There are no Heat shields on the Jardines.didn't notice any power gain.
The ceramic coating would not be much cooler than no wrap or coating at all to the side of your leg. The "Glass Woven Roving" tape does give you time to react and save yourself from a burn. I like the way they look also. They come in colors so be creative.
One of the main reasons it was initially used was for power, but for cars, not bikes. If you wrap your exhaust you keep the heat in the gas flow as you've said, but importantly you keep it away from your engine bay. Increase in underbonnet temperatures will reduce power as the hot air is less dense, therefore to get stoichometric air/fuel ratio you have to add less fuel and so get less power. Colder air at the intake = denser air = more fuel needed to get to the correct air/fuel ratio and more power. Turbo/super charging works on the same principles, only to much greater effect as the change in density is much greater due to being mechanically forced, rather than driven by a simple temperature change. But in racing every 0.5 bhp counts! I know yours is a bike channel, but thought it was a worthwhile point to add a bit of history. Interesting video though.
I Could Care less About Power Or looks ---------- I Did Mine Because Of The Heat On My Leg ----------- What Surprised Me Was The Change Of The Sound From The Exhaust ---------- Very Noticeable ----------- Great Video Though Thanks
My headers without a doubt are dumping a lot of heat under the car hood and into the engine (454)compartment… naturally asperated, air induction from that heated air... so,,, intake air is higher temp?, would not fuel/air once aerosol via carburetor then be less dense, and less power?
Yes - the hotter the air the lower the density
People port and polish Heads all the time, some heads have inherent design with one or more cylinders a little 'off' for flow rates, mostly the extra milling is on the intake side, people put large collectors on the exhaust side to 'open flows'... having said that, it would be interesting to check exhaust temps (thus density/flow rate on exhausts at exhaust pipe ends. Usually two for cars(left bank/Right bank).By placing a strip of metal in the end pipe opening in the flow and using ir temp detector.Check exhaust pipe temp 'unwrapped at cylinder head for each cylinder and temp at end of pipe with exhaust pipe pipes wrapped. Perhaps using a corvette styled exhaust system for a car with side exhaust or modified other vehicle side exhaust.Another tool used might be a metal framed/constructed air flow rate device(cheap ones are made of plastic often used to balance Air condition flow rates at individual A/C vents.Testing @ idle, testing @ >< 2300 R.P.M? Cruise speed operation?Temp and exhaust flow rates before and after Wrap... maybe a pressure sensor at tail pipe ends also?True understanding has to have before after and end of tail pipe testing(side mounted exhausts might be easy to wrap a large or total amount of pipe).I suppose DYNO testing could short circuit the needs... but keeping heat from swelling up in the intake air should actually be the best advantage.... I cannot see less than 3+% gains... plus Keeping cooler the cab area/ A/c benefits and a Noise Db test before and after if 'wrapped' past the cab would be interesting.My understanding is the best wrap material isn't expected to last more than 4years, cannot be wettened over and over to enable 4 years(keeping in consideration any wrapping in once past collectors heading down stream) and that 'spray on to be applied to the wrapping is kind of iffy to lasting benefits, wet or dry areas.Anyway...…………. interesting subject that might return 5% power capacity of any engine in a car.
well cant they make a better looking wrap then like a mummy ,haha
Ok this is probably a dumb question... small crack in exhaust, (crossover pipe on our engine actually) can’t afford to have repaired at the moment but need to do something because it’s pulling in air and causing the sensors to bug out and car is driving like shit... this stuff is cheap... will wrapping my crossover pipe, or at least enough of it to cover the section that’s got the folds where the crack is, will doing this keep it from drawing in air as a temp fix until we have the money to repair it properly........ yes a proper repair is 100% better... just looking for a temp solution to keep the exhaust system from drawing in excess air and bugging out the sensors... thanks folks
You're a cluey fella. Keep up the videos, perhaps one where you pull apart different 2stroke japanese power valves and explain each. I really enjoyed the Kx series.
If done right good
If done bad moisture rots exhaust unless stainless pipes
But I'd replace wrap yearly.
Thank you for the informative video that isn’t filled with bullshit blah blah, theatrics and annoying music.
There are people who look into RUclips for information and testing, or even instructions on how to use a product or want to know their experiences using it and the down sides.
Sir, you have delivered, enough said....
just like tig finger :D
Wow dude this is an amazing video. You are very very good at explaining this, thank you for sharing, I build Cafe Racers on my channel if that interests you
Best explanation so far.. scientific, but simple as well.. now, I don’t hesitate to wrap my motorcycle exhaust.. Thanks, Man...👍🏼👍🏼
Makes a pipe look like and old woman's leg.imho Ho ho
wrap causes nO damage
Wrapped my pipe to not melt any more winter clothing :). I think it looks good on the on my bike, scared to take it off and look under the wrap though ahah:p
For those who want the negatives -- loose fibers will stick to your shirt when working on the bikes . That's it.
I just think it looks cool
Very Very well said
thanks for the comment dude - matt
I always thought wraps were just to prevent burns to the leg haha, I don't like the look of it but the paint on my pipes were damaged in the post and the seller took no responsibility so I am thinking of wrapping to cover it up.
I wonder if the protection is as good or better than shields. Does the wrap keep the heat in the pipe and feel cooler on the legs than the shield ??
Thank you for your generous consideration,
Sincerely ........................
Question for those with more experience:
Does wrapping your exhaust damage the metal due to the higher temperature? I'm afraid of wrapping the exhaust of my old bike since original parts are expensive.
insulate, keeps heat in helps evac cylinder more power, GOOD THING LOOKS COOL. N
What a great video pal. Thanks. I'll get wrapping :D....A potential 10% increase in efficiency for only 15 squid of wrap sound good to me.
I've a 96 1100 Virago. I'm sure you know it's only got 2x 500+CC cylinders and they're prone to back firing because of a fuel dump into the exhaust. Wondering now if the wrap will actually make it worse....hmmmmm. Thoughts? :D
Excellent explanation thank you sir.
Er ......... I really expected you to rip the piss out of it. But no, explained the science, did the pros and cons, and left it up to the rider to decide.
For me, Harley heat shields are fucking junk tinplate, and ive already burnt myself, so thanks for the info.
What about keeping the air n the engine bay cooler? If you have a cold air intake it will perform better with a cooler engine bay. That’s definitely a plus. Cooler air coming through the intake manifold means better performance
Here in Vegas it never rains so maybe nice here. I could see how on the coast with high humidity and frequent moisture that it could ruin pipes over time. Long live the Vegas riders!
does it make the exhaust quieter?
No
My R1 is wrapped. Also heat paint coated from the spray can over the wrap. It needs recoated every 2-3-4 years with the paint, but it has proven to me to “seal” it. Now mind you after application of the paint, run it OUTSIDE to burn the fumes off and it’s gold. Done it. Still do…
Look. We wrap pipes because they look good. If anyone out there thinks there bike will be faster, your a complete idiot. Back in the day it was called splitting hairs! You will NEVER EVER feel any difference. If you want seat of the pants power. SPEND SOME MONEY!!!!!
I have a 98 113 s&s. That I wrapped . I'm still riding it today, its had one rebuild. Same heat tape from day one. Pipes are still structurally sound. Just take care of your shit. Heat tape is strictly cosmetic on harleys
I just wrapped mine ‘ Mrs asked what is that for , I said 3 reasons , extra power , looks good , and protect from getting burnt 👍 and yea my bobber now looks cool wrapped
For protection basically. So you don't get a palm sized 2nd degree burn on your calf... Twice... At the exact same spot...
I have a Triumph GT sprint which puts out a lot of heat from behind the fairings.
I wonder if the heat wraps would nullify some of the heat to make it worth it?
The benefits of exhaust wrap are really minuscule. The negative aspects of exhaust wrap are major. The exhaust wrap retains moisture and causes corrosion and failure of the pipes. Plus the cosmetic factor. Exhaust wrap looks absolutely like shit and gets worse and worse with time. I have my Trask turbo system pipes ceramic coated as well as on my '74 FXE. Ceramic is far far better than any crappy looking exhaust wrap.
It sounds weird AF, but i have seen a Subaru burst into flames on the dyno because of the wrapping. The thing developed a moderate cooling leak because of to high temps on the dyno. The coolant hit the wrapping and it literally burst into strange but huge blue flames with incredible heat and smoke. I have never seen something so close to water burn!!!! I still dont fully understand what happened but the only thing i can think of is that the water in the coolant somehow split into hydrogen/oxygen and combusted. I cant imagine EGT to be so high that this can even happen without the motor/turbo dying! Ever since that day i turned "allergic" to Exhaust wraps and turbo blankets.
Does exhaust wrap actually reduce the heat generated inside the combustion chamber?
I use one so when I fall off brake a leg arm I've got bandage handy
i did it for none of those reasons. idk if my method was smart but the theory was, engine would get really hot (too hot), the exhaust pipe ran in front of the engine, so when driving the hot gasses coming off the exhaust would come back at the engine. so i installed the best radiator the bike could get and wrapped the exhaust to eliminated the heat coming back at the engine. and well, it worked for me. bike doesnt overheat anymore (fj 1200 '89)
Um.....this is the problem w/ keeping the exhaust hot so that a pressure pulse can move faster. As gasses cool they contract. I would think it would be beneficial to extract as much heat from the exhaust as possible and as quickly as possible. But my physics professor used to say that he'd heard enough from the peanut gallery for one day.
I know i'm a bit late, but I can't help but think that doing both would be more talked about more? I'm sure a ceramic coating does a great job, but surely a coating with a wrap would be that much better, and the coating would stop any trapped water from fucking the exhaust?
Hello, after wraping the exhaust.. does it cause any issues if motocycle goes for wash?
I'm calling the cops, this guy Matthew Hudson deals in unsavory videos.
Does exhaust wrap help keep the piston and chamber cleaner due to more oxygen?
All that explanation.... and the wrap has virtually no effect. It is all looks, and copycat. It looks as ridiculous as a giant metal wing on the back of a Toyota Corolla.
Does it benefits from engine heat
I'm planning to wrap my xmax 300 scooter cause the exhaust pipe produce so much heat that it could warm up my bottle water in it, does it have any bad effect?
I have one qus.?? Is the exhaust going to get rust after removing it? Coz i got wrap it today,, I'm worried bout it ..if it get rust??
I think if your not going for the wrapped look and your not getting burnt or slowly cooked by your exhaust don't do it. Its shit for corrosion and you will not see any significant hp. Coatings are way better but expensive. your better off making a guard if you can than using this shit.
superbikes dont do it GP bikes dont do it.. It does stop burning your legs... Enough said
I thought it was to keep the wrong things from heating up. A la firewall of passenger compartment in a transverse set-up where header faces compartment.
Would it not also aid with cooling and power by allowing more cold air into the combustion chamber? I dunno shit about engineering though so would love to know if or why I'm wrong
the best reason is all 3, i dont have a heat shield on my exhaust, its ugly already so it will look better and if i gain a bit of scavenging even better. also i live in the south of Portugal, hardly any rain and i definitely don't ride in it and no salt on the roads so no real downside
Awesome explanation man been trying to find something like this for months. I'm thinking of doing a wrap on my Harley purely for looks, I'm slowly going from stock to chopper type build. My main concern is the effects on the carburetor, I've heard the increased exhaust speed can cause the bike to run lean. But from your video it seems like there won't be much change. Since you seem to know a lot on the topic, I'd appreciate your opinion on exhaust wrap creating a need for carb adjustments once installed. Thanks!
Changing exhausts totally can have (and usually does) an effect on the engine running lean. For exhaust wrap I wouldn't worry at all. In the video I talk about the physical difference exhaust warp CAN make, but I'm saying that loosely. Thanks for the comment dude and I hope that answers your question. - matt
Thanks that helps a lot. Appreciate the speedy reply too! Ride safe man!
You too dude - matt
No way will it change carburation !
Another good reason for exhaust wraps in this day and age is that the catalytic converter is more efficient at higher temperatures, so you want the exhaust gases delivered to the cat to be maintained to (as far as I remember) about 375 degrees C.
i have Exhaust Wrap on my ER-5 and i hate it when it gets wet it takes about 3 days to dry, meanwhile you stink from the smoke it pulls out.
Yeah thats one of the prices that come with looking AWESOME! lol
I wrapped my single-cylinder dual exhaust header to keep heat off the air cooled engine and my leg.