Heat Wrap
I was at the exhaust shop getting new Magnaflow tips and I noticed how hot the SR mid pipe and the catback was and I was wondering if heat wrap would really do anything.
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bump.
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not really. the way i understand it is that heat wrap is more to keep the heat from effecting anything else, i dont think it would do anything to help cool the pipe.
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heat wrap is extremely effective when used to contain the heat. So by wrapping your exhaust you basically save everything surrounding the exhaust from heating up.
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Hmmmm. I just wondered if it would change the sound at all. It sounds just a tad better than stock but still a little raspy.
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wow those tips stick out far... is that just the angle of the pic or something?
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those tips look smaller than stock?
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The tips are 3" Magnaflow tips. They do stick out too far and are slightly off angle but my friends tell me I'm crazy. I am going to get them fixed this weekend. The shop that sold me the tips and installed them gave me a hell of a deal and did a great job fixing up the SR mid pipe. I paid like $70.00 for the tips installed so...... Now I am thinking I should have went with 4" tips.
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Using header wrap will change the sound of your exhaust because of the simple fact that as you contain more heat in the exhaust rather than being lost to the surroundings it causes the exhaust speeds to remain high increasing power and altering the sound. However as a warning the wraps causes the pipes to retain heat much longer and can lead to premature failure of the pipes. The most effective way to maintain higher internal temperatures with out the risk of destroying the pipes would be by using a thermal coating (much more expensive).
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The exhaust is sort of raspy (like metal sounding if that makes sense). I'm gonna try the wrap.
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Originally Posted by 9krpmrx8
(Post 3054636)
Hmmmm. I just wondered if it would change the sound at all. It sounds just a tad better than stock but still a little raspy.
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I've wrapped a lot of motorcycle exhaust with the stuff and it usually causes a "better" tone. There's only one time I can think that I had something with your raspy type sound and it made it better but didn't get rid of it.
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Make sure you wrap them correctly and soak the wrap if need be (directions) to get a tight wrap. If done incorrectly you can get moisture in there down the road which will cause the pipes to crack or break at the welds.
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Thanks guys. I'll take better non filthy pics with a real camera later but I got the tips fixed. just need to polish them up after all the welding grime.
http://c4.ac-images.myspacecdn.com/i...ea36c86b23.jpg |
Also the wrap will force the exhaust to flow faster to escape.
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Originally Posted by Razz1
(Post 3060095)
Also the wrap will force the exhaust to flow faster to escape.
Really? Hmmmm. Think I would have to remove the exhaust to do it? Seems like there is space but i have never worked with the stuff. |
Yep, its thermal Dynamics. You won't notice it.
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Hey Scott here is the stuff i used on my exhaust... did it on the bend that goes by the rear diff... good stuff had it on for over a year now... get the 2" wide in black...
http://www.advancespeedshop.com/imag...0Packaging.jpg |
Did you buy it local?
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many of the replies in this thread have made teh baby Jeezus cry
makes me wonder if some of you have actually used it vs just reading the marketing schtick in some ricer magazine |
heat wrapping anything makes it sick aggressive mad tYt3 y0~!?
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Originally Posted by TeamRX8
(Post 3062095)
many of the replies in this thread have made teh baby Jeezus cry
makes me wonder if some of you have actually used it vs just reading the marketing schtick in some ricer magazine |
Originally Posted by TeamRX8
(Post 3062095)
many of the replies in this thread have made teh baby Jeezus cry
makes me wonder if some of you have actually used it vs just reading the marketing schtick in some ricer magazine and Scott most auto parts stores carry this or you can order it online... |
Cool, Thanks.
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Old thread but bumping because I'm curious if heat wrapping the header actually got rid of the metal tin sound...because I'm experiencing that right now with my midpipe, and it's by far the most annoying thing in the world. :/
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if it sounds raspy it coming from the midpipe, not the header
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Yeah I still have the raspy sound too. I'm glad you bumped it, I'm gonna do this this weekend along with welding my clutch.
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Not always true Dozer. Racing Beat said it themselves too (just spoke to them on the phone) if the walls of a header are too thin, then it could create some sort of buzz. heat wrap has been known to help but not always.
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i dont know if it will fix the sound but i dont think it costs much so why not try :)
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will wrapping of the header or midpipe toast the O2 sensors?
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Originally Posted by rx8dorifto
(Post 3177639)
will wrapping of the header or midpipe toast the O2 sensors?
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Here's word of advice:
I wrapped my previous Miata's header (actually two of them). One was a Maxim Works Header and the other a Racing Beat 4-1 SS Header. Both of them were not your run-of-the-mill ebay header. They had great welds and great construction. After I heat wrapped the headers, over time, they eventually failed at the welds. My other friend who had the same headers (he was a CSP guy and the Maxim Works was popular amongst them) didn't crack his after 5 years of abuse - but he has no wrap. I can assure you that the surrounding temperatures will go down for sure. However, I'm guessing that the path that the exhausts run need no additional wrap. If you do have to wrap, make sure to keep 1/4 inch overlap and constantly pull from every angle. You do not want ANY moisture to get in there are start rearing its ugly head. |
I just want this wrap so my interior doesn't get so hot. http://www.amazon.com/Floor-Tunnel-S...=3UWO3DNZZD7ZJ
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I never thought about moisture (not that we have had any) but i guess I can unwrap it and re-wrap it in a few months.
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Dang this stuff is $50.00 at autozone for one roll!!!
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team may have some good points, but not all.
the product warns you of voiding header manufacturer's warranty, so take caution. stay away from this wrap for those using ceramic coated headers. it cracks them for sure, and from personal experience... it does! so the warning is reasonable. just need to not ignore it! i did not have any problems using it on the mild steel oem headers on my honda, or any stainless steel ones... which is where most bikers use most of this stuff on. so as long as its not a thin crappy ceramic coated metal... you may be fine. my friend has this stuff on his old 60s bike without any problems on oem mild steel pipes. so its ur call... stainless steel "should" be more than strong enough to handle it, unless of course, its made from somewhere that doesn't care about quality control and cuts corners. so again, the thickness again may play a role. i'd surely stay away from ceramic coated ones... any inputs are welcome if i'm wrong |
I will be putting it on my SR midpipe.
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Moisture??
Any moisture in the wrap will cook out in the first 5 minutes of you running it. Not to mention that you're actually supposed to soak the wrap before you put it on so you can wrap it better. Moisture shouldn't be an issue. |
Originally Posted by monstermatt
(Post 3192308)
Moisture??
Any moisture in the wrap will cook out in the first 5 minutes of you running it. Not to mention that you're actually supposed to soak the wrap before you put it on so you can wrap it better. Moisture shouldn't be an issue. |
Originally Posted by monstermatt
(Post 3192308)
Moisture??
Any moisture in the wrap will cook out in the first 5 minutes of you running it. Not to mention that you're actually supposed to soak the wrap before you put it on so you can wrap it better. Moisture shouldn't be an issue. I'm really considering wrapping my midpipe (don't like the rasp), but I've heard both - avoid moisture, and now, not to worry about moisture. :uhh: I almost imagine that it wouldn't matter too much, since driving the car in the rain will certainly soak the wrap anyways. Hmmmm.. |
if you really want to wrap the exhaust here are some things i have experienced
1- you will have to replace the wrap at some point. 2- if you wrap too much to close to the o2 sensors--they will not perform correctly. My a/f gauge (LT 1) which has been spot on for a while recently went crazy when i was stuck in traffic--going 3 mph in a 95F day. I dont know about the factory one--car was running ok but i am sure the increased heat was also affecting it some. I had my oem header and midpipe wrapped. 3- after that i unwrapped and installed a heat blanket that is elavated above the pipes by a bracket , i also installed it to shield the trans. I also placed some heat protection on the floorboard part above the pipes. No prob since. 4 heat wrap will make the exhaust gas hotter at the ends and it will be easier to melt the chad close to the exits. hope my experiences can help someone. OD |
Hmmm. So it will make my tips hotter? I don't have a problem with my shrouds melting and I don't want a problem.
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yes it will--especially on the track or autocrossing where you have a more constant wot. The heat has to go somewhere-----?
OD |
Even without a wrap,
I've melted my shrouds a tad bit from running in the canyons at a very aggressive pace. Also, my tips were glowing red at the top of the mountain for a tad bit. I also have some of the finish coming off the tip of my MS exhaust.....I think from the constant heat. |
I have used both but ceramic coating is a better bet. More expensive if professionally done but lasts alot longer, looks better, doesnt hold moisture and wont have the cracking problem some people get with wrap.
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Originally Posted by sweatr
(Post 4464599)
Law one Hot goes to cold.
Question is what to wrap. On my 8 there isn't a lot to wrap except the long piece of pipe after your cat. Any thing with welds will suffer heat degradation and fail earlier. |
If the (after wrapping) hotter exhaust picks up velocity, why? It does so because there is greater pressure between the manifold and the tailpipe exit. That greater pressure could be called backpressure ....
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that depends on how many strands you want to split a RCH into ...
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i dont understand the point of wrapping a header to be honest, and you have to ask yourself exactly what your main purpose is.
For example, why would you increase the velocity of the exhaust ? what is the purpose? No, it will not give you any gain on a renesis. Exhaust wraps main purpose was to improve exhaust scavaging at the header, and considering the renesis is a zero overlap engine ... there really is no point. Second, like OD said, wrapping the exhaust INCREASES temps at BOTH ends. Now, consider "both ends" of the exhaust... what is on one side? the tips right? so what, you melt a shroud, nothing to cry about ... what is on the other side of the header? The side plates of the rotor housing. Now do a little reading on the renesis engine and realize that the main caveat of its design is that its exhaust flow goes through the side plates ... those side plates thus have a hotter deltaT than the rotor itself. What does that affect? One of the most critical failure points of a side exhaust rotary engine ... the side seals. Ok fine ... lets just forget about that problem, and lets consider that heat doesn't just magically dissapear (mr 'i quote thermoD but clearly dont know a lick of shit about it). Anyone ever see what an exhaust header gasket looks like after miles of abuse on a wrapped header? you would be surprised how badly it is trashed. Again, this isn't something new, and has been discussed ad nauseum on this forum. They have even been discussed in VARIOUS books on the renesis engine. Like I said bud, you are retired ... you stated you have plenty of time on your hands .... pick up a good book and do some reading... you would be surprised what the world outside of a "Harley" entails |
Originally Posted by paimon.soror
(Post 4465416)
i dont understand the point of wrapping a header to be honest, and you have to ask yourself exactly what your main purpose is.
For example, why would you increase the velocity of the exhaust ? what is the purpose? No, it will not give you any gain on a renesis. Exhaust wraps main purpose was to improve exhaust scavaging at the header, and considering the renesis is a zero overlap engine ... there really is no point. |
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