Reply With QuoteThanks for posting, good info.
for those that love the Taitec GTLW, love the sound and the weight reductions....but have to deal with the droning.
here is my solution. this is a Sound proofing/ heat resistant jacket. I have seen in one of the car-mags an aftermarket exhaust jacket made for Enzo.
Taitec GTLW is brand new
Comptech headers
Random Tech-Hi Flow Cats
I have been driving around for a week, to San Jose, around town, and NO DRONING anymore, the sound is still stellar.
Thanks for posting, good info.
Cool product. But looking at the underside of your car makes me think that you don't drive it too often.
I have two NSX, my Red is my daily most of the time. the blk has only 22k miles.
What is the name of the product? Cost to install it? Was it easy to install?
Good? Bad? I'm the one with the gun.
Please let us know the product details. Thanks!
NSX Prime Vendor Listing: Lithiumus
91 Formula Red #332
these materials are used for diesel turbo marine engines. so it will take 1200 degrees heat, plus take the sound away. The material inside is for the sound/heat and the outside is a aluminum/like fiber like cloth.
I haven't done the weight add, but I am guessing around 1-2 lb. the aluminumize outer material around the canister is vinyl like feeling, but the part that touches the tubing did get a bit crisp.
I purchased all the materials in the Raw in bulk, so I did the work to wrap it. I am going to make it with snap buttons, so more plug and play.
when I complete a final product, it will be easy to put on, perhaps even with the exhaust still on, (perhaps) and cost should be low. low enough to purchase it and the end results to cut the droning and still sound and look good.
let me know if you are interested.
see if you can make one to fit my Tubi... sometimes I have to drive with the windows open to eliminate the droning...
Thanks
patrick.
2008 FJ Voodoo Blue
1999 Comptech SC Monte Carlo Blue
I am interested..please keep us updated.
Good? Bad? I'm the one with the gun.
A side question.... is it a good thing for the muffler to be covered up like that? The heat from the muffler needs to be dissipated somehow right?
Henry.
this can be made for all Exhaust. just a matter of fitting them.
here is more info:
it is about 3/4 inch thick, I am going to make 1 inch thick to see if it changes anything.
it will smoke a lot for a few days, of normal driving. this is the breaking in period, so in the breaking in period, at stop lights. I and everyone else around me thought my NSX was going to blow up..or on fire, it was a bit embarrassing, looking at a black shiny NSX but smoke like a beat up 70's car.....YIKES...but it didn't and the smoke went a way after 4-6 hours of driving. So a good long freeway trip would be the way to go.
Smell, yes, it did smell like something is melting, my wife made a comment, wow, it is a lot quieter, I like that, but whats that smell?
I contact the company I purchased the raw materials, they did say that is normal but not to worry, it will take up to 1200 heat. and smells and smoke goes away.
I am seeking to use metal snap buttons so it can be taken off and on. I will get it open after a few days and see the look of the exhaust and the material.
will keep posting results.
Lito
Hi Lito,
I'm definitely interested. Keep us updated and let us know about the heat dissapation issue as I've also heard that containing heat can damage the internals of headers and exhausts.
NSX Prime Vendor Listing: Lithiumus
91 Formula Red #332
Originally Posted by nsxhk
that is a good question. I did some search on the web. the info I found was about cracked exhaust and headers. it was being wrapped in racing wraps. out of about 30 or so sites and threads of other experience.
Most all said, " a friends cracked, or I heard it will crack"....none that actually stated, MINE cracked......untill I found one thread on a V6 with headers, that owner claimed after 10 years, his headers cracked and stated perhaps the exhaust wraps probably didn't help.
found some blown exhaust, but didn't find it due to being wrapped. I really couldn't find any site with wrapped muffler jacket.
I did find a site that stated issues of keeping the heat in, will cause the steel to breakdown faster due to keeping the heat in...but also found this site for aircraft, I copied it and pasted it.
_________________________________________________________________
site is under
From "Construction Notes" Falco Builders Letter, September 1994
" " " Glyn Russell is in the process of finishing his Falco and was curious about the material that Steve Wilkinson used to wrap his exhaust system with. Steve replies, "The wrap is called Thermo-Tec, it's used on race cars and hot rods, and it's listed under 'exhaust wrap' in the Aircraft Spruce catalogue. Also, the naysayers who seem to gravitate to aviation will warn you that it causes exhaust cracks and other dire consequences. About a year ago, I was talking to the president of Borla Exhaust Systems, perhaps the preeminent manufacturer of aftermarket exhaust systems for Ferraris, Lamborghinis, Porsches and a wide variety of race cars, and I asked him about this. He said that was nonsense. If you wrap a cheap mild-steel tubing exhaust system with it, yeah, it'll crack, he said. But wrap any kind of quality stainless system, and you won't have to worry about it. Mine has been on for 400+ hours (I change it at every annual, since I inspect the pipes, and you can't re-use it) with no cracking."
Steve Wilkinson faxes, "FYI, I just got off the phone with a guy names Alex Borla, who is one of the top automotive exhaust-and-muffler experts in the country. He builds stainless-steel systems for everything from Lamborghinis and Ferraris on down, consults for Chrysler and Ford, and his systems are considered the performance-car after-market gold standard. He also does lots of race-car work."
"Anyway, I was interviewing him for an article I'm doing on the lightplane noise problem (he has a Baron and is working on designing muffling systems for aircraft), and when I was done, I asked him if what I was doing on the Falco-wrapping the exhaust system in that asbestos-like tape that supposedly keeps the exhaust hot and adds to the extractor effect, as well as slightly quieting it-was doing it any harm. He said that if the exhaust system was mild steel yes, but if it was a good-quality stainless, as our is, absolutely not. He also said that it indeed would add some power."
"He said that the only way you could possibly hurt the system by wrapping it with that tape is if you got the EGT about 1,700-which, of course, would require that you lean it to peak at a very high power setting. You probably already know all this, but he also said that the key to designing a durable high-performance header system is allowing the thing to 'work' through slipjoints, as everything expands at different rates. I described our system to him, and he said it sounded excellent." "Anyway, I found that reassuring " " "
_________________________________________________________________
back to the topic, I have had my red NA NSX for about three years ago I wrapped my comptech headers, and last year I installed the Taitec exhast....after driving around, the drone came, thats when the search for stopping it started for me. one day with the exhaust still bolted on, I wrapped a thermal blanket over the muffler.....and drove around...it worked, no droning, but it started melting.
I did purchase the exhaust wraps again and ended up wrapping the taitec muffler. it didn't stop the droning..but as of today, that NSX is mostly my daily driver and have taken it to a track one time. Miles with wrap around 1000 per month for past 3 years.
for me, nether header or exhaust as shown cracking.
the materials i am using now on these pictures, are not the wrap, they are almost same materials that is IN all mufflers.
so from my researched, it depends on the quality of the steal, and like everything else you purchase as a aftermarket, headers, exhaust, turbos, supper chargers, they don't usually last as long as OEM.
some research info on
Heat dissipation and internals of headers and exhausts question?
First off, what I found out was OEM exhaust actually let off less heat, due to heat shields and muffle materials in mufflers, which also makes it heavier but make it quite and no droning. So it keeps heat inside. For example, if you put the OEM side by side to aftermarket you will see the after market is much smaller, less material.
OEM manifold made of Iron are used due to cost and will last much longer, but are heat sink tanks, give out a lot of heat…but is part reason why it creates a lot of back pressure, other reason can be the design restrictions of the chambers.
heat dissipation are said to get the hot gasses out of the engine, and the length of the tubings from engine to the end of the tail pipe and size in diameter of the tubings creates extractor effect...this can make/take hp away. Most tubing’s should be matched with the engines pulsation it gives out…..2.5 tubings are more beneficial then larger tubings because, it is smaller, forces compression and gets out faster.
So adding a sound proofing jacket over the exhaust that will not melt away, what will it do? I wanted it to stop the droning.
I must rely that the aftermarket exhaust I am purchasing from all these reputable companies and vendors are, as they claim these are top quality equipment.
How long will your exhaust last on your NSX if you put a sound proofing jacket on it? Well, that can all vary like every NSX is deferent…and also depends on your spending habits. I have two NSX, have spent over 5K on exhaust, headers and HI-Flo Cats, not that one broke on me, I just happen to be on that dam slippery slide slope on mods and I just can’t seem to get out of
I just didn’t want to drive around with the droning anymore. And still keep the straight through tubing design on aftermarket exhaust that creates the performance and sounds we love to hear….the sounds that screams…….I AM NOT OEM anymore.
Status...
Still driving around a bit more and longer…..went to Sacramento and back...
still a lot quieter in the a cabin through all RPMs...... I hope to compare to my other NSX with the exact same Comptech headers, Hiflo Cats, Tiatec GTLW…and drive back to back…that NSX is still in shop for wide body.
I also made a jacket to cover the Comptech headers.
any updates, or final product? any idea on cost? I am considering the gtlw that is onsale through today, but i do not want a droning exhaust at all. I def. prefer the weight savings of this exhaust, and am very interested in this product.
thanks
Randy
91 blk/blk
Randy
as of now I have only a one off product. but still keeps the sound in cabin much improved over uncovered. I am looking for easy to install buttons. so it can fit many sizes.
Shad (formerly with Comptech 14yrs) just did a AEM tune on it and now he is doing my NA NSX with the Taitec NOT covered, I will ask him in sake of second opinion.
As of now, the materials are holding up well, the sound of the exhaust is still exhilarating, but instead of hearing it in the cabin as well, you mostly hear it in the back of the NSX while driving the way it should be.
Alright, after your input ont the ZTek & Taitec I went with the GTLW. So I'm probably going to be interested once it is installed.
94 Toyota Pickup
95 Acura NSX-T
99 Acura 3.2tl
05 Honda CBR600rr
Lito:
One question.... What does Shad think?
This is your track car... Superchared car... Small comptech cats...
That exaust is going to get very HOT. Who cares what it sounds like as long as you keep me in your rear view mirror.
The first time you go farming at Thunder hill you will shread it!
Later,
Don
hey Don
the wrap is on my CTSC, Shad has my red NA and no wrap.
yes it does run HOT, but the material can stand up to 2000 degrees.........this is the same material used for wrap of turbos diesel boat engines.
the droning was starting to bother me...thats why I searched for a wrap.
see at the tracks
Lito
I think you are going to burn up your exaust... Check with Shad.
See you at the track...
Later,
Don
Posting Permissions
Bookmarks