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| Exhaust Wrap | |
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| Tweet Topic Started: Mon Apr 21, 2008 12:19 am (1,261 Views) | |
| eire_190 | Mon Apr 21, 2008 12:19 am Post #1 |
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hey guys, id really like to get my 16v manifold wrapped with that exhaust wrap. personally i think it looks really nice. especially the white/cream colour ones. big improvement from the corroded standard look anyways imo. well i know now, it helps to keep bay temperatures down,also helps exhaust gases move away quicker(better engine breathing). however, someone told me that it also rapidly deteriorates the exhaust header and other engine parts due to it being much hotter inside the insulation... so is it a good idea or not? its not cheap so i dont want to buy it only to find out it does more harm than good! also does it have to be sprayed with sealant or something to protect it from oil spills/leaks etc? |
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| smiffy | Mon Apr 21, 2008 12:37 am Post #2 |
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just strumming me paws...........hum-de-hum!
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they will bring ex /engine bay temp down,but my 2pence worth is,if your running a n/a block nah,just repaint(just wire brush the metal to prep remove scabby craked paint),if your running a turby then id recommend the wraps. look good though,there cheap as chips on flea bay,depends on how metres you require.your car your decision
hope all is going well your end conor
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| marcus.hopkins | Mon Apr 21, 2008 12:44 am Post #3 |
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Administrator
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Wraps are beneficial to any engine as they force the exhaust gases to exit much faster giving a much cleaner burn improving overall performance. ~But wraps are only part of it. New plugs leads and airfilter will all aid a clean efficient burn of the fuel. Marcus |
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| smiffy | Mon Apr 21, 2008 2:33 am Post #4 |
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just strumming me paws...........hum-de-hum!
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wraps are a little of it as you said marcus, i still stand by my views on ,n/a engines no, turbos yes. if they were that beneficial ,every car would have them as standard issue. i used "thermotec" on the pulsar it was ok,If you do go for it I suggest you get some stainless steel jubilee clips to lock in each end,and wet the cloth before application as its more plyable and to wrap tight,after a while they get tired and britle though, and discolour. |
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| marcus.hopkins | Mon Apr 21, 2008 7:29 am Post #5 |
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Administrator
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lol My mates just bought a pulsar in place of his skyline (skyline for sale if anyone is interested). He loves the pulsar but has just been horrified by the price to supply and fit a clutch.lol Marcus |
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| smiffy | Mon Apr 21, 2008 12:30 pm Post #6 |
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just strumming me paws...........hum-de-hum!
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f lol! horriefied on the price on the clutch :lol: they do eat them. the det engine is a workhorse though marcus,gearbox and diffs and cv boots on the pulsey were made of lego there that weak
did it have the infamous search for the holygrail- unbrella in the passenger foot well? does it have a fmic or the standard intercooler that loves heatsoak
brilliant motors bud,run up to 15 psi on them no problem without any pinking. sorry for rambling on. |
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| dave_irl | Mon Apr 21, 2008 12:44 pm Post #7 |
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Defector
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I'd say if anything they would be more beneficial on an n/a car, where every little helps, than on a turbo.. Also a turbo would run a hotter manifold than an n/a would it not - therefore exacerbating the heat-deterioration problem if it exists (which IMHO I dont think its a big deal - especially so on an n/a). Regarding the coating stuff, I think thats for older wraps, most new ones come pre-impregnated with the sealant, the graphite black wrap I got is pretreated so no need to buy a can of the spray stuff. In general though as Marcus says its good to keep the exhaust temps up which keeps them moving faster, improves exhaust scavenging etc so your car will breath a little better... If its just for looks then just paint the manifold. I vote yes on wraps Ps it would be handy if you had an EGT (as part of your a wideband setup ala VEMS gauge for example) and you could do a before and after to see the difference of the temps.. I think you would see a difference alright, but probably still not up to header melting/cracking temps. Downside is its much easier to fit the wrap when its off the car so I think a before and after is unlikely! Smiffy, ramble on! I hear you on the Pulsar IC's, the cheesegrater position seems a bit daft, those barrelcoolers I showed you could be an interesting solution dont you think? If space allowed that is. Awesome car I'd love to have a spin in one. |
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| smiffy | Mon Apr 21, 2008 1:20 pm Post #8 |
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just strumming me paws...........hum-de-hum!
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dave,im getting concerned on your fetish,s for i-c mate :lol: we have to talk,oh and and lovely link you sent me.........c- coolers are fapping ace though i think water sprayed/mist is best.
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| eire_190 | Mon Apr 21, 2008 8:58 pm Post #9 |
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ok lads, thanks for that. i might go with it so.... i think it looks ace when done right. i dont think it would be a great idea to paint the 16v manifold. i reckon it wouldnt come out great. should it not have the 'polished' look instead? maybe someone has pics of a painted 16v manifold to prove me wrong? |
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| ROBINWALSH | Mon Apr 21, 2008 9:12 pm Post #10 |
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hers some pics of my wrap
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| dave_irl | Mon Apr 21, 2008 9:28 pm Post #11 |
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Defector
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Nicely done.. Manifold looks pretty mint underneath it too.. |
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| Neil | Mon Apr 21, 2008 9:32 pm Post #12 |
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Newbie
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I do like that. Never ever seen a painted 16v one - tbh it gets so hot that MB felt the need to put a foil section into the 16v bonnet insulation above the manifold, and considering normal 8v & 12v manifolds discolour even High-Temp paints, I'd say that painting a 16v manifold would be utterly pointless. |
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| Chunk | Mon Apr 21, 2008 10:12 pm Post #13 |
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Spammer Zapper
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Well worth doing the wrap Done it to the intercooler pipes & de-cat pipe on my Impreza. Just a pain to keep clean |
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| Enthusiast | Tue Apr 22, 2008 12:40 pm Post #14 |
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robin tidy exhaust and engine bay! have you had your manifold painted/cermaic coating too? |
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| ROBINWALSH | Tue Apr 22, 2008 9:54 pm Post #15 |
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Yeah i painted it with high temp paint 2 coats but you need to get rid of all the rust or it wil flake :wacko: |
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| RobertE | Sun Apr 27, 2008 11:14 am Post #16 |
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Serial victim...
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Robin, I mention this only for what it is worth, as I do not know myself, but Jesper (Racing) made a contribution on the Rev site that exhaust heatwrap was a bad idea as it can cause the manifold to crack over time. But, I must say that the LHD manifolds which he knows look a lot less robust than the RHD ones; the latter have all sorts of braces gussets and supports welded into them which the former lack. But it is, given the eye-watering cost of new ones, perhaps a point worth making. But it looks great! |
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| cossie connoisseur | Sun Apr 27, 2008 11:21 am Post #17 |
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there can be only one ;-)
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the 16v manifold is prone to cracking and splitting so exhaust rap with the increased temps will cause more of a chance of failure. this is expecially true of the un modded manifolds before MB discovered the problem i myslef like the wrap and it does help the car as an 'aid' to other mods described above BUT our manifold though a very fine work of art is not really strong enough to last longer than mabie a year or 2 that is my view and choice on the matter, if it was safe i would have done it on my cars by now but i wont as its not worth the risk |
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| JustbeCoz | Sun Apr 27, 2008 7:13 pm Post #18 |
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I don't believe the cracking cosworth manifolds on early cars were anything to do with heat, It was more a mechanical stress issue caused by flexing of the manifold. The later manifold with extra bracing is not prone to cracking is it ? The use of exhaust wrap should have no significant effect on the manifold temperature as the temperature in a thin walled pipe is governed by the temperature of the fluid or gas going through it and it's ability to exchange heat with the surrounding air is limited by it's relatively small surface area. The more important issue may be the removal of a free supply of air to the stainless reducing its ability to passivate and reduce it's corrosion rate. That's my tuppence worth but more than happy to be corrected. |
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| Lewis 190E 2.5 16 | Sun Apr 27, 2008 7:18 pm Post #19 |
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You are right... The later ones did have extra strips of metal welded in place to stop the manifold moving too much which in turn did crack the manifolds, the later ones had more support, this was round 1988 the later manifolds were used.... |
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| cossie connoisseur | Mon Apr 28, 2008 11:21 am Post #20 |
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there can be only one ;-)
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the revised ones can still go, there were a couple of instances last year. the lack of suport was a factor but also the heat, if you look at the welds they are pretty bad tbh, dont get me wrong its very rare but still possible
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| p rossi | Thu May 1, 2008 6:21 am Post #21 |
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Newbie
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[if they were that beneficial ,every car would have them as standard issue This is not true..at least in the U.S. remember cost is always considered when a car goes into production. I believe wraps work great for any car, N/A or forced induction. I have used them on many of my cars the only concern is that they can hold moisture which is the reason many people stay clear of them. I have a turbo set up on my cossie and used wraps throughout. I actually tested the improvements on a dynoand gained 3.5hp after wrapping the turbo, intake piping and the exhaust. I believe this was achieved because my IAt's dropped 3 degres on intake side where i used the aluminized wrap and i used the fiberglass type on the exhaust and also wrapped the turbo the heat from the turbo was contained so the temps under the hood (boonet for all of you) dropped,overall i have always been pleased with the results. BUT, like i said these wraps can cause failure due to the fact that they can hold moisture so if you decide to use them keep this in mind! |
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| ROBINWALSH | Sat May 3, 2008 8:43 pm Post #22 |
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I think after a while the wraps effect wears off to an extent and the chance of cracking reduces also the manifould has larsted 18 years so i think it all have many more years in it |
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did it have the infamous search for the holygrail- unbrella in the passenger foot well? does it have a fmic or the standard intercooler that loves heatsoak


9:27 AM Jul 11