Heat Wraps On The Exhaust Systems

[stasis]

Hi guys,

im going to fit my whole exhaust system tommorow and i noticed that the front pipe doesnt have the heat shield like the original one. Should i wrap up the front pipe with heat shield wraps or not? Thanks guys

[STAGE-A]

Always a good idea

[GOT04]

if ur car is heavly modded then i deff do it.....

[3intheBack]

If the dump pipe is mild steel then the wraps will make it rust quicker then normal.

You can also try to cover the general area with metal sheets like the orginal - nice stuff to use is the heat sheild that comes on AU Falcons - you can buy uncut sheets of it from places like Repco. It has a nice waffle pattern.

[stasis]

ohh sorry guys all my stuff is made out of SS. I also heard some people said that it might damage the SS in the long run cos when we use the heat wraps its actually keeping the heat in not dipersing out.

Shoould i wrap up my dump pipes as well. They are Hkss and made out of SS as well. THanks again guys

Edited August 17, 2006 by stasis

[3intheBack]

cos when we use the heat wraps its actually keeping the heat in not dipersing out.

This is generally the point - to keep the heat in. I am led to believe that keeping the heat in makes the exhaust gases flow faster. Conversely, as they cool they slow down. High flow is important for the first few feet of the pipe after the turbo - which is why you will notice an increase in torque when you put on a 3" dump/front.

The main reason to use some form of insulation is the keep heat out of the engine bay - noticed where your A/C pipes are? Noticed how hot the A/C gets when you hold it on boost for awhile?

The front pipe is under the car and subsequently exposed to the elements so any form of wrap will absorb a lot of moisture and is open to getting hit/scrapped.

The major problem with a metal heat shield is stopping it from rattling.

I dont see how you can wreck SS with wraps, that is why everyone uses it. It just looks nicer and more hardcore when it can be seen.

[AlexCim]

I wouldnt bother to wrap a front pipe or dump pipe, but I would wrap a exhaust manifold (but stocks are good for 300awkw anyway so.....)

just me

ive learnt there is a lot of stuff that just isnt worth the money.

[stasis]

are you sure that stock exhaust for the 260rs are good for 300kw? my dump pipe are the ones with the wastegate 3" , front pipe is 3" and its got written on it for "competition use only" and the exhaust is also 3" and the out let is 190mmx90mm.

i think i would definetely wrap the front pipe just to protect it from hitting the bumps and scratcehs.

[AlexCim]

I dont think you understood what I said.

I said id wrap an exhaust manifold, but the stocks are ment to be good for 300awkw anyway.

Exhaust system goes as such

Chamber -> Exhaust Manifold -> Turbo -> Dump pipe -> Front pipe -> Cat -> Catback

As far as wrapping a front pipe, well, let me put it to you this way. When I made my turbo/manifold glow, it was glowing bright red, but the dump pipe was not glowing at all. This suggests that most of the heat is in the turbo/exhaust manifold, meaning it makes sense to wrap these things and not the front.

Protection? Mate, if you sratch a steel pipe, it doesnt affect performance. Its not like 2mm of fabric would protect it anyway if you were doing decent damage anyway (aka, hitting a rock or something)

[stasis]

I dont think you understood what I said.

I said id wrap an exhaust manifold, but the stocks are ment to be good for 300awkw anyway.

Exhaust system goes as such

Chamber -> Exhaust Manifold -> Turbo -> Dump pipe -> Front pipe -> Cat -> Catback

As far as wrapping a front pipe, well, let me put it to you this way. When I made my turbo/manifold glow, it was glowing bright red, but the dump pipe was not glowing at all. This suggests that most of the heat is in the turbo/exhaust manifold, meaning it makes sense to wrap these things and not the front.

Protection? Mate, if you sratch a steel pipe, it doesnt affect performance. Its not like 2mm of fabric would protect it anyway if you were doing decent damage anyway (aka, hitting a rock or something)

well you dont undertand what im saying. i dont care about the manifold thats why i didnt include it. All i want are the dump pipes, front to be wrapped why? The dumpsand front pipes is closer to the firewall in the 260rs and the front pipes runs directtly below that onto the firewall and right before the gearbox starts.

Now i dont want the extra heat to be transmitted into the cabin thus the wraps. Wrapping up the front i will take a picture of my original once its off to show why i want it wrapped up. I dpnt care about stone chips ETC. All i care its about heat and in conjunction with the litle protection that the pipe gets from the wraps. Now you see the picture?

This is what i learnt from my Rx8 as the heat penetrate to the cabiin and im reducing that as much as possible through wraps i hope

[siddr20]

The main reason to use some form of insulation is the keep heat out of the engine bay - noticed where your A/C pipes are? Noticed how hot the A/C gets when you hold it on boost for awhile?

This is very true.. The a/c pipe does tend to get very very very hot!! If you have a spilt front/dump pipe and the wastage pipe is actually touching the a/c pipe this can be a disaster in the summer days..

So yes do wrap the pipe up.. Better to be safe than sorry..

The dumpsand front pipes is closer to the firewall in the 260rs and the front pipes runs directtly below that onto the firewall and right before the gearbox starts.

This is also the case in the r33s s2s.. It can actually burn all the sound deadending stuff under the car..

So i suggest we all wrap these pipes up to be safe.

[CruiseLiner]

i always wrap the dump pipe/s and front pipe down to the area where it starts running parralel to the ground to keep engine bay temps down, it costs like $25 to wrap it all and u can touch exhaust where tape is str8 after a dyno run and its not even burning hot so its definately worthwhile, and also protects the paintwork on the firewall area too

[stasis]

hows the best way to wrap it tight and wat do i use to stick them. I have decided to wrap the dump and front pipe although the dump pipe will be abit more ticky cos its much shorter and tighter.

[EGA41T]

if you have the money, get an exhaust shop to take it off, wrap it and fit it back up again, or do it yourself, you will get much better results if you do it when the dump/engine pipe is out of the car

[AlexCim]

get some metal zip ties, any good car shop (bursons) should be able to supply you with some. They are pretty expensive though.

Start wrapping from the top down, overlap each turn maybe 1/2 to 1/4 and any joints overlap a bit too.

If you are using it for protection, id put more metal zip ties.

[stasis]

cool thank guys got myself an idea . probably SS clamos on each ends and metal zip ties? what do you guys think? or not worth it just use metal zip ties?

Fitted the exhaust and the high flow cat yesterday Very good. more high end torque. And the note is very nice will try to upload it later.

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