EXHAUST WRAPPING

[CHEF_GOLF]

HI I AM PLANNING TO WRAP MY EXHAUSTS, IS IT A GOOD IDEA, DOES IT MAKE ANY DIFFERENCE TO UNDER BONNET TEMPS OR PERFORMANCE , ARE THERE ANY DOWN SIDES, HAS ANYONE DONE IT, AND FINALLY HOW DO YOU DO IT. HELP
ALSO DOES ANYONE HAVE A GOOD INSURANCE COMPANIES DETAILS AS MINE IS CURRENTLY SORN AND NOT INSURED AND I AM AFTER A COMPETATIVE QUOTE FOR LIMITED MILAGE.
CHEERS

Edited by CHEF_GOLF on Thursday 22 February 23:29

Edited by CHEF_GOLF on Thursday 22 February 23:31

[V-GOM]

Be careful, partial wrapping will only transfer the heat elsewhere.

[Griffter]

CHEF_GOLF said:

HI I AM PLANNING TO WRAP MY EXHAUSTS, IS IT A GOOD IDEA, DOES IT MAKE ANY DIFFERENCE TO UNDER BONNET TEMPS OR PERFORMANCE , ARE THERE ANY DOWN SIDES, HAS ANYONE DONE IT, AND FINALLY HOW DO YOU DO IT. HELP
ALSO DOES ANYONE HAVE A GOOD INSURANCE COMPANIES DETAILS AS MINE IS CURRENTLY SORN AND NOT INSURED AND I AM AFTER A COMPETATIVE QUOTE FOR LIMITED MILAGE.
CHEERS ]

It's a good idea if you need to get heat away from the engine bay in the vicinity of the manifolds.
It does reduce under bonnet temps but can increase exhaust temps under the car (assuming you don't wrap the whole exhaust).
Downsides include the metal work being hotter under the wrap - could cause distortion and cacking, but only if there's something else wrong (I'd have thought). Also if you leave the car outside and rain drips onto the wrap, the manifolds may corrode under the wrap.
Yes I've done it.
I did it with everything in situ using bent pieces of coat hanger (a 'J' shape and a '7' shape) to hook the wrap under the manifolds and fish it out from underneath and back over the top.

But what car are you doing it on?

[jamer]

We have just had this Griffith in with all its exhaust wrapped - not really sure how well it helps as we haven't really travelled that far in it. It does look quite neatly done close up - but I do like the look of the original but totally understand why owners want things to perform better.



Speak to Dom at TVR Power as these engines are his territory and see whether they are going to put it on their supercharger?

Edited by jamer on Friday 23 February 19:46

[Ballistic Banana]

jamer said:

We have just had this Griffith in with all its exhaust wrapped - not really sure how well it helps as we haven't relay travelled that far in it. It does look quite neatly done close up - but I do like the look of the original but totally understand why owners want things to preform better.



Speak to Dom at TVR Power as these engines are his territory and see whether they are going to put it on their supercharger?

Edited by jamer on Friday 23 February 10:01

James, whats that little dial for etc top left of engine bay? Fuel?Brakes?

Forgot to add. You'll get a varied view of pros and cons with Exhaust wrapping and INHO it will be upto what you want to do at the end of the Day.
Yes it can be good and remove heat from the engine bay, some say this just moves it further down the system and can casue heat problems underbody ( near GRP)Debatable. If it is not wrapped well then it can trap dampness underneath when wet and rot the manifolds. Pros obviously the lower underbonnet temps have got to be good for the engine performance and logitivity of nearby parts..engine mounts,bushes etc

BB

Edited by Ballistic Banana on Friday 23 February 14:50

[oggs]

BB looks like a fuel regulator to me

[Ballistic Banana]

oggs said:

BB looks like a fuel regulator to me

Aha yep your probably right Biker Dude

BB

[tvr keith]

I wrapped the exhaust manifolds on my Rover V8 engined Cobra. Whether it was holding moisture or whether the extra heat trapped in caused it I don't know, but both manifolds fractured.
I didn't wrap the replacements........

[Tangoed]

you could always get a ceramic coating on the manifolds, much more efficient and a far better job.

[Tork@TIV]

Tangoed said:

you could always get a ceramic coating on the manifolds, much more efficient and a far better job.

There's a place in Warrington, Cheshire that does ceramic coating. Can't remember the name though. But I know a man who does.

[CHEF_GOLF]

IT IT A 93 4.3 CHIMERA IT HAS STAINLESS MAINFOLDS AND Y PEICE (DE CATTED) AND DOWN PIPE, ALONG WITH STAGE 3 HEADS MARK ADDAMS CHIP BETTER INDUCTION AND A FEW OTHER PERFORMANCE MODS IT ALSO HAD A FULL ENGINE REBUILD ABOUT 8K MILES WITH NEW PISTONS, CAM VERNIER AND PULLIES.
WILL THE WRAPPING AFFECT ANYTHING ADVERSLEY AND DO YOU HAVE ANY TIPS ON HOW TO DO IT .
CHEERS

Griffter said:

CHEF_GOLF said:

HI I AM PLANNING TO WRAP MY EXHAUSTS, IS IT A GOOD IDEA, DOES IT MAKE ANY DIFFERENCE TO UNDER BONNET TEMPS OR PERFORMANCE , ARE THERE ANY DOWN SIDES, HAS ANYONE DONE IT, AND FINALLY HOW DO YOU DO IT. HELP
ALSO DOES ANYONE HAVE A GOOD INSURANCE COMPANIES DETAILS AS MINE IS CURRENTLY SORN AND NOT INSURED AND I AM AFTER A COMPETATIVE QUOTE FOR LIMITED MILAGE.
CHEERS ]

It's a good idea if you need to get heat away from the engine bay in the vicinity of the manifolds.
It does reduce under bonnet temps but can increase exhaust temps under the car (assuming you don't wrap the whole exhaust).
Downsides include the metal work being hotter under the wrap - could cause distortion and cacking, but only if there's something else wrong (I'd have thought). Also if you leave the car outside and rain drips onto the wrap, the manifolds may corrode under the wrap.
Yes I've done it.
I did it with everything in situ using bent pieces of coat hanger (a 'J' shape and a '7' shape) to hook the wrap under the manifolds and fish it out from underneath and back over the top.

But what car are you doing it on?

[CHEF_GOLF]

ANY TIPS ON HOW TO WRAP , IE HOW MUCH OVER LAP ETC
CHEERS

jamer said:

We have just had this Griffith in with all its exhaust wrapped - not really sure how well it helps as we haven't really travelled that far in it. It does look quite neatly done close up - but I do like the look of the original but totally understand why owners want things to perform better.



Speak to Dom at TVR Power as these engines are his territory and see whether they are going to put it on their supercharger?

Edited by jamer on Friday 23 February 19:46

[oggs]

[CHEF_GOLF]

i take it that the heat is transfered down the exhaust , is there anything that can be damaged down there, obviously the fibergalss on the underside of the car but anything else
cheers

V-GOM said:

Be careful, partial wrapping will only transfer the heat elsewhere.

[whatever]

tvr keith said:

I wrapped the exhaust manifolds on my Rover V8 engined Cobra. Whether it was holding moisture or whether the extra heat trapped in caused it I don't know, but both manifolds fractured.
I didn't wrap the replacements........

Well... I'm no materials scientist, but the manifolds radiating heat is cooling them (relatively speaking). Insulating them with the wrap keeps all that lovely heat in, inevitably increasing the temperature of the metal. I'm assuming here that there *is* some cooling effect by them radiating heat - it's hard to imagine there isn't.

So - given that the manifolds crack anyway after a while (on the cerb, at least) it might be reasonable to assume that wrapping them is going to increase the heat exposure and accelerate the heat stress damage.

I think.

Otherwise it'd be a great idea.

In fact, I remember when Mark Evans (him off the tele) built his helicopter, the exhaust manifold on that was all wrapped up to prevent heat transfer to adjacent "stuff". Perhaps the wrapping thing has to be done to manifolds designed to take the added heat?