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Exhaust Wrapping - a good idea? #655335
10/08/20 04:40 PM
10/08/20 04:40 PM
Joined: Dec 2010
Posts: 60
Germany
Fullhoza Offline OP
Just Getting Started
Fullhoza  Offline OP
Just Getting Started

Joined: Dec 2010
Posts: 60
Germany
So there's many opinions on this matter, and I would like to hear what TM people think about this.
Is wrapping a factory manifold a good idea? I am specifically talking about a 2018 +4. Not that it has severe temperature issues, but I would simply like to have it a bit "cooler in there".
Would the wrapping help? Does it lead to a damaged catalyst because of the higher exhaust gas temperatures? Does it accelerate corrosion? Please share your thoughts!

Re: Exhaust Wrapping - a good idea? [Re: Fullhoza] #655348
10/08/20 05:21 PM
10/08/20 05:21 PM
Joined: Oct 2012
Posts: 179
Wiltshire
R
RJW Offline
L - Learner Plates On
RJW  Offline
L - Learner Plates On
R

Joined: Oct 2012
Posts: 179
Wiltshire
I had a go at wrapping my Duratec Plus 4 manifold In order to more quickly heat up the cat. First run out there was an alarming amount of smoke from the wrapping so I quickly returned home and took it off. I suspect I bought an inferior brand of wrap (on the internet).
Bob.

Re: Exhaust Wrapping - a good idea? [Re: Fullhoza] #655369
10/08/20 07:11 PM
10/08/20 07:11 PM
Joined: Jan 2013
Posts: 808
UK
BuyBritish Offline
Talk Morgan Regular
BuyBritish  Offline
Talk Morgan Regular

Joined: Jan 2013
Posts: 808
UK
Ok so here is what I found and I now wrap all my exhausts

The smoke is due to a little burn off of the lava rock quite normal

The under bonnet temperature will be reduced as the gases remain hotter and are expelled through the exhaust

Now here is the science...

Engines and fluid dynamics come into play and basically...the exhaust gases on a non wrapped exhaust are expelled and immediately the hot gases begin to cool in the manifold and when they cool gases 'get more dense' and this effects the extraction and thus the gas flow .by restricting or resisting flow..

On the other hand a wrapped pipe stays hotter and gases remain hot and therefore less dense and flow is improved...

Also an added benefit is that the 'noise or ring' of the pipes is muffled with the wrap..

I have noticed performace improvements dure to lower under bonnet temps and also hotter exhaust pipes...


Rob Davies
Morgan 3 Wheeler 1934 MX
Morgan Series 1 1947
Morgan +4 1956 TR4
Morgan +4 2000 T16 Rov
Re: Exhaust Wrapping - a good idea? [Re: Fullhoza] #655380
10/08/20 08:29 PM
10/08/20 08:29 PM
Joined: Jul 2020
Posts: 21
Cheshire
F
Fus969 Offline
New to Talk Morgan
Fus969  Offline
New to Talk Morgan
F

Joined: Jul 2020
Posts: 21
Cheshire
Don’t know to much about this but when I was looking at reducing temperature in the engine bay wrapping was an option and ceramic coating was another , + and - corrosion with wrapping, cost with coating but looks good .my situation was different to yours my 3.9 V8 was running hot so I fitted a Mulfab radiator and all is well I also had a TVR chimera 4.5 V8 ,much bigger bonnet and engine bay so I just stuck the number plate on the bonnet as it was covering half the intake and that worked a treat so maybe looking at getting more airflow is an avenue? I’d be interested in your solution if you find one

Re: Exhaust Wrapping - a good idea? [Re: Fullhoza] #655381
10/08/20 08:33 PM
10/08/20 08:33 PM
Joined: Feb 2018
Posts: 94
Belgium Nivelles
Dada Offline
Just Getting Started
Dada  Offline
Just Getting Started

Joined: Feb 2018
Posts: 94
Belgium Nivelles
I have warped the sport collector manifold of my Plus4 GDI not for the performance but for the under bonnet temperature and mostly to keep the sport catalyst the hottest possible ... More hot, more efficient and less issue with the yearly Belgium technical control innocent

Re: Exhaust Wrapping - a good idea? [Re: Fullhoza] #655390
10/08/20 09:41 PM
10/08/20 09:41 PM
Joined: Sep 2009
Posts: 5,380
Köln Germany
Heinz Offline
Charter Member
Heinz  Offline
Charter Member

Joined: Sep 2009
Posts: 5,380
Köln Germany
I can underline what Rob explains. As a consequence of the faster gas flow, more fresh air is also drawn in at the intake, which ultimately closes the circle and provides more power in the mid-range.


'14 4/4 graphite grey
Re: Exhaust Wrapping - a good idea? [Re: Fullhoza] #655412
11/08/20 07:40 AM
11/08/20 07:40 AM
Joined: May 2012
Posts: 953
Devon
Moggo Offline
Talk Morgan Regular
Moggo  Offline
Talk Morgan Regular

Joined: May 2012
Posts: 953
Devon
I have had the manifold of my 1.8 Duratec engine wrapped for over two years now. For all the plus reasons quoted here already and as far as I can see there is no greater indication of corrosion than that which I look upon as normal.


Graham

1.8 4/4 Ivory.
Toyota Yarris
Volvo V70
Re: Exhaust Wrapping - a good idea? [Re: Fullhoza] #655761
12/08/20 04:13 PM
12/08/20 04:13 PM
Joined: Sep 2014
Posts: 2,109
YORK
KEVFITZ Offline
Talk Morgan Expert
KEVFITZ  Offline
Talk Morgan Expert

Joined: Sep 2014
Posts: 2,109
YORK
I wrapped the headers and the down pipe on my 2011 Supersports after advice to maintain heat in the Cat for the MOT.

I t worked..I would normaly have to drive it hard to get the Cat up to temperature and immediatley put it on the emmisions tester.

After fitment Mot passed easily..so no more MOT anxiety !!

It is normal for moisture to burn off on first start after fitment.

I used 58' of 2" wrap.
I recommend using correct stainless clips and not Jubilee clips.


" I LOVE THE SOUND OF THROTTLE BODIES IN THE MORNING " (ROBERT DUVAL IN "APOCOLYPSE NOW " )
Re: Exhaust Wrapping - a good idea? [Re: Fullhoza] #655780
12/08/20 05:04 PM
12/08/20 05:04 PM
Joined: Aug 2015
Posts: 898
A
Arwyn Williams Offline
Talk Morgan Regular
Arwyn Williams  Offline
Talk Morgan Regular
A

Joined: Aug 2015
Posts: 898

One tip I'd like to pass on is that it goes on easier if you keep the wrap damp when installing it.

A plant sprayer filled with water is ideal.

Arwyn

Re: Exhaust Wrapping - a good idea? [Re: Arwyn Williams] #655913
13/08/20 10:17 AM
13/08/20 10:17 AM
Joined: Nov 2015
Posts: 2,702
Yorkshire
CooperMan Offline
Talk Morgan Expert
CooperMan  Offline
Talk Morgan Expert

Joined: Nov 2015
Posts: 2,702
Yorkshire
Originally Posted by Arwyn Williams

One tip I'd like to pass on is that it goes on easier if you keep the wrap damp when installing it.

A plant sprayer filled with water is ideal.

Arwyn


Top advice that, saves on dust inhalation too as for some people the fibres are an irritant, wear some cheap disposable gloves too


Jon M
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