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exhaust wrap on the charge pipe

p34ch3y

tastefully modified
Oct 17, 2005
2,879
1
cambs
ok just wondering if anyone has done this?

i was thinking of doing this to mine as the charge pipe strate over the engine and thought this may help reduce intake temps
 
Dec 3, 2007
2,475
0
cardiff
yeah i thought that this would be a good idea. But would the cost of the wrap make it worth it? Thats the question.
 

Fl@pper

Back older greyer and less oilier but always hope
Jun 19, 2001
12,368
25
Gloucester
why keep the intake heat in ?

would have it would be more beneficial to polish it or paint it black - damn which way round was it that lost heat more effectively ??

in fact weld a shed load of big washers round it and direct some airflow over it

works for processors

where's a decent school science geek when you need one ?
 
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olethalb

ibiza gone!!!
Oct 9, 2008
252
0
bracknell
think it's black tbh, heat wrap would insulate it surely keeping heat in.

i know that rough surface dissipates heat far better than polished surfaces.
 

Reuvers

I is a Dutch man!
Oct 30, 2007
3,374
0
Netherlands
ok very easy science for you guys:

black (or anything dark for that matter) is influenced very quickly to temperature changes in its surroundings. This means it heats up very quickly, but will also lose its heat quickly.

Polished surfaces (or anything of light color) take longer to be influenced by the temperatures in its surroundings. This means it heats up more slowly, but retains the heat for much longer.

Homework for tonight class:

Get 2 ice Popsicles . put 1 in aluminum foil, and 1 in for instance a dark trash bag.

The one in the bag will melt much faster.


Class dismissed








:cartman::lol:

;)
 

Fl@pper

Back older greyer and less oilier but always hope
Jun 19, 2001
12,368
25
Gloucester
thats the daddy - too early for me

greater surface area explains it all so rougher is best - hence why most standard ones are roughish cast ali then
 
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andycupra

status subject to change
i think it would increase temps.

i assume you think that the engine will heat up the pipe. Im my experience the charge pipe can be very hot when the engine is not very hot. So im unsure why wrapping it will reduce temps. - unless its designed to disapate heat.. but i believe they are designed to insulate it.

Sounds to me like having a charge pipe polished inside and black/ rough outside may be the way to go..

either than or get a better intercooler.
 

andycupra

status subject to change
Homework for tonight class:

Get 2 ice Popsicles . put 1 in aluminum foil, and 1 in for instance a dark trash bag.

The one in the bag will melt much faster.



;)

your right theory regarding colour is correct; however that is not a correct test as the materials should remain the same for a properly controlled test regarding colour.
If the foil was black and the bag white you may find the ice in the bad still melts faster!
 
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Reuvers

I is a Dutch man!
Oct 30, 2007
3,374
0
Netherlands
your right theory regarding colour is correct; however that is not a correct test as the materials should remain the same for a properly controlled test regarding colour.
If the foil was black and the bag white you may find the ice in the bad still melts faster!

now there is the start of a discussion you don't see often on a forum like this :lol:

but yes you're right material is obviously a big factor too.
 

ttothec

Full Member
Apr 20, 2006
349
0
Reading
i agree that in traffic engine bay temps would go up, so in this case the heat wrap may be an idea to insulte the relatively cold air in the charge pipe, but when driving even at low speeds there is a lot of air coming in to the engine bay through the front of the car.

i guess the only way to know for sure would be to mount a temperature sensor in the engine bay (possibly to the under side of the bonnet) and see what temperatures are shown under different driving conditions

then compare this to air intake temps on vag com

you should then be able to determine if u want the charge pipe to be insutated or conductive. same for the inlet manifold
 
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