Exhaust wrap/insulation?

[Harry_manback]

has anyone got a wrapped exhaust,
whats the benefits of it.
obviously it stops the bottom of my car getting hot.
is that all its for?

 

[franx]

I think when doing a turbo mod. and such, you use this because things around manifold will get so hot they will start to melt.
No point on standard OEM cars

Look at Ben P 's project car and the nearly finished Rear Wheel Drive clio (CHRIS172RWD ?) , they're using the stuff because of high power goodies

 

[Bash]

lol!
Hot air has less resistance then cold air, if you wrap an exhaust pipe you are insulating it and keeping it hotter. Therefore the less dense the air is going through ur manifold, the less resistance it encounters and the more air you can get through.

 

[franx]

OKay, explain why they're using it

 

[Mark One]

The point of heat wrap (and BTW you tend to wrap manifolds) Is to insulate the manifold.

The two main advantages
1) Lower engine bay temperatures, thus marginally lower inlet temperatures
2) Hotter manifold mean the exhaust gases stay hotter (more energy) and flow faster away from the engine.

Disadvantages:
Some people report that the wrap retains water and then causes the manifold to split at the welds.
Heat wrap will eventually deteriorate and fall off

Better but more expensive method is ceramic coating of the manifold

 

[Mark One]

I think when doing a turbo mod. and such, you use this because things around manifold will get so hot they will start to melt.
No point on standard OEM cars

Look at Ben P 's project car and the nearly finished Rear Wheel Drive clio (CHRIS172RWD ?) , they're using the stuff because of high power goodies

Advantages can be seen on otherwise standard cars.

 

[Bash]

http://www.carbibles.com/fuel_engine_bible_pg2.html

Go to the very bottom of this page read the section on Exhaust Wrap and figure this sh*t out for yourself.

 

[Deep Dish]

The point of heat wrap (and BTW you tend to wrap manifolds) Is to insulate the manifold.

The two main advantages
1) Lower engine bay temperatures, thus marginally lower inlet temperatures
2) Hotter manifold mean the exhaust gases stay hotter (more energy) and flow faster away from the engine.

Disadvantages:
Some people report that the wrap retains water and then causes the manifold to split at the welds.
Heat wrap will eventually deteriorate and fall off

Better but more expensive method is ceramic coating of the manifold

(172 / 182 application not generalising)

Number 1, load of rubbish. It dosent lower temps by that much as a whole plus in anycase, like the open CAF thing, you dont get heat soak / hot standing air in a engine bay once the cars moving so wont make a jot of difference to inlet temp (in the real world)

Dont agree with the rust thing either. Heat of the exhaust / manifold would quickly evaporate any moisture plus the mainfold is located in a 'dry area' so from outside in rusting, very much doubt it

 

[franx]

http://www.carbibles.com/fuel_engine_bible_pg2.html

Go to the very bottom of this page read the section on Exhaust Wrap and figure this sh*t out for yourself.

Bash , we all would like to thank you , really

Reading your post made me want to read the car-bible straightaway ...