Exhaust wrap ?

B

Bluesim

New Member
Hi!

1.4TDI 55kW

Was wondering if any of the knowledgeable folk here could tell me if wrapping my exhaust would improve fuel efficiency/performance. Especially in winter where it is often -10 to -20 C where I live. Can't seem to get a straight answer out of Google on this one. I also searched here and didn't immediately see any threads on this subject. If this has been thoroughly dealt with long ago please point me in the right direction. If not, has anyone done this? If so, what were the results?

Thanks

Dan
 
Try asking on a site with similar temperature. More chance they will have a better idea how to solve the issue.
 
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Potentially there could be some benefit in insulating the manifold to maximise thermal energy of the exhaust into the turbo.
After the turbo I suspect cool exhaust gas will result in lower back pressure which is better for performance so no benefit in wrapping the exhaust from the turbo to the tailpipe.

Cheers Spike
 
@Bluesim - we are in the same situation, temperature vise, and if I reed you correct, between the lines... you are searching for simple and cost effective ways to gain BHP's one can manage to do without too sophisticated methods, right?

What @spike is sharing is fully compliant to what you can reed in the "Blue Book" from Bosch.

Enigine compartment temperatur and Inlet/Aftercooler systen temperature is something that I started a small project on in august, after reading the brilliant thread by @timmus TDI120 . He has used ceramic coating on some of the bolted engine parts, which will be much easier than to wrap, to my opinion.
The first set of temperature readings I did was a disaster due to that my IC was leaking.... so I have to start from scratch. though I am quite convinced that the temperature variation measured on the top face of outlet manifold at syl #2 is very limited, (even with a well sealed IC...) between +15 until -5 degC with skidplate fitted. One of several reasons for that is probably that the outlet manifold is located "behind the hot engine and most of the cold air will have to pass the hot downpipe and turbo area.

If you can find an easy way to cool down the IC pipework.. you will gain more bhp compared to outlet manifold wrap.

Cheers
dieselfan
 
One easy way must be to close/remove the EGR? IC and EGR is a strange combination..

Also the surface of the IC is primarily covered by the frontend, so assume the efficieny of the IC is limited/obstructed.
 
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