Exhaust wrap/turbo wrap?

[CHolman]

I'm going to be putting a new turbo on my truck next week and was wondering if exhaust wrap around the exhaust side of the turbo would be worth putting on? I know it keeps the heat in and things under the hood cooler, but is there any other advantages to having wrap on your turbo? Thanks... .

 

[1965LONEWOLF]

I Would Like To Know Also.

 

[HighRanger]

I was thinking about doing the same thing with mine when I install the new one.

 

[lmills]

Any heat that is contained inside the exhaust turbine of the turbo will aid in efficiency and performance. That is one of the reasons why the hot pipe between turbos on twin set ups are wrapped.

 

[1965LONEWOLF]

can you buy a turbo bag ? or something thats wraps the turbo like a blanket ?

 

[Eric_B]

I have seen this product advertised before in many magazines and online but do not know anyone with it. http://www.thermotec.com/products/full/15001/15001.html

Curious about this myself.

 

[drury]

Check out these guys:



http://www.atpwrap.com/dodge_ram.htm



They sell stuff for both the 2nd and 3rd gen dodges as well as full up custom racing applications. I have an appointment with them this Wednesday, for the full quiet kit plus a custom exhaust wrap.

 

[Forrest Nearing]

it will reduce the lifespan of the steel/iron that it's wrapped around

 

[Bob4x4]

it will reduce the lifespan of the steel/iron that it's wrapped around

But it will preserve the firewall insulation. At Glamis i put out the smoldering firewall insulation on a hot rodded 12 valve after a few passes up the race hill this wk-end. I have had the wrap on my 12v for a number of years,pulled it off to inspect and the pipe and turbo appear fine. My firewall is too. :-laf



Bob... ... ... . wrapped and happy

 

[NoSeeUm]

But it will preserve the firewall insulation. At Glamis i put out the smoldering firewall insulation on a hot rodded 12 valve after a few passes up the race hill this wk-end. I have had the wrap on my 12v for a number of years,pulled it off to inspect and the pipe and turbo appear fine. My firewall is too. :-laf



Bob... ... ... . wrapped and happy

Yeah huh...



My downpipe is double header tape wrapped and I have a really ugly small piece of 2200F lagging thrown over the top turbine to protect the cowl wiring.



Around here, (where I work) just about anything that gets above 140F gets insulation put on it. We have probably a few miles of insulated pipes among other stuff that gets very hot.



I am not sold that insulation causes cracking by itself. Thermal cycling and stress fatigue maybe I can understand. I believe most cracking occurs due to rapid cool down. So possibly the outer surface staying hotter due to the insulation while the inner surface is cooled might be what Forrest is talking about. Just kind of seems wrong is all.



I am interested in this thread, because what I am using on my turbo is so darn ugly while at the same time works so very well. Keep the comments coming.



Jim

 

[pwerwagn]

Turbines work off of a pressure drop situation as well as exhaust gas velocity. Since you are getting heat transfer to the surroundings (through the manifold) you are loosing some of that energy that is normally used to power the turbine.

The thermal insulation will help with the efficiency and spool of the turbo. By conserving the heat inside the manifold, your exhaust gas velocity will not decrease as much, since the change in temp will be smaller. The increased velocity will allow your turbo to spool quicker.

Also, by keeping the heat in the exhaust manifold higher there will theoritically be more pressure as well. that will make the pressure drop across the turbine higher which will again aid in spool up and performance.



I have heard people complaing about the fact that their EGT's go up due to this, but I think that is actually a good thing. What that is showing you is that heat is being lost through the manifold before it gets to the thermocouple. you are actually seeing a more accurate temperature. Now, if you were more concerned with heat absorbtion by the turbo, maybe wrapping isnt the way to go, but knowing that in our trucks melted pistons are probably a more common problem that turbo failure due to heat, I say wrap away!!!

If you already have a problem with excess drive pressure, the increased Vel might not help things.

hope that helps. .



--Jeff

 

[pwerwagn]

I forgot to mention, when I had mine wrapped, the only drawback I noticed was the fact that it took noticeable longer for the temps to cool down when you wanted to shut the truck down.



--Jeff

 

[CHolman]

Thanks ya'll...

 

[NoSeeUm]

FWIW I have seen one kit only on the internet. But it looks like it is really for a import gasser (small) and not really worth reccomending.



I am hoping to speak to some professional insulation guys pretty soon and see what they can do for me.



Jim

 

[pwerwagn]

Genos sells a Kit...

 

[BILLVO]

At the coal mine I work at we run a fleet of kress coal haulers that run 3516 cat engines in them and have had a couple of catostrophic fires due to oil hose blowing and getting oil on hot turbo. We started putting fire blankets between the hydraulic area and engine and also put turbo blankets on. Since doing this our turbo failure rate has about quadrupled on these trucks. They are water cooled garret turbos and have had to try several different turbo water jacket gaskets. Found some foil looking ones that are holding up finally. But turbo failures are still much higher than before broken shafts and bad seals. But it is a small price to pay versus the million dollar rebuilds caused by fires.

 

[BILLVO]

Genos sells a Kit...

I saw this as a sell out item in their mag about a year ago, But they do not carry the manifold/turbo blanket anymore. All they have is the hood insulating pad and tape.

 

[moparguy]

drury, so how do you like the quite kit?



I'm thinking that rather than a new (or newer) truck, a few upgrades such as the subject kit might be in order.



RJR