Exhaust Wrap

[cullyguy]

Nice side benefit to wrapping the first 4' of exhaust from the turbo elbow down. fairly substantial reduction in cab noise. I used the 2"x50' roll size of header wrap & it was enough to fully wrap the turbo elbow, exhaust coupling & about 4' down the exhaust pipe.

 

[Sixspeed]

Cullyguy, First off where did you get the header wrap. Also did it have any affect on your EGT or the amount of time it takes your tubo to cool down. I've been wanting to do this myself this is the first time I've seen a post about it.



Thanks, Les

 

[Pogodually]

Wrap

www.summitracing.com at 1-800-230-3030 has it at about $80. 00 or www.jegs.com at 1-800-345-4545 has it for about the same price. Your choice. Or could try a speed shop.

 

[RJ2]

I have not seen any discussion on this in the past , is there a negative on doing this procedure?

 

[Kodiak]

Thermo Tec Racing has a wrap that is very sturdy. I've considered this process myself, but I understand that the main drawback could be early failure in the pipe itself due to retained higher heat and possible rust. Thermo tec has a spray fixer that prevents moisture retention.

 

[WOT]

I've used the tape before on my car (1967 Olds 442). It really makes it easier to work around hot headers.



I had thought about doing it on my truck to reduce engine compartment heat, but wasn't sure how it would affect the turbo temp or how well the exhaust would hold up. I know it would probably increase the flow of exhaust (increased scavenging, air flows over a hot surface more easily), at least in the wrapped part.



Is there any one out there with any time on this setup?

 

[JohnE]

One of the factory options on a Detroit Diesel Series 50 engine is a fully jacketed exhaust manifold and turbo housing. The jacket has a hard shell and does not resemble the soft wrap exhaust blankets we offer. The primary objective of the jackets and blankets in our products is to prevent smoke or fire in the engine compartment in the case of oil spills, leaks, or hydraulic line failure.



-John

 

[R.E. Miller]

Rumors

I thought about doing this or Jet Hot coating my turbine housing, exhaust manifold, and downpipe. But I heard here that the jet hot coating actually retained heat and EGT's took longer to cool. That and price kept me away from the jet hot.



2 cents

Russell

 

[cullyguy]

The wrap I used was made by Design Engineering, Inc. Avon, OH 44011 Phone # 440-934-0800. I bought it here in Spokane at a place called the general store for $36. 99 + tx. This place is a general merchantile type store with a fairly large auto parts section that specializes in muscle car hop up stuff.

Now for the performance. I wrapped the exhaust elbow down, not the turbo itself, I have my pyro probe pre turbo, but I did not notice much extra time to reach 300 before I shut down. Spool up seems quicker & highway egts seems to be down 25 or so degrees. I'm guessing thats because there is less backpressure right after the turbo, now that it's wrapped. I did not give much concern to the life of the pipe as its in a pretty well protected area & moisture won't be much of a problem as my truck never sits for more than a day or so, the rest of the time it sees 300- 700 miles day. It might actually extend the pipe life because the heat / cool cycle won't be as fast now, thus less stress. I used stainless safety wire in several place to secure it and was careful to wrap tight and not overlap more than 1/4" as per the instructions. I figured for under $40 and about an hour of my time, I could afford to junk it if it did not do much or caused some problems. So far all looks well. I'll post more as time passes.

 

[Cooker]

I wrapped my downpipe when I installed my 4" exhaust. My original intent was to keep the heat from the 4" pipe away from the firewall (it's much closer than the stock 3"), but, as has already been mentioned, there are other benefits as well. So after a few suggestions from HEMI-Dart I decided wrapping it was definitely the way to go.



I used the DEI wrap also, and I got it from Summit. I then painted it with DEI protective coating. It seems to be holding up very well, but the true test will be winter.



-Ryan

 

[Cooker]

I forgot to add:



cullyguy,

The magic shutdown number of 300 degrees is for post turbo temps. Almost always (I'd say never, but I'm sure there are some rare occasions) the pre turbo will reach 300 long before post turbo does, it depends on how hard the truck was run.



If I'm playing around , it will be several minutes after my pre turbo probe has already cooled to 300, before my post turbo probe cools that far.



-Ryan