Why don't more people wrap the exhaust?

[y-knot]

Think about it. . of coarse it will take more time to cool the turbo down, I just insulated it. The ideal is to keep the heat in the system, use more of thermal energy to drive the turbo, more boost and less lag. The heat is there and free, it is a by-product of the combustion. By insulating, you get to use a little more of that heat. I stated earlier that I have a turbo timer are ready installed, This will automaticly ideal the truck to a pre-set time, and there fore compleat the cool down. The bearing that supports the turbo will see more heat, it's nothing more then it has seen in the past. Also, anyone that has any vehicle that uses a turbocharger should use synthetic oil, it is proven, offers more protection, and is affordable. Too not use synthetic's in this age and time, is foolharted... .

 

[bulabula]

Y-knot, is it possible for you to take under-hood temp readings before and after the wrap? I'd like to see some hard data. A sensor somewhere near the turbo would probably be best.



My Emergency Diesels Generators were wrapped to control heat since they were in manned spaces; and boat engines may be wrapped as well. But I would think there is enough airflow in our engine compartments to keep the wrap from passing a cost-benefit analysis.

 

[mediccummin]

I just installed a exhaust blanket, mainly to cover up my ugly rusted exhaust manifold and turbo which is new but already rusting. My cool down time decreased by a minute or so, I contribute this to cooler under hood temps. I figured my afe was sucking in the under hood hot air along with the cooler outside air, with the blanket I'm getting more outside air. I tested this out a couple days ago by taking the blanket off and putting in back on during cool down with in the same time frame. It did cool down faster with the blanket on, outside temp was around 90. I was thinking of wrapping my exhaust down pipe mainly for noise purposes but not sure yet. The blanket also cut down some of the engine clatter.

 

[John]

ATP

I added (one piece at a time) three customized ATP blankets on my Ram:



Oil Pan Blanket



Exhaust Brake/Down Pipe Blanket



Exhaust Manifold/Turbine Housing Blanket



The quality of these items is amazing! They fit great, sigificantly reduce engine noise, and reduce under hood temps. very nicely.



Yup, I'm a happy camper!



Next up...



a custom ATP hood blanket!

 

[Vaughn MacKenzie]

Re: ATP

Originally posted by John

Next up...



a custom ATP hood blanket!

John, when this happens it will be a "must see. "



Vaughn

 

[y-knot]

You need to stop thinking like a bean counter... . who cares about cost analsis?? You will never save enough fuel with your diesel be recoup the extra money you sent. Wouldn't it have been ashame if Cummins would have let the bean counters influance their design?? They could have saved a bunch of money designing the engine parts to hold just at the power they rated them for. I have a rod siting here, and I bet it is atleast 3 times heavier then it has to be. Thankfully they built their parts to last, and to take far more punishment then they rated them to take.

Will I ever recoup the money I spent to insulate, isolate, and improve performance?? Know. Nor will anyone else, for any part, accessory ot gadgit they bought. Once the money is spent it is go for ever. But the real question is, Did the result, the purpose for which You spent the money, make an improvement by performance, power or comfort?? It to earily now to answer, but I fully expect it to make a huge differance in the comfort catagory. And I feel it will add in power and performance.

I to would like to see some evidence of a change, and I will take some measurments after it is done. I have two EGT gages, pre and post turbo, and have documented the findings before instalation. I also have taken several underhood temps with a inferred heat gun, and I also have a gage to monitor the intake air temp. I do not have a noise meter, so that will just have to be my subjective thoughts, those along with them of my wife's.

My intention is to lower the interior sound level. I like the exhaust note, and the truck sounds good, but I want less drone and inside noise. So the best way to accomplish that is to add matterials in issolated places that will absorb the sounds. And while I am at it, I will also work on removing as much heat from the cab as well. The turbo lives off heat, so it only makes sence that insulating the system will help. The turbo will get all the heat produced by the engine, which will inturn give more power. And by insulating the system, the under hood temps will drop, and that makes more power by lowering the temp of the air injested by the turbo, not to mention the less wear and tear of other parts and batteries (lower temps).

I will let you know how it comes out. Today I got the areo muffler heat /sound sheild built and installed. I also insulater the AFE intake mount, and got 2/3rd of the cab floor done. The rest of the floor will get done tomarrow when the rest of the insulating mat arrives. I know it will work, I started the truck and ran it for awhile, mainly to let some of the pieces get hot and let them set. There is allready a huge differance in the interior soudn level which is good. On the outside that too has gotten quieter.

 

[John]

Vaughn, I have a few special tricks up my sleeve to go along with the new ATP hood blanket.

 

[Peter Campbell]

I do not think the cost benefit comment was meant to slam anyone. If it had passed the cost benefit- it would be a factory option. It is just an observation. Someone recently asked me why I bought ANOTHER truck-- Because I can afford it and I wanted it. It is part of many buying decisions. That is the only answer that anyone needs. If every mod/option had to pass the cost benefit- All our stuff would look like russian ( old soviet ) consumer good. Whatever color you want- as long as its grey. Here is our floor model with all the options. Exactly the same as the base model.

 

[Evil Otto]

i wrapped my exh. years ago. this is what i can tell you. i wrapped my ats manifold, both sides of the turbo and wrapped the whole 4'' down pipe when i put a 5'' exh on. also had a blanket wrapped around the turbo exh. housing and ats. i mean it was realy was wrapped tight. it took a lot of time to get it wrapped around ats. i used safety wire ti do this. i did the down pipe off the truck and used a large exh band clamp to hold it on. this is what i gained 3 lbs of boost and lost a lot of turbo lag out of the hx 40. it was so well wrapped you could run it real hard 1400 egt and touch the down pipe. it really keep the heat energy in and made a big differenced. only problem i had with it was when i had to take it off after a blown head gasket it all fell apart. and i have not had time to replace it yet. like i said it takes a lot of tome to wrap it right.

just my . 02



ED

 

[jandtjil]

Posting on an older thread in case someone is interested.
I just removed my stock exhaust which was wrapped to the end of the muffler, I did not have significant corrosion, which I credit to thoroughly coating the wrap with high-temp silicon spray/paint.
After seeing that, I wrapped/sprayed the new 4" MBRP downpipe.
I buy my wrap from Hamilton Marine MANIFOLDS Will probably finish wrapping once I find a bit quieter muffler.
JJ

 

[Crazy Horse]

Why would you ever want to make it quiet

That's what I was wondering .

 

[HEMI®Dart]

I always wrap my downpipe. Removed the old down pipe that was also wrapped. No signs of corrosion what so ever.

 

[BullyDogJason]

I want to try out a turbo blanket.



this is a local guy that makes them

Turbo Performance Products

 

[RACE427]

I would agree 100%. Every exhaust system I have wrapped was destroyed by excessive heat and moisture. The steel turned to rotted out rusted junk in a very short amount of time. Race car and truck teams can afford to do this as they seem to have almost unlimited deep pockets of funds. lol. Besides they don’t drive their race vehicles on an everyday basis in all types of weather.

 

[moparguy]

I would agree 100%. Every exhaust system I have wrapped was destroyed by excessive heat and moisture. The steel turned to rotted out rusted junk in a very short amount of time. Race car and truck teams can afford to do this as they seem to have almost unlimited deep pockets of funds. lol. Besides they don’t drive their race vehicles on an everyday basis in all types of weather.

My guess is location has a big impact on exhaust system life. I'm in the South, no salt on the roads (usually). On the first page of this thread I commented (back in 2004) on my wrapped exhaust system.

No problems then, Still no problems and it's been in place for about 15 years.

RR

 

[AH64ID]

Old thread!!

I've had TPP blankets on my manifold/turbo for 7 years now without any negative indications on the metal. The EGT's do take a little longer to cool down, they run a hair higher while cruising, and cooler while WOT. I got a psi or so more boost out of the blankets too. The main reason I added them was to keep the under hood temps down. I do a lot of slow speed towing where EGT's are 900-1100° and the airflow is low when the fan isn't engaged.. which is most the time because the fan doesn't come on until the thermostat is fully open and that takes some sustained power above what I am making most the time.

I also used exhaust wrap on my down pipe down past the transfer case to keep the heat off the transmission/transfer case in those same slow speed towing applications. I inspected my exhaust pipe a couple months ago and it looks the same under the wrap and away from the wrap.

The exhaust gets hot enough to keep the blankets/wrap dry most of the time. Maybe it's the drier environment I live in, but I don't see it as being an issue at least not more of an issue than the lower temps I get radiating from the exhaust.

 

[RACE427]

Sorry, never considered those who live down south or in SoCal, guess you do not have any rust issues. Up here, on a quiet night you can hear your truck rusting away !! lol

 

[Bob4x4]

I too wrapped my down pipe on my 94 it’s been on for all but maybe 2 years,with the bigger turbo it was VERY close to the floor.Helped in a few different ways

 

[Regcabguy]

Sorry, never considered those who live down south or in SoCal, guess you do not have any rust issues. Up here, on a quiet night you can hear your truck rusting away !! lol

Neil Young was right. Rust never sleeps.