Why don't more people wrap the exhaust?

[y-knot]

Just wondering, with the apperent gains in thermal efficency, lower under hood opperating temperatures, and sound deadening, afforded by using products like Heatsheild Exhaust wrap, why hasn't their been more post about them and more people try it?

 

[Chipstien]

Any idea what it would cost to wrap a 5 inch exhaust from front to back.

 

[csutton7]

a lot

 

[Chipstien]

Originally posted by csutton7

a lot

LOL. Straight to the point. Well this would be the reason that I haven't done it.

 

[Chipstien]

What gains can I expect in HP..... nuff said.

 

[jmeehan]

Something else to remove before I can work on it. I also worried about vibration and chafe.

 

[jandtjil]

y-knot The clamps I used were _rap, if I need to tighten it up/replace a section I will use reg automotive hose clamps next time.

Add in $10 or $15 for a can or two of high temp silicone also, it coats the wrap, supposedly makes it more weather resistant.

As for gains in efficiency, I didn't notice any. It may have added a small amount of noise reduction.

If you have access to a vehicle lift it makes wrapping a bunch easier.



JJ

 

[RACE427]

exhaust wrap

Every ehaust system which I have wrapped or have seen wrapped was rotted out from excessive heat and the retention of moisture in the wrap material. There is power to be gained but at the expense of shortened pipe life.

 

[moparguy]

I wrapped from the turbo to a point under the back of the front seat. It did make a noticeable difference in noise, but I'd already taken several steps to lower the overall noise level in the cab, making addditional small reductions noticeable.



On a stock truck, you might not detect any improvement.



RJR

 

[banzaitoyota]

I have had similiar experience on wraps (rotting out) on gassers

 

[shakey]

Why would you ever want to make it quiet:--)

 

[Ncostello]

Wonder if I should remove the wrap that the factory put on our new (in 2000) fire truck. Its got an ISC and was wrapped from the turbo to the muffler about 4' behind the engine. Its a cab over custom truck so I imagine they wanted to keep the heat away from the cab interior as much as possible.



You'd think any moisture that collects on the wrap would be vaporized in short order when ran.

 

[jimk]

Fire blanket

I have rolls of fire blanket that was given to me. That can be used to wrap the exhaust, however doing so elevates the temperature of the exhaust to shorten it life. There are all kind of ways to insulate the exhaust. I like the blankets that are hand made to go around steam piping. Jim

 

[y-knot]

Oh well, sence it seams like a good ideal, and I can not foresee any real negative I will just try it myself.

I decided to go with Thermo Tec, Cool It line of wraps and blankets. I purchased the turbo wrap kit, very much like the one posted here, it will cover the turbo and down tube. I bought some 1" and 2" header wrap to allow me to cover the from the turbo base to the first muffler (aero). I know some have posted about wraps rotting out the pipes, but I have stainless steel and this is exactly why I paid the extra money. I will coat the wrap with a aluminum Hi-Temp paint they sell, it helps preserve the wrap and looks nice doing it. I also will add two aluminum heat sheilds, both will mount over the top of each muffler. I will add a layer of Hi-Temp sound deadining matterial called Cool-It insulating mat. And then place a layer of the Cool-It heat sheild or the insulating mat. The ideal behind this is to absorb as much noise as possible and re-direct the heat coming off the mufflers.

For the cab, I'm placing a layer of Cool-it Insulating mat under the carpet, this will reduce heat and noise transmitted to the interior hopefully.

Up front in the engine bay, I will fashion a cover for the manifold out of their heat barrier mat. This will cover the top and down the sides of the exhaust manifod, with the hope of keeping the heat generated thru use contained to the manifold area and lower the under hood temps.

While I am at it, I will add the Cool-It Thermo Sleeves to the AC lines, the factory covered a small portion where it snakes by the turbo, but I don't think they went far enough. I will cover both of them for 100% coverage. I am also adding the Cool-it Air-Tube heat sheilds , to the intercoller in and out tubes. The ideal being to limit the transfer of heat to the intake air charge, this should be a big help and a cooler intake air temp means more power. There Thermo sleeves will stop 98% of the heat transfer, and I will use them to cover 100% of the plumbing from turbo to intercooler and from intercooler to intake. All the sleeves are easily removed if service is ever needed, and they have a aluminized covering which makes keeping thing clean and tiddy no problem. I should be starting on the project by the end of this week, I ordered everything yesterday.

I will also fashion a aluminum heat sheild and cover it also for the transmission. I want to redirect the heat from the down tube where it makes it's first bend by the transmission and it's lines. There is alot of needless heat being conducted to the trany there, and I am sure this will help.

 

[Mtngoat]

Y-Knot,



I heard that wrapping holds in moisture and advances corrosion (rust). I don't know if thats true or not, someting to think about, I guess. .



Robin

 

[FDziurda]

ATP Wrap

I've had the ATP Wraps on my Turbo and downpipe for a couple of years and had no problems. When I recently removed the "wraps" to work on my Pacbrake, I did not notice any degradation in the turbo or downpipe. Yes, it does get hot under the wraps, but have not seen any indication that it is rusting or that moisture has caused a problem. The exhaust passing thru the inside of the pipe has a far greater effect on the temperature of the downpipe and turbo than that of the outside air would have.



Oh yes, and it IS noticeably quieter... .



Frank Dz

 

[y-knot]

I'm not worried about moisture, I have a stainless steel exhaust and do not think it's a problem. All my other mods will be a mixture of blankets, covers or sheilds. Besides if everyone is happy with the way things are now, a does nothing to effect change, It would get pretty boring.

 

[y-knot]

Thanks fro the info, but like you stated it was a little biased. It may take it's tool on headers, every add for the wraps states it will void most warrantys, but I do not have a header. I can not see were it could cause any damage, no surfaces to warp and the down tube is shaped nothing like a hearer tube, just 4" in diameter and streight. These trucks make alot of heat, and the more you fool with them the hotter they get. I will just have to see, I think I have a better then average chance of seeing a real improvement. I know the principals are sound, and that suggest it will work. Of-coarse there are a few draw-backs, the turbo will need more time to cool down, the insulation at that point is working aginst you. I have already installed a turbo timer, and I already use synthetics. The added insulation to the intake has no draw-backs, it is easy to remove in time of service, and durable enough to re-use. It is not a header wrap, but a heat barrier in the form of a sleeve. Besides I had nothing better to do, and the 600. 00 was burning a hole.

 

[y-knot]

I bet you could!

Today most of my stuff got hear from Jeggs. I got both intercooler pipes done, made the turbo cover, as well as the down pipe and the pac-brake. I kind of over bought, but whats new, so I'll have plenty extra. On the down tube, I went a different route, instead of using the header wrap in the normal fashion of over lapping layers. I took a large peice of thermo blanket, one that had both sides aluminized, and fastened to the inside a layer of wide header wrap. The combo worked very well, I get the protection I wanted plus the nice looks and wear of a more durable outside covering. I also got the AC lines covered from compressor to tank, and from tank to firewall. Friday I'll tackel the in side, with the insulation goping under the carpet. Hope to have some pics soon.

 

[fortunate1]

exhaust wrap

Will wrapping the turbo lengthen the time needed for idling/cooldown before shutting off the engine? You don't want to bake the oil in the turbo's bearing, whether it's dino or synthetic. If you have guages, post if the cooldown takes longer or isn't affected by the wrap.