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NG900 & OG9-3 Performance, Mods & Tuning Covers Tuning & Performance modifications for the NG900 (1994 to 1998) & OG9-3 (1999-2002) & '03 Convertible

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  #1  
Old 16th July 2007
screamingreen97 screamingreen97 is offline
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Default exhaust wrap

so i wrapped my downpipe with the exhaust wrap....WOW...what a difference...i found my lost boost with it too...my intake temps were at a max of 180 degrees F the other day at idle on the roads...today, i let it idle in the driveway for 10 min....the temp was at 89...then driving, the max was i think 125...and cruising between 108-118....i knew the loss of boost was prob from the heat....im going to further wrap the intake pipe with the reflective stuff from home depot prob later on....but wow...big difference
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  #2  
Old 16th July 2007
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what did you use? do you have any pics?
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Old 16th July 2007
screamingreen97 screamingreen97 is offline
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ummm...i forgot what brand i used, but it was like 35 bux for a 1" by 50' roll....and i still have some left over... ill take pix once i have all the wrapping done with the intake
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  #4  
Old 16th July 2007
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Just a note for anyone considering this- exhaust wrap will hold moisture, so it should only be used on stainless if the car is daily driven.

Jet-Hot or similar coatings are another, more expensive alternative.
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Old 16th July 2007
screamingreen97 screamingreen97 is offline
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Quote:
Originally Posted by redrum
Just a note for anyone considering this- exhaust wrap will hold moisture, so it should only be used on stainless if the car is daily driven.

Jet-Hot or similar coatings are another, more expensive alternative.
the packaging said it lets the moisture out...so i think i got a pretty expensive one lol...name brand...i saw others for like 10 bux, and i was like, nah, ill spend the xtra for the name brand



brand is called: Thermo-tec
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Last edited by screamingreen97; 16th July 2007 at 01:16 PM.
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  #6  
Old 16th July 2007
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Quote:
Originally Posted by screamingreen97
brand is called: Thermo-tec
Yep - that's a good one - right here in Ohio. You can get it at Jeg's (another Ohio company), or Summit Racing (another Ohio company), etc.
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Old 16th July 2007
screamingreen97 screamingreen97 is offline
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Quote:
Originally Posted by Saaboheme
Yep - that's a good one - right here in Ohio. You can get it at Jeg's (another Ohio company), or Summit Racing (another Ohio company), etc.

ya it would have been cheaper through my sponsorship, 15 bux for a 50 foot roll...and its DEI...i just didnt wanna wait like 3 weeks for it to arrive here
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  #8  
Old 16th July 2007
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I wonder...

Being one of the factors of oil sludge the fact that the exaust and catalyst are under the oil pan, wouldn't it be great to wrap that area and insulate as much as possible the catalyst?
Anybody knows if this would affect the catalyst?
I imagine not, as I see turbos and downpipes fully insulated....
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Old 16th July 2007
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Quote:
Originally Posted by fromero
I wonder...

Being one of the factors of oil sludge the fact that the exaust and catalyst are under the oil pan, wouldn't it be great to wrap that area and insulate as much as possible the catalyst?
Anybody knows if this would affect the catalyst?
I imagine not, as I see turbos and downpipes fully insulated....
One other positive thing it would do would be to help speed up the heating of the cat. They only do their jobs when they reach a certain temperature. So, there would be a positive environmental impact. Not sure if this would negatively impact longevity of the cat though. Anyone? Bueller?
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Old 16th July 2007
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did the exhaust wrap smoke? I've had it smoke and smell bad for about a day, and have heard that too from others.

The reflective stuff, I have some, and have been playing with it. Will it really work? My tests have shown that it doeas keep the intake pipe colder, and it doesnt melt. I called and they said it melts at high temp on contact, but an inch away it will be fine, after a week my test strip hasnt melted, scorched, caught fire or slid (contract?, shrink?) So I figure it'll be ok. Now how would I wrap the intake? airbox?
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Old 16th July 2007
screamingreen97 screamingreen97 is offline
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Quote:
Originally Posted by PETER SAABER
did the exhaust wrap smoke? I've had it smoke and smell bad for about a day, and have heard that too from others.

The reflective stuff, I have some, and have been playing with it. Will it really work? My tests have shown that it doeas keep the intake pipe colder, and it doesnt melt. I called and they said it melts at high temp on contact, but an inch away it will be fine, after a week my test strip hasnt melted, scorched, caught fire or slid (contract?, shrink?) So I figure it'll be ok. Now how would I wrap the intake? airbox?
mine has barely smoked...and i wound up with like 20 feet of wrap left over, so i just wrapped the intake delivery pipe with that too...i guess it helps?

im about to go outside and take a couple pix...ill have them up in a few
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Old 16th July 2007
screamingreen97 screamingreen97 is offline
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here they are




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  #13  
Old 16th July 2007
John Z Williams John Z Williams is offline
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Looks good there, I am a big fan of wrap and ic piping wrap. I removed my insulation under the hood too, it all helps to keep under hood temps down. I actually added back the stock 9-3 heat shield over my large turbo and that helps too... It all adds up...

John
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  #14  
Old 17th July 2007
Corn Cob Corn Cob is offline
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I have read in the past(I believe in the C900 forum, maybe somewhere else) that doing this was a big no-no! The reason being that the extra heat causes the metal to oxidize prematurly, and your expensive exhaust bits rot from the inside out. Is this false? I would love to do this but if my sweet downpipe is going to disentagrate I'm out man.
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Old 17th July 2007
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Soooo,

is it possible to wrap the catalyser??
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Old 17th July 2007
John Z Williams John Z Williams is offline
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Quote:
Originally Posted by Corn Cob
I have read in the past(I believe in the C900 forum, maybe somewhere else) that doing this was a big no-no! The reason being that the extra heat causes the metal to oxidize prematurly, and your expensive exhaust bits rot from the inside out. Is this false? I would love to do this but if my sweet downpipe is going to disentagrate I'm out man.
Maybe if you had a mild steel header or something, but the strong cast iron ones we have are very strong! I have been running header wrap for almost 3 years now and its still going strong!

John
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  #17  
Old 17th July 2007
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Quote:
Originally Posted by John Z Williams
Maybe if you had a mild steel header or something, but the strong cast iron ones we have are very strong! I have been running header wrap for almost 3 years now and its still going strong!

John
Concur. The cast iron manifold is a beast. It will take more time than you have on earth for it to oxidize into elemental form. If your DP is SS, then it will not corrode away - the only possible drawback is if the welds are substandard, the additional heat from the wrap could overstress them.
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Old 17th July 2007
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Ok I will give it a go. The exhaust manafold I wasn't worried about, like you guys said it is super heavy duty thick metal. I was just worried about the downpipe, but I guess it would be ok since I have the GSv2.
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  #19  
Old 17th July 2007
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Quote:
Originally Posted by Corn Cob
Ok I will give it a go. The exhaust manafold I wasn't worried about, like you guys said it is super heavy duty thick metal. I was just worried about the downpipe, but I guess it would be ok since I have the GSv2.
I would bet on the GS also - maybe Nick will weigh in here and put all doubt to rest. Corn Cob, how's come you have not responded to our Events post for this weekend in Findley SP?
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  #20  
Old 17th July 2007
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Default The Mummy!

I did my 3" D.P. about 2 months ago. I didn't notice any difference in performance? You can put your finger on the outside of the wrap after a run fairly safely- so it's definitely working.

I went from the 3-bolt turbo connection down to the flex pipe just in front of the cat.

Must do my intake line and try that.
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