To Wrap or not to Wrap
#1
It Just Feels Right
Thread Starter
To Wrap or not to Wrap
I'm a newbie(dummass) and I'm putting my remanufactured engine back together.
I bought Exhaust wrap. the kind they use for headers and I wrapped the exhaust section of the turbos and installed the heat shield over it. I'm thinking this will lower the under hood temps considerably. Do you think this is a good approach or do you think it will cause the turbos to fail prematurely from excess heat?
Has anyone tried this? It's not too late for me to remove it if the consensus is it's a bad idea.
I bought Exhaust wrap. the kind they use for headers and I wrapped the exhaust section of the turbos and installed the heat shield over it. I'm thinking this will lower the under hood temps considerably. Do you think this is a good approach or do you think it will cause the turbos to fail prematurely from excess heat?
Has anyone tried this? It's not too late for me to remove it if the consensus is it's a bad idea.
#2
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I'm guessing it won't help much, but it certainly won't hurt. The turbos should already be armored in heat shields, so most of the heat there will be pulled through in the exhaust flow, and the rest is conducted through the engine block, turbo coolant passages and oil passages. None of that should be slowed by the exhaust wrap.
You definitely want the sheilds there because things like splashing rainwater would make short work of a hot manifold.
Dave
You definitely want the sheilds there because things like splashing rainwater would make short work of a hot manifold.
Dave
#3
Eats, Sleeps, Dreams Rotary
I am still breaking in my engine but had it without a wrap and added one about 2-3 weeks ago.
Really no noticable difference in engine heat or cabin heat that I can tell. Though I suspect that a temp gun would notice a couple degrees difference. It does "somewhat" deaden the sound of the downpipe though (less "tingy"). I say if you have it and the engine is out....go ahead and wrap it. Can't hurt. There are some thread that if your DP is mild steel that there is a potential for rust with the wrap on. Otherwise, go for it. And about the chances of turbo failure, I highly doubt it. Just think how much heat the stock DP with precat was generating. A wrap is certainly not as bad as that don't you think?
Really no noticable difference in engine heat or cabin heat that I can tell. Though I suspect that a temp gun would notice a couple degrees difference. It does "somewhat" deaden the sound of the downpipe though (less "tingy"). I say if you have it and the engine is out....go ahead and wrap it. Can't hurt. There are some thread that if your DP is mild steel that there is a potential for rust with the wrap on. Otherwise, go for it. And about the chances of turbo failure, I highly doubt it. Just think how much heat the stock DP with precat was generating. A wrap is certainly not as bad as that don't you think?
#4
It Just Feels Right
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Originally Posted by 7racer
Just think how much heat the stock DP with precat was generating. A wrap is certainly not as bad as that don't you think?
#6
Rotary Freak
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Originally Posted by mibad
Good point, although I don't have a down pipe yet. I may leave the precat on until it makes it thru inspection and I actually have tags on the car.
Edit. I see that you were talking about inspection, not just emissions, so maybe you will want the pre-cat for the visual...Sorry.
Last edited by Cgotto6; 06-16-05 at 06:49 PM.
#7
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Originally Posted by Cgotto6
You can still pass emissions with just a main cat. The pre-cat is just for warm up.
Edit. I see that you were talking about inspection, not just emissions, so maybe you will want the pre-cat for the visual...Sorry.
Edit. I see that you were talking about inspection, not just emissions, so maybe you will want the pre-cat for the visual...Sorry.
Dave
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#8
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Originally Posted by dgeesaman
I'm guessing it won't help much, but it certainly won't hurt. The turbos should already be armored in heat shields, so most of the heat there will be pulled through in the exhaust flow, and the rest is conducted through the engine block, turbo coolant passages and oil passages. None of that should be slowed by the exhaust wrap.
You definitely want the sheilds there because things like splashing rainwater would make short work of a hot manifold.
Dave
You definitely want the sheilds there because things like splashing rainwater would make short work of a hot manifold.
Dave
Good friend of mine made a small blanket out of the wrap material and just laid it over the heat shield (between the turbo's and the Y-pipe) you wouldn't believe the difference. If he's wrapped it under the shields it should work just as well if not better. Jack
#9
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Originally Posted by CantGoStraight
Dave,
Good friend of mine made a small blanket out of the wrap material and just laid it over the heat shield (between the turbo's and the Y-pipe) you wouldn't believe the difference. If he's wrapped it under the shields it should work just as well if not better. Jack
Good friend of mine made a small blanket out of the wrap material and just laid it over the heat shield (between the turbo's and the Y-pipe) you wouldn't believe the difference. If he's wrapped it under the shields it should work just as well if not better. Jack
Well I have my turbos going back on now, and some extra wrap, I think I'll try it myself. If I want to remove it later I can just take off the heat shields and cut loose the wrapping.
Dave
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Tom made me a pattern for making (laying out the strips of wrap) his little blanket just lays right on top and drops down a bit towards the LIM. I have to admitt I was surprised at what a difference it did make. I haven't done mine yet as I have a set of Pettit high flow's going in sometime soon. Jack
#13
not too sure about the drop in temperature, but I can rest my hand on my downpipe (single turbo setup) now that it is wrapped. If you don't pay too much for the wrap, and the parts are off of the car then I say go for it. I did my downpipe, and the runners on the resonated midpipe.
#14
silver ghost
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i'll tell you what.. I wraped my downpipe a while ago and the stuff began to dry rot so i pulled it completly off.. I cant believe how much warmer it feels in the cockpit! I dont know maybe its the hotter weather but i'm going to rewrap it!
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Wrap....definately, if your wrap is rotting you can also spray the wrap with hi heat temp paint (black or silver) and this will help keep contaminates from soaking into the wrap. You can still put your hands on the wrap after a spirited run and not get burned. This may help the rotting problm. Jack
#16
sdrawkcab
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Originally Posted by G's 3rd Gen
i'll tell you what.. I wraped my downpipe a while ago and the stuff began to dry rot so i pulled it completly off.. I cant believe how much warmer it feels in the cockpit! I dont know maybe its the hotter weather but i'm going to rewrap it!
Were did you get the wrap you used?
What brand?
Ebay stuff?
How long before it went bad?
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