Wraping Dp question
#33
John Dillinger
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there is 2 different wrap that Dei selling. so which one you guys use to wrap it?
Titanium Wrap with LR Technology
http://www.designengineering.com/pro...sp?m=sp&pid=95
and this:
Exhaust / Header Wrap
http://www.designengineering.com/pro...asp?m=sp&pid=9
so which is which..? anyone ?thanks
Titanium Wrap with LR Technology
http://www.designengineering.com/pro...sp?m=sp&pid=95
and this:
Exhaust / Header Wrap
http://www.designengineering.com/pro...asp?m=sp&pid=9
so which is which..? anyone ?thanks
#34
Senior Member
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^^^^ good ? i saw the same thing when i visited the site. i would like to know if anyone has any experience with the new stuff, or if they are just jumping on the titanium bandwagon to sell my product.
#35
Cheap Bastard
iTrader: (2)
I don't know the physics about improved performance from wrapping. It doesn't make any sense to me that there would be a measurable gain. However, I will take your word that it does do something.
#39
Racecar - Formula 2000
Correct - you want to use all the energy (heat & pressure) you can in the turbos, not dissipate or expel it afterwards. However, wrapping is not in vain - it keeps everything surrounding the pipe cooler, including the engine compartment.
#40
Talk to me....
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I still don't understand how wrapping your dp has anything to do with what thewird or Dave w are saying. Keeping heat (exhaust energy) in the dp (by wrapping or coating it) only serves to increase velocity which reduces backpressure in the manifold which makes your turbo more efficient. Agree?
#41
Recovering Miataholic
Wrap the Recommended Direction! (Don't ask)
Bought my thermal wrap online, here. The 15-ft roll was barely sufficient for my 3" Bonez S/S DP. I didn't coat either the old wrap (which ripped off eventually) or the new one. No indication of bad effect on the DP from the old wrap.
Higher heat in the exhaust pipe raises the pressure of the gases leaving the engine. The increased pressure of the gases does increase their exit velocity. But the increased back pressure is not desirable. This is why one goes to a larger diameter pipe... to decrease back pressure. It's not really velocity that is a driving factor... for minimum back pressure the exhaust port would be open and not exit into a pipe, and the velocity of the exit gases would drop extremely fast once out of the port. There would be zero back pressure and the turbos would be as happy as possible.
Higher heat in the exhaust pipe raises the pressure of the gases leaving the engine. The increased pressure of the gases does increase their exit velocity. But the increased back pressure is not desirable. This is why one goes to a larger diameter pipe... to decrease back pressure. It's not really velocity that is a driving factor... for minimum back pressure the exhaust port would be open and not exit into a pipe, and the velocity of the exit gases would drop extremely fast once out of the port. There would be zero back pressure and the turbos would be as happy as possible.
#42
Lives on the Forum
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I still don't understand how wrapping your dp has anything to do with what thewird or Dave w are saying. Keeping heat (exhaust energy) in the dp (by wrapping or coating it) only serves to increase velocity which reduces backpressure in the manifold which makes your turbo more efficient. Agree?
Wrapping the downpipe is generally a good thing though as it keeps heat away from other things, however it has nothing to due with velocity.
thewird
#44
Talk to me....
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The TURBO hotside velocity is increased due higher pressures as a result of keeping the heat in the TURBO. Creating higher pressures in the downpipe due to extra heat is will REDUCE TURBO VELOCITY which is the opposite of what you would want.
Wrapping the downpipe is generally a good thing though as it keeps heat away from other things, however it has nothing to due with velocity.
thewird
Wrapping the downpipe is generally a good thing though as it keeps heat away from other things, however it has nothing to due with velocity.
thewird
My main arguement here is that wrapping or coating your downpipe will have ZERO negative effects on manifold backpressure.
#45
NizzleMania Productions
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so the lesson of the story...
Wrap the DP to protect everything else in the engine bay, especially the part of the harness that extends across the top of it... which I would (and did) wrap in some heat shielding.
This is the same reason why single turbo's have heat blankets... right? Otherwise who would put one on?
Wrap the DP to protect everything else in the engine bay, especially the part of the harness that extends across the top of it... which I would (and did) wrap in some heat shielding.
This is the same reason why single turbo's have heat blankets... right? Otherwise who would put one on?
#46
Lives on the Forum
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I'm 100% sure its not noticeable but if there was a way to accurately measure it, wrapping the downpipe actually has a negative effect on exhaust flow at the turbo. Using the argument, that if your exhaust is big enough, doesn't count since your using size to compensate for lack of efficienct. Besides a full 3" exhaust will still have backpressure on a decent horsepower rotary. I'm making 415 rwhp on a Mustang dyno with the 500R-SP and had 11 PSi of backpressure with the Racing Beat dual-tip catback and it dropped to 3 PSi when I installed a full 3" titanium canister.
Don't get me wrong, wrapping the downpipe is generally a good idea to keep the heat where it belongs. However, I want to make sure its understood that the wrapping's only positive benifit is keeping the heat away from other things. And depending on the position of your turbo, it might not even matter.
If I were to build a race car I would not use wrap, only a turbo blanket.
A turbo blanket actually provides some positive benefit as it keeps more energy in the turbo. And keeps the turbo from superheating the air around it.
thewird
Don't get me wrong, wrapping the downpipe is generally a good idea to keep the heat where it belongs. However, I want to make sure its understood that the wrapping's only positive benifit is keeping the heat away from other things. And depending on the position of your turbo, it might not even matter.
If I were to build a race car I would not use wrap, only a turbo blanket.
so the lesson of the story...
Wrap the DP to protect everything else in the engine bay, especially the part of the harness that extends across the top of it... which I would (and did) wrap in some heat shielding.
This is the same reason why single turbo's have heat blankets... right? Otherwise who would put one on?
Wrap the DP to protect everything else in the engine bay, especially the part of the harness that extends across the top of it... which I would (and did) wrap in some heat shielding.
This is the same reason why single turbo's have heat blankets... right? Otherwise who would put one on?
thewird
#47
John Dillinger
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there is 2 different wrap that Dei selling. so which one you guys use to wrap it?
Titanium Wrap with LR Technology
http://www.designengineering.com/pro...sp?m=sp&pid=95
and this:
Exhaust / Header Wrap
http://www.designengineering.com/pro...asp?m=sp&pid=9
so which is which..? anyone ?thanks
Titanium Wrap with LR Technology
http://www.designengineering.com/pro...sp?m=sp&pid=95
and this:
Exhaust / Header Wrap
http://www.designengineering.com/pro...asp?m=sp&pid=9
so which is which..? anyone ?thanks
thanks
#49
Racecar - Formula 2000
That's fine, but you make that assumption that backpressure will rise due to the added velocity, which would only be true if the downpipe is not large enough to support the added velocity. Extra heat is not created, it just redirected. I am reffering to a 3" single turbo downpipe.
My main arguement here is that wrapping or coating your downpipe will have ZERO negative effects on manifold backpressure.
My main arguement here is that wrapping or coating your downpipe will have ZERO negative effects on manifold backpressure.
It's not much different from air flowing through a hose - more volume of flow means higher velocity, and also means a greater inlet pressure (backpressure) needed to move it.
Dave