Heat/thermal wrap...do they make a difference?
I just finished wrapping my downpipe and testpipe and I feel like it made a difference, but this is only my opinion and based on my butt-dyno.
I am not halucinating, however, that it made the exhaust resonate less. It's not as "boomy" inside the cabin and has directed more noise through the tailpipe than into the car, but again, I did a little more than just the downpipe which is usually only what is done.
I can't say it added any real power nor has helped keep things noticeably cooler, but I'm pleased with the results so far.
I am not halucinating, however, that it made the exhaust resonate less. It's not as "boomy" inside the cabin and has directed more noise through the tailpipe than into the car, but again, I did a little more than just the downpipe which is usually only what is done.
I can't say it added any real power nor has helped keep things noticeably cooler, but I'm pleased with the results so far.
I don't think it's going to add any power. Well maybe indirectly...
basically you heat wrap to keep heat in or out. I can't imagine wraping the dp would do anything, but wraping an radiator pipe or IC pipe that runs near a heat source would be good.
basically you heat wrap to keep heat in or out. I can't imagine wraping the dp would do anything, but wraping an radiator pipe or IC pipe that runs near a heat source would be good.
I agree.. It works if you are using it for its intended purpose.. Keeping heat away from stuff you want to keep cooler.. Keeping heat in the exhaust manifold should increase spool as the energy is then used for expanding gases.. on the downpipe it will reduce resonation and rattling, and keep heat away from the oil pan.. It might also assist scavenging a little which can help boost levels and flow slightly..
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Swaintech.com pretty much sums it up...
Basically it's a "heat wrap" but in "paint" form.
http://www.swaintech.com/header.html
The theory of insulating the exhaust system to retain heat is commonly overlooked by most racers. After heat has performed its function in the combustion chamber, it travels out the exhaust port to the header. If the Gases are allowed to cool, they lose velocity and the scavenging effect is reduced. If by insulating the exhaust system, gases inside are kept at the highest possible temperature, the resulting effect is a greater exhaust gas velocity and higher efficiency. Each gas pulse moves through the pipe faster, making room for the next and pulling it along. This reduces back pressure and increases the "super-charging" effect created by the now of high velocity gases.
Insulated headers also reduce radiant heat and lower underhood and cockpit temperature. By reducing air intake temperature 10°F, a horsepower increase of 1% results, a 30°F drop equates to a 3% horsepower increase. This is inexpensive horsepower.
Insulated headers also reduce radiant heat and lower underhood and cockpit temperature. By reducing air intake temperature 10°F, a horsepower increase of 1% results, a 30°F drop equates to a 3% horsepower increase. This is inexpensive horsepower.
http://www.swaintech.com/header.html
Originally Posted by GOKOU
I thought people say a DP or exhaust leak will not effect performance so why wrap???
I have a DP leak and it seems to matter but I couod be paranoid
Please explain.
I have a DP leak and it seems to matter but I couod be paranoid
Please explain.Bump for an answer
A leak will effect power. It's almost impossible to quantify how much of a loss is created, but it is somewhat noticeable. It's a disruption in the flow of exhaust gas and this can add backpressure and limit power. However....
....wrapping is not intended to seal up a leak.
It's intent is to insulate heat within the piping to maintain the highest level of flow and to reduce radiant temperatures (and noise as a byproduct).
....wrapping is not intended to seal up a leak.
It's intent is to insulate heat within the piping to maintain the highest level of flow and to reduce radiant temperatures (and noise as a byproduct).
