This allows easy removal of spent gasses and creates more airflow to the engine. Working with Header Wrap for the first time. Wrapping a pipe takes time and concentration.
Along with adding color to the wrap, HT Silicone Coating increases the longevity of your wrap by locking the fibers together.
You can wrap most types of metals, but the recommended type of wrap material is a quality grade stainless steel. Wetting DEI glass fiber exhaust wrap is recommended as it helps the material become more flexible, allowing for a much tighter fit during installation. Be sure to let the wrap dry completely before applying HT Silicone Spray. Wetting DEI Titanium exhaust wrap is not necessary as the material is already extremely pliable.
You can wrap your original exhaust pipes to control heat. Wrapping stock cast exhaust manifolds can be difficult, for this application we recommend using our Form-A-Shield product. Form-A-Shield is designed to cover odd shapes and is easy to install over odd shaped parts. We do not recommend wrapping Titanium exhaust pipes or manifolds. Our Locking Tie Tool makes installing them quick and easy. Stainless steel hose clamps or lock wire will also work. They provide easy and efficient installation, professional looks and maximum durability.
Try this experiment the next time you launder a load of bath towels and then dry them. Immediately pull them out of the dryer and just toss them in a snug pile on your bed. Now leave them there for a many hours, even a day, and then open them. You will find that there is still a considerable amount of heat left in the center towels.
This heat, even though the outer towels and bed are normal room temperature have been able to contain their heat. This is a simple thermal insulation test, but compared to your headers you have an internal heat supply constantly coming from the engine when running. The freshly dried bath towels do not need to breathe, your header material does.
The heat on the outside portion of the header material is trapped between the wrap, and the small amounts of moisture that develop will soon cause the header to fatigue. This build-up of heat and moisture is amplified by the wrap. When this moisture heats up, trapped between the heat source header and the wrap, it superheats. Another related example is the condensation that builds in a vehicle's exhaust piping. How often do we wake up on a cool morning and see the steam coming out of the exhaust pipes of our own and other vehicles.
Small amounts of moisture from the air has been drawn into the cooling exhaust piping and is now being burnt off the next morning. This is not usually an issue because it burns off. In extreme cases the regular moisture can cause the exhaust piping to rust out. It is for this reason attempts to keep moisture from developing between the header and wrap that the header wrap manufacturers state that a tight, secure installation of the wrap is imperative.
However, it will never be tight enough to prevent moisture from being drawn in! Although the EGTs inside the header basically stay the same by the tune of the engine and use, the properties of the header material changes by amplifying the temperature from the insulation and collected moisture.
This action goes against normal laws of thermal dynamics, but this effect is fact, and you have to pull the ears off most engineers before they believe you. This is the trouble with a great education, but lacking in something that is often just as important "common sense"! If you decide not to believe these statements that is your choice. Go ahead and install the header tape on your headers, and we'll be happy to sell you a new header set!
Pretty impressive difference! With any coating it is important to not damage the coating. The thermal coating becomes part of the header material. Most of the other coating brands are comparable to these figures as long as they are multi-layer , inside and outside of tube applied and using proper materials.
NOTE : Most "inside" tube coating applications will not cover the entire inside of each tube, as they are limited by the length of the application wand.
This is not a problem. In addition, there are so many variations and grades of these fibers they might have a lower temperature threshold than fiberglass fibers. If people must spray for color matching or to try and minimize color, they should really do themselves a favor and go buy some high-quality exhaust paint like VHT.
Not only will this cost less than rebadged silicone exhaust wrap and spray sold by other companies, but it will actually take more heat and last longer. Measure the temperatures coming off your exhaust before you buy an exhaust wrap.
At Heatshield Products, finding those numbers is easy. We boldly and accurately state our operating and peak temperatures on all of our header wraps and heat wrap products.
Not all manufacturers do! Make sure you get the right wrap for your measured exhaust temperatures so you only have to do the job once. The store will not work correctly in the case when cookies are disabled. Posted: August 03, Categories: tech.
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