I talked to an engineer about it at work and he thought it was a great idea which people do on cars. He showed me a diesel generator he had installed in a towable trailer. The exhaust was wrapped where it went through the trailer wall. It's like ceramically coating the headers and pipes. The heat goes out the end of the pipes rather than burning your leg off. Can you get the wrap under the chrome heat shields so it doesn't look like *****?On 2006-11-28 20:22, Lee wrote:
Header/Exhaust Wrap has anyone used this on the R3 headers? Does it reduce the heat eing thrown off the headers or is a waist of time...
It's pretty simple really--conduction, convection, and radiation is where heat goes. Wrapping the exhaust pipes is like using a Thermos, hot on the inside cooler on the outside. No way this is going to put a greater demand on the engine, it may increase the temp of the exhaust pipe itself due to less convection and radiation but it won't keep any heat in the engine. The only miniscule effect would be if you wrapped it within one inch of the exhaust port then you might see a difference in conduction. The pipe would be hotter and sure, if the pipe was 300 degrees F below zero, then you'ld see a heat transfer from the engine to the exhaust pipe but the exhaust is forcible shoved out the pipe and from a heat standpoint, the engine doesn't care about the temp of the exhaust when it goes out the end of the pipe. Exhaust valve temps can spike without exhaust wrap and you'll never see a difference in the indicated water or oil temp but you will on an exhaust temp sensor. Still, considering what was mentioned as the topic for this thread, exhaust wrap is not going to hurt the engine. If you had a highly conductive exhaust gasket and put a blow torch on the surface of the pipe within three inches of the block and got it up to 12,000 degrees you might be able to measure something but the primary purpose of an exhaust pipe isn't to be a heat sink for the block and if you're worried about the minor effects of conduction in this case then don't start the wrap within the first couple of inches.On 2006-11-30 11:31, rktmn3 wrote:
So where does all that heat energy go if not down the exhaust? I would think it stays in the engine which puts a greater demand on the oil and radiator coolant to take it out of the engine.