"Has anybody got any idea of the typical temperature profile ahead of, and after, the turbo at full power?"
Most EGT gauges at full throttle on a turbo car will read anywhere from 1200-1700 degree's F. Depending on the AF ratio. I believe cruising is around 800-1000 degree's. But i dont have an...
The Ft per second is 200-300ft not 2000-3000, my bad.
Car manufactures dont do a lot of things performance enthusiast do because its unreliable and takes a lot more maintence to up keep, something consumers don't want. And F1 hasn't used turbo's since 1988.
They dont really use heat blankets before the turbine, they are used ON the turbine and top of the downpipe, the exhaust gas exiting a turbo can be 2000-3000ft per second. You want to keep that speed up. Thats why they also heat wrap Dump tubes off of wastegates. I dont want to get into an...
"the gas will have to flow at an increased velocity"....isnt that what you want? I've seen countless high horsepower cars with wrapped down pipes. And most turbo kits come with heat blankets that cover the turbine and upper part of downpipe, to increase heat and gas veolicty.
And if you cram...
"I certainly don't see any advantage in insultating the exhaust system once you are past the turbocharger."
If the downpipe is wrap with insulator, the downpipe traps that heat from the exhaust gas in the downpipe, the hotter the exhaust gas the faster it moves, so the faster u can get that gas...
