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Originally Posted by cRiPpLe_rOoStEr
That's an interesting project. Regarding engine pre-heating, even if your cars stay inside at night during winter, some electric coolant heater and a heating pad at the oil sump can actually be very helpful regarding efficiency since it would lead the engine to its optimum temperature sooner. You might even take a look at wrapping the sump externally with some insulation. BTW do you remember some big rig engines such as the Detroit Diesel Series 60 had composite sumps and some Caterpillar engines even have composite valve covers?
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I understand what you are saying. Are these components meant to stay on or get switch on from a timer via 110v wall outlet or do they come on when you start the car to help heat it? I briefly touched up on it in my original post, but I intend to coil tubing around the downpipe to flow coolant through. The main purpose of this was to aid in warm-up and to help maintain temperature. My first TDI had the EGR cooler deleted and I couldn't get up to temperature before making it to work. Even with heated R32 seats (which feel like being cuddled as a child by your mother), it was still a miserable experience in the winter. I believe that the coiled down pipe will also increase exhaust gas density exiting the turbo which would have a slight scavenging effect, even if it is only worth 1/100th of an MPG.