Quote:
Originally Posted by gwyllion
The rule books talks about "atmosphérique" vs "suralimenté", which can best be translated as "normally aspirated" vs "forced induction". So in theory you can use a turbocharger (exhaust gases driving the compressor), a supercharger (crankshaft driving the compressor) or both, irrespectively whether the fuel is petrol or diesel.
However, as you can read on http://en.wikipedia.org/wiki/Turbodi...diesel_engines it does not make much sense to use a supercharger on a diesel engine. Superchargers take away power from the engine and are bad for fuel economy. A turbocharger almost come for free because you recover energy from the waste exhaust gases. |
^ this. Supercharging a diesel engine is possible and works fine, but it comes at the cost of fuel economy - its highest advantage. If someone were running a diesel engine for a single-lap time attack, it would make sense, but not a 24hr race.
Quote:
Originally Posted by chernaudi
However, I did hear a noise in the Sebring video that sounded sort of like a wastegate when the R18 took off in the pits. Maybe it's a VGT that uses a wastegate for some reason (saftey/reliablity factor)?
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That was compressor stalling. Wastegates don't make a stalling or fluttering sound. They just open and close. I have no idea which ricer started spreading this 'wastegate chatter' myth about compressor stalling/fluttering noise, but whoever it is...
