Quote:
Originally Posted by Gdiddy23
Still won't ever understand why ppl can't wait for the engine to warm up before revving/recording. Do they not understand the valves stay closed for the first minute or so?
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Not only that but the turbo wastegates are usually held fully open, ignition timing is retarded, and exhaust valves (in the cylinder head, not the muffler flap valves) are kept open to try and heat the catalytic converters up as quickly as possible so the engine will sound very different during that cold start cat heating cycle.