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Great request, bybcous.
A couple concerns: Part of the loud start up is the pre-dump of fuel into the chamber when the starter cranks to get it into the exhaust and warm up the catalytics faster -- which also causes the smoke-off after startup. Initial turn over also jumps to 1500rpm, then drops to 1000rpm for 30-60 secs and finally idle at 550-600rpm.
Will just closing the valves provide the quiet startup the OP is asking for? If so, count me in. But I would really like to see/hear the difference of two cars side-by-side. The idea of not waking my neighbors when I go out at night is very appealing.
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