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Old 07-21-2018, 11:47 PM   #37 (permalink)
oldtamiyaphile
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Join Date: May 2009
Location: Australia
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UFI - '12 Fiat 500 Twinair
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Quote:
Originally Posted by stefanv View Post
As my hyperkilometring evolves, I've found I use my kill switch more and more. When using it while rolling, I've usually restarted by letting out the clutch, but it's very hard to do this smoothly, since of course I can't match engine RPM to gearbox RPM when the engine isn't running yet. I think if you do this smoothly, it's hard on the clutch, and if you do it roughly, it's hard on the engine, transmission, and mounts. Thus, I've changed to restarting using the key.
Correctly bump starting shouldn't be hard on the clutch. It takes 1/10th of a second to spool up around 40kg of mass inside a small engine. It takes about a second of slip to get a 1000kg car moving from a stand still. The wear rates aren't even remotely comparable.
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