Lightened flywheel and turbo

  1. Regular Poster Joined: Dec 2006 leeds Posts: 313 2003 saxo VTR, 2000 VTS
    #1
    If a lightened and balanced flywheel makes your engine rev quicker,
    Will it make your turbo spool quicker? Or am I just being daft?
  2. Established Member Joined: Oct 2009 exeter, devon Posts: 1224 Clio 172
    #2
    the engine will rev up quicker, so will get to the right revs to spin the turbo up sooner
  3. Saxperience Forum Bum Joined: May 2007 Posts: 4857
    #3
    Yes and no. You can not take all that much weight off the fly wheel and when you take in to account all the other mass that has to be accelerated and friction over come the difference when a vehicle is in gear is negligible. Its when you are matching engine speed on gear charges that most of the effect it noticeable. As it allows you to change gear quicker. However saying that most people even on track days don't drive like this. But yes for those split seconds between gear changes the turbo would spin up ever so slightly quicker.

    However on the down side the fly wheel is a great damper and helps you have control over your throttle. This is a desirable attribute even more so in turbo cars where the turbo is always playing catch up. The fly wheel is also one huge heat sink. Turbo cars are very hard on there clutches as is so again this attribute is very desirable. The standard fly wheels are also not the strongest out there. Hence why for the most part turbo saxos tend to run quite weighty fly wheels.
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  4. Regular Poster Joined: Dec 2006 leeds Posts: 313 2003 saxo VTR, 2000 VTS
    #4
    Great info there mate thanks a lot was just wondering iv got a stage 2 head in my other saxo so that would probably be a much better option for reducing spool time