Quote:
Originally posted by T4 Primera
Lightened flywheels do not increase hp as such. What they do is reduce rotational inertia so that some of the horsepower that was used in accelerating the flywheel rpm is freed up for linear (vehicle)acceleration.
|
Most correct. On a inertial dyno like a Dynojet (popular here in The States), you will indeed read more hp, but it's not real. As you pointed out, the car will accelerate quicker though.
Quote:
Originally posted by T4 Primera
Downside of lightened flywheels is that with reduced rotational or angular inertia, more revving and clutching may be required to get the vehicle moving from a standstill.
|
Also most correct. There are some folks who believe one shouldn't use a low mass flywheel for drag racing. That's goofy as far as I'm concerned. It just makes the launch trickier. You can create the same momentum at the flywheel by adding revs, but the rpm window for a good launch is narrower.
In real world driving I've found no downsides to the low mass flywheel. Then again, the JWT clutch is not an extremely agressive clutch. With an agressive clutch it can take some getting used to. With the JWT clutch, my wife didn't even notice the difference (other than the lighter effort) and the P10 is her car.
