Pros and cons of lightened flywheel ? Options

[sixaddict]

Have a 3 liter with 46s in 914…..Trying to decide if I want to install a lightened flywheel I have on the shelf. Basically a track car.
Looking for input from anyone who has made that change.
Thanks ,

[Charles Freeborn]

My previous 914 / 4 had a lightened flywheel. I didn't notice spectacular difference in its ability to "spool up quickly" but I'm not an experienced enough driver to notice those levels of nuance. That car was built for a specific class of PCA racing that put it up against very similarly built 914's so every nano second of performance was worth chasing. If you're going to production class or vintage race it, those benefits are harder to justify.
Personally I think that trying to get a 50 plus (in some cases) year old car to behave like a modern "twitchy" car is a fools errand. With the antiquated synchro gearbox there's only so much you can do with modernization. In my book these are vintage cars and should be treated as such, but that's just my .02ç.
I would say look up what Porsche used back in the day for a similar drivetrain and copy that. Trying to out think the Porsche engineers is another fools errand... IHMO, that is.

[stownsen914]

For a track only car, there's not much downside really. Any downsides would be things like
Needing a little finer touch on the clutch to get the car rolling without stalling.
RPM may tend to "hunt" when cruising at lower speeds, like in the pits/paddock.

For a street car, could be a little annoying, but neither is much of an issue for a track car IMO. I've had a light flywheel and clutch in two different 911 powered racecars and have been happy.