Light weight flywheel?, Street driven 914-6 w/ 2.7l RS spec engine & 901 transaxle Options

[Rufus]

Hi Folks - I just bought this 914-6:

http://www.914world.com/bbs2/index.php?sho...346147&st=0

In planning to add an LSD, I’m also considering a lightweight flywheel.

Will the low end torque of the 2.7l RS spec engine with 901 gearbox (believed to have stock 914-6 ratios), in a stock curb weight ‘70 914-6 be compatible with street driving with a lightweight aluminum flywheel without making starting off too edgy? It has a new street clutch; nothing radical. Also my new 205/55-15 tires are about 5% smaller in diameter than the 185/70-15 1970 OE tires ... and thus provide about 5% greater torque multiplication.

(Why? I did this on my street driven ERA 427 Cobra, and liked the benefits to engine response, and reduced rotating / overall vehicle masses. In that case, even with a triple disc racing clutch, starting from a stop was still pretty manageable.)

Opinions appreciated ...

[stownsen914]

I'd say it depends on whether the car still has the early 2.0 flywheel. The early flywheels are heavier than the later ones, so I'd say it would make sense to go with a lighter one. I think the early 215mm ones are like 15 lbs, while later 225mm ones are a few lbs lighter.

Note that light 215mm flywheels are more expensive due to the more complex shape. I haven't heard of an aluminum version of the 215mm one, but it would be cool if there were.

Another option is an aluminum pressure plate. The aluminum 215mm one is NLA as far as I know, but they turn up in the classifieds from time to time.