Flywheel Replacement???

[Jake Raby]

One thing my CN controlled balance machine has taught me is that rotating masses must be balanced as units.. I can hang a perfectly dynamic balance flywheel onto a rotating mass assembly and to correct the "plane" 2-3 grams of material will have to be removed from that flywheel to bring the entire mass in an .5 ounces per inch or below. Stabbing an new part onto an assembled engine is never optimum as you can't correct the plane differences as the engine is assembled. Reducing the component weight further impacts the balance differential that the mass will see with a component swap with the rest of the engine assembled.

We even balance index pressure plate bolts and washers.. @ 6"+ radius everything is critical..

I have seen 3 Boxster engines with loose crank pulleys so far, one did fall off...

The sprung center disc is a great addition to the driver and tranny, but does very little to absorb the harmonics within the engine. I am working on a harmonic balancing crank pulley that could be added to the engines that have lightened flywheels for some dampening, something set up like a Chevy is the current prototype.

[insite]

wow, jake. i think i speak for all of us when i say i am VERY glad you found this board. great info.

[Jake Raby]

Originally Posted by insite

wow, jake. i think i speak for all of us when i say i am VERY glad you found this board. great info.

After my post this morning I put some time into the harmonic balancer development... Should have a prototype in 3 weeks. I'd like to implement a kit that includes the harmonic balancer, sprung center clutch disc and the lightened flywheel as an assembly... Selling someone just a lightweight flywheel is kind of asking for issues with these engines, and we try to be problem solvers, nt creators.

Thanks for the compliments, it's great to be hanging out here and having interface with the Boxster drivers.

Wait till you guys see what we have in store for 2009, the Boxster engine has done a 180 degree barrel roll!!

[Cloudsurfer]

Jake-

This is very interesting information. So, for those of with Aasco LWF's, you feel we have a higher probability of potential issues? I had always thought that the reduced mass of a LWF was a good thing?

Hypothetically, if one were to purchase an engine from you, with LWF, would you dynamically balance the whole rotational mass?

Also, I"m sending you a PM on an outside idea of mine

Patrick