International Lancia Forums

I've come to learn that balance factors are guarded like the crown jewels !!

The 50% factor is used for the V6, and I believe it is also used commonly for the other Lancia geometries as well, but am not confirmed on that.

There was a machinist who told me that old-time racers used to fiddle with this in American V8's, using 51 or 52% allocated to the reciprocating mass - to possibly get smoothness at yet higher revs. But use of the 50% for the street engine is pretty much a given today.

I believe (but still not too sure about this) that the 50% value has to do with a vector analysis by placing a counterweight to counteract some forces, but am still not sure as to why 50% (vs. 100). I'll try to get to the bottom of this.

Neil - I know there is someone nearby who knows more than the rest of us about this.... how about a family dinner discussion?

Geoff

Geoff, its probably not very helpful, but i found the balance factor for the VW engine which has the 15 degree V; its 30%, seems a lot different to the figures quoted....thought i would mention it due to the variance, Bryan