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

No luck with the balance factor, although i do have one more avenue to explore, i will let you know if i get a result. I think the seperation of the components looks like the most likely outcome. I have some new pistons as well, which are 65 G lighter than the OE, so some careful attention will need...

Neil and Paul, thank you both; very useful information, which is helping me to build on my limited, non-technical ,level of understanding. On the point you made Paul, about keeping the original flywheel, when i was lightening the original on a lathe, it fell into two parts. My mate who was operating...

Thanks for the replies; i will try the leads suggested and let everyone know the outcome, Bryan

Hi,i am tying to find the data[balance factors] required for the dynamic balancing of a crank/flywheel assembly. I have tried several respected sources of information, but drawn a blank. Are there factory or racing team specs still available? many thanks, Bryan

Hello all, can anyone give a definative answer as to the weight difference, between a series 1, and series 2 rear axle? I seem to think the seies 1 is lighter by some margin, many thanks, Bryan