Early Holden Racing....pre EH

[Ellis]

Yes but to fit them requires lots of machining and if you lose a block you have to get it all done again.
I think its only the 59 Crank that can be used.

Billet is the way to go if you need to rev them to 7 K rpm+.
They are about $4k (3 years ago ) plus the machining to fit them...probably 10-12k all up.

The Vaux crank fitted to the Brock car I have heard was in vicinity of 20K.

I'll stick to the original and keep revs below 6k. That broken crank did 4 1/2 years
The replacement is into its second season (touch wood) doing about 6 meetings a year.

I think the clue is to get the flywheel /clutch assemby down to a bare minimum weight and run a good balancer.

Old speedboat racers ran no flywheel at all and revved them to 8k+

I have heard that there is a historic speedway class in NZ that use Grey motors ....be interested to hear from anyone that knows about it