crankshaft broke again??

[Cozza]

Hi Dazzed

Picked up an old thread here, but I was Just wondering if you have had this problem again, or have you got to the bottom of the problem?

I have recently bought a motor with a crank snapped in the same place as where you were describing.

It was out of a rally car and the sump had been cracked and had lost oil but all the bearings were fine so I don't think the oil loss was the problem.

It was running a solid balancer and a lightened 240mm flywheel with a heavy duty clutch but not sure of it's details.

Any tips or advice what be appreciated.

 

Cheers

Mick

[NZeder]

The fix is simple and well known by now - or at least I would have thought. Don't run a 225mm or 240mm clutch setup period. Move to a twin place 7.25 or triple 5.5" titlon or equivalent get that weight of the back end of the crank.

 

Forget the cost of these setups so you drop $1-2K on a flywheel/clutch setup vs how many rebuilds so far?