- Joined
- Jun 28, 2009
- Messages
- 2,181
Steve Maney started out with a beefed up drive side case many years ago (over 20?) before he went on to manufacture complete crankcase sets.If you have access to a decent foundry, it might be worth moving on to producing stronger crank-cases. That would allow the old type commando engine to rev higher without doing damage to itself. These days we can buy billet cranks and long steel rods with light pistons. But building a top end motor using the old parts is pretty unrealistic. The Fullauto head is good but the bottom end of the motor sucks. The usual failure from over-revving is a split in the drive-side case - through the bearing housing. It dictates that the older Commando motor must be tuned to deliver more torque, rather than power higher up the rev range.
If you could safely rev a long-stroke Commando motor to 9000 RPM, it would really go.
Balance factor would be important. But if you rebalance a Commando crank to suit 9000 RPM, the standard cases would probably fail due to the imbalance at lower revs.
One of the key reasons for him taking a back seat was the foundry he was using decided it no longer wanted the work.
Andy Molnar is now manufacturing stronger cases, so not sure there's a gap in that market right now.
Just great that cylinder heads are now on their way back on the market