Quote:
Originally Posted by Steve@Rennsport
FWIW,..Ti is ONLY used for the valve spring retainers, NOT the springs (thankfully).
The RSR's used the stronger 964 crank as it has more rod bearing area for durability at high RPM.  The 993 cranks are OK, but not the preferred item for engines that will see north of 7K. |
Steve,
When the factory used the 964 crank, did they run a special harmonic balancer? Or leave it off? Patrick Motorsports claims no reported crank breakages with the use of their crankpulley for eliminating the harmonic balancer.
Emerald,
I'd keep things very simple and advocate not spending additional $ where they may be unnecessary. Chip and exhaust should put things into a nice power range.
You could consider use of the earlier 964 cams along with a cam upgrade, which wouldn't be terribly expensive. I use a 993 supersport grind which has a nice flat curve, but seems to offer improvment. Maybe the solid lifter can follow a more aggressive profile than the hydraulic lifter?
Email me and I'll send you back the dyno #s for my setup (3.6, '95 non vram intake and engine management).
Doug