Done on 3/99 on a Dynojet Model 248C Dynamometer
All results are rear wheel horse power not horse power at the flywheel
Dyno condition were 70 degrees, 29.05-0.37 In. Hg. 1070 ft, CF=1.02
Dyno information for US 993 owners
After my Dyno test I found out from Dan Keenan at Dynojet that the maximum horse power for a US geared 993 is in 4th gear. My Dyno run was done with the car in 2nd gear, if I would have done it in the 4th gear I would see as much as 250 HP from the rear wheel.