1991 Carrera 2 Cabriolet (Type 964)
Dyno Report
I decided to get an idea on how my car was running, so I had her dyno'd at SR Racing in Lexington, KY. Overall, I must say that I am pleased with the results. The Dyno was an SF-840, good for 1000 HP / 200 mph. We did not measure air-fuel mixture, just Power and Torque. I decided (thanks to my checkbook) to leave the other measurements for another day. I had two runs, and was in and out in under an hour. I recommend SR Racing for anyone who is in the Lexington area.
Overall, I am very pleased with the results for my 10+ year old, 117,000 mile Porsche. At the wheels, my peak output was 219.7 HP @ 6238 rpm, and peak torque was 196.9 lb-ft @ 5228 rpm. Using a 15% fudge factor (this is what I have typically seen used for the 964 series), that converts to 258.5 HP and 231.6 lb-ft at the flywheel! Unfortunately, their computer was set to a 10% fudge factor, so the engine numbers in the data sets are off. Needless to say I was ecstatic, considering these cars were spec'd at 250 HP and 228 lb-ft when new! And, as far as I know, the car is stock, and never been rebuilt.
Outside Ambient: 59 deg F, 56 % RH
Pressure: 30.06 in. Hg
Room Temp: Between 65 deg F and 70 deg F
Gear Tested: 3rd Gear
HP/Torque vs. RPM HP/Torque vs. Speed (mph)
Gee, the torque curve is nice and flat! You have to like that even power distribution! And the man running the car during the pulls was impressed by how the car felt above 4000 rpm!
Data (part 1) Data (part 2) Data (part 3)
Last updated: February 23, 2004
