I have some dyno time scheduled for Saturday, so I wanted to get a current baseline on my 08 Cadillac STS-V.
Racelogic PerformanceBox GPS times:
New low time today — a 4.55 sec 0-60 mph with rollout, or 4.94 sec w/o rollout. This was my goal for the V — to get to a solid <5 sec without rollout. Car had 3/4 tank of fuel and the run not heat soaked. The STS-V has the Spectre cold air intake and a Corsa axle-back exhaust system. I weigh 35 lbs more than the standard 160 lbs for the buff magazine journalists who get the great times for car mag tests. Local fuel is 93 octane E10. The backup 0-60 run was 4.74/5.13 sec.
The 60′ time was 2.2 sec, which is an improvement from my usual 2.4 sec. PkAccelG was 0.77G. The 1-2 shift was recorded at 0.4 seconds.
Peak Hp was calculated at 6,371 RPM: [click on the image to zoom, hit back to return]
Calculated HP has steadily run less than expected on this V, but I am not clear why. It uses the Delivered Torque calculated by the engine at RPM to calculate theoretical HP. The value is a notional figure and not considered accurate for tuning, but I use it as a relative indicator. I am also not able to run flat out in 4th gear as on the dyno though.
Same run, peak HP at 65 mph at top of 2nd gear:
Interesting that boost in 2nd gear was running 10.6 psi vs 8.8 psi at the top of 1st gear. I do not think this is a tuning issue but may have just been a transient thing. The boost was trending in the 9s then dips and then peaks at 10.2 psi at the 1-2 shift in the scan.
Due to the low temps, the IAT Advance was actually ADDING timing instead of retarding!
Here is the cold air IAT / IAT2 histogram for the whole test cycle:
No KR anywhere on the run. PE is commanding AFRs down to 10.5, so that is something to consider. Safe AFR for a supercharged engine probably up at 11.5 to 11.8 where the engine should make more power.