I bought my 2003 Cobra Vert used back in August of 2010; 36,XXX miles with (2) previous owners. The dealer "claimed" the PCM was reflashed and had a SCT tune on the vehicle, but who really trusts a dealer!? I decided to pay my friend's a visit at Power By The Hour Performance since they're right down the street from me and have a spanking new dyno on-site.
We did a total of 3-1/2 pulls this afternoon. First, was using the Diablosport Predator Pulley Tune with 5% fuel added from 2000-4000 and 4000-7000 WOT respectively. The car made 479 HP and 431 TQ with SAE Smoothing at 5. Air/Fuel was 11.88 with peak boost at 12.11 psi.
Second pull I reflashed the PCM back to the so called "tune" that was installed when I purchased the car. As I expected, it wasn't anything to smile about. The car made 485 HP with the same torque number as the previous run. Air/Fuel was lean at 13.44 with peak boost at 11.89 psi.
Third half-pull started out in 6th Gear before we realized what was up, something to chuckle about none the less.
Fourth pull I used the Diablo pulley tune as is. The car made 485 HP & 450 TQ on the final pull. The air/fuel was 11.95 with peak boost at 12.18 psi. Run conditions were 85.94F, 29.56 in-Hg, with 39% Humidity.
I was impressed to say the least, I was expecting peak power to be somewhere around 440-460. My car has the following mods:
-Stiegemeier Stage III Ported Eaton, Throttle Body, and Plenum
-Stock 3.65 Upper Pulley/4# Metco Lower Pulley/3.2 Alternator Pulley
-BilletFlow Bracket and 4-pc. Idlers
-Steeda CAI (less heat shield)
-Bassani X-pipe with Cats
-Borla Stinger Catback
-Spec Stage 3+ Clutch
-AFCO D/P Heat Exchanger
-PFAB Intercooler Tank
I believe everything else is stock for the most part. I keep finding new things that are modded on the car; a few weeks ago I learned I had Strange 10-way rear shocks so who knows what else is done.
The tuner on-site said we have "plenty of room to grow" in the future. I plan on adding a 3.1 upper once I get my hands on a MAFia and Boost-A-Pump. Then I'll come back for a custom tune session.
Big thanks to Jake at PBH Performance. :beer:
We did a total of 3-1/2 pulls this afternoon. First, was using the Diablosport Predator Pulley Tune with 5% fuel added from 2000-4000 and 4000-7000 WOT respectively. The car made 479 HP and 431 TQ with SAE Smoothing at 5. Air/Fuel was 11.88 with peak boost at 12.11 psi.
Second pull I reflashed the PCM back to the so called "tune" that was installed when I purchased the car. As I expected, it wasn't anything to smile about. The car made 485 HP with the same torque number as the previous run. Air/Fuel was lean at 13.44 with peak boost at 11.89 psi.
Third half-pull started out in 6th Gear before we realized what was up, something to chuckle about none the less.
Fourth pull I used the Diablo pulley tune as is. The car made 485 HP & 450 TQ on the final pull. The air/fuel was 11.95 with peak boost at 12.18 psi. Run conditions were 85.94F, 29.56 in-Hg, with 39% Humidity.
I was impressed to say the least, I was expecting peak power to be somewhere around 440-460. My car has the following mods:
-Stiegemeier Stage III Ported Eaton, Throttle Body, and Plenum
-Stock 3.65 Upper Pulley/4# Metco Lower Pulley/3.2 Alternator Pulley
-BilletFlow Bracket and 4-pc. Idlers
-Steeda CAI (less heat shield)
-Bassani X-pipe with Cats
-Borla Stinger Catback
-Spec Stage 3+ Clutch
-AFCO D/P Heat Exchanger
-PFAB Intercooler Tank
I believe everything else is stock for the most part. I keep finding new things that are modded on the car; a few weeks ago I learned I had Strange 10-way rear shocks so who knows what else is done.
The tuner on-site said we have "plenty of room to grow" in the future. I plan on adding a 3.1 upper once I get my hands on a MAFia and Boost-A-Pump. Then I'll come back for a custom tune session.
Big thanks to Jake at PBH Performance. :beer:
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