Location: Carlisle Fairgrounds, Carlisle, Pennsylvania, USA
Elevation: ~450 ft
Dyno: Axcelerated Motorsports Dynojet 248H High Inertia Chassis Dynamometer
Vehicle: 2004 Grand Prix GTP Competition Group, 93 Octane Gas
Modifications:
- ZZP 3" Stainless Catted Downpipe
- ZZP Stainless Powerlog
- 9" Oiled Intake Cone Filter
- 3.4" Supercharger Pulley
- 180* Thermostat
- Autolite 104 Spark Plugs
- 10.4mm Taylor 409 Pro Race Spiro-Wound Spark Plug Wires
- Overkill Tune
Test #1:
- Thrasher "Cold Air Intake" Box
- 2 "Runs"
- 10:04 AM
- 83.56* F
- 29.66 inHg
- 25% Humidity
- HP: 222.50 @ 5,000 rpm
- Max HP: 223.81
- Torque: 260.60 @ 3,400 rpm
- Max Torque: 261.18
Test #2:
- "Open Cone" / "Hot Air Intake" (Box Removed)
- 2 "Runs"
- 2:23 PM
- 92.48* F
- 29.61 inHg
- 9% Humidity
- HP: 223.98 @ 4,900 rpm
- Max HP: 224.66
- Torque: 263.44 @ 3,500 rpm
- Max Torque: 264.46
Side-By-Side Comparison:
Close-up of HP/Tq Intersection:
This was by no means a perfect test, mostly given the changes in ambient air temperature (a difference of 8.92* F), but it's better than nothing. I am led to believe that given the same ambient air temperature, the difference in power would have been slightly greater, as the open cone test was run under hotter ambient temperature. I think it is also worth pointing out that the open cone also allowed more supercharger "whine" to escape and seemed to draw the attention of more fairgoers.
