Harrop Supercharger Real Dyno Results at Oztrack
Over the past 3 years we have completed a large number of Harrop supercharger packages on Holden and HSV LS vehicles at Oztrack.
These combinations have included:
- Harrop FDFI2300
- Harrop FDFI2650
- Harrop 2650i
- Oztrack HP3, HP9 and HPS camshaft packages
- DPE and Manta exhaust systems
- Mainline ProHub dyno tuning
One of the biggest questions customers ask is:
“What power do these combinations actually make in the real world?”
The data below comes from real Oztrack dyno results.
Oztrack Harrop Dyno Results
| Supercharger | Cam | Cars | Avg rwkW | Max rwkW | Avg Nm | Max Nm |
|---|---|---|---|---|---|---|
| FDFI2300 | HP9 | 11 | 512 | 541 | 779 | 830 |
| FDFI2300 | 224/230/114 | 4 | 502 | 520 | 730 | 800 |
| FDFI2300 | HP3 | 9 | 499 | 541 | 769 | 824 |
| FDFI2300 | HPS | 3 | 520 | 522 | 782 | 796 |
| FDFI2300 | HP1 | 1 | 481 | 481 | 774 | 774 |
| FDFI2300 | LSV | 1 | 478 | 478 | 725 | 725 |
| FDFI2650 | HP9 | 1 | 520 | 520 | 784 | 784 |
| FDFI2650 | HP-SC3 | 1 | 550 | 550 | 798 | 798 |
| FDFI2650 | 232/238/112 | 1 | 503 | 503 | 833 | 833 |
| 2650i | HP-SC3 | 2 | 572 | 582 | 870 | 881 |
| 2650i | HP9 | 5 | 533 | 552 | 833 | 850 |
| 2650i | HP3 | 2 | 539 | 549 | 842 | 866 |
| 2650i | 238/254/120 | 1 | 635 | 635 | 1001 | 1001 |
What the Data Shows
HP9 is one of the strongest repeating Harrop combinations
The FDFI2300 and HP9 combinations repeatedly produced:
- Around 500-540 rwkW
- Around 750-830 Nm
- Strong repeatability across multiple vehicles
This has made the HP9 one of the strongest proven street and strip combinations we tune regularly.
We recommend the use of our new cam the Oztrack HP-SC3 for 6/6.2L FDFI2300 and FDFI2650 builds. It is superior to the HP9.
HP3 is extremely strong for a balanced street setup
The HP3 combinations consistently produced:
- Around 500 rwkW
- Very strong torque
- Broad power delivery
- Strong drivability for street use
This is one reason the HP3 remains one of the most popular blower cams we use.
The 2650i sits above the 2300 combinations
The 2650i combinations clearly produced:
- Higher average rwkW
- Stronger upper RPM power
- Larger airflow capacity
- Strong torque retention at higher RPM
The strongest combination in the data produced:
- 635 rwkW
- 1001 Nm
Supporting Modifications Matter
The strongest combinations typically included:
- DPE or Manta exhaust systems
- High-flow cats
- VCM or Harrop OTR intake systems
- Fuel system upgrades
- Automatic transmission tuning
- Converter upgrades in some vehicles
Why We Use the Mainline ProHub Dyno
All tuning and testing was completed on our Mainline ProHub dyno at Oztrack in Penrith NSW.
The ProHub dyno allows accurate load control, repeatable testing and detailed calibration under real load conditions.
Choosing the Right Harrop Package
The best Harrop combination depends on:
- Engine type
- Gearbox
- Fuel type
- Exhaust setup
- Intended use
- Power goal
- Street vs race usage
Some customers want:
- Strong street torque
- Factory-like drivability
- Mild idle
- Reliable 500 rwkW combinations
Others are chasing:
- Maximum power
- Larger camshafts
- E85 fuel systems
- Engine builds
- 600+ rwkW combinations
Oztrack Harrop Packages
Oztrack can supply and fit:
- Harrop FDFI2300
- Harrop FDFI2650
- Harrop 2650i
- Fuel system upgrades
- Camshaft packages
- CNC ported heads
- In-house engine builds
- Mainline ProHub dyno tuning
We also offer Australia-wide remote tuning support using AutoCal devices.
Contact Oztrack
Oztrack Engines and Tuning
Penrith, Sydney NSW
Phone: 02 9119 3895
Website: https://oztrack.com.au
