VehiclesHPI Racing WR8 Flux 2001 WRC Subaru Impreza RTR
HPI Racing WR8 Flux 2001 WRC Subaru Impreza RTR
1/8 scale · rally · 160943
- Top speed
- 41mphcalculated
- Final drive
- 9.44:1
- Tire
- 80mm
Specifications
Last modified
| Spec | Value | Basis |
|---|---|---|
| Vehicle | ||
| Class | Rally | |
| Drive | 4WD | |
| Power | Brushless | |
| Build | Ready to run | |
| Scale | 1/8 | |
| Part number | 160943 | |
| Drivetrain | ||
| Pinion | 15TStock | Stock |
| Spur | 46TStock | Stock |
| Transmission & axle | 3.08:1Derived | Derived |
| Spur ÷ pinion | 3.067:1Calculated | Calculated |
| Final drive | 9.44:1Stock | Stock |
| Wheels & tires | ||
| Tire diameter | 80mmStock | Stock |
| Rollout | 26.6mm per motor turnCalculated | Calculated |
| Wheel hex | 12 mmStock | Stock |
| Power | ||
| Motor | 3700KVStock | Stock |
| Battery | Up to 3SLiPoStock | Stock |
| Stock motor | FLX10-3660-3700KVStock | Stock |
| Stock ESC | FLX-10 3S802Stock | Stock |
| Battery connector | XT-60Stock | Stock |
| Performance | ||
| Theoretical top speed | 40.8mph on 3SCalculated | Calculated |
| Motor speed | 41,070rpm, no loadCalculated | Calculated |
| Chassis | ||
| Length | 485 mm19.1 inStock | Stock |
| Width | 227 mm8.9 inStock | Stock |
| Height | 172 mm6.8 inStock | Stock |
| Wheelbase | 300 mm11.8 inStock | Stock |
Stock is as the vehicle ships. Calculated is worked from the stock figures on this page rather than stored beside them, so the two cannot drift apart. Derived is worked out from gear tooth counts the maker publishes rather than printed as a ratio; the notes below say how. The top speed is kinematic: an ideal no-load RPM with no slip and no loss under load, so a real car is slower.
Gearing parts
| Component | Teeth | Pitch | Bore | Part number |
|---|---|---|---|---|
| Fitted at the factory | ||||
| Pinion | 15T | Mod 1 | 3.175 mm | 108267 (opens in a new tab) |
| Spur | 46T | Not published | Not applicable | 66654 (opens in a new tab) |
Tooth counts are the ones in the specifications above. Pitch is given as metric module (Mod 1, Mod 0.8) or diametral pitch (32P, 48P). They are different standards and are not interchangeable, even where the numbers look close. Bore is the pinion’s hole, listed separately from the motor shaft. Linked part numbers go to the maker's or official distributor's page for that part.
How these numbers were settled
Full-time shaft-driven 4WD electric rally car marketed as a return of the WR8 family.
- It uses a FLX10-3660-3700KV brushless motor and a Flux ESC that runs on 2S or 3S LiPo.
- HPI's own standard-parts listing for this kit names a 15-tooth pinion, a 46-tooth spur, and a 40-tooth to 13-tooth differential bevel pair, giving a 3.077 to 1 reduction after the spur and a 9.44 to 1 final drive.
- The tire is stated as 80mm across, the same size as the WR8 Flux Rally.
Sources
- 160943hpiracing.com (opens in a new tab)
- stdhpiracing.com (opens in a new tab)
- 108267hpiracing.com (opens in a new tab)
- 66654hpiracing.com (opens in a new tab)
- 101215hpiracing.com (opens in a new tab)
- 101216hpiracing.com (opens in a new tab)
Every figure on this page traces to one of these. Where they disagreed, the note above says which was used and why.