Ask Miles, our Setup AI that’s been trained on the eCar Grey Edition.
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Gearing
Stock gearing for the JQRacing eCar Grey Edition, with common pinions and their ratios.
| Pinion | Spur ÷ pinion | FDR |
|---|---|---|
| 12T | 4.00 | 12.86 |
| 13T | 3.69 | 11.87 |
| 14T | 3.43 | 11.02 |
| 15T | 3.20 | 10.28 |
| 16T | 3.00 | 9.64 |
| 17T | 2.82 | 9.07 |
| 18T | 2.67 | 8.57 |
| 19T | 2.53 | 8.12 |
Shaded rows are the pinions most 1/8 4WD buggy setups run on the stock spur.
What pinion should I run?
Tell us your motor and track and get a starting pinion for the JQRacing eCar Grey Edition, with the range racers in the class run.
Get a recommendation →Shop pinion gears at AMain →What pinion gear should I use on the JQRacing eCar Grey Edition?
It depends on your motor and the track. In the 1/8 4WD buggy class, racers gear by final drive ratio: 1800–2300 Kv near 10.06. On the eCar Grey Edition's stock 48T spur that is about 15T for 1800–2300 Kv. Tight tracks gear down, open tracks gear up. For a starting pinion matched to your motor, use the So Dialed Pinion Recommender with the eCar Grey Edition selected.
What is the internal ratio (transmission ratio) of the JQRacing eCar Grey Edition?
The eCar Grey Edition has an internal ratio of 3.214:1. Final drive ratio = spur ÷ pinion × 3.214. With the stock 48T spur, a 12T pinion gives an FDR of 12.86 and a 19T gives 8.12.
How many teeth is the stock spur gear on the JQRacing eCar Grey Edition?
48 teeth. Changing the spur moves every pinion's ratio at once; most racers leave the spur and tune with the pinion.
Kit setup
Kit shock setup. Part numbers link to AMain.
- Front
- 350 cst
- Rear
- 400 cst
- Front
- Med-H Grey #JQB0347 →
- Rear
- Med-H Grey #JQB0348 →
- Front
- 7 x 1.2mm Flat #JQB0384 →
- Rear
- 7 x 1.4mm Flat #JQB0409 →
- Front
- 10,000 cst
- Center
- 10,000 cst
- Rear
- 3,000 cst
What shock oil does the JQRacing eCar Grey Edition come with?
Out of the box the eCar Grey Edition runs 350 cst front, 400 cst rear, on 7 x 1.2mm Flat (#JQB0384) front, 7 x 1.4mm Flat (#JQB0409) rear pistons. That is the kit setup; you will need to adjust it for your track conditions. The RC Setup App can help dial it in.
What springs does the JQRacing eCar Grey Edition come with?
The kit springs are Med-H Grey (#JQB0347) front, Med-H Grey (#JQB0348) rear. Stiffer springs suit high grip and big jumps; softer springs add grip on slick or bumpy tracks.
What diff fluid does the JQRacing eCar Grey Edition come with?
The kit diff fluid is 10,000 cst front, 10,000 cst center, 3,000 cst rear. Thicker front adds steering on power; thicker center sends more drive rearward; thicker rear stabilizes the car under throttle.
Setup Help
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Setup App & Race Log
Your JQRacing eCar Grey Edition is in the RC Setup App
Save every setup change you make to your JQRacing eCar Grey Edition, get AI tuning answers for that exact car, and log your races — at the track or back in the pits.
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