1400KV motor on a 8S LiPo
A 1400KV motor on 8S turns about 41,440 RPM at 29.6 V nominal and 47,040 RPM on a fresh 33.6 V pack. Geared at 12:1 on 4.3 in tires, that is a 44.2 mph ceiling.
HOOVO 6S Lipo Battery 22.2V 100C 5200mAh with EC5 Connector (2
- 6S
- 5200mAh
A 8S LiPo is 29.6 V nominal and 33.6 V full, which is what sets the RPM on this page.
$146.99 listed price, changes often
Check price on AmazonWhat RPM does 1400KV make on 8S?
| Pack state | Volts | Motor RPM |
|---|---|---|
| Nominal (3.7 V per cell) | 29.6 V | 41,440 |
| Fresh off the charger (4.2 V per cell) | 33.6 V | 47,040 |
This is the classic 1/8 scale 6S pairing: modest KV, high voltage, big torque. KV is unloaded RPM per volt, so real RPM under load is lower. See RC motor KV explained.
What top speed can 1400KV on 8S reach?
Theoretical ceiling in mph by final drive ratio and example tire diameter. Real cars usually reach about 85 percent. Measure your own tires and use the top speed calculator for an exact figure.
| FDR | 3 in 1/18 to 1/16 truck | 4.3 in 1/10 short course or stadium truck | 5.5 in 1/10 monster truck | 4.4 in 1/8 buggy | 6.3 in 1/8 monster truck (3.8 in wheel) |
|---|---|---|---|---|---|
| 6:1 | 61.6 | 88.4 | 113 | 90.4 | 129.4 |
| 8:1 | 46.2 | 66.3 | 84.8 | 67.8 | 97.1 |
| 10:1 | 37 | 53 | 67.8 | 54.2 | 77.7 |
| 12:1 | 30.8 | 44.2 | 56.5 | 45.2 | 64.7 |
| 16:1 | 23.1 | 33.1 | 42.4 | 33.9 | 48.5 |
| 25:1 | 14.8 | 21.2 | 27.1 | 21.7 | 31.1 |
| 40:1 | 9.2 | 13.3 | 17 | 13.6 | 19.4 |
Other cell counts for 1400KV
Other motors on 8S
Motors near this KV and packs for this cell count
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Frequently asked questions
How fast is a 1400KV motor on 8S?
The motor spins about 41,440 RPM unloaded at 29.6 V. Road speed depends on gearing and tire size: at a 12:1 final drive with 4.3 in tires the theoretical ceiling is 44.2 mph, and real cars usually reach 80 to 90 percent of that. The table on this page shows the ceiling across common gearing and tire sizes.
Can I run a 1400KV motor on 8S?
Only if the motor and ESC are rated for 8S and the full-charge RPM of 47,040 is within the motor's maximum. This pairing stays under 50,000 RPM, which most suitable motors handle. Gear conservatively at first and check temperatures after a few minutes.
RCCarCalc is researched guidance, not professional advice. Figures come from published manufacturer specifications, listings and verified owner reports, not hands-on testing. Speeds are theoretical or as listed; real results depend on gearing, battery, tires and terrain. See how we research.