1512 2.5D vs 3D on 5S?

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Originally Posted by DRIFT_BUGGY

Well I checked over the drivetrain today and it all seems normal. I put a 12T pinion in and changed the start power to medium but won't have a chance to give it a proper run till tomorrow. I took it for a quick run in the street and it doesn't to long to get to top speed. Probably be under geared now for the track. I do notice how ever that when the motor is connected to the spur the buggy is alot harder to push and when driving it sort of feels like I am running drag brake but I have that dissabled

That maybe your issue.. you are calculating your speed wrong.. use 43/13 (3.30:1) for the 8ight buggy. At 12t you are at 44mph that is the top you would ever want that motor at iMO. To be honest 11t is a better starting point here is the calc. Looking at it the 3d would be a lot better for you on 5s as it would allow more gearing options, I don't even know if you can do an 11t pinion, at least with the Tekno v3 conversion I'm limited to a 12t as the bottom and it bearly meshes up. The 3d on a 14t is 40mph, then you can tweak up or down some... but I wouldn't buy another motor myself I would make do with the 2.5d at 12t and be happy, gearing down from what you had should reduce temps worst case run a fan on it during high heat summer. Just my2c

Just anyother tip... I run my Medusa v2 60mm 2000kv with a 15t on 4s lipo racing at 41mph at about 130 all day.. I'm sure your Neu could do the same! No nitro can even come close to me.. unless I screw up and my 4s 5k packs get 17-20minutes of non-stop racing :) LOL Just move down to 4s lipo and keep your 15t and be golden :) 4s lipo is the typical max in most sanctioned racing events anwyay (at least for now). You can usually get away with higher voltage at league races though.

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 48
Pinion Tooth Count: 11
Total Voltage: 18
Motor KV: 2050
Tire Diameter (inches): 4.5
Tire Ballooning (inches): .5
Motor Current Draw: 80
Motor coil Ω: 0
Spur/Pinion Ratio: 4.36 : 1
Total Ratio: 14.43357 : 1
Tire Circumference (inches): 17.28 inches (438.88 mm)
Total Motor Speed: 36900 RPM
Vehicle Speed: 41.83 mph (67.2 km/h)
Estimated Adjusted Speed: 40 mph (64 km/h) - 5% loss
Effective KV Value: 2050
KT constant: 0.66 oz-in/A
Motor Torque: 0.27 ft-lbs
Final Torque: 3.97 ft-lbs
Final Power: 1440 watts (1.9 HP)

• 12t-43mph
• 13t-46mph
• 14t-49mph