Another Lipo, charger, setup questions
 

I have my buggy conversion complete and no batteries. I have the Tekno D8 buggy with the MMM 2200kv combo. I am running the clutch setup.

Guys, I am having a very hard time picking which Lipos to get! I don't mind spending the money to get good lithium batteries and it seems thunder power 5000 40C is the best of the best for racing. Is this true?

I want to make at least 20 minutes of hard racing as my goal. I understand a light trigger finger is always best and I plan to use that in longer races. We have a big race coming up in October and if the number of electric buggies doesn’t pick up we have to run with the Nitro guys. Sportsman A main is 30 minutes long and B main is 20. The electric main is going to be 12-15 depending on what the racers decide on.

My starting setup for the Hot Bodies D8 is as follows:

Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 48
Pinion Tooth Count: 16
Total Voltage: 14.8
Motor KV: 2200
Tire Diameter (inches): 4.5
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.006
Spur/Pinion Ratio: 3 : 1
Total Ratio: 12.9 : 1
Tire Circumference (inches): 14.14 inches (359.08 mm)
Total Motor Speed: 32560 RPM
Vehicle Speed: 33.79 mph (54.28 km/h)
Effective KV Value: 2200
KT constant: 0.61 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...


I have an 18 tooth clutch bell on the way to put me at 38mph for bigger tracks

The car will not see over 40 mph. I feel that is fast enough for racing.

There is no battery size limit for my club racing and I run with all nitro buggies (10 minute main)!

For the guys that race is my starting setup okay or would you recommend I go to a 5S setup? If so, which battery?

If I stay with 4S I want to run two 2S in series, I have a touring car and a stadium truck, what batteries do you all recommend from personal experience?

Is there another battery equal to the performance of the Thunder Power 40C?

Is 40C overkill for what I want to do?

Is 30C a safe minimum for 1/8 conversions?

Do I need to buy another charger? If so, which one? Why?(I have a hyperion AC/DC EOS606i 50W)

Do I need a power supply? If so, which one? Why?

I know this is a lot of questions, but I want to make sure I am doing this right the first time and learn from other people’s mistakes. I am trying to keep the monster happy.

Thanks in advance!
Jarvis

I'm working on a buggy now....doing some testing. I will let you know what I find out.

Your charger is fine, no need to upgrade it really- I find its better to simply buy more lipos and swap them out as required during your session, rather than have a field charging station sat on the hood of your car charging lipos inbetween sessions (thats personal opinion though).

Thunder powers are right up there really, you will be hard pressed to find many that are better; Hyperion Gen3s are getting rave reviews so it would be worth looking in them at anyrate.

Nothing wrong with having a high C rating, the more the merier generally, just depends what your wallet or wife is happy with you spending..

Any lipo that can put out 120amps or more will be more than fine (mah x C rating / 1000 = )

If you could swing a 5s setup, that should get you long enough runtimes to make the longer A main, since with higher voltage you can/need to gear down, resulting in less current draw to make a given speed & power output, so that means more runtime overall (all to do with the total power available vs how quickly you use it up).

I would suggest looking in the truggy section to see what others are doing with similar setups.