15min main
10-11-2010, 06:07 AM
#16
LOL, i used 5345 in a 15 min main, ran 1 practice lap, rx8 with 2050 t8, geared 18/46 in rc8e. I had 55mah left in my 5400 4s protek. I ran the car hard all race. Servo's also suck alot of juice as well, especially if your one of those guys who thinks you need 300-350 oz of torque. I run ae 1015, 201oz is plenty.
So I figured 15 min plus 45 sec for your warmup lap, divide by the mAh you used
Your at 339 mAh per min on your setup
That is really high in a buggy
I have had many cars and they are all right around 250-260 per min
10-11-2010, 09:22 AM
#17
Just charged the first lipo and there went 4908mah in it. The track was very loamy and the traction was really low btw.
This is a pic from the race: http://sphotos.ak.fbcdn.net/hphotos-...3_368487_n.jpg
This is a pic from the race: http://sphotos.ak.fbcdn.net/hphotos-...3_368487_n.jpg
Last edited by morgoth; 10-11-2010 at 09:33 AM.
10-11-2010, 11:53 AM
#18
10-11-2010, 12:03 PM
#19
Tech Addict
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+10 to that.
I have only seen a few over 300mah, but 339mah that alot. You could try going to a lower kv. Keeping your same batteries will help your run time's. I can't remeber what motor it was that your running. I think it was 2050, if so try a 1900 or even better a 1700.
Like REAPER, I also try to keep mine at around 200-225mah maybe 250 depending on the lenght of the race's that day.
10-11-2010, 12:12 PM
#20
If traction is down you can easily burn up a lot more battery than "normal". This is when you should be using current limiter and throttle control to prevent wheel spin. Also gearing up a tooth to tame the bottom end can also help. I've even dialed back my epa's to keep the power controllable.
10-11-2010, 12:18 PM
#21
Tech Addict
iTrader: (3)
Hey Randy,
I have wondered this for a bit. And seem to notice that when I use the current limiter. The motor itself seems to spin up slower, as you stated with some throttle control it helps' keep the wheels from spinning over.
That being said , could you use it like a traction control. Then use the EPA to help the top end from getting to wild.
I have wondered this for a bit. And seem to notice that when I use the current limiter. The motor itself seems to spin up slower, as you stated with some throttle control it helps' keep the wheels from spinning over.
That being said , could you use it like a traction control. Then use the EPA to help the top end from getting to wild.
10-11-2010, 12:35 PM
#22
I've run both the 2650kv and 1800kv on 4s 5000mah in my RC8e. I could get about 18-19 minutes on my 2650 geared 14/50. I havent run down my pack on my 1800kv geared 19/46, but I get better mileage than the 2650. Mileage on my 2650 was around 280 mah/minute. The 1800 gets about 250 mah/minute.
My RC8e with 2650 installed.
19 minutes of runtime at racepace with 2650kv on 4s 5000 geared 14/50:
2650 geared 14/50 about 280mah/minute:
1800 geared 19/46 about 250mah/minute:
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