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rc8be 2650kv on 4s too much?

rc8be 2650kv on 4s too much?

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Old 11-30-2010, 07:41 PM
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Way too much, most people are running 1700
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Old 11-30-2010, 08:00 PM
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Originally Posted by Reubster24 View Post
Yeah i saw those and i'm thinking that and a 5s would be pretty nice! what you guys think? 33300RPM.
What size pinion would you guys use with the 44t spur?
With an 1800 I would personally start low (15 tooth).

My Losi 8ight-e 2 runs a 1700 with a 16 tooth and I run it on 4s (which is directly from the Adam Drake setup).

Last time I checked my name was not recognizable so I will use Adam's name LOL!

http://www.losi.com/ProdInfo/Files/L...6_DrakeStd.pdf
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Old 11-30-2010, 09:24 PM
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Default Wicked Fast.

I have the RC8E with 2650kv castle on 4s thunder power lipo. It is a really fast car and punch needs to be dialed down to control excess wheel spin. It is nearly impossible to hit the sweet spot on the track with the 2650.

I just recently sold my used 2650 for $70 and purchased castle's clearance 1800kv motor for $60 brand new.

The benefit of lower kv motors is that they run a lot cooler and allow for longer
run times. Lower kv has more lower end torque as well.
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Old 12-01-2010, 08:07 AM
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I ran my RC8e on 4s with a 2650 geared 14/50 and it was fine. I ran that for about a year then tried the 1800 on 4s geared 19/46. The overall speeds are very close, but the 1800 is much smoother and easier to control. My 1800 gets much hotter than my 2650.
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Old 12-01-2010, 09:14 AM
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Default Out with 2650 in with 1800

Will i decided to take advantage of castles deal on the 1800kv motor. Sold the 2650kv last night. Only thing is now i have to figure out how to gear the 1800 on 5s. Can you get a spur for the rc8 smaller than 44t? The largest pinion i can put on is a 18t because i have the tekno conversion.
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Old 12-01-2010, 09:48 AM
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Originally Posted by Reubster24 View Post
Will i decided to take advantage of castles deal on the 1800kv motor. Sold the 2650kv last night. Only thing is now i have to figure out how to gear the 1800 on 5s. Can you get a spur for the rc8 smaller than 44t? The largest pinion i can put on is a 18t because i have the tekno conversion.
You should still be able to run 1800kv on 4s okay. Just go to scriptasylum and calculate what you need.
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Old 12-02-2010, 01:15 PM
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Originally Posted by quixoticboi View Post
You should still be able to run 1800kv on 4s okay. Just go to scriptasylum and calculate what you need.
Alright guys i have been looking at scriptasylum and it brings up another question. How fast is good for racing. I wanna figure out what pinion to get and the tekno long shank pinions are to much to just buy them all. Thanks in advance guys.
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Old 12-02-2010, 01:17 PM
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Originally Posted by Reubster24 View Post
Alright guys i have been looking at scriptasylum and it brings up another question. How fast is good for racing. I wanna figure out what pinion to get and the tekno long shank pinions are to much to just buy them all. Thanks in advance guys.
Go for about 40mph. Also, make sure you calculate at full charge (4.2v/cell) and slightly less (4.0v/cell), because you'll discharge as you run. Some go around 41-42mph full charge and right at 40mph at 4.0v/cell.
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Old 12-02-2010, 01:27 PM
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Originally Posted by Reubster24 View Post
Alright guys i have been looking at scriptasylum and it brings up another question. How fast is good for racing. I wanna figure out what pinion to get and the tekno long shank pinions are to much to just buy them all. Thanks in advance guys.
40mph at most, but depending on the track, you may not really need more than 33mph or so. The one main outdoor track I run at has about a 175-200 foot front straight, so 40 +/- works very well. However, our indoor track which is pretty large with a 125 foot straight really doesn't need more than about 33mph or so
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Old 12-02-2010, 01:29 PM
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Originally Posted by Edumakated View Post
40mph at most, but depending on the track, you may not really need more than 33mph or so. The one main outdoor track I run at has about a 175-200 foot front straight, so 40 +/- works very well. However, our indoor track which is pretty large with a 125 foot straight really doesn't need more than about 33mph or so
Yes, indeed. Should have mentioned I was referring to a larger outdoor track (rev).
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Old 12-03-2010, 04:40 PM
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Originally Posted by quixoticboi View Post
make sure you calculate at full charge (4.2v/cell) and slightly less (4.0v/cell), because you'll discharge as you run. Some go around 41-42mph full charge and right at 40mph at 4.0v/cell.
Unless those calculators account for voltage sag I would plug in nominal voltage, about 3.7. No battery will maintain 4 volts/cell for more than a small fraction of the discharge even at moderate loads. 3.7 will give you a decent average voltage.

http://www.rcgroups.com/forums/attac...mentid=3385986
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Old 12-03-2010, 06:26 PM
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Originally Posted by fishboy77 View Post
Unless those calculators account for voltage sag I would plug in nominal voltage, about 3.7. No battery will maintain 4 volts/cell for more than a small fraction of the discharge even at moderate loads. 3.7 will give you a decent average voltage.

http://www.rcgroups.com/forums/attac...mentid=3385986
Mine usually get down to 3.7v/cell (or just a little lower) after one heat...
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Old 12-03-2010, 06:38 PM
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So what would a 2650 on 3s be geared at??
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Old 12-03-2010, 06:39 PM
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All depends on the car.
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Old 12-03-2010, 08:07 PM
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Originally Posted by quixoticboi View Post
All depends on the car.
Rc8be
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