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-   -   8ight 1.0 buggy (https://www.rc-monster.com/forum/showthread.php?t=22331)

Mentat 07.16.2009 08:26 PM

8ight 1.0 buggy
 
Well, looks like i may be getting a 8ight 1.0 buggy race roller tomrw, and i was wonder how would it be if i ran it with the following:

CC Mamba Monster 2650kv
3s1p 5000mAh 25c or 30c pack

2650x11.1=29415

Would this push around an 8ight 1.0 on a track and compete with nitros? its almost 30k rpms

brushlessboy16 07.16.2009 08:40 PM

pwould be fine if you gear it correctly. I have ran a buggy with that exact setup- ran great- plenty of Go to keep up with the noise makers

Mentat 07.16.2009 08:49 PM

any ideal on the gear i should use? Im picking this kit up tomrw

brushlessboy16 07.16.2009 09:01 PM

Gear for about 38mph. should be plenty and you can out accelerate the gas guzzlers

Mentat 07.16.2009 11:25 PM

would a 3s1p 5000mAh 20c pack be enough? or does it need to be 25c/30c

BL_RV0 07.16.2009 11:33 PM

Since it's a 3s setup 25c would be the minimum.

Mentat 07.16.2009 11:38 PM

Quote:

Originally Posted by BL_RV0 (Post 305198)
Since it's a 3s setup 25c would be the minimum.

Why do you say that? 5000x20=100000 / 1000= 100amps

that isnt enough? or am i missing something here?

Wild YFZ 450 07.17.2009 12:13 AM

Quote:

Originally Posted by Mentat (Post 305199)
Why do you say that? 5000x20=100000 / 1000= 100amps

that isnt enough? or am i missing something here?

Nope, the system is around 125-150 amps, 5k-x-25c( 30c burst )= 125amp/(Burst-150amp)

ZippyBasher 07.17.2009 12:24 AM

I doubt geared for 38 would pull anywhere near 125 amps continous. I say the zippy 20/30burst is fine, my .02

drkdgglr 07.17.2009 12:55 AM

If you are peaking at 100-125 amps, the voltage of a pack rated for 100amps will drop = less speed.

If you get a 30c or higher rated 3s5000mah pack, you'll get 150a continuous and the batt will hold it's voltage better. Take a look at the hyperion35c thread on this forum. At 20c these packs hold 3.7v per cell.

Use the speedcalc and see how voltage drop affects your speed.

lincpimp 07.17.2009 01:04 AM

Nitrofarter ran a jammin buggy with a mmm/2650 combo on 3s 4900 rhino lipos and it worked fine. Something like 14-15min runtimes?

zeropointbug 07.17.2009 01:08 AM

Is there a reason you want to run 3s?

Mentat 07.17.2009 01:20 AM

Quote:

Originally Posted by zeropointbug (Post 305237)
Is there a reason you want to run 3s?

I have 4 x 4s1p 5000mah 25c packs for my truggy. I wanted to run the 3s packs because they are 29.99 on hobbycity for the 3s1p 5000mah 20c, you cant beat that price. then i wont have to share my truggy packs. Or i can get 3s1p 5000mah 25c packs for $43 just trying to save money is the main thing, so if 20c will work then im game, if not then ill go with the 25c packs. So will 20c do the job and not burn up anything or do i HAVE to have 25c? thanks

nitrostarter 07.17.2009 01:23 AM

Quote:

Originally Posted by lincpimp (Post 305235)
Nitrofarter ran a jammin buggy with a mmm/2650 combo on 3s 4900 rhino lipos and it worked fine. Something like 14-15min runtimes?


Sure did. Those Rhino's are 20C's as well. 14 minutes of track time before hitting the LVC.

Now I did run the 2650 on 4s as well. It was very quick but I also changed the gearing for about the same speed as 3s. I ran that with 4s 4500 30C FP's.

I have a 8ight-B now with the Tekno V3 kit. I'm running a 1515/1Y on 4s geared 14/47 and its insanely quick and cool!

Mentat 07.17.2009 01:38 AM

nitro starter, IF i go with the 20c packs what gearing should i use Spur?/Pinion? I even thought about running them in 3s2p config to get 10,000mAh out of them. Thoughts on this?

nitrostarter 07.17.2009 01:42 AM

Are you bashing or racing? Depends on what u want to do...


Use this:
http://scriptasylum.com/rc_speed/_top_speed.html

Plug in the numbers and figure out your gearing for about 38mph... That should be plenty to bash and race with.

Mentat 07.17.2009 01:44 AM

will do, didnt know if u had specifics that you could pass along since u ran this setup before

zeropointbug 07.17.2009 02:45 AM

Why don't you just run the 4s packs, I'm sure the truggy is not going to care about sharing.

Mentat 07.17.2009 03:14 AM

i dont know the truggy is pretty mean at times. I would rather the buggy had its own packs, that way my wife can run with me and not have to worry. so can 20c do it or does it need 25c

SpEEdyBL 07.17.2009 06:43 PM

Why don't you just get more 4s packs you can interchange them and still have enough for each vehicle? The CC2650 will do fine on 4s geared way down (like an 11-12 tooth pinion), but it will still draw a lot of amps and give you short runtimes. I personally have switched to the Tekin T8 1900 kv buggy motor which is much more suitable for racing on 4s. But if you want to save money, the 2650 combo is cheaper than buying an esc and motor separately and 3s is the most suitable for racing with that motor.

zeropointbug 07.17.2009 08:23 PM

There is no use even asking the question 3s or 4s, the higher the voltage the better. Just go with 4s, and be done with it, keep it simple.:smile:

scarletboa 07.18.2009 12:29 AM

just spend $40 and get a 4s turnigy 5000mah lipo. if geared for the same speed as 3s, it will draw less amps.

whether you use 3s or 4s, the turnigy 20c packs will do just fine. most people i know who have them claim they are 25c or even 30c. if you MUST run 25c, just spend $43 and get the 5000mah 3s 25c packs. (i have the 25c flightmax packs which are the same except for the discharge wires and the max i have temped them on my 17-18lb savage geared for 50mph is 102F)


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