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-   -   Truggy & buggy same batts? (https://www.rc-monster.com/forum/showthread.php?t=25152)

superek4 12.31.2009 06:31 AM

Truggy & buggy same batts?
 
I am using 6s 3000 for truggy. My truggy is running Neu 1515/3d 1350kv. My buggy is using 2050kv neu & 4s 5000mah. I was thinking to switch to tekin 1550kv & 6s 3000mah batt?

I know more volt is good. But my races are 7-8mins only.

Using 6s 3000Mah can save cost also as both my cars can use the same batt.

btw 6s 3000 is 585g the weight of 4s 5000mah is 610g

4s 3000mah is 415g

so I m deciding weight vs volt & cost saving.

What you guys think?

superek4 12.31.2009 08:09 AM

Problem is 6s 3000 may not fit my buggy height is 41mm vs 33mm(4s 3000mah)

superek4 12.31.2009 11:09 AM

Err no one?

coolhandcountry 12.31.2009 11:46 AM

If the amperage is good on the batts I would say :yes:

superek4 12.31.2009 01:12 PM

For a 7-8min race with a 220-250amp draw per min should be enough. I calculated I should leave abt 1000mah.

That's for the 6s 3000mah. Will this overdrain the cells & cause them to bloat faster?

nativepaul 12.31.2009 01:35 PM

6s 3000mAh should work fine if you want to go that way, but if you just want to shed some weight, the 4s pack you have is very heavy, I race boats and the 4s Naviga classes have a 560g weight limit for batterys inc connectors and its not hard to find 4s 5000mAh packs of under 560g.

bdebde 12.31.2009 03:17 PM

Should be no problem with high disharge rate lipos. I run 2600 6s 30c in my buggy (Neu 1509 1450kv), 7 min. qualifiers and 10 min. main with no problems, uses less than 200mah/min. on a small track.

superek4 12.31.2009 08:40 PM

I was thinking 6s 2650mah@40c vs 6s 3000mah@40c becoz of the height diff between 36mm vs 41mm.

Small track draw less amps vs big track? Is it becoz less full throttle? How long can your 6s 2600 Mah batt last you? 12-15mins? Wats was the per cell voltage remaining?

BrianG 12.31.2009 08:56 PM

Since he's using 2600mAh cells and comsumes about 200mAh/min, he can run around 13 minutes.

superek4 12.31.2009 09:08 PM

Quote:

Originally Posted by BrianG (Post 341622)
Since he's using 2600mAh cells and comsumes about 200mAh/min, he can run around 13 minutes.

Yes u taught me how to calculate :). But what will be the voltage per cell after 13mins? 3.7v or lower?

I remembered mine after 10mins is 3.8v per cell.

BrianG 12.31.2009 09:40 PM

It will probably be around LVC, which most people set for ~3.2v/cell. After a few minutes, the unloaded voltage tends to drift back to around 3.5-3.6v/cell.

lincpimp 12.31.2009 09:43 PM

Quote:

Originally Posted by BrianG (Post 341622)
Since he's using 2600mAh cells and comsumes about 200mAh/min, he can run around 13 minutes.

Ahhh upper level math alert!!!! You must have a doctorate in Mathmatics to be able to even have the confidence to tackle such difficult equations...

So let me et this straight, 2600/200=13?

superek4 12.31.2009 09:45 PM

Will the cells get stress out around LVC? Like bloat faster?

BrianG 12.31.2009 09:46 PM

Not if you set the LVC right, that's its purpose.

superek4 12.31.2009 09:51 PM

Thx man got it

superek4 01.01.2010 04:10 AM

Buggy races allow 6s? I know china restrict 1/8 Ep buggies on 4s.

auto2 01.01.2010 10:39 AM

u think 6s in a buggy would make it too punchy and hard to drive smooth?

superek4 01.01.2010 10:44 AM

I can always set my punch lower. Now my 4s with neu 2050 I set my throttle EPA to 100% n punch to 50% very punchy n nice to drive.

SpEEdyBL 01.01.2010 09:28 PM

If you didn't read my other post, i run a Zippy 40c 4s 3000 mAh in my buggy and and makes 10 min. mains on an indoor clay track with ease. Setup is 8ight/tekin 1900. Temps are motor: 110-120F, battery: 90-100F

superek4 01.01.2010 09:49 PM

Quote:

Originally Posted by SpEEdyBL (Post 341798)
If you didn't read my other post, i run a Zippy 40c 4s 3000 mAh in my buggy and and makes 10 min. mains on an indoor clay track with ease. Setup is 8ight/tekin 1900. Temps are motor: 110-120F, battery: 90-100F

Problem is 4s with 1512/2.5 is not fast enough. My spur is 46/16(max pinion due to the meshing.

Either I change motor or change batt.

My truggy is using 6s. I think to run both cars on 6s is cost saving n both are almost the same setting.

Just thinking of 2650 or 3000mah becoz of space in the buggy.

bdebde 01.01.2010 10:00 PM

Quote:

Originally Posted by superek4 (Post 341620)
I was thinking 6s 2650mah@40c vs 6s 3000mah@40c becoz of the height diff between 36mm vs 41mm.

Small track draw less amps vs big track? Is it becoz less full throttle? How long can your 6s 2600 Mah batt last you? 12-15mins? Wats was the per cell voltage remaining?

Yes, much less time at full throttle. My local track has only one long straight where you can get full throttle. I usually have near 3.7v/cell as I have never actually hit the LVC with this car yet.

Quote:

Originally Posted by BrianG (Post 341622)
Since he's using 2600mAh cells and comsumes about 200mAh/min, he can run around 13 minutes.

I have run about 12 to 15 min: 10 min main with a few warm up laps and sometimes a little playing after, still yet to hit the LVC though. After 7 min. qualifier I use 1200 - 1600 mah, 10 min. main uses about 1800 - 2300 mah

Quote:

Originally Posted by superek4 (Post 341671)
Buggy races allow 6s? I know china restrict 1/8 Ep buggies on 4s.

Local race series allows any batteries, they do have a 4s limit for the regional series that comes around a couple times a year.

Quote:

Originally Posted by auto2 (Post 341682)
u think 6s in a buggy would make it too punchy and hard to drive smooth?

With proper kv motor, it is no different than 4s, except you do get a bit more punch since the voltage drops less under acceleration. Also, everything runs super cool.

superek4 01.02.2010 02:12 AM

Amazing are u using 6s 2600 for your muggy too?

bdebde 01.02.2010 04:13 AM

No, I use 4100 and 4300 6s in the Muggy.

superek4 01.02.2010 04:35 AM

I m intending to use 6s 2650 on my truggy, my truggy only consume 200amp per min. My mains n heats is only 7-8mins. No more carrying dead weight:)

scarletboa 01.03.2010 11:31 PM

just be sure to get the 40c packs. i recommend the turnigy packs over the flightmax packs as they tend to have a little lower resistance and they stay balanced easier.

superek4 01.03.2010 11:50 PM

Turnigy is longer right? My batt tray can only fit flightmax.


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