Lrp sphere with 1s lipo cogging

[SDARCY118]

Hi all

i have being racing my Mardave v12 for a while using 4cell Nimh battery with a 13.5 gm motor , lrp sphere Esc (not tc btw but don't know which one it is as there two others i belive non boost version) and no diff. which has being pretty good but i wanted to change to Lipo.

Today i brought a 1s Lipo to try it out, first off i change the cut off to nimh not lipo, but iam still have problems..

when i apply full power from stand still its never stops cogging, if i apply 50% power it dosent cog and once i built some momentum i then apply full power..is there anyway to fix this.:)


Cheers

Sam D'Arcy:woot:

[Chequered Flag Racing]

Your going to need to run a voltage booster or receiver pack with the esc to provide the correct voltage to receiver to start.

Have you changed the gear ratio to suit the 1s LiPo?
What pinion, spur, tyre size are you running?

[Paulnuneaton]

Are you running 32 dp or 64 dp and like Glen said have you checked your gear ratio

[SDARCY118]

32dp no diff(though may get one soon)

gearing 46t spur and 16t pinion tyre diameter rear=47mm,front 44mm

[SDARCY118]

also anyone got any experience with one of these booster seen as it only £5 from hong kong

http://www.hobbyking.com/hobbyking/store/__7884__Voltage_Booster_for_BEC.html

Cheers

Sam D'Arcy

[Chequered Flag Racing]

32dp no diff(though may get one soon)

gearing 46t spur and 16t pinion tyre diameter rear=47mm,front 44mm

51.36mmpr on 16/46 x 47mm

diff won't affect cogging

[Chequered Flag Racing]

also anyone got any experience with one of these booster seen as it only £5 from hong kong

http://www.hobbyking.com/hobbyking/store/__7884__Voltage_Booster_for_BEC.html



Not any experience myself with those but have heard/read the cheap and cheerfull can be OK

[SDARCY118]

thanks for the reply..what gearing..do you recommend i start with for 13.5,1s lipo and 48dp because i will be getting a diff soon:thumbsup:

Cheers

Sam D'Arcy

[Paulnuneaton]

if you are going for a diff mate why not change up to 64dp will give you more options for gearing you can find out the gearing a gearcharts.com.

[Chequered Flag Racing]

Stick with 48dp unless your an experinced racer. 48's more robust. :thumbsup:

[Paulnuneaton]

Thats true Glen but it also opens up a load of options as well mate for himm to gear for diffrent tracks. what i liked about 64 so smooth gears and the car sounds silent but again it gave me a greater range in set ups.but i also run 48 as well to be honest the 48 is more robust as well

[SDARCY118]

ok thanks guys for the advice... just try to run the car WITHOUT a pinion and its still cogs..is that because i haven't got a booster or is that somthing worse.

[Chequered Flag Racing]

you have fitted the sensor lead haven't you ;)

try another sensor lead

try on 2s LiPo

[Chequered Flag Racing]

51.36mmpr on 16/46 x 47mm

diff won't affect cogging

just searched Mardave thread for mmpr and back in April I had mine on 67.32 mmpr

[SDARCY118]

you have fitted the sensor lead haven't you ;)

try another sensor lead

try on 2s LiPo


lol yes of course i have checked using a 4cell nimh and it works fine thanks anyway

[TOMO WEF]

To get rid of the cogging on the Lrp sphere you do need a booster and the heatshrinked capacitor that comes with it originally.
I use the nosram matrix which is the same speedo but in red and I had the same problem and a £24.95 booster from amc sorted it out.

[SDARCY118]

cheers tomo..ok one booster to order:thumbsup:

[nick8155]

I'm in the same boat as Sammy.....Ive got a mamba max pro in my Dave....works fine with 4 cell Nimh but with 1s Lipo the wheels won't even turn! even with the Novak Smart Boost. I dont reckon the MMP will function with 1s....Have any of you guys tried?

I think I might just buy the Hobbywing 1s

http://www.ebay.co.uk/itm/HobbyWing-Xerun-120Amp-1s-ESC-Built-6v-Booster-/180757195223?pt=UK_ToysGames_RadioControlled_JN&hash=item2a15f7e9d7

Hit 2 birds with 1 stone ;-)

[Chequered Flag Racing]

mamba max pro in my Dave....works fine with 4 cell Nimh but with 1s Lipo the wheels won't even turn!


try these settings from a 1s Mamba Max that were given to me for my 12th car

Blinky
Auto lipo 3.0v
without reverse
brake amout 100%
drag 0
punch 0
arming 1sec
dead band very small
sensored
start power high
throttle curve take from linear start from where the curve is on the 50 and move to the 7th box on 40

[SDARCY118]

91x6OWFBHSM&context=C3f87b94ADOEgsToPDskLrHCY82xTfoR9oCoJHIzsv

[SDARCY118]

sorry about the blank reply above how do you upload you tube video's?

[Chequered Flag Racing]

sorry about the blank reply above how do you upload you tube video's?



Click on the Video icon http://www.oople.com/pixels/youtube.gif when you start a new post. Then insert the video id only between the brackets

using this link (http://www.youtube.com/watch?v=Ti9MkZxEKhE) you would only use Ti9MkZxEKhE

[SDARCY118]

thanks m8 my problem uploaded now