Brushless ?

[Chris Doughty]

Originally Posted by sefton

Whats the best way to make it faster then?

it needs to be seen in person to guage if it is running 'as fast as it should'

what kind of speeds are you getting? is it similar to a 10 turn brushed motor?

[sefton]

Thats difficult for me to answer as I'm a newbie to electric buggies!

at a guess I would say its no quicker than a 10 turn.

Its just I read that these things are stupidly quick, but mine isnt!

Dont get me wrong as a newbie its fast enough at the moment.

[MikePimlott]

Na craig, its deffinatley not as fast as ive seen them, I run my brushless with a 20T pinion and the 81T spur. I think thats the best Way you can get it faster.

Go up 1 pinion size at a time and see if the motor is getting red hot after a run and what the speed increase is like.

[Barry Williams]

My son runs a GTB 5.5 in his B4 on 81/20 gearing & it goes really well, but be aware that it`s not just the motor that gets hot, the speed controller is where we`ve had probs in the past with it overheating & the thermal cutout stops or slows the car dramatically. I have recently had to cut the body shell to allow more airflow to try to cool things down.

[sefton]

Yeah going to try a 19pinion and see how that is!

Should be ok for cooling as I've got quite a few air vent in the shell.

Cheers

Craig.

[Rob]

Is your slipper maybe slipping?

[Chris Doughty]

Originally Posted by Barry Williams

My son runs a GTB 5.5 in his B4 on 81/20 gearing & it goes really well, but be aware that it`s not just the motor that gets hot, the speed controller is where we`ve had probs in the past with it overheating & the thermal cutout stops or slows the car dramatically. I have recently had to cut the body shell to allow more airflow to try to cool things down.

Indeed, most of the 'work' in brushless setups is done by the speedo, that is normally the thing that will over heat.

[sefton]

Not sure about the slipper, it just set to the factory settings (4 turns from the top of the shaft).

Craig.

[Bathy]

Originally Posted by Barry Williams

My son runs a GTB 5.5 in his B4 on 81/20 gearing & it goes really well, but be aware that it`s not just the motor that gets hot, the speed controller is where we`ve had probs in the past with it overheating & the thermal cutout stops or slows the car dramatically. I have recently had to cut the body shell to allow more airflow to try to cool things down.

Does the fan not keep up with the heat then?

I have an old SS5800 novak brushless and I had to fit my own fan on that to stop it cutting out, I thought these new ones wouldn't suffer from cutting out. For 2007 I'm going to move away from brushed altogether and so will be looking for a new brushless system, torn between Novak & LRP might be worth waiting until the end of the year I guess.

2007 better see the end of silly rules such as stopping ‘BRCA approved’ Brushless motors at nationals

:flower:

[DCM]

There will be another system running by then Dave, and one aimed at off-road to, as most of the brushless systems are designed around the touring car market, hence most of the motors are not suitable for off-road or the power mapping of the software.

[Chris Doughty]

Originally Posted by DCM

There will be another system running by then Dave, and one aimed at off-road to, as most of the brushless systems are designed around the touring car market, hence most of the motors are not suitable for off-road or the power mapping of the software.

I don't know of a more suitable off-road system than the LRP one, no one is making you buy the 'fast' brushless motors, LRP have a 1-star if you want smooth driveable wide power band (but not as much top speed)

the Sphere comp even has a 'low traction' setting, this is completely useless for a touring car, it was put in for off-road, low traction dirt.

its not like LRP have 2 seperate brushed speedo's, one for snoring car, the other for off-road.

[sefton]

Theres already a whole host of different motors & speedo's avalible to suit most types of driving class.

[OldTimer]

Originally Posted by Bathy

2007 better see the end of silly rules such as stopping ‘BRCA approved’ Brushless motors at nationals

:flower:

David, if you cannot use brushless at the Nationals next year, i wont be doing them. I will give you my thoughts about the LRP system after the weekend when it gets its first test

I understand that the Novak motors will work fine with the LRP Comp speedo, so that allows you more choice on the motor front.

[DCM]

I think where I got mis-interpretd, the throttle and power mapping for an on-road car would and IS different to a buggy, as grip, tyres and everything is different. With brushed, you would buy motors with different winding techniques to alter how a motor reacted and gave it's power, not with Brushless, as it is the magnets that rotate and not the windings, you have to alter how a motor 'feels' with, easiest way to describe it, is like engine mapping in your car. You can have the same engine but alter the ignition timming and fuel input to get the engine to have differing characteristics.

Brshless is somewhat the same, and as the visible market initialy has been touring cars, thats what the profiles have been aimed at, and the motors. So a slightly different approach on the throttle mapping is needed for off-road to make the units more driveable.

[MattW]

Depends how you mean aimed at "Off Road". I mean, if it's from the US, then you're looking at 2wd fairly low traction dirt. Which is nothing like what we race on at the majority of tracks.

You're kind of right when you say that most of the brushless stuff is aimed at touring car racing. However, i can't help thinking that this is actually much cl oser to 4wd high traction that the other scenario i mention. I suspect that a 5.5 or similar would be quite good in 4wd. From what i've seen.

[DCM]

Maybe, I can't help but think after seeing a few B4's go with Novak Brushless in them, they seem waaaaaay over powered even for grass, guess you will STILL have to invest in a few motors though.

[Chris Doughty]

but the LRP sphere does have 'low traction' 'off-road' maps, it also has Aggressive Touring car maps.

also, I don't think LRP's 1 or 2 star brushless motors were developed for 'mod' Touring car racing, they can't be used in stock or super stock, what do you think they were developed for?

LRP can't stop people buying 4-star motors and running them in off-road on low traction dirt. or slippy grass.

[OldTimer]

Its a shame LRP don't give more info about the motors on there website, i think if they listed the different motors and winds, it would help people select the correct wind. I wonder if this is why people may get the 4 star and not realise how low a wind it is

I guess you are going to show were on the site the info is now lol

[Chris Doughty]

Originally Posted by OldTimer

Its a shame LRP don't give more info about the motors on there website, i think if they listed the different motors and winds, it would help people select the correct wind. I wonder if this is why people may get the 4 star and not realise how low a wind it is

I guess you are going to show were on the site the info is now lol

I don't have the info, but I thought somewhere it stated that the star rating is the 'speed' of the motor, more stars, faster the motor, and it does say that the 3-star is similar to a 9 turn brushed

[DCM]

I don't understand why they just don't rate the motor by it's RPM per volt, which is how they are doing it in the other classes of brushless, so you have say a 5.4KV motor, which is 5,400rpm per volt, so put 7.2v to it and it will rev free-load at 38,880rpm you can then have some sort of 'comparison' rather than the 'mystery' of it being an equivalent to a x turn motor.