Advice on a nice fast brushless motor

[Wilfnsam]

JUST BUILDING A NEW 2 WD OFF ROAD 1/10TH BUGGY, WANTING ADVICE ON A NICE FAST BRUSHLESS MOTOR, HERE HOPING THANKS.

[paulc]

Most people use 6.5 upwards depends on driver ability track size etc i use a 7.5 speed passion plenty fast enough for me.Don't think theres any particular brand to stay away from there all decent motors Tekin,Speed Passion,LRP,HPI,Nosram the list goes on ...

[Wilfnsam]

DO THE MOTORS GET FASTER THE MORE TURNS YOU GET ?

[mattybucks]

The less turns you get the faster the motor. For a 2wd the fastest wind you will need is a 6.5t the slowest would be an 8.5t.

[blue_pinky]

They get faster the less turns you have...

...but it depends on what your using it for.

If you doing any sort of club racing or any other sort of serious racing, then you really don't want anything 'fast' as such in a 2wd. I use a Novak Ballistic 8.5t in my 2wd at nationals and it's in no way slow! It's easily fast enough if geared correctly whilst still being controllable and consistent during a race.

In a 2wd a FAST motor can just be pointlessly difficult to drive, and will only make you crash faster and harder...unless you don't mind that and are just bashing and going for all out speed anyway, in which case it doesn't matter...just don't then take it to a club and expect to be competitive lol!!!

And if you relatively new to RC, then even better to stick to something a little slower again until you have a handle on controlling it better. I ran a 10.5t motor when I started club racing, and once I could get around as quickly as the motor would allow and consistently without crashing badly for the 5 mins, only then did I go up to a faster motor.

Anyway...Enjoy

[Col]

Originally Posted by mattybucks

slowest would be an 8.5t.

That's not even close to being true.
I consider myself a reasonable driver and I run a 10.5 in 4WD indoors. The motor required is totally dependant on where it will be run.

[Jason A]

It would be nice to get some more information like how long have you raced and what car is it going in and what size track will you be running on. Just picking motor sizing out fresh air won't really help you and also having the fastest car on track won't make you the best either.

[peetbee]

Originally Posted by Jason A

having the fastest car on track won't make you the best either.

Nope, you'll just get to the next crash faster!

[mattybucks]

Originally Posted by Col

That's not even close to being true.
I consider myself a reasonable driver and I run a 10.5 in 4WD indoors. The motor required is totally dependant on where it will be run.

Sorry mate - "In my opinion" but yes you are correct, I have run a 10.5 with a "little" boost.

P.S - he did ask for a fast motor

[AmiSMB]

I think a major problem in todays brushless motor market is that a lot of manufacturers go by the turn rating but not all motors are made the same. I used to use Speedpassion V2 motors and when the V3 range came out I found that for the same wind the kv rate changed dramatically. The same goes for when I look at Jorn Neumanns setup where it states that he used a 5.5 motor well he did but it was a 5.5 V3 MMM which is around 6100kv instead of the insane 7000kv for the normal 5.5 V3 motor. This explains why he could run it in 2wd as a normal 5.5 would have been way too much, trouble is that you cannot get hold of the MMM series. I have been looking at the Tekin range and their 7.5 redline sensored is 6100kv compared to a SP V3 7.5 which is 5100kv. So if you are looking at a 2wd motor it seems that you need to run a motor anywhere in the 5000 - 6200kv range but I would say as you get closer to 6200kv you will find your laptimes reduce. I find I am much better with my SP V3 7.5 geared up than my SP V3 6.5 and if I need a bit more down the straight I just add a bit more turbo.

[sosidge]

KV is just the motors speed, what matters is POWER.

Most motors of a certain wind are fairly similar in power output, they may deliver it differently, but you compensate for that with gearing. I wouldn't buy a motor based on KV alone.

I have an 8.5 in my 2wd and it is more than fast enough for our medium-sized, bumpy club track.

[mark christopher]

Originally Posted by mattybucks

Sorry mate - "In my opinion" but yes you are correct, I have run a 10.5 with a "little" boost.

P.S - he did ask for a fast motor

then why not recomend a 3.5 turn, it will be as fast as car can go....

[mattybucks]

Originally Posted by mark christopher

then why not recomend a 3.5 turn, it will be as fast as car can go....

A 2.5 turn is faster than a 3.5 turn. Add a little boost = missile

I was recommending the motors I regulary use in the 2wd.

[AmiSMB]

Originally Posted by sosidge

KV is just the motors speed, what matters is POWER.

Most motors of a certain wind are fairly similar in power output, they may deliver it differently, but you compensate for that with gearing. I wouldn't buy a motor based on KV alone.

I have an 8.5 in my 2wd and it is more than fast enough for our medium-sized, bumpy club track.

I think you need to look at the kv rating for the top end and look at the turns for the bottom end and try and get a good mixture of both. I found at PDA when I got a 7.5 it was better than my 6.5 at doing the quads as it had much better initial torque.

[Danny Harrison]

My friend runs a 10.5T tekin system in his 2wd b4.1. On the outdoor track its only marginally slower down the straight than my 6.5T tekin system in my 4wd b44.1.

He may be overgeared a little, but there isnt masses of difference.

If you get a good quality system you have the option of limiting current, increasing timing, boosting, allsorts infact.

So my advice would be to get something middle of the road, between 8.5 and 10.5 then adjust the speed to your liking on the esc. An 8.5 will be as fast as you will ever need in a 2wd in my opinion. Likley too fast at first, but you can turn the power down

[AmiSMB]

Originally Posted by mainamigo

My friend runs a 10.5T tekin system in his 2wd b4.1. On the outdoor track its only marginally slower down the straight than my 6.5T tekin system in my 4wd b44.1.

He may be overgeared a little, but there isnt masses of difference.

If you get a good quality system you have the option of limiting current, increasing timing, boosting, allsorts infact.

So my advice would be to get something middle of the road, between 8.5 and 10.5 then adjust the speed to your liking on the esc. An 8.5 will be as fast as you will ever need in a 2wd in my opinion. Likley too fast at first, but you can turn the power down

Agreed most people when they run a lower kv or higher number of turn motor will normally adjust the gearing so that the top speed is equal or a bit less than the higher kv or lower turn motor. And these days with the ESC tuning options you can get a 10.5 to seem like a 6.5 as I have seen the Westwoods do at TORCH. The benefit with high turn lower kv motors is that you can tune them for performance but they take less current out of the batteries and you can get longer runtimes and they do not run as hot unless you really over gear them and or ramp up the boost and turbo on the ESC.

So with motors there are 4 variables that you need to look at which is number of turns, rpm/v (kv), spur gear and pinion gearing and the variable timing facility of the esc.

If you do not care about acceleration and want the fastest top speed then get the lowest turn motor with the highest kv you can buy and put on the smallest spur gear and largest pinion that you can fit to the car and wind up the esc but be carefull about the current draw through the esc and batteries as well as esc and motor temp. I did this on my ftx blaze and it was doing nearly 60mph in my road but bottom end was rubbish and ran very hot and when I tried to race with it it was useless!

[fastinfastout]

Originally Posted by AmiSMB

Agreed most people when they run a lower kv or higher number of turn motor will normally adjust the gearing so that the top speed is equal or a bit less than the higher kv or lower turn motor. And these days with the ESC tuning options you can get a 10.5 to seem like a 6.5 as I have seen the Westwoods do at TORCH. The benefit with high turn lower kv motors is that you can tune them for performance but they take less current out of the batteries and you can get longer runtimes and they do not run as hot unless you really over gear them and or ramp up the boost and turbo on the ESC.

So with motors there are 4 variables that you need to look at which is number of turns, rpm/v (kv), spur gear and pinion gearing and the variable timing facility of the esc.

If you do not care about acceleration and want the fastest top speed then get the lowest turn motor with the highest kv you can buy and put on the smallest spur gear and largest pinion that you can fit to the car and wind up the esc but be carefull about the current draw through the esc and batteries as well as esc and motor temp. I did this on my ftx blaze and it was doing nearly 60mph in my road but bottom end was rubbish and ran very hot and when I tried to race with it it was useless!

that is so wrong.

boosted setups take way more mah out of the lipo.

with a mod setup, I can use around 1200mah.

with a higher turn 13.5 with boosted setup, it can use around 2500mah, and run alot hotter.

Now to the original poster, get a 8.5 for your 2wd. If you can outdrive a 8.5, than your a mighty fine driver and people will be knocking down your door 'giving' you sponsorship haha. You will find 90% of drivers will be going 'slower' with a motor hotter than 8.5

[peteboo35]

hi m8 ive just picked up a ezrun 9t brushless combo for 60 notes from ebay
set in a b3 and its brill easy to set up and runs well and it flys but depending on ur cash limit there beta makes but for cheap power its ideal