leopard 4074 or 4082 OR 4092 ?

[Rcforever27]

hey guys ! its been awhile since ive been on the forums, but i have a new designedspartan hull tht i built from a bare hull.... ok so i have a jeff wohlt .150 flex cable, a castle hydra ice 240 esc, and my last run was with a octura x440 prop.... and im, running traxxas 8400 mah 25c lipos 11.1 volts in series . also i have currently a 4074 leopard 1800 kv motor my best speed with the x440 prop was 47 mph..... i know i have some trimming to do ..... but i was poking around on this forum and the traxxas forum and saw a couple guys running a leopard 4082 and a 4092 motor.... the 4092 was a 1800 kv...and the 4082 was a 1600 kv.... which do you guys recommend for more speed? im only worried abt my batt temps at this point.... but i needddd more speeeddddd lol....i did try a prather 215 prop and only hit a max of 45 mph..... thanks for any info guys!and im glad to be back on here!!!!

[Jeff Wohlt]

You will be getting close to BANG on a 150 cable if you put too much more to it. It can handle the power but when she hops in and out of the water is when it can go...just FYI

[Rcforever27]

I agree 100% Jeff ,but I have like 3 of your.187 flex cables and 2 of your wire drives lol....my drivetrain will be bomb proof ...haven't had one driveline issue yet...(knock in wood) lol

[mrproc1]

Let me know if you decide to sell your current motor....

[dag-nabit]

X2 on Jeff's comment, it was the first thing I thought of when I started reading your post. But sounds like you have it covered.

I run Leopard 4082 1600kv motors in one Spartan and in my Fightercat Cat, it has proven to be a strong reliable motor and I have turned props as large as X642 without problem on a T180 ESC.

The 4092 is going to give you more power to turn larger props, but, keep in mind the larger motor will draw more amps, as will higher KV ratings, as will larger props. Your ESC will handle the AMPS, but as you have suggested, what about the batteries and wiring.

Look at the Leopard Hobby website and check the info on the motors. The 4092 1730kv motor is 4200W, max AMPS 140, and Max Volts 23. On 6S you are pushing that motor to the max on volts. The 4082 1600 is 3500W, Max AMPS 120, and Max volts 33, well within the comfort zone for all components on a 6S setup. http://www.leopardhobby.com/enindex.asp

For overall reliability I would suggest staying with the 4082 1600 and running a larger prop for speed. The downside is larger props create more prop torque to deal with.

For all out speed, look to the 4082 2000kv running a bit smaller prop. But again this motor is only rated 25V max voltage so you are maxing out again.

Also keep in mind the plastic hull, it has limitations on how fast you can push it before it shakes apart.

Kevin

PS Note the wind type on the motor you choose (Y or D) D wind motors require you run at low timing advance.

[Rcforever27]

thanks dag! very good info it helps alot...yea i was on the ose site lookimg at the differences between the motors.... so id like to stay in the sweetspot and try a 1800kv 4082 motor....does tht have a higher voltage rating? if not maybe ill stick with the 16oo kv... but im not a fan of huge props ...as it is difficult to get rid of torque roll.lol thanks again ! nice ti see u guys on here again...i kno ive been off the forums for awhile lol....

[dag-nabit]

They don't list an1800 on the leopard website. The 2000 is 25v the 1600 is 33v so I'm guessing the 1800 would be 25v minimum.

If the 1800 you are looking at is here on OSE, ask Steven if he has the specs for voltage amps and wind type. He often gets special wound motors done up and may have the info you need.

Kevin

[Brushless55]

hey guys ! its been awhile since ive been on the forums, but i have a new designedspartan hull tht i built from a bare hull.... ok so i have a jeff wohlt .150 flex cable, a castle hydra ice 240 esc, and my last run was with a octura x440 prop.... and im, running traxxas 8400 mah 25c lipos 11.1 volts in series . also i have currently a 4074 leopard 1800 kv motor my best speed with the x440 prop was 47 mph..... i know i have some trimming to do ..... but i was poking around on this forum and the traxxas forum and saw a couple guys running a leopard 4082 and a 4092 motor.... the 4092 was a 1800 kv...and the 4082 was a 1600 kv.... which do you guys recommend for more speed? im only worried abt my batt temps at this point.... but i needddd more speeeddddd lol....i did try a prather 215 prop and only hit a max of 45 mph..... thanks for any info guys!and im glad to be back on here!!!!

I say try a different prop like a X442 and see what happens... or a X440/3
the 4092 is a killer motor
I race one in my DF33 on 4s and run low 50's!

X2 on Jeff's comment, it was the first thing I thought of when I started reading your post. But sounds like you have it covered.

I run Leopard 4082 1600kv motors in one Spartan and in my Fightercat Cat, it has proven to be a strong reliable motor and I have turned props as large as X642 without problem on a T180 ESC.

The 4092 is going to give you more power to turn larger props, but, keep in mind the larger motor will draw more amps, as will higher KV ratings, as will larger props. Your ESC will handle the AMPS, but as you have suggested, what about the batteries and wiring.

Look at the Leopard Hobby website and check the info on the motors. The 4092 1730kv motor is 4200W, max AMPS 140, and Max Volts 23. On 6S you are pushing that motor to the max on volts. The 4082 1600 is 3500W, Max AMPS 120, and Max volts 33, well within the comfort zone for all components on a 6S setup. http://www.leopardhobby.com/enindex.asp

For overall reliability I would suggest staying with the 4082 1600 and running a larger prop for speed. The downside is larger props create more prop torque to deal with.

For all out speed, look to the 4082 2000kv running a bit smaller prop. But again this motor is only rated 25V max voltage so you are maxing out again.

Also keep in mind the plastic hull, it has limitations on how fast you can push it before it shakes apart.

Kevin

PS Note the wind type on the motor you choose (Y or D) D wind motors require you run at low timing advance.

few thing here...
bigger does not always mean you will pull more amps.. the Leopard can actually run cooler and more efficiently
same with NEU motors..

not sure why some get hung up on specs?
real world can be so different.. fact being Steven has put together a Cat with this 4092 motor on 6s and it was fast as hell, and ran with no issues on 6s

overal reliability = bigger motor to handle the load as the motor works less

all out speed go with a NEU or the Leopard 4092 1730kv
my DF33 with a 4092 2080kv outruns my friends Insane 34 mono with a 4082 2200kv on the same prop, and my boat is about 1 1/2lbs heavier

IMO

[Rcforever27]

Just put in my 4082 1600 kv motor in ....I have a Prather220 to try and I also have,a octura x 445 is the x 445 too much prop?@ hog or sjs, one of you tried a x447 prop ? So I should be good with an x445? Sorry I can't remember which one of you it was lol...thanks in advance for any info !p.s.,I also purchased a 4082 2000 kv motor as well lol

[de-pro]

I've had a 4082 1550kv running on 6s in my 32" rivercat since early spring. have had props as big as an m645 on it with no problem. The highest temp so far has been 125. This is a killer of motor with massive torque. I love to try a 4092 in a bigger cat.
I also have a 4074 1400kv installed in the impulse. Certainly not as much power as a 4082 but can spin an x447 with no problem. Temps always at around 100 or less utilizing dual water pickup for the motor and esc.

[dag-nabit]

Your setup will spin either the X445 or X447, but personally I think the 447 is getting a bit on the big side for the Spartan.

Torque roll is already prominent on the Spartan, and larger props will make it worse. All you can do is try them, check your temps a few times a run for the first few runs, and go with what you find is giving you the results you want.

I've run so many different props on different setups and boats I can't remember for certain what all I've ran on the Spartan with the 4082 1600. We are currently running a 220 and have been for awhile. I think the other large prop I ran was an X642, maybe an X645 at some point.

Kevin

[Brushless55]

Your setup will spin either the X445 or X447, but personally I think the 447 is getting a bit on the big side for the Spartan.
Kevin

not if setup right..
I love my X447/3 on my DF33 leopard 4092 on 4s!

[Klanderman]

Hello everybody!!! Im new in the brushless boat ind just bought a traxxas spartan and have been running it on TP 7.4 5000 lipos, the boat is awesome!!! However I've seen the pros and cons and would like to know if anybody can give me the perfect set up...
speed control, brushless motor, prop, cable etc, etc... I live in Guatemala Central America, so it's really hard to find anything as we only have like 2 hobby shops that carry nothing... please advice and thanks!!!

[Kramerr]

Running the 4082 2000KV motor might pull too much current than the 5.5mm bullet connectors can handle.