Talk 1520 - your experiences - Page 13 - RC-Monster Forums

cham · 01.23.2011, 12:51 PM

I am running a 1520 on 6s in my muggy, currently Im running 20mm hexes with losi super bolt on tires. I keep hearing that on a low KV motor I should be running a higher tooth pinion. I am running 14t pinion on a 48t spur. Should I bump up the pinion a tooth or two? I dont want to overdraw current form the batteries and make things hot. But I also dont want to put too much load on the batteries and burn up the esc. Batteries are turnigy 4000mah 6s 30-40c rating (no worries I have some 35c batteries on the way)

ANGRY-ALIEN · 02.15.2011, 12:46 AM

Quote:

Originally Posted by cham

I am running a 1520 on 6s in my muggy, currently Im running 20mm hexes with losi super bolt on tires. I keep hearing that on a low KV motor I should be running a higher tooth pinion. I am running 14t pinion on a 48t spur. Should I bump up the pinion a tooth or two? I dont want to overdraw current form the batteries and make things hot. But I also dont want to put too much load on the batteries and burn up the esc. Batteries are turnigy 4000mah 6s 30-40c rating (no worries I have some 35c batteries on the way)

Gear for the intended use of the truck... and check the temps to be sure you are with operating limits...

Ok... some sort of update... earlier tonight I decided to mount a 20t pinion on the 1520 to see how well this thing would do with the additional load...
Well, to be honest... i was not surprised to see the 1520 handle its business with no effort... It was so quick going down the street.... I had a hard time
holding in the smiles when I blasted up and the parking lot... Rolling wheelies are even easier now since the wheels spin up so quickly... Needless to say,
i am still having a lot of fun with this truck..

This motor is AWESOME!!!!!!... I am still running it on 5s...

Here are the numbers:

Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 52
Pinion Tooth Count: 20
Total Voltage: 18.5
Motor KV: 1600
Tire Diameter (inches): 5.65
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.6 : 1
Total Ratio: 11.18 : 1
Tire Circumference (inches): 17.75 inches (450.85 mm)
Rollout: 1.59:1
Total Motor Speed: 29600 RPM
Vehicle Speed: 44.5 mph (71.49 km/h) (21v-50.52 mph (81.15 km/h)
Effective KV Value: 1600

Alien

lincpimp · 02.15.2011, 01:06 AM

Just wait till you put 6s on it. The term potent comes to mind!!!

I have 3 of these motors, and 3 of the 1717 motors. Not sure what to do with them, but it will be fun!

ANGRY-ALIEN · 02.15.2011, 01:20 AM

Quote:

Originally Posted by lincpimp

Just wait till you put 6s on it. The term potent comes to mind!!!

I have 3 of these motors, and 3 of the 1717 motors. Not sure what to do with them, but it will be fun!

Hey Linc, I try 6s soon enough, but I'm sure I won't need it... this thing is loads of fun on 5s already... but I'll give it a go..

02.15.2011, 11:44 AM

I have the 1520 in my RC8T FT running on 5S with 15/52 gearing. It isn't all that fast but it's all that my local track can handle. Heat? What heat? Everything is almost ambient. I don't even run a fan on my MMM since I broke the last one. Great motor.

Also tried it with 20/52 on 6S and it was just insane (This time I used a MMM that had a fan) and it was just great. Wheelies and front tires ballooning like crazy. No real heat on the 1520 to speak of. Say about 100-110F maybe but the ESC was a little warmer than I like to see it.

All in all this has to the best $65 that I have ever spent.

ANGRY-ALIEN · 02.15.2011, 11:58 AM

Yeah... the motor seemes to like the higher load setups as the temps were quite good through the run... If I get the chance... i'll do some temp checks and post up the numbers tonight...
not sure how long the tyres will last with the punishment they are receiving though

...

Alien

Kcaz25 · 02.15.2011, 01:13 AM

Good to hear!

Jahay · 02.15.2011, 12:15 PM

this motor is awesome!
ill chuck in my info...

i have been running my xxl savage ONLY on 6s with my centre diff running 14/47 geared for 53mph...
My ESC -122
Motor - 140

Not bad for a 16-17lbs TRUCK!!!!! there is definitely wiggle room... I usually just keep my trigger finger pinned when running
On this run, motor temp didnt go above 130 and esc was around 105 from what i remember
http://www.youtube.com/watch?v=Hew53NyAObo

ANGRY-ALIEN · 02.20.2011, 02:34 PM

Quote:

Originally Posted by Jahay

this motor is awesome!
ill chuck in my info...

i have been running my xxl savage ONLY on 6s with my centre diff running 14/47 geared for 53mph...
My ESC -122
Motor - 140

Not bad for a 16-17lbs TRUCK!!!!! there is definitely wiggle room... I usually just keep my trigger finger pinned when running
On this run, motor temp didnt go above 130 and esc was around 105 from what i remember
http://www.youtube.com/watch?v=Hew53NyAObo

Sweet!!

I got the truck out today... did some hard runs through grass and on asphalt for a bout 12 minutes before the wheel came off during braking... gosh, the power just goes on and on...

here are the numbers:
Asphalt - 114° F
Motor - 133° F
ESC - 119° F

Alien

George16 · 02.20.2011, 08:02 PM

I was able to run my Gmaxx a couple of days ago. Geared 44/21 on 6S with the 1520 motor was insane. It propelled the truck so effortlessly. The batteries and motor barely got warm.

ANGRY-ALIEN · 02.20.2011, 08:45 PM

Hey George, could you post your truck photos and vids here? love the work you've done on it man...

cham · 02.23.2011, 01:36 PM

Im running the 1520 in a muggy that is pushing 14 pounds fully loaded.
center diff:14/48
diffs: xxl diffs
batts: 6s 30/40c
tires: super bolt on tires on losi 420's
esc: mmm v3

Temps are very cool almost ambient. Fan never has come on the esc while running, even in grass with tons of long full throttle pulls, jumps, etc. I cant wait to try out some nano tech batts with an insane C rating to see what this bad boy can do. Its fast now, no doubt, but not at all fast enough ;) But in my own defense, I have the punch control turned down a little and I haven't messed with timing at all...

02.24.2011, 09:27 PM

I love this freakin motor. I took my RC8T out again yesterday on 6S through grass and dirt. Temps maybe 10-15C above ambient at the end of the first pack. Torque galore.

Few of my friends, after seeing how this motor runs in my car, want one for their truggies. Problem is that they aren't any longer available. Please bring them back Castle (I want a few spares too).

nuz69 · 03.09.2011, 10:06 AM

I have two 1520 new as spares, waiting in their boxes, but I don't need them, my first 1520 still works like a charm in my mbx5T truggy since one year of intense racing and bashing on 6S

.
I Still have the same bearings, love the durability of thoses NMB oversized bearing

Jahay · 03.11.2011, 07:13 AM

i am really going to put this 1520 to the test.
I have a brand new 1520 sitting here.. it is going to go in my 18lbs savage! Im going to run it on 9s! so near its max RPM Limit... and then we will see what this baby can really do :)

It will be pushing heavy baja rims too... So this will be a good test! Im going to gear for 70mph on 9s using an ice hv! Ill keep you posted!