Talk 1520 - your experiences - RC-Monster Forums

ANGRY-ALIEN · **Talk 1520 - your experiences -** 03.21.2010, 06:11 PM

Hi guys, as the title said, 'Talk 1520'... I wanted to start this thread with the intention of having all you CC 1520 owners converse about your experiences with it...
I wanted us to look at vehicle type (brand, make, and model), weight, cell count, gearing, ESCs (torque settings), Temps and of course application (bash or race).
Photographs and Videos of your setups will be nice...

I got mine matched up with a Quark 125B (torque is set to 'Normal 1') in my Maxx... I must say, this motor is awesome on power... the first test I did with it was on
16 NIMHs (18.5v) and trucked weighed about 12 pounds ready to run... I had it geared at 15/51 with an OFNA CD... I was not disappointed... It was the first time
I saw the truck pull the front wheels off the ground on NIHMS with the CD setup...The motor pulled the truck hard to the top of the RPMs with little effort...
it was quite a difference to my previouse motor of the same KV (hacker c50 XL).

With the amount torque the motor demonstrated, I wanted to see what kind of power I could get if I increased the gearing a little... So, I went with a 18/51 setup and 5s...
It weighed a little less than it did with NIMHs... I was surprised to see how violent this motor was even with the increased load... It could still put out lots of torque with
no worries... My Bowties did not last for more than two sets of Batteries... The temperatures were great (I think), they stayed within the 120s and rarely peaked at 130.

Here are some numbers:

15 tooth pinion
Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 51
Pinion Tooth Count: 15
Total Voltage: 22
Motor KV: 1600
Tire Diameter (inches): 5.65
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 3.4 : 1
Total Ratio: 14.62 : 1
Tire Circumference (inches): 17.75 inches (450.85 mm)
Rollout: 1.21:1
Total Motor Speed: 35200 RPM
Vehicle Speed: 40.47 mph (65.01 km/h)
Effective KV Value: 1600
KT constant: 0.85 oz-in/A

18 tooth pinion:
Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 51
Pinion Tooth Count: 18
Total Voltage: 22
Motor KV: 1600
Tire Diameter (inches): 5.65
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.83 : 1
Total Ratio: 12.18333 : 1
Tire Circumference (inches): 17.75 inches (450.85 mm)
Rollout: 1.46:1
Total Motor Speed: 35200 RPM
Vehicle Speed: 48.56 mph (78.01 km/h)
Effective KV Value: 1600
KT constant: 0.85 oz-in/A

feigao 8xl, hacker C50 10xl (dead) and the CC 1520

Alien

magman · 08:21 PM

My 1520 is in my mbx5T on 5s geared 17 / 48. Runs cool as can be as I bash only.

Truck weight RTR is 11.5 lbs.

Setup:
mmm esc settings:

low start power
3.3 lvc
60% punch control ( may move i up to 70% )
60% brakes
no drag brake

diffs:

front 20WT.
center 20wt.
rear 7wt

With this diff set up there is almost no ballooning running Badland tires on Rulux 1/2" offset rims

5s turnigy 35c 5000mah li-po

nitrostarter · 03.21.2010, 09:48 PM

Have you guys noticed increased runtimes with the same MAH packs due to increased efficiency.

ANGRY-ALIEN · 03.21.2010, 11:19 PM

Hmmmm... My run times did increase, but not by a whole lot (never really timed it officially).

Alien

magman · 03.22.2010, 08:02 AM

I am not sure really...most of the time I rarely get to run a full pack. As the weather breaks, I will try to be attentive to run times.

I love the shear torque of the motor. Puts a big one of these

on my face anytime I run..

JThiessen · 03.22.2010, 11:12 AM

My 1520 is in my Muggy
Slipperential in the middle, 50K, and slipper tight.
5S Neu pack, MMM (dont know what settings I have it on right now)
50/18 gearing

I have only run it up and down the street a couple time so far, but its got plenty of power. Does NOT lift the front wheels off the ground, little slip on take off (dry pavement). But it does seem to run real cool so far.

nuz69 · 05:30 AM

Be reading this, it just confirm what I though about this torque monster ^^ I just can't wait to have mine !!! Here is the setup I will probably run in my MBX5T :
Differential Ratio: 4.6
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 15
Total Voltage: 22.2
Motor KV: 1600
Tire Diameter (inches): 5.65
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 3.07 : 1
Total Ratio: 14.10667 : 1
Tire Circumference (inches): 17.75 inches (450.85 mm)
Rollout: 1.26:1
Total Motor Speed: 35520 RPM
Vehicle Speed: 42.32 mph (67.99 km/h)
Effective KV Value: 1600
KT constant: 0.85 oz-in/A
What about your motor timing guys ? I will probably put mine at 6 or 7 to maximize efficiency...
But it's out of stock!!!!!!!! :( :( :( :( :( :( :( Hope Mike will restock soon.
In fact i am still hesitating between this one and the 1717... but I am not sure if the RCM motor mount can handle a motor this big :(
Magman, do you have some space between chassis and your motor with RCM motor mount, or it is already too tigh with the 1520 ? The 1717 is larger..

magman · 03.24.2010, 10:09 AM

Quote:

Originally Posted by nuz69

Be reading this, it just confirm what I though about this torque monster ^^ I just can't wait to have mine !!! Here is the setup I will probably run in my MBX5T :
Differential Ratio: 4.6
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 15
Total Voltage: 22.2
Motor KV: 1600
Tire Diameter (inches): 5.65
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 3.07 : 1
Total Ratio: 14.10667 : 1
Tire Circumference (inches): 17.75 inches (450.85 mm)
Rollout: 1.26:1
Total Motor Speed: 35520 RPM
Vehicle Speed: 42.32 mph (67.99 km/h)
Effective KV Value: 1600
KT constant: 0.85 oz-in/A
What about your motor timing guys ? I will probably put mine at 6 or 7 to maximize efficiency...
But it's out of stock!!!!!!!! :( :( :( :( :( :( :( Hope Mike will restock soon.
In fact i am still hesitating between this one and the 1717... but I am not sure if the RCM motor mount can handle a motor this big :(
Magman, do you have some space between chassis and your motor with RCM motor mount, or it is already too tigh with the 1520 ? The 1717 is larger..

1. I did put small washers between center diff mounts and chassis to raise everything up a bit for more clearance

2. I have the motor timing to 0

3. IMO the 1717 is too big for a truggy, heck the 1520 is a bit on the large size, but, I wanted a motor that I would not have to worry about. I was running a 1515 ccneu before and that was just fine as well

nuz69 · 03.24.2010, 10:15 AM

OK thx.
I always heard that for à 4 poles, the best timing is between 5 and 10 ??? 0 is for a 2 poles motor no ?
A 1717 will be too much then ^^

magman · 03.24.2010, 10:22 AM

Quote:

Originally Posted by nuz69

OK thx.
I always heard that for à 4 poles, the best timing is between 5 and 10 ??? 0 is for a 2 poles motor no ?
A 1717 will be too much then ^^

IMO the 1717 is too much. For all my ccneu motors, I leave timing at 0 and have had no issues and I gear up if more speed is needed. Basically the higher the timing, the less efficient. Anyway, raising timing too much will decrease efficiency without any gain in power, so that means more heat.

SunnyHouTX · 03.24.2010, 10:32 AM

I have to side with nuz69 in this one magman. I've read posts, some by CC personnel, that 4-pole motors should have higher timing. 2-pole motors definitely should have 0 timing whenever possible (I run some timing in my drag set ups but that's another story because heat is not an issue there). I run my Medusa 36-70-2000 at 8 - 10 degrees and my CC/Neu 2200 at 10 degrees and that has given me best results for temps and run times.

nitrostarter · 03.24.2010, 10:37 AM

Keep in mind, the present day 1717's are equipped with 6mm shafts. CC is in the process of changing them to 5mm at the moment.

nuz69 · 03.24.2010, 10:41 AM

This timing issue disturb me, I have made a new thread about it, hope that some Castle Personnel will answer...

SunnyHouTX · 03.24.2010, 10:43 AM

Nothing to be disturbed about. You got it right the first time.

ANGRY-ALIEN · 03.24.2010, 10:43 AM

Quote:

Originally Posted by JThiessen

My 1520 is in my Muggy
Slipperential in the middle, 50K, and slipper tight.
5S Neu pack, MMM (dont know what settings I have it on right now)
50/18 gearing

I have only run it up and down the street a couple time so far, but its got plenty of power. Does NOT lift the front wheels off the ground, little slip on take off (dry pavement). But it does seem to run real cool so far.

Quote:

Originally Posted by magman

1. I did put small washers between center diff mounts and chassis to raise everything up a bit for more clearance

2. I have the motor timing to 0

3. IMO the 1717 is too big for a truggy, heck the 1520 is a bit on the large size, but, I wanted a motor that I would not have to worry about. I was running a 1515 ccneu before and that was just fine as well

Hey guys... can you post photos of your 1520 setups... it will help to illustrate a 'clearer' picture on how you have modded your trucks facilitate this monster....

Oh yah + 1 on the 0 degree timing...