Talk 1520 - your experiences
 

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


http://lh3.ggpht.com/_4vPm5E8J5HA/Sz...0/DSC_1615.jpg

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

http://lh6.ggpht.com/_4vPm5E8J5HA/Sz...0/DSC_1613.jpg



http://lh6.ggpht.com/_4vPm5E8J5HA/Sz...0/DSC_1612.jpg



http://lh4.ggpht.com/_4vPm5E8J5HA/S0...0/DSC_1797.jpg



Alien

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

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

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

Alien

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:mdr: on my face anytime I run..:yipi:

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.

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

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.

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.

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.

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

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

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...

good point..i did run my Medusa at 10 deg. Well I may have to up my timing on my 1520 and see what happens. Although, at 0 timing, I have had no issues w/temps

Here's a couple pics. No mod's required really. (please excuse the doggie bags in the background....:intello:)

http://www.rc-monster.com/forum/pict...&pictureid=630

http://www.rc-monster.com/forum/pict...&pictureid=626

I've got a build thread in the General section for this and my LST.....woulda put them in a better place.....but it appears that this site hates Losi....:gasp:

Nice build... when can we see it in motion?

If you have a laptop, pick it up and turn real fast to the right!!!!

I dont have anything that shoots video well enough to pick up the speed on these - just something we never invested it. Maybe in a month or so I'll see if my brother in law can do some taping - he's got one of those 5K professional video cams. Only issue with him is that it always takes a year for him to get the vids back to me. By then, that RC is usually long gone!!!!

Yah!! :lol:... I know the feeling... been wanting to get some new vids of mine too... but it's really hard to depend on someone to do it for you when they're going to take forever to hand over the vid.

Site has good taste.:lol:

My 1520 is ordered ;) Just finished to adjust shimming of my MBX5T's diffs. The chassis is ready to eat the torque of the Castle beast ;)

I suppose TRX is the best ?

:rofl::rofl::rofl::rofl::rofl::rofl::rofl:

No, Project X is the best.

V1 MMM Pushing 6s to a 1520 on 15/54 in a RC8T.
http://i300.photobucket.com/albums/n...d/DSC08004.jpg

I had my 1520 up to 130*F after a hard 15 min of off-road & street runs. Here some videos of the run.

Off-road, sorry for the shaking, I had my camera mounted on top of my TX and was walking into position.
http://i300.photobucket.com/albums/n...h_MOV08023.jpg

On-road
http://i300.photobucket.com/albums/n...h_MOV08029.jpg

:surprised:.. nice!... that thing moves around well... what timing/punch setup are you using? do you know its weight?

Looks like a whole lot of fun man... thanks for sharing :yes:

Thanks, I went and pulled the settings. 0% punch, 60% brake, 13 for timing. It weighed in around 12lb RTR and 120k CD fluid. 13 for timing sounds a little on the hot side, I dropped it down to 9 to try next time.

Sweet! Clearly those (savage) tires are taped, right? Otherwise...

According Castle, best efficiency is reached when timing is between 2-4.

This is a 4-pole, right? Could you even feel the difference versus a 1521?

Kcaz25,
I am pretty sure they are not taped, I got them used pre-mounted. I do have some rubber bands on the outside I guess that might help a little. I plan on doing a fishing line wrap soon to them.

Thanks Nuz69,
I can drop the timing to 4 and re-try.

I would have thought with that much power the tires would have exploded without taping. IDK. Nice rubber bands! lol

Nice... can you make comparisons with temps on different timing setups? Oh.. and also run times...

How's the 1520 compare to say the Tekins TT2362 (1700kv truggy motor)?

I also like the specs on the 1518 for my mbx6t racer. Might be an option as well.

As my opinion 1520 handle much more power than the tekin truggy. Tekin truggy handle as much power as a classic CC/neu 2200kV or less (1400-1500W).
The 1518 and 1520 are longer, by 3 rules calc method it would have maybe 1800 and 2000W

Interesting....

I guess my only concern is over-powering the truggy. I'm sure for bashing with a maxx or something more substantial it would be great fun. Anyone running one of these in a race setup? How's the power/application?

The benefit to the powerhouse could be increase efficiency and less heat pulling similar gearing.

That's it, the motor pull out its power only if you ask it, and the efficient is better if you dont push it to its max output. Therefore a 1520 in a MAXX wouldnt be incontrolable, unless you gear it for 80 mph ;)
Too much power is always better than not enough.

lol!

I guess that's the question then, what is "enough" power. By the too much power is always better rule, the 1717 would be a better option still, no (other than it's huge)?

I'm just looking to setup my mbx6t for racing. Being the 2200kv neu/CC setup has worked well in racing setups, makes me think 1400watts is enough for a 9.5lb truck.

Just trying to understand here. I've been a nitro guy forever so trying to get my head wrapped around all of this . ;)

Where the 2200kV is well, the 1520 1Y 1600kV is always better , because its would run for example 40-50 °F lower than the 1515 1Y for only additionnal 50gramms. The 1717 has same kV than the 1520, but is bigger and weights 150 more than the 1515 1Y ===> it requires relatively many AMPs and is a little heavy for a 1/10 monster truck.
2200kV works well but go easily hot in a monster truck when you push it in summer and its better to run cold for efficiency and longer runtimes.