Neu 1512 vs. 1515
 

Hey guys,

I think it's time to move up to a real motor. I just can't keep the Feigao cool in race situations. I've done everything from adding fans to even making a heatsink sleeve that covered the entire motor. No matter what I do, the Feigao overheats. I've been able to delay it a bit, but it's going to happen sooner or later.

Anyway, I have my sights on two motors. The first is the 1515 2.5d and the other is the 1512 1.5Y. I am more than satisfied with the performance of the Feigao 9XL. The only problem is the heat. I want to put this motor into my 8ight T truck. I've asked Mike what he thought, and he said he'd go for the 1515, but then there were a couple who said that they are running a 1512 in 13lb trucks, without issues.

Will the 1512, equal the performance of the Feigao? Will it run hot in my truck. I really want to get the 1512 because I think it will be snappier, as the L motors are compared to the XL motors, and the 1512 will give better runtime. Do I really need the 1515 motor?

I'd appreciate comments from those running the 1512 in their 1/8 scale trucks.

Thanks.

Being a more efficient motor, the 1512 will easily surpass the XL Feigao. Believe me, the 1512 is PLENTY for my buggy even though it is geared quite a bit taller than necessary - I find myself setting the EPA to about 60-70% just to keep it controllable and the speed down. However, if you are running a truggy, you might benefit from the extra torque. And since Mike recommends the 1515, I'd go with that.

Brian, I suppose that the root of my questions is that I'd like to know if the 1512 will equal the power of the XL motors. I'm not interested in surpassing it. I don't need any more torque. I've just gotten my truggy setup so that it won't wheelie on the track.

If a 1512, will at least equal the performance of the XL motors, then it's a no brainer for me. My truggy only weights 9lbs, without the battery. With the 9XL, and after 30 minutes of running, my 4S 8Ah pack only took back just under 6A. If it get the current sipping 1512, then I can run a 6Ah pack for less weight and still make the 30 minute mains.

Bottomline, what I just want to make sure of is that the 1512 is at least equal to an XL motor and won't overheat with extended running. Besides, the 1515 is only .3" longer than the 1512. Is there really that much of a difference? The 1515 is relatively a lot heavier.

I actally prefer the 1512 to the 1515. I had a 1515/2.5D and traded it to get another 1512/2.5D. The 1512 is MORE than enough power for any truck except for maybee the absolute heaviest. Even at 13 lbs you will still be turning your epa down.

Compared to a xl motor it will run tons cooler and have just as much power, probably more.

IMO would 1512 will make you very happy, especially if you like a snappy feel like me.

Yeah, if your question is simply "Does the 1512 have as much torque as an XL", then the answer is a resounding YES. :)

I do like that snappy feel. I have found it kind of strange, in that I've been running the XL motors because they don't get as hot as quickly as the L can motors; but I recently put the 8L back into my buggy, just to see. After having had a bunch of runtime with the XL motors, I did notice more of a snap to the L can motor. If the XL is instant power, then the L can was instant, instant power.

I figure that my truggy will go 13lbs., at its heaviest; that's with the big 40 series Moab tires and a 5S2P 8Ah pack. In race form, it shouldn't exceed 11lbs. It's really starting to look like it's going to be the 1512 1.5Y for me. I don't see much difference between the 1.5Y and the 2.5d in terms of rpm/v; however, I believe that the 1.5Y is more efficient and I'll take all that I can get.

Does the 2.5d have more torque than the 1.5Y? I'd like to get the 1.5Y as it has good numbers that indicate good performance on 4S, but a kv low enough for 5S when I feel so inclined.

Brian, there you go!!! An unqualified answer. That's what I like.

Now, the only thing that's killing me is the 1512 2Y on ebay right now. That price is almost too low to pass up, but that will likely be too slow on 4S.

I run the 1512/2.5D on 5s all day long. Motor heat is no issue. I run one in my buggy and one in my revo. In the buggy I acutally run a 3s pack on the track is its set up tight. On a big track 4s is great and for bashing 5s is just retarded.

Th revo runs great on 5s bashing and 4s track.

Oh, thank goodness. The 2Y on ebay has been sold, but I did pick up a spare chassis for $50.

I figure that my 8ight weighs as much as a Revo, the 1512 should do fine.

i'll throw my input out there.. I have jhautz 1515, and he's got my old 1512. I simply couldn't gear my truck to keep the 1512 temps down. I believe I was around 16/46 on my LSP, and without a fan on the 1512, the motor got too hot to touch in under 5 minutes, on a 90 degree day. I've got the 1515 now, and also using the same gearing.. the motor was barely warm without a fan in the same conditions after 10 minutes, and with a fan on the motor, I couldn't feel any heat at all. I lost about 10 mph, but can easily gear the 1515 back to the ~40-45mph I was at with the 1512, but won't have any heat problems at all. My Quark runs alot cooler as well. before you couldn't hold it, now I barely feel any heat.
depending on how you can gear your truck, I think the 1512 2.5d is too hot on 5s, but would probably run excelent on 4s. a slightly lower kv 1512 would probably run great on 5s as well.

A4DTM, are you saying that the 1512 got too hot because it wasn't enough motor? Perhaps 16/46 on a 2000kv motor was a bit too high gearing. Did you try gearing to perhaps 12/46 or 14/46?

I'm running my 9XL geared at 16/46 and that's pretty much in line for the 1515 2.5d as well, since they are similarly rated, kv wise. I'm thinking that if the motor and esc were running hot, it might have been a gearing problem.

Perhaps I should go for the 1512 3D. After having run the 7XL both on 4S on the track and on 5S for clowning around, I think that I really like a motor with that kv rating.

At this point, I'd kind of like to run larger pinions, 14T on up. I don't know if there is any validity to it, but when I was running my HEAVY Muggy, there were occasions when I was running a 9T pinion with a 46T spur gear and I stripped the spur gear when landing after a jump with the brakes applied. This only happened on surfaces where the tires were really hooking up, but I think that the larger pinions get you more gear contact and might prevent this. It might not be a big deal to most, but when I'm bashing, I run 40 series all terrain tires and that's a lot of rolling mass to try to stop.

AAngel, that was exactly the problem. on my lsp, with mike's motor mount, a 16t pinion is the smallest that will work with a 44t diff gear i was using. I replaced the 44t with a 46t, because the 44t just barely reached, and got stripped. 14/46 might have worked, but wouldn't run nearly as cool as the 1515 2.5d is now.

I have a 46T center diff and Truggy f/r diffs in my revo so gearing wise its the same as your lsp and on 5s I run 15/46 gearing on the 1512/2.5D with no issues. If I'm running in grass or want to gear down I usually go down to 14T and on pavement I run up to 16T or even 18T for speed runs. 14T-16T seems to be the sweet spot for the 1512 in my setup. I never have an issue with motor heat. If anything I have ESC heat issues before motor heat issues.

I think bottom line is you will be happy with either choice. They are both far superior motors to the XL you are used too. Its kinda hard to go wrong here. Just a matter of preference.

A4, they problem that you had with the gearing is something that I won't have to worry about. My mount lets me use a 9T pinion with a 44T spur. If I go with the 1512 1.5y, I'm thinking along the lines of 12-14/46 gearing. If I go with the 3D, I'm thinking 14-16/46 for the gearing. I really like the 1700kv motor. It does all that I want. If the 1512 3d will perform the same as the Feigao 9XL, but run lots cooler, I'll be a happy camper. The 9XL already has the potential for more torque than I can use. If the 1515 puts out more torque, I don't need it.

Confucius say "Tis better to have it and not need it, than to need it and not have it". :)

Ok, Ok, I get it. I suppose that the 1515 won't draw much more current than the 1512, if I'm not pushing it. I'm just trying as hard as I can to get the right motor the first time. I have so much wasted money into this brushless conversion stuff that I don't want to make any more mistakes.

In fact, I'm not getting the Neu until I can sell my buggy. I just can't keep throwing money at this stuff. My wallet is starting to hurt.

Join the "wounded wallet" club...

Seriously, I still think you'll be more than happy with the 1512 if you want something better than or equal to a 9XL. I just don't want to be the one that makes you decide to get a 1512 just to find out it wasn't as good as you wanted after all. The 1515 will be even stronger than the 1512, but that doesn't mean you have to use it all - just be gentler on the throttle. :)

Couldn't have said it better. :027:

But for the sake of argument, can someone re-cap for me as I may have missed it: For same truck the 1515 will provied more torque/power, but what is the major advantage of the 1512? :032:

I went from running a 9xl on 5s in my LSP (geared 15/46) to running a 1515 1y (2200kv) on 4s (geared 12-14/46). The power was great from the 9xl, I just felt the need to upgrade to a better motor. (plus the front endball fell off, it was the 540c version) The best way I can explain the difference is like: "Wow, the 9xl on 5s has great power!:018: " to "There's more power?!?!? How!?!?!:confused::032: " You think it's going to lose torque once you get near top speed, but no! It just keeps pulling, like: "Go!Go!Go!Go!Go!Go!Go!Go!Go!Go!Go!Go!!!!!!!!!!!!!! !!!!!:mad:1 :mad:1 "

Here is my thread where I decided between the 1515 and 1512 http://www.rc-monster.com/forum/showthread.php?t=5558

Hope this helps!

Bye:018:

Runtime and weight.:017:

+1 vote for the 1515 since it's more versatile than the 1512. Better for all-around use (racing, bashing, etc.) in my opinion.....

However...

If you keep it at race weight I'd vote for thje 1512 with it's "snappier" response. lower weight, and lower power consumption.

cem, thanks for the link.

Pro, I do intend the race the truck, but I do usually run 40 series Moabs when bashing. I might be better off with the 1515 after all. Now I just have to find a 2.5d.

I think you'll be happy with the 1515 AAngel! Let us know how it's running when you get it installed!

:005: Wounded?.....

I wish!

I anhilliated mine :005:

AAngel, try www.flydma.com for the Neu motors. I use them a lot for my other RC money wasters, planes and helis.

rc-monster.com is my personal favourite to get the Neu motors from.

Wounded Wallet.. Sounds like a nasty female impurity....

I like RC-Monster also, but he is out of stock.

Geez, I'm kinda tight on cash for the next month or so. Working on the house takes priority (as far as my wife is concerned), so I have to choose between the Neu or a CRT .5. I'm having a hard time making a decision.

I say go with the NEU and finish that project. Just my .02!

Well, I went with the Neu. Since Mike's been out of stock on most of the Neus, I went shopping around, and I found a deal on a 1512 1.5Y that I couldn't pass up. I hope it works out.

I just weighed my truck with a the 9XL and heatsink and a 4S2P 8Ah pack and it came in at 10lbs. 6oz. Getting rid of the 9XL and associated heatsink and perhaps being able to go to a 6Ah pack, I should be able to bring the total weight down below 10lbs.

So...does anyone know what a good 35mph gearing would be for my 8ight T with the 1512 1.5Y?

I'll be interested to hear how that runs with the MM!

Believe me, so am I. Since I smoked my Quark yesterday, and my Compro hasn't come back from the Czech Rep. yet, all I have is the MMs to run it with. I'm hoping that the wire upgrades and the cap mod will help it out some.

You can use Brian's calculator. I plugged in some numbers but you'll have to confirm the diff ratio and spur tooth count. I came up with 15t/46t on 4S for 35mph.
http://members.cox.net/gluena/buggyspeed.JPG

riceman, good try, but a few values are off. Surprisingly you still came up with pretty much the same thing I did.

Guys, you do realize you can use the "Export Values" button don't you? It's not as pretty once you paste the results into your post, but sure is a lot easier than taking screenshots...

Thanks guys, 14/46 puts me right were I want to be on pinion size. I don't like running those ultra big or small pinions. Even still, I'd imagine that going 18/46 should put me right at stupid for clowning around; or maybe 16/46 on 5S lipo.

I just got the email letting me know that my motor has shipped. I suppose that I should have it by Wednesday or Thursday. That'll give me a day to see if I can get it race worthy for the weekend.

I'm kind of excited about this.

AAngel: Where did you get this Neu motor?

OK, I got the 1512 in the truck and took it out and ran it. What can I say? I should have listened. When will I learn? Either I got a bad motor or the 1512 1.5Y just isn't enough motor. The performance of the 9XL far exceeds that of the 1512 1.5Y. The XL has lots more torque. Maybe the 9XL that I got is just a stellar performer.

Really? I would have though they would be equal performance-wise.

What voltage were you running them?

4S lipo. I was using Kokam packs so it wasn't the batteries.