1520 enough motor for 1/5-1/6 scale cen nemesis?
 

Greetings rc monster crew, I want to start by saying that I think this forum is fantastic and I'm very excited to be here. :0)

I'm building an XL cen gst/nemesis, It's about 26-27 inches long, wheelbase 19 ish, width 20-21, I'm adding 2 to 3.5 inches to length and width. It should weigh in about 15-18 lbs, a hog I know.
I have a mmm 2200kv combo that I was thinking about using, I've read about it being used and seen videos but I just don't think it will be trouble free on the heat front.
I then turned to looking at the 1717 but worry about mounting that up.

The 1520 seems like it might work, I'm assuming I'd need to run 5 or 6s with it so again I'm assuming that something along the lines of a mamba xl2 would also be in order if I want to be worry free.

Current final drive ratio is 16, i have tires ranging from 6.4 to 7.5 inches tall to run. Pinion is a 9t Novak, spur/cd is a 50t hot bodies ve8.
I know my pinion is going to wear quickly being so small so I'd like to kv down and gear up from where I sit now with my calculations; 2200kv, 4s lipo, top speed around 45mph. I've never driven this vehicke, it's not finished so all my planning based in the 2200kv is just on the speed calculator using inputs from what I currently have.

So, would the 1520 excell here, what esc and voltage would you all suggest which leads into what esc I would need and lastly based on all that what pinion to accompany my 50t spur cd and 2.89 diffs.

Truck is a basher, desired top speed would be 40 to 60 with gobs of torque.
Thanks in advance fOr any help given.

The 1520 might work for you - but you'd be pushing it depending on your final weight and gearing. If the truck ends up being 18lbs and you try to gear for 60mph I would guess it wouldn't work too well. A 1717 would be better. But if that won't fit, your best motor would be a 1527:

http://www.offshoreelectrics.com/pro...u-1527&cat=117

If you have a 1520, you could try it and watch your temps. But if you need to buy one for $200 or more on eBay - I would probably pay a bit more and go with the 1527. My experience with the 1527 is in my 19lb truck geared for 50mph - it worked great, but on a hot day would go up to 160F or so (without a fan).

Put it this way, I run a 1520 in a truggy and it is perfect...like above stated, too small IMO for anything much larger, especially weighing 15+lbs.

Thank you both. Do either of you happen to know the mounting pattern/screw hole dimensions Of the 1717. I'm sure I can make it work if need be, I might have to get a new motor mount but that's about it.
The 1527 is a higher rpm motor though correct? That would be a plus I'm sure.

The 1717 has the same mounting screw spacing as the 15 series - it just has a larger diameter, if that is an issue. And yes, the 1527 is a 60k rpm motor compared to 45k for the 1717.

1527
 

Go for the gusto man. Use the motor that will give you a little wiggle room regarding heat and power band like the Neu 1527, but consider that the can is a bit longer as well. Also use the CC-XL2 so you will have plenty of power control with the least amount of heat issues. I believe that setup will give you the best results, and the least amount of problematic issues. Good luck with your project and post up some pictures and specs as you go.

I have a heavy truck that I used 10S and also up to 60V on and it was a blast. I would suggest 10S or higher with a low Kv motor.

Good to know, so it's just 5mm or so larger. I really would like the extra rpm though of the 1527, It seems that the 1717 could almost hit max rpm's on 6s.
Ok, so who has a 1527 for sale???

Here ya go
 

I'd love to find one new/used for a discount. I appreciate the link though.

What esc did you use, ice160 or similar? Also, what mah were your batteries, 10s would most likely push my truck to over 20lbs with 5000mah batteries.
I think mechanical braking would be straight forward but I think I might miss reverse a little, I could live without it though I'm sure.

With 10S, you could use a pack(s) with less capacity. With 6S (22.2V) and 5000mAh would mean you have around 111w/h and you would only need 3000mAh with 10S to have the same energy.

I started with a little Jazz 10S, 40A Kontronik, but since it was a bit old, the capacitor blew. I later went with a Jazz 55A with 10S and it was a blast. Later runs was made with a Schulze 40.160 controller. Now I use my own controller and I mainly use my 10S ESC in my race truck with 8S 3300mAh-3700mAh and a Neu 1515/2Y. All my 8S and higher set ups stayed very cool. I now have a 1521/1Y that I run 5S (4500mAh) and 6S (5000mAh) lipos with, but that set up went on hold due to the higher voltage truck being so reliable.

I have a Neu 1527/1.5Y (825Kv) Smooth (New with connectors) that I was going to use when a new HV ESC I was planning on making, but ESC project got put on hold. If you're interested, send me an e-mail at brasuca2478@hotmail.com.

Go for a 1717. It seems to work great with the xbe.

Email sent.

I wonder how high I could gear running this big fella?? 5 or 6s and gear for 60-70mph?? ;0)

Lutach was kind enough to offer me his 1527 825kv to purchase which sounds evil and fantastic however now I'm faced with finding an HV Esc that is not too expensive and will not burst into flames. He suggested the Kontronik 120HV but damn is it expensive.
Does anyone want to offer me a smoking' deal on a Kontronik 120HV or have another suggestion?

Used
 

I picked up my used 1527 for $100 from James aka "Lincpimp", and if your lucky enough to find anyone willing to let go of a quality ESC you might find one for $100. IMHO though I would say your best bet would be to purchase a used 1527 from a known member with a good reputation (Lutach) and then find yourself a brand new ESC and at least have some level of warranty (CC XL2). Plus you can get one that has everything that is requred for handling your setup.

I have a few of the Kontronik Jazz 55A ESC and all of them were bought used. Kontronik ESCs are solid and I know that the Jazz 55A with a heat sink and maybe a fan can handle your set up (Ask Othelo (I think that's him) that used his Jazz 55A unit with a home made 5th scale), but the Jive is even better (http://rc.runryder.com/helicopter/t681727p1/) and would be a better option at the moment for your set up. If you're not going to use the ESC brakes or reverse, try and find one of the Castle 200 HV ICE (not 100% sure if all the Castle ESCs are having issues http://store.rumrunnerhobbies.com//hydraicehv200.html or you can see if Mike (RC-Monster) can get you one.

I definayely don't have any problem buying used, I've actually had really great experiences on the net trading and buying used and the savings can be significant and worthwhile. I'd be a happy guy if I could find an esc and motor for $100 each. Lutach's motor is 825kv so I really need something with a higher voltage rating than a cc xl2 all though I'm sure 8s would work ok, it would only produce approx 24k rpm's.
If I could find a 1200kv version 8s would work great but the more reading I do the more I like the idea a high voltage setup

Anyone have an idea on the amp load of a 8-12s setup on my heavy rig running an 825 kv 1527? Wondering what c rating I would need for batteries.

I found that thread by othelo, It's a very light 5th scale but the kontroniks esc's do seem impressive. Are they waterproof? Also, I read some info that stated they had brakes but no reverse but other info stating they had a car mode with reverse.

Here are a couple data logs of my 19lb buggy on 8s and 10s with 1527 1.5y:

http://www.rc-monster.com/forum/show...1&postcount=94

http://www.rc-monster.com/forum/show...&postcount=172

http://www.rc-monster.com/forum/show...&postcount=192

Thanks, it looks like it still pulls quite a few amps.
So you like those gen ace batteries better than turnigy or zippy? What kind of runtime did you get with them?

Yes, I like the Gens Ace better (the Gens Ace 25c had more punch than the Turnigy 40c, in my opinion) - maybe 15 or so minutes of runtime.

Waiting to here back from a couple kontronik jazz 120hv for sale listings on misc forums. I sure wish someone here would come forward with a nice esc I could buy. ;0)

To be honest, I think the 80HV would be able to do the job with a heat sink and fan as I only used the Jazz 55A as an example of how solid Kontronik ESCs are. Gear the Nemesis for around 35MPH for a long lasting fun. With tire ballooning the truck will actually go much faster (My 6S truck is geared for around 36 and went over 40), but everything will run nice and efficient. I was hooked on speed for a while and wasted a lot of $$$ on spare parts :lol:.

I think so as well, kontroniks own site says that you can double the performance with a good cooling solution.
I would of course like the 120 but an 80 would do as well.

Not much to report yet but I started a build thread anyway.
Still can't get my hands on an Esc. Once I have that I can commit to a motor that's approperiate.

http://www.rc-monster.com/forum/show...190#post419190

Decided to pull the trigger on the 1527 1.5y (825kv) from Lutach, should have it later next week I'm thinking but I'm still looking for a Kontronik Jive 120 HV so until I find one I'm not really any closer to completion. I'm waiting on some other items anyway.