Neu 1515 1y or 2.5d on 5s ? & ESC advice, pure basher.....
 

Opinion please guys, im rounding up the parts i need for a Truggy conversion, undecided which truggy yet, heavily leaning towards the Xray though, anyway in the meantime im rattling together all the elecs & i'd value a bit of input from you guys......

This truggy is NEVER gonna race, its gonna be setup as a multi-surface extreme bash truck, fair mix of grass & parking lot running with top speed runs, donughts & general marlarkying about is the order of the day.....

I know conventional wisdom dictates on 4s you run the 1515 1y & on 5s you run the 1515 2.5d, but iv seen a few vids & the 2.5d on 5s seems to have LOADS of torque, iv seen this setup on youtube pulling wheelies in an LSP, so im wondering if the 1y on 5s maybe the way to go for my needs ? my basic logic (which may be wrong !) suggests that this setup will obviousluy have more top end since it's a higher KV motor but shouldn't suffer much on the low end, is that a fair assumption or is their anything im missing ?

Quick word on ESC's aswell, im looking at using the MMM, but the "MGM Compro 160 amp, 18 cell brushless car controller" also caught my eye (i want a traditional hardcased esc).... on paper they look fairly similar as far as both run 6s, BEC, general features, usb programming, etc but the MGM is £50 more, so what if any are the benefits of the MGM over the MMM ?

Cheers all :mdr:

Andy

I'd go the 2d (not 2.5) if it was me.

MGM makes some stout controllers. When it comes time for issues, however, they are known to take a while in repair. I think you'd be hard pressed to justify the cost over the MMM.

Thanks, so basically thats the motor between the 2.5d at 1700kv & 1y at 2200kv..... is there a problem with the 1y on 5s in a truggy ? will it not have enough bottom end ? from what iv seen the low end torque on the 2.5d & 5s is immense, i thought the 1y on 5s was maybe just too quick top end for the track ?

I just feel 2200 is a bit much on 5s resulting in over 40k rpm. To compensate, you'd have to use a smaller pinion. With the large diameters of the Neus, that can sometimes be challenging.

I can't see any of the three being torque challenged. With gearing they will all do some serious acceleration.

neu are rated for 60000 rpm though. I run a 1y on 5s with no problems in a flm savage. Well actually only ran it about 3 times so far but all is well so far. the 1y on 5s is only at 40700 rpm min (3.7v per cell) and 46200 rpm max(4.2v per cell). I don't think neu would rate the motor for 60000 rpm if it couldn't be ran at that.

I don't see it as an issue of the Neus being able to handle it. As you pointed out, they can.

I see it more as an issue of being able to acheive controllable speeds through a broad range of gearing options.

Thanks again fellas, good info, all things being equal (5s, driving style etc) would there be any runtime advantage with any of the 3 ? 1y, 2d, 2.5d ?

I know nothing about the 1y, but the 2.5d is indescribable. The only thing i can say is you got to see one in person and drive it once, then this might be you :surprised::gasp::surprised::gasp::surprised::gasp ::surprised::gasp: followed by:intello::mdr:

I will be running my CRT on 5s on a tekno neu 1515 2.5d. I really didnt want anything uncontralable, and I didnt want to have to worry about heat(I guess you dont have to on a neu but I like to be safe as this is my first neu) It will be a while until I get to run my neu, as Im waiting on my MMM, but I will let you know when I get to.

1Y is to much on 5s for everyday driving. It will be great idf you want to run in short bursts, stop let things cool down and then drive again. You will wind up gearing it way down to get it to run constantly without creating a heat problem in either the motor itself, ESC or batteries. With the 2.5D (what i would recomend byt the way) you will have crazy power and speed. Gearing is the key for speed. If you want more top end to play with speed runs, just gear it up. The you can go back to normal gearing for everyday running.

dont be over focused on the limits of the Neu but usable power, I try not to surpass 40,000 rpms you can have too much power in an off road application resulting excessive wheel spin....try to keep your speed below 45 mph or you will just get fustrated

another thing to remeber about that 60,000 rpm limit. It meant as just that. a limit. It will handle burst to that kind of rpm, but to run it there for more than a few seconds without shutting down to cool after, it would overheat in no time. Neus are high quality motors that run cooler than just about anything else out there, but they arent magic.

OK, fair play, i can see what your saying guys..... so 1y on 5s is just a bit OTT, soo considering this is an allround bash truggy, what im looking for is over 40 mph, lots of torque on the way to keep me entertained with wheelies etc, with the most runtime i can squeeze out of a 5s.... is it worth considering the 2d or just go with the 2.5d ?

This project is a bit of a no-holes-bared setup for me, it's pobably gonna be a well hopped up XT8 & i dont want to underpower it, its supposed to be a MAD fun truck, but i dont want the good runtimes (compared to my background in nitro) too be ruined by overheating issues......

if run time is a a factor go with the 2.5d over the others.

I want to throw a curve ball in here if I may. Why the xray for a basher, as xrays are more race bred machines. There are plenty of other options out there that would fit the bill.

Xray for many reasons, iv owned CRT, Hyper ST & Muggy, all in their nitro form, so i dont want to repeat myself, that leaves the STR which is poorly supported in the UK (and expensive), the 8T which though i know is a top truggy i just dont think it's as robust as the Xray or the X2 CRT which isn't even out yet.....

I like Xray stuff, only owned an M18T of theirs but that was very high quality, and the XT8 has the rep' of being rock solid which is exactly what im looking for in this project..... also decided on a Truggy not MT for pure simplicity, i think most truggy drivetrains are much more suitable for BL power being designed for high power .21-.28 in race conditions.....

So, it's the 2d or 2.5d, does anyone really think there is going to be a noticable runtime difference between the two ? runtime isny KEY, unless it's a HUGE difference, but i dont want to be cutting runs short due to overheating etc is more my point.....

Cheers all,
Andy

The only thing i can tell you is that i've the 1Y on 4s li-po on my Mugen MBX5T and it's ridiculously powerfull. Smoke any nitro .28 bigblock on the track and for bashing, it's the way to go.
I realy like this motor, i've the MGM 16018 and FlightPower 5000mAh, 4s, and i'am very satisfy of my setup.

the 1y on 5s is not even close to 60000 rpm though. Not trying to argue just trying to point out i run a 1y on 5s and i never had a problem yet. Besides i like the ridiculous power it has. Not trying to sway opinions either, you guys know more than me on this stuff and i am here to learn...If i start to have problems with my 1y on 5s should i just go down to 4s or get a 2.5d??? What would be more efficiant??? Not hijacking just trying to get more ideas out there to help me and mofomaxx

Agree
 

Yea the Xray does not seem to mcuh for a basher type vehicle, but to each his own. As for too much power, isn't it possible to program most ESC settings in order to reduce output power? If so then why not go for the gusto in your motor purchase just in case you change gears in your project and decide to put the motor in a bigger project like an MT or similar vehicle later down the road? When purchasing a Neu motor the overall pricing is pretty similar in nature, so I would go with something that has the ability to go OTT for later urges that may need to be satisfied. Just a thought, but it makes sense to me. You can always dial it back a bit if you need to curve the wheelies.

As for the ESC from what I have seen and read on RCM teh MMM is a hit or miss at the moment. MGM may have their issues, but most of the issues seem to have been due to improper setups or installation, or just plain abuse. It seems to be a pretty tough ESC overall. TDC just put one(160/24) in his XRay-808 project and it took him a while to get it all straight, but now he is having a great time with that rig. He even picked up another MGM for his second project. As long as you have a little patients and set it up correctly it is one of the badest ESC's available to us. If you are in Europe repair times should not be quite as bad as in the USA. Once again it is all up to you which way to go for your own satisfaction level.

Good luck with that Man.

No proble with the 1Y on 5s, it<s just 40700rpm. A friend of me run an 1Y on 6s on a Jammin CRT truggy, and he have no problem at all.

I want to swap my brushless kit in my RC8 buggy and i,ll buy a 5s to put in the buggy, and maybe a 6s:intello:

The 1Y is rated for 25 volts, so 22.2volts is not a problem.

Anyways, nobody here run WOT all pack long, you know like me when we drive our truck we drive with short burst of triger all pack long, so the 6s on the 1Y is not an issue:wink:

For sure, if i was to buy a brand new motor, i,ll maybe choose the 2.5d if i plan to run on 6s, but i,ve already the 1Y and i,ll run it on 6s:yes:[/

Hey, why they have a line on all my words on my previous post:oh:

???????
 

Thats weird. I thought maybe you did that to be funny or to cancel whatever you were trying to convey. Looks like somebody is messing with you.:lol:

Yep! Maybe somebody don't like my answer :lol:

Right then fellas, thanks for all the input, so the 1y is defo a non starter for my application on 5s, so it's 2d or 2.5d...... 2.d will give me a little more top end, less runtime & more (potential) heating issues ? is that a fair general assumption ?

Just my 2cents from a basher who has NEVER raced. It seems a lot of these 4S setups on 2050 and 2200 kv motors work very well until you try to gear for more than 40mph. Then you start to get a lot of amp draw with the higher gearing and the motor gets pretty hot.

I kinda play the way you described in the beginning and was running a 1512 2.5d (2050kv) on 4S. It was plenty powerful, but on grass the temps really started to get pretty hot ~170*. I tried to go up to 5S or 6S to lower the temps, but with the faster motor speeds it's didn't really compensate well. Even though the Neus can handle the faster RPMs I still don't like going for setups that rate over 35k rpm at a nominal 3.7v/cell.

I had a conversation with a Castle tech a few years back and in chatting with them they brought out one point which made a lot of sense - a motor will try to get up to the speed it was designed for as quickly as possible - and will draw as many Amps as necessary to do this. So if you have a 1500kv motor and a 3000kv motor, both on the same voltage, the 3000kv motor will pull about twice as much current to get up to twice as many rpms for that voltage. So for racing it may not be too much of a problem because it's more about control than always going WOT, but for bashing it's a lot of stop and go with tons of WOT acceleration from a standstill (and on grass that equals a lot of friction your going against).

^^I guess what I am trying to say is that with a motor spec'd for 40k+ rpm at whatever voltage I think your going to be wasting a lot of current just spining up the motor.

Anyway - I just picked up a tekno 1515 2.5d to run on 6S and I am getting more powerful, smoother, cooler running everything. I am getter better runtimes on a 6S 2600mAh TP packs than I ever did on a 4S 5000mAh pack. Battery temp on the 4S used to be touching ~135 and I haven't gotten the 6S pack over ~110 now.

I would recommend for the type of bashing you want to do just what the ImpaktRC guys advertise for their tekno Neu motors on the web page. 1Y for 4S, 2.5d for 5S, and 3D for 6S. Personally I say go for the 6S setup since you are going for the MMM.

Apparently I must be the only one who does :whistle: and low kv + HV makes for a much happier setup.

Generally I run big fields and huge parking lots and that equates to being WOT a lot of the time.

I do run my rig WOT most of the time and usually not from a stopped position but I will have it rolling first this keeps the amp draw down and its a lot less wear on your drivetrain....

Interesting info again fellas, am away on holiday tomorrow for 2 weeks, so here's hoping mike has some 2.5d's in stock for my return, i think that's the way im going to go..... 5s/6s im still undecided but im hoping the 2.5d/MMM should handle it either way.....

Cheers,
Andy