need help selecting motor for rc8
 

I have commited to convert my rc8 to brushless.
was wondering what motor would be the best to run on 4s at the moment.
I am only looking for nitro like speed,maybe a little more,but want as much runtime as possible.
I will be running 2 2s 5000mah 20c lipo's.
thanks for any help,
Kevin

What is your budget?...Esc

If you want the best, a NEU is the best motor to choose...on 4s go w/the 1512 2.5 D F (2000kv) If funds are an issue, a 9xl would work w/a heat sink. It really depends upon how deep your pockets are and your individual set up choices.

I am not unlimited funded,but only want to buy it once.

you could also go with a Medusa 2000kv motor price and quality between a Feigao and a Neu...costs

Feigao=$80
Medusa=$125
Neu=$250

or buy a few from hobby city, less than $30 each. comparable qauality to the feigaos!

how about the 2d? (2550kv)? maybe too fast though, but its what im waiting for from castle (still hasnt been sent out since my payment on the 30th of april...)

Neu 1509 1.5y
Medusa 50mm 2200kv
Medusa 60mm 2000kv

Each will give you nitro speed and plenty of runtime.

from what I have heard from posts on this forum and others is that the quality is much worse from the Hobby City Feigao clones compared to the original Feigaos

Geez... worse than a Feigao. So basically only good for a very strong refrigerator magnet.

If you only want to buy it once then buy the best. Get a Neu. I agree with the recomendation of the 1512/2.5D. It will give better than nitro performance and excellent run time.

what is the deal with the 1515 motors?
are they to much torque for the buggy's?
I think I will be buying a neu,just trying to find out the characteristics of the neu's.
so much info out there,hard for me to decipher the differences in the motors.
I really appreciate all the help and the info.

has anyone seen anything on the rc tekno conversion kit for the rc8?I heard they are
ready to be released in a week or so and was thinking about getting it,the 8ight kit looks great.There are many ways to do the conversion now with rcpd,novak,tekno,rcm.which one do you go with?I could also fab up my own "kit".
Thanks again,keep the info coming,
Kevin

I run a 1515 in a converted Revo(about 10lbs) I have the wide ratio gear set in the tranny and have geared up the pinion/spur to 38/18 and still get wheelies if you are not careful. I would go with the 1512

The 1515 are also fine in a buggy. I have run a 1515 in my buggy many times. It doesnt really drive much different that the 1512. It will get slightly lower motor temps than the 1512 but it also gets slighly less run time. The 1512 is plenty of motor for a buggy and motor temps are still fine as well. If you plan to race it go with the 1512 to save the weight IMO but a similar kv 1515 would be fine as well if you want to go that route. A 1515 would give you the option of carrying a little taller gearing if you wanted to gear it up for crazy top speeds, but on the track you really dont need more than 40 mph and the 1512 can easily provide that. (and more if you want it)

I am partial to the RC-Monster stuff. The original and still the best IMO. The Tekno stuff does look nice, but the clutch is a negative IMO. I tested a setup with the Tekno Clutch and didnt care for it at all. The direct drive is the better way to go for electric. (At least for my driving style it is.) The clutch also forces you to run the mechanical brakes and in a buggy I didnt see any benefit. (just more weight and complication) I do run mechanical brakes in my brushless truggy and do like having the brake bias ability, but truggies require a diferent driving style to be fast and the fast guys tend to have a little more "loose" style than the fast guys in buggy where it reqires a little more precision to get around the track fast.

I would be using the direct drive on the tekno kit,f/r brake bias doesn't seem to be a must have on this buggy.I have the brakes 50/50 now.
I think I am going to buy the 1512,rc-m has them in stock:party:

You'll be very happy with the 1512 on 4s.. Did you get the 2.5 or (??)

I'll be ordering the 2.5 as suggested,is the rear motor cover needed for clay track racing?

For the RC8 with stock gearing 4s and the 1512/2.5d Id say start with 18T-20T pinions. Depending on how big your track is. That should be a good place for you to start. 37-41mph. Thats what I find to be nice solid track speeds that allow you to balance run time and power.

awesome,what I needed
thanks,
Kevin

I have changed my setup a little,while I am waiting for the conversion kit.
I think I am going to go ahead and run 5s 5000 pack.
would the 2.5 still be the choice,or would the motor choice change?
Thanks again,
Kevin

On 5s if you are looking for nitro comparable power I would say drop it down to a 1512/3D (1700kv) motor. It will give you more runtime and cooler temps thatn the 1512/2.5D on 5s. Still coparable power to the fastest nitro and a bit more so no worries there.

Another thing... If you are going to jump to 5s you can go with a smaller pack than the 5000mah 5s packs. They start to get a bit bulky in a buggy. A 5s 4000mah pack has the same amount of energy in it as the 4s 5000 pack you were going to get. and for a racing setup the lighter weight battery will help the handling a bit. I run 5s and the 1512/3D in my race buggy and love it BTW. Any enerland based 5s 4350 pack is perfect IMO and will easilly let you run a 15 minute main. I can just squeeze 20 minutes out of a 5s 4350 pack, but in a long main like that I go with the 5000 just to be sure and sacrafice having to carry the extra weight.

great info,I mainly will be using enerland cells.
I'm getting a great deal on a brand new tp extreme 5s 5000 pack.
I will just use the 4s setup in my revo

another thing to remember is as you get heavier it will increase your amp draw due to a heavier strain on the motor

Wow 5s is going to move your buggy really well,:yes: it ran mine so fast I needed to go back to 4s just to keep it on the track..:oops: (but i cant drive :party:) Best of luck sounds like a great project cant wait to see some pictures / vid..

I just ordered the 1512 2.5 from rcm,took a bite out of my wallet,but should be worth it

Oh well its only money....LOL

:lol::lol::lol::lol::lol::lol::yipi::party:

:yes: Nice choise...:yes:

I have the 2.5D in my RC8 and running stock gearing. I am going to try a 17 and 18 next for a little top end boost but tbh I run a fair sized track and am able to hang with any nitro except a few of the better motors. lots of grunt on the infield though. I'd like to try 5S but I'll wait for V2 of the MMM for that. on 4S the MM is doing fine.

how would you suggest to gear it on 5s?

The only problem you will find with gearing is room. With the 2.5D F (finned) I had to dremmel a couple fins off the motor to clear the chassis brace. To get a lower gearing you should invest in a larger spur, like a 46 (I am using the stock 44 with a 16 like stock gearing). you could also drill a new hole in the chassis and mount the brace on the other side of the cvd

ok,thanks

well a little update,
I came across an 8ight really cheap and I had one of the tekno kits in stock at the store,so I converted the buggy using the neu.
I love this thing,geared with a 13 pinion it is really fast,a little to fast for the track,turned endpoint down to 75% with a 5s tp 25c 5000 pack.
I get 20min's runtime with temps for the motor 150-160,esc110-120,batt temps were 110-120.
Should I be concerned with the batt temps?cutoff is 16v.
I tried it on one of my 4s 25c tp 5000 batteries,had to turn endpoints back up to 100%,runtime was still 20min's same temps same gearing,was noticibly slower,but was manageable.

Should I get more runtime than I am?Would I get more runtime running 5s with 75% throttle or 4s 100% same gearing for both setups?
mm is setup lowest timing,low start power,50% punch control,12.4v for 4s 16v for 5s cutoff's
Thanks for any info,I will be posting pics as soon as I find my cable to transfer pics.

I run the 1515 2d 2050kv on 4s in my rc8...I was going to use the 1512 but mike wanted me to go with the bigger motor to help balance the chassis and offset the weight of that battery...it's what he runs in his buggies.

I forgot to mention mike also wanted me to use the larger stronger 1515 at a lower rpm to make gearing easy. because a 16 tooth pinion is the smallest you can use.