Need hv-maxx to 7/8/9/10l comparison!
 

I currently have the hv maxx which I have now run, and it does have good smooth power, but whats the harm in MORE!?!

I am wondering if anyone has run both of these setups (hv maxx and somthing like the 9920 and 7/8/9/10 combo?

I do like the fact that the novak is very smooth. I have never run a non-sensored brushless, so I have no experience with cogging. One thing I do like to do with my trucks every once in awhile (might take time out of runs to do this) is go slowly try to climb stuff...rocks/curbs etc. Do you think the cogging will not allow me to smoothly operate at the low speed stuff?

Also, I am not totally sure what motor I should run. I have had the 9l and the 7xl reccomended to me. The only problem I see with the 7xl is the cell rating, which is 14-18 cells. the 9l can run 12-16. I am pretty lazy when it comes to batteries, and I already have a few 6 cell packs I would like to be able to run. Is the difference between the 7xl and the 9l worth running min of 14?

The packs I will mostly be running are IB3800 6 cells, and IB3800 7 cells.

The two things I want, are power and runtime. I would probably be gearing for a top speed of 25-30 mph. I like to run as long as possible, but also like power!

I am still lost as what to go with. It looks like the warrior 9920 is the only viable controller for me, at 200. but then again the mamba maxx isnt out yet, so I dont know how that will compare.


Any help is greatly appreciated!

I have never had a Novak. But I consider my 7XL very smooth. The 9L is no big stutterer too.

The 7XL CAN be run at 12 cells. It performs great, in fact. I mostly run mine on 14 cells, and it's a blast.
30mph is no problem. On both motors. But I like the 7XL better, it runs cooler, more torque, not as fast as the 9L, but with very nice runtimes.

I gear my Revo for 35-40mph on 14 cells, and 40-45 on 16, and it's a really nice ballance of all the things I want. And it comes on smooth. Cruising around the house gives me very long run time.

DAF

Dafni you know what a man likes to hear!

sorry that came out wrong!

LOL... so it can be safely run on 12 cells? I saw it is rated for 14-18. I guess it makes sense it can run on a lower voltage.

What kind of average runtimes do you get with the e-revo on 14 cells geared for 35-40?

I might gear a couple times for high speed, but other than that I dont have the space to be running that fast, so tops would be probably 35.

I do like torque! Hmmm I think I might just have to get the 7xl. You should be a salesman dafni!

Maybe I should ask Mike to pay me! :)

Runtime depends on driving style, but I manage to drive the Revo under race conditions for 10mins without feeling a change in performance.

If you crawl around and hop some curbs, with the occasional short brake to enjoy a smile, runtimes of more han 30 mins are well possible.

Can't go wrong with the 7XL. And if you feel the need for speed, you can always strap a 3rd 6pack on.;)

Cheers
DAF

I didnt think about that before...it can handle 18 cant it!?!? lol HMMM

I think I am going to go with the 9920 and 7xl combo with the heatsink/clamp.

How reliable are these controllers? I have heard some horror stories of controllers dying. for 200 I really cant afford to do this more than once!

What do you gear your e-revo? I usually like to run big tires (imex k-rocks and proline 40 series mashers) and then I have a set of standard sized bow-ties for the track.

He's just telling the truth...

;)

that 9L on 16 cells is not done.. (unless you want to fry it) ;)

My choice would be the 7XL as well.

I had a bigmaxximum/schulze 18.97, and this 7XL is just smoother. the sensorless systems being hicky and stuttering are over.. No big power setup is made with sensored as well. You simple don't need it.

As for gearing, what pitch do you run? 32p or mod1??

Well as of now I have the stock emaxx spurs (well a few anyway) so I could run either.

looks like the 7 xl has a 5mm shaft, so I will have to buy pinions either way. Mod 1 are really beefy right? So maybe that would be the best choice to have the best spur gear life?

I will have to look into what the cost of mod 1 spurs cost.

Get a strobe slipper from Mike ;) along with the Ofne Mod1 51t spur.
A 14 or 16t pinion would work well for the 7XL.

(stock diffs assumed. Look for a 1:18 to 1:16 final reduction)

The 7xl is a great motor. For crawling I think a 8 or 9Xl does better. The 7xl does real well though. JMO


I changed my avator serum. No confusion no more. :D

strobe slipper gets my vote too! mod1 is much stronger, and the slipper pads of the strobes can handle more than the stock slipper

Alright I might have to go with the ofna 51t and the strobe setup.

Country, why do you say the 8 or 9xl does better for crawling? I am a brushless noob essentially, so bare with me! It dosnt look like mike has a 8xl or 9xl? what does the longer can do, more torque?

All XL cans are the same size. The number is the wind.
The 8 or 9XL have a lower rpm/volt rating.

so if its a lower rpm/volt, would that equate to more efficiency/run time?

the big tires would be better suited for teh 7xl instead of 9l.

is this because the 7xl has more torque than say a 9l? what about a 9xl? then I wonder if an 8xl would be better all around? (between the 7 and 9?)

too bad I dont know somebody with these motors so I could see first hand the power/torque and efficiency.

Well, if u go for the 8xl or 9xl, u'll need more batts to make up for the lost rpm. U'll probbably loose some overall speed to. Stick with 7xl. We might not have people here that has a 8xl or 9xl. But we got the best mods that will help anyway they can...as long as u buy form Mike, lol j/p!

Coolhand has got the 9XL (or was it the 8XL, i thought it was the 9XL) and he is very enthusiastic about it. Long runtimes and it stays cool as well. If you are planning on staying in the 12-16 cell range, stick with the 7XL and for a 18-20 cell setup go for the 8XL

The kv ratings Feigao shows are for an unloaded motor.

alright ya I plan to run 12-14, with the rare running of 3 - 6 cell packs for 18 cell madness :)

Looks like hte 7xl is the one to get.

I have run the 9xl with 14-18 cells. It does well with all. I think it is a little smoother than the 7xl. I had a 7xl as well. The 9xl has more run too. I do some curb climbing as well as a few hills. I also do a few speed runs. I can get 30 minutes of hard bashing country style. I only got about 10-15 out the 7xl with same batteries. The I can stick 12 cells on mine and tell you what kind of run time and speed with what gear if you like. It is no biggy.

^^ That would be VERY much appreciated. Do you run 3300s, or other cells? Also, is this on an E? what does it weigh and what tires do you run?

For the price I can get 6 cell packs, it would be awesome to be able to run those and have decent power and run times.

When you "hard bash country style" lol is this just a mix of full throttle blasts and messing around without stopping? I would LOVE to get 30 minutes of pretty hard bashing on 12-14 cells, but still have good power and smoothness. was ur 30 minutes on 18 cells? I suppose if running on 12 cells really sucks, I could always run 3 6 cell packs, but I do prefer to keep the weight down.

Also, where did you get the 9xl? Anybody know if mike can get them?

I am interested to know if it is like brushed esc's, where you can run less cells and get better run time. I used to run 6 and 7 cells on my 540 brushed motors, and the 7 cells added a nice bit of performance, but at the cost of slightly less run time. Hopefully the 9xl can still get up and go pretty well on 12 cells and not have a flat lazy like performance.

the Hv-maxx only draws 30 amps right?.....

I will have to do the test on gp 3300. I found some info on another site to.
5XL 6-10 cells
6XL 8-12 cells
7XL 10-16 cells
8XL 12-18 cells
9XL 12-18 cells
10XL 12-20 cells
11XL 18-24 cells
12XL 18-28 cells
13XL 18-32 cells
14XL 24-32 cells
My truck is a little heavy. about 14 lbs ready to run with 18 cells. Yes it was with 18 cell of gp 3700. about 25 min with 3300. I run dirt hawgs with ue rears 2 speed tranny. I have the gmaxx double extended. Mike can get you the 8 or 9xl. It will be the wanderer series by bk. same as feigao with better bearings. I will have to charge batteries up and get back to you on the run time. Batteries are charging now.

HEre is the thread on my truck.
http://www.rc-monster.com/forum/show...5&pagenumber=1

with gp 3300 that have set 4 weeks. Charged them up only took 2384 on one pack and 2465 on the other. Discharged them before chargeing them to. start time was 7:43 stop time was 7:59. Speed was about like the hv maxx with alot more power. I hope this helps roost. I not trying to tell you to get the 9xl. I just think it works better on crawling aspect. That was speed run with donuts and all.

16 mins dosnt seem too shabby on packs that were about 2500mah or so?. so speed was probably 30-35?

Now I dont know if I should go with the 7xl or 9xl? What kind of power difference was there between the 7xl and 9xl on the same cell count? If the power is similar, I am definately digging the extra 15 or so minutes extra run time you got (how many cells were you running on each, 18?)

This also makes me think, what about the 8xl? wouldnt that be between the 7 and 9? lol. Decisions decisions!

I can get any of these motors(in fact,I have them already ordered). Truthfully, I think you will be happy with any of them. the 7xl is probably more suited to 12 cells, but any of the motors can be geared to perform quite well. You won't see the run time country got with 18 cells if you only run 12-he simply has 1.5 times the power supply so will therefore get more runtime. For 12 cells, the 7xl is probably the best choice.

The overall power will be the same, because you would be using the same cells. But, you would have to compensate for the 9XL's lower kv to get it to run as fast as the 7XL. The 8XL should be a good motor for the -n-between. Better runtime than the 7XL, but faster than the 9XL.

Well what really intrigued me was the 25-30+ minute run times!

I really REALLY like my packs to last, as I hate changing packs. Would the reason to get more runtime with more cells, be that you just have MORE power, so you are not using the maxixmum power as often?

I would really like to be able to run these 6 cell packs, but I think running 3 of them for 18 cells might be a bit much, both on the power aspect, and on the weight aspect.

I never thought it would be this hard to pick a darn motor!

Hey, roost.. Just buy'em all....

saves you the hassle of regret... :)

So with the 7XL on 18 cells you can get 15minute run times?

That is some hard running sometime. I have an oval in the back yard we race around like nascar. Two long straights with swooping corners. I have a lot of room so my truck gets run wide open a lot. IF you was to go out and run a truck like some other people talk could get more. 7 8 and 9 xl are all great motor. I just like the smoothness of the 9 better than 7. It will go slow enough to count the tread.

Well, to get 15 minutes of runtime on 18 cells... you'd only be running the motor at 13.5Amps or lower.... That's around 300 Watts.... It is possible... Know what I mean... 300 Watts is probably enough for just to have fun with.. but if you're pumping out 100Amps(2100 Wats) to the motor consistantly, it's only goin' to last like 2 minutes.... But the motor doesn't usually use up that kind of amps continuously.... Unless, you're always giving it a heavey load like on an incline, in bushes, or constantly accellerating hard... :) This is what I think.. I don't know how true it is.. .:)

Ff you go to with a higher turn, there's less cogging............ Would this be true guys..?

from what I have tried. yes it seems to be less cogging. Difference in timing makes a difference in cogging as well.

I like the idea of smoother and more torque with the 9xl, but I am wondering if I will be giving it enough cells to be happy? (when it is happy, it would make me happy :) ) Maybe I just need to breakdown, buy the 6 cell sticks, and assemble them as 7 or 8 cell packs.

I am not totally sure what you are looking for. The 7xl does good. the 9xl does good. I can not speak for the 8xl. 12 cells kept motor cool running with enough power to tote the front wheels. 14 pound gmaxx with double extensions. My truck is 21.5inches bumper to bumper. speed runs 7xl crawling 9xl. I wish I had an 8xl to test for you. For that matter I would like to test a 10 xl out for me. lol Hope this helps. Sorry if any confusion. I think you will be happy with any of the about picks. Power wise the 7xl put out more power than 2 hvmaxx systems. So does 9xl.

So for all around stuff (general bashing / crawling / with some high speed runs through fields/parking lots every once in awhile), maybe the 9xl would be better? Would you still agree to that last statement if it was only being run on 12-14 cells?

So basicly what your saying is if you don't go full pelt all the time it lasts upto 15minutes? So whats the point of having the extra 2 cells? Just to have the power ready when you want it? :D

Well dafni got 30 minutes on the 7xl (dont know cell count) and country got 30 minutes on the 9xl (I beleive 18 cells).

So yes extra voltage means the power is there. And since there is MORE power, you wont be using the MAX power it has very often, where as if you had fewer cells, it would take a lot more throttle to get the same acceleration you want.

^ that is my take on it anyway, any of our resident BL experts can clear this up if I am wrong!

I think the difference in runtime is play area. I have alot of open area around me. alot of speed. It is not unusaul for me to get me truck to full speed every time I pull the trigger. The 9xl is the longest I have gotten out of a set of batteries. The only other thing close is the 14L I had. It was about the same. Just like the power of the 9xl better. 12-14 cells will flip my truck. I have to have it on grass to get maximum traction. It just spins on concrete and such. I think you will be happy with all of the above. I just putting options out there. If all else fail split the difference with a 8xl. I have not tried one so. I will curious to what you get as well.