My BL Savage
 

Hiya all, I've been watching these forums for awhile and thought I'd sign up!

This is my electric Savage, I got a rolling chassis on ebay for $150, and I had it electric within the hour that it came. For now I have an old Modeltech brushless setup running on 12 cells. Soon I'll be running on an 18 cell brick pack where the engine usually is. Once my budget allows that brick of nimh will be replaced with lipolys!

Here are the pics! (sorry for the blurry-ness, my camera is acting funky)
http://i17.photobucket.com/albums/b5...7/DSC01194.jpg
http://i17.photobucket.com/albums/b5...7/DSC01195.jpg
http://i17.photobucket.com/albums/b5...7/DSC01196.jpg
http://i17.photobucket.com/albums/b5...7/DSC01199.jpg
http://i17.photobucket.com/albums/b5...7/DSC01202.jpg
New motor mount that places motor on top of transmission, allowing me to fit the 18 cell brick pack where the engine/gas tank usually mounts:
http://i17.photobucket.com/albums/b5...7/DSC01236.jpg

http://i17.photobucket.com/albums/b5...7/DSC01237.jpg
Hope you enjoy!

Bah, you again! :D Nice truck.

O.K. fill us all in, whats that meen?

Oh yah, nice truck E-Traxxer.

Them moabs look awesome on that truck. It looks good. welcome to the forum.

Thanks for the compliments guys, although it's not done yet. I'm going to try to fit a 1/8 scale buggy center diff, so I can have more room for batteries, and it's always a nice thing to have.

JOHNNYMAXXIMA, I know Dabid from another forum, so he was just greeting me in his own way. :L:

Nice! I happen to like those BL savages.. :p

What motor is on it? A 9L?

Oh, for right now I just have an old modeltech motor in there (similiar performance to a 12L I think). A 9920 is on the way to control this beast, and I'm soon going to order a 7 or 9XL, along with a whole slew of 5mm pinions. This should be running by next weekend, and I'll have a video if nothing goes wrong *crosses fingers*.

if not sure why not a 8xl. It is between the two

Once I decide on the amount of cells I'm going to run (5 or 6s lipoly) I'll decide on the motor. Im leaning to 6s, because more power is always better, but 5s will be easier to manage and I can have more runtime. The 7XL is at its max at 6s, so I may end up getting the 8XL. The thing is, Mike only has 7XL's. :W: My ultimate goal for this Savage is to fit a center diff tranny from a 1/8 scale buggy AND being able to fit packs that are ~140mm in length, allowing me to get two 3s lipoly packs with 8000mah in between the chassis plates, so they are fully enclosed and protected! It will also be more cost efficient to do this, as I can use the lipolies in my other trucks, rather than buying more stuff. Glad you guys like it, but it is far from done to say the least! :D

YOu will get more run time on 6s than 5s. You will also get more run time on 8xl than a 7xl. I can get 25-30 min on gp 3700 18 cells on a 9xl. witha lipo 8000mah with less weight and such looking at an hour of run time. I have not ran a 8xl so can't help there. Mike has some 8 and 9 xl coming. supposed to be in any day now. They are bk wanderer 20 series.

Yeah, he posted the exact same thing on URC, so I was just greetin' him.........kinda cheesy, I know. :)

I really want a purple motor! As far as I know, the wanderers are blue, correct? I may just go with the 7XL on 6s lipo, it's pushing it, but it should be fine the way I drive. As for the 6s Lipoly and the 5s lipoly, why would there be a difference of runtime? More power to the motor therefore decreasing the load on the motor? Thanks for the help :)

Dabid, don't worry about being too cheesy. I like cheese. ;)

I ordered a 7XL, along with a few other motors for my other projects last night. If all goes well shipping-wise, this should be semi-finished by next weekend. I'm going to have to wait on the lipolies, but I may be able to fit an Ofna Ultra LX 8th scale diff fairly soon, the only thing that is holding me back is getting some custom driveshafts. I could just see if two rear shafts will work. I'll see once it comes in the mail.

All this talk about the 7xl........what's so dramatically different in the powerband than say a 9L (close the the Lehner 2800xl I have now)? I realize that it's more versitile as far as running more cells (like a 16 cell limit, right?), but what else makes it stand out as a great motor for monsters?

To my knowledge, the longer can helps dissipate heat, and I think it provides a bit more torque than an L series, maybe similiar to a 540 compared to a 550 motor?

The longer rotor and more wires will provide greater power handling capability, causing the system to run more efficiently when more power is required. The extra surface area of the can does also will allow better heat dissipation (as E-Traxxer said).

the increase in torque is a big help dabid. You have to run one to see. I have run the xl2000,14L nemisis, 7xl feigao. and 9xl nemisis. It is a big difference in the power of the xl motors over the xl 2000. Comparing the two is like comparing a 19 series to a 22 series. The torque is different. I have a video of a 9xl and a 14L the 14 l is on 18 while the 9xl is on 16.

Nice looking savage! Id be really interested in seeing your batteries fitted inside, thats what my plans are for my brushless savage since im running 1.5 extended tvps.
Im a little confused now as to what motor to buy with all this talk of 7,8,9..L and xl lol I wanna run lipo's so what should I get?

i would definately recommmend an xl. how many lipo cells? 6 is the max on the 7xl. if you wanted to run 6s i would probable get the 8xl. any more than 6s and i would recommend the 9xl.

6s would be the most....How many sub c cells can you run with the 8xl? And where can you get this motor? Dont see it listed on here...

mike can get it im sure. uh, not sure as to how many but im sure it more than 20. probably like 22-24ish. more than anybody would want to run.

Last I talked to mike about this. He said he had some coming. It is the wanderer 20series by bk. I think they going to be around a $100. don't quote me on this. He was going to get 8and 9xl motors in.

Are those as good as the Feigao motors? Or are the same thing.

there essentially the same thing but have better bearings. i.e. there better.

Once all of my orders come (Fast Lane 40mm extended chassis, Ultra MBX center diff, 7XL, and 9920) I'll be ready to roll! I really want to get this done by the 19th, but I may have to wait on the controller because they just sent an e-mail to me that it was backordered :P: . Hopefully all will go well and I can jumble this thing together by my "deadline." If the 9920 doesn't come by then, do you think a 7020 on 16 cells will be able to handle the job? I'm going to be running a BEC pack..

Yes and no on the 7020. If you gear down pretty good you can get some run time out it. It is more than likely still heat up and thermal. I fried my 7020 on a 7xl. I had it geared kind of high. It will be good for a test run and such.

If you have to run a 7020, definitely put a fan on it.

I'll be putting on an oversized heatsink as well as a fan on either controller, so the temps should be fine.

Just took the pics, It's not completely done yet, I still have to wait on the aluminum for my motor mount, my 9920, and a few other small things (wheelie bar!). I don't have everything in place right now, either. The rear center driveshaft was hitting the chassis plate, so I have to grind that out, unfortunately, my dremel just died (curse black and decker dremels!) it was only a month old, too! The truck looks sweet on person, and I'm anxious to get it all finished! I'll try to shoot a vid once it is up and running.



Here are the pics: (sorry for the blur, camera battery was dying and I couldn't adjust the birghtness settings)
http://i17.photobucket.com/albums/b5...7/DSC01248.jpg
http://i17.photobucket.com/albums/b5...7/DSC01249.jpg
http://i17.photobucket.com/albums/b5...7/DSC01250.jpg

Here's a Pic with the motor sitting where it will be when I make the motor mount: (this motor is huge! 7XL)
http://i17.photobucket.com/albums/b5...7/DSC01251.jpg

Great mate!

i ordered that same chassis for my savage, in order to build in a centerdiff.

that skid, where is it on the site of FLM, can't find it..

It's halfway down the Savage products page, theres a version for the extended or non-extended. The chassis is awesome! It's stronger, but it's also 40 mm longer. Are you putting a center diff in the regular transmission, or just putting in a buggy diff like mine?

With just the center diff, are you going to be able to get the gearing down where it needs to be? I know even the 1/8th buggy guys have issues with gearing low enough for brushless, so I would think it would be even worse in a savage with the taller tires.

Use a lower KV-rated motor. A 7XL is too hot for this setup. (on 12 cells it would work though)

I think that is the reason for E-traxxer to ask if i used it in the savage transmission. The HB lightning uses a 10/43 diff ratio though.

Is the 7xl too hot because he's running a center diff? I can't really remember seeing a Savage with a 7xl before, but would it be doable if you keep the stock tranny?

yeah, very doable!

Would it cog as much as my 9L does, or does it go smoother?

Smoother. It simple has got more magnetical power to get the train moving.

It's finally done!!! I have my 7020 in there still, my 9920 hasn't come yet. I can fit 18 cells inside the chassis, so they are completely protected :)

Without further ado, here are the pics, hope you enjoy!

http://i17.photobucket.com/albums/b5...7/DSC01252.jpg

http://i17.photobucket.com/albums/b5...7/DSC01253.jpg

http://i17.photobucket.com/albums/b5...7/DSC01254.jpg

http://i17.photobucket.com/albums/b5...7/DSC01255.jpg

http://i17.photobucket.com/albums/b5...7/DSC01256.jpg

http://i17.photobucket.com/albums/b5...7/DSC01257.jpg

http://i17.photobucket.com/albums/b5...7/DSC01258.jpg

Well, I just got out for a test run. I must say I'm not too impressed, but then again, these batteries ARE stick packs, and they weren't recently charged. It's really glitchy, the steering is responding fine, but when I peg the throttle for a few seconds, the motor seems to be getting power, then losing it, then getting it back again. I think I'm overgeared a bit too, the motor was cold to the touch, but the ESC was 97 degrees after around 5 minutes, and I never even went close to full throttle. Anyone have an idea why my truck is spuddering? (And no, it's not cog :P ) Could any interference be caused by the motor being so close to the receiver?