Notices
RC Electric Off-Road Trucks, Buggies, Truggies and more Discuss electric RC off-road, buggies & trucks here. Also discuss brushless motors, speed controllers aka ESC's, brushed motors, etc

1/7 custom build

Old 06-01-2016, 10:12 PM
  #1  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default 1/7 custom build

Attached Thumbnails Click image for larger version

Name:	1.jpg
Views:	189
Size:	256.5 KB
ID:	2165452   Click image for larger version

Name:	2.jpg
Views:	185
Size:	278.0 KB
ID:	2165453   Click image for larger version

Name:	3.jpg
Views:	184
Size:	248.4 KB
ID:	2165454   Click image for larger version

Name:	4.jpg
Views:	194
Size:	307.3 KB
ID:	2165455   Click image for larger version

Name:	5.jpg
Views:	154
Size:	304.5 KB
ID:	2165456   Click image for larger version

Name:	6.jpg
Views:	147
Size:	306.4 KB
ID:	2165457   Click image for larger version

Name:	7.jpg
Views:	153
Size:	304.7 KB
ID:	2165458   Click image for larger version

Name:	8.jpg
Views:	144
Size:	312.9 KB
ID:	2165459  

Click image for larger version

Name:	9.jpg
Views:	152
Size:	422.4 KB
ID:	2165460   Click image for larger version

Name:	10.jpg
Views:	148
Size:	358.6 KB
ID:	2165461   Click image for larger version

Name:	11.jpg
Views:	149
Size:	284.4 KB
ID:	2165462   Click image for larger version

Name:	12.jpg
Views:	156
Size:	370.6 KB
ID:	2165463   Click image for larger version

Name:	13.jpg
Views:	149
Size:	306.9 KB
ID:	2165464   Click image for larger version

Name:	14.jpg
Views:	146
Size:	323.0 KB
ID:	2165465   Click image for larger version

Name:	15.jpg
Views:	152
Size:	290.2 KB
ID:	2165466   Click image for larger version

Name:	16.jpg
Views:	160
Size:	121.7 KB
ID:	2165467  

Click image for larger version

Name:	17.jpg
Views:	171
Size:	88.6 KB
ID:	2165468   Click image for larger version

Name:	18.jpg
Views:	153
Size:	101.6 KB
ID:	2165469  
Old 06-01-2016, 10:18 PM
  #2  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default

Im using dual toro x513 1080kv motors and four 4s 8000mah lipos.
Old 06-01-2016, 10:18 PM
  #3  
Maj_Overdrive
Senior Member
My Feedback: (11)
 
Maj_Overdrive's Avatar
 
Join Date: Dec 2007
Location: Long Island, NY
Posts: 1,554
Likes: 0
Received 0 Likes on 0 Posts
Default

Very cool looking build. What are your plans for the motors and cell count?
Old 06-02-2016, 10:01 AM
  #4  
The Saylors
 
The Saylors's Avatar
 
Join Date: Apr 2016
Location: Tacoma, Wa
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
Default

I'm not familiar with that motor but that's a whole lotta lipo lol. Are you gunna use a single esc or multiples? More curious than anything
Old 06-02-2016, 10:15 AM
  #5  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default

two esc's, Im gonna try with both motors in sync with each pole so it acts like 4 poles. Then ill try with a 45 degree offset and have them act more like an 8 pole motor, both spur gears are locked to each other. I might try this out too http://alienpowersystem.com/shop/esc...esc-hv-twin-2/

Last edited by SAMPchains; 06-03-2016 at 10:22 AM.
Old 06-02-2016, 11:36 AM
  #6  
The Saylors
 
The Saylors's Avatar
 
Join Date: Apr 2016
Location: Tacoma, Wa
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
Default

That's interesting. I have never seen that brand before, I'm assuming its a small company doing a lot of the work by hand (which can be a very good thing if they care). Only thing that i don't see is if there is an integrated BEC. You may not need it for that project buts it's just usually a red flag to me as far as the level of thought that was put into a product, but there are naturally exceptions to all rules for sure. Just something to consider especially if you are gunna run dual servos and things like that. I have seen the dual brushless esc and motor setups in some of the summit projects were they use a dual motor plate and put the esc's in sequence so that they turn each other on. Pretty cool stuff!
Old 06-02-2016, 11:49 AM
  #7  
EXT2Rob
My Feedback: (1)
 
EXT2Rob's Avatar
 
Join Date: Dec 2010
Location: Placerville, CA
Posts: 3,220
Likes: 0
Received 0 Likes on 0 Posts
Default

Pheew!
Old 06-02-2016, 12:46 PM
  #8  
The Saylors
 
The Saylors's Avatar
 
Join Date: Apr 2016
Location: Tacoma, Wa
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
Default

Man that is a seriously thick chassis. That thing will probably be literally bullet proof, at the very least a .22 round lol
Old 06-02-2016, 01:35 PM
  #9  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default

haha, it feels extremely strong, ive dropped it many times and it just sounds like a rock.
Old 06-02-2016, 01:39 PM
  #10  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default

I have no cnc, lathe, or a mill. Ive been using a drill press and hacksaw. If you put the material in the chuck it acts like a lathe and you can get centered holes in rods. its what i do for the bushings.
Attached Thumbnails Click image for larger version

Name:	1.jpg
Views:	204
Size:	292.4 KB
ID:	2165533  
Old 06-02-2016, 01:45 PM
  #11  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default

I made a new steering horn from 6.35mm aluminum instead of that 3mm one I had before. feels much better. both sides are connected with a link. going to use a 1/5 scale servo because they are really strong for the price and I need the strength. You can get some nice servo saver horns for them as well.
Attached Thumbnails Click image for larger version

Name:	2.jpg
Views:	167
Size:	171.2 KB
ID:	2165534   Click image for larger version

Name:	3.jpg
Views:	190
Size:	154.5 KB
ID:	2165535   Click image for larger version

Name:	4.jpg
Views:	191
Size:	205.1 KB
ID:	2165536  
Old 06-02-2016, 02:26 PM
  #12  
The Saylors
 
The Saylors's Avatar
 
Join Date: Apr 2016
Location: Tacoma, Wa
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
Default

I am quite impressed that you were able to get to that level of craftsmanship with the tools that you're using. Very good work. What is the total weight so far?
Old 06-02-2016, 02:40 PM
  #13  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default

its 5.5 pounds right now, which is with the gears, pulleys, drive cups, pretty much the entire chassis. I want this to be heavier than usual so that it handles a bit more realistic.

I tried this setup before which is rampage XB stub axles and drive cups, which are both 10mm OD with kershaw 10mm ID 17mm hubs, but the kershaw measured 10.45mm ID and I can't deal with that much slop, plus the thread for the nut is separated from the hub so when you tighten the nut even a little bit the bearings get really tight.
Attached Thumbnails Click image for larger version

Name:	5.jpg
Views:	163
Size:	151.5 KB
ID:	2165540   Click image for larger version

Name:	6.jpg
Views:	23
Size:	143.2 KB
ID:	2165541   Click image for larger version

Name:	7.jpg
Views:	165
Size:	163.6 KB
ID:	2165542  
Old 06-02-2016, 02:42 PM
  #14  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default

I don't know how i put that thumbnail of a drive shaft there, but it was something i tried awhile ago.
Old 06-02-2016, 02:48 PM
  #15  
The Saylors
 
The Saylors's Avatar
 
Join Date: Apr 2016
Location: Tacoma, Wa
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
Default

That's awesome! I was figuring that you be in the neighborhood of 8-10lbs. With all that motor and lipo this will be a bullet as well as an ankle breaker for sure lol. And it looks like the thumbnail attached on the second to last post so you must have done something right.
Old 06-02-2016, 03:09 PM
  #16  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default

haha yup, it's geared for 90 mph with the 15T pinion, but i have a 10T as well wich I didnt calculate yet, but I think ill have enough torque with those motors anyways. The Gears are 1.5 mod too. It has a 400mm wheelbase and 300mm track width, so a xo-1 body will fit great, but id rather use the corvette body they make.

I could also use GRP wheels with these square drivers.


But I will not make an on road setup yet, I will be using an sc8/ apache sc body and I will have to extend it by 20mm. I could also remove the front pulley and have RWD only.
Attached Thumbnails Click image for larger version

Name:	8.jpg
Views:	158
Size:	143.0 KB
ID:	2165556  
Old 06-02-2016, 03:11 PM
  #17  
The Saylors
 
The Saylors's Avatar
 
Join Date: Apr 2016
Location: Tacoma, Wa
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
Default

That's a good plan that way you get a "do it all vehicle". I like smart builds
Old 06-02-2016, 03:27 PM
  #18  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default

Green ones are shock mounts, blue is camber for the links.


the inside blue circle will be what Im using for camber because as the suspension goes up the wheel will stay straight so that i can have lots of travel since the link will be about the same length as the lower suspension arm, but if I use the outside blue one I should be getting more camber because the shorter link wont have enough length as the suspension goes up. shocks mount in front of the tower, and suspension links mount in the back. I dont know any rod ends out there that have a 4mm id hole which is what i need, but i guess ill search for them later on.
Attached Thumbnails Click image for larger version

Name:	9.jpg
Views:	163
Size:	241.6 KB
ID:	2165572  
Old 06-06-2016, 08:29 PM
  #19  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default

Will add the second motor later down the road. decided to make my own motor mounts instead of the kershaw one. now the motor sits closer to the center and i can use all 4 screws.

Attached Thumbnails Click image for larger version

Name:	1.jpg
Views:	170
Size:	153.2 KB
ID:	2166698   Click image for larger version

Name:	2.jpg
Views:	163
Size:	282.5 KB
ID:	2166699   Click image for larger version

Name:	3.jpg
Views:	168
Size:	259.6 KB
ID:	2166700   Click image for larger version

Name:	4.jpg
Views:	163
Size:	255.2 KB
ID:	2166701   Click image for larger version

Name:	5.jpg
Views:	162
Size:	214.8 KB
ID:	2166702   Click image for larger version

Name:	6.jpg
Views:	168
Size:	263.1 KB
ID:	2166703  
Old 06-07-2016, 06:04 AM
  #20  
Maj_Overdrive
Senior Member
My Feedback: (11)
 
Maj_Overdrive's Avatar
 
Join Date: Dec 2007
Location: Long Island, NY
Posts: 1,554
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by SAMPchains View Post
its 5.5 pounds right now, which is with the gears, pulleys, drive cups, pretty much the entire chassis. I want this to be heavier than usual so that it handles a bit more realistic.

I tried this setup before which is rampage XB stub axles and drive cups, which are both 10mm OD with kershaw 10mm ID 17mm hubs, but the kershaw measured 10.45mm ID and I can't deal with that much slop, plus the thread for the nut is separated from the hub so when you tighten the nut even a little bit the bearings get really tight.
I hear you about the slop, but if you want to use them anyway you can fix the bearing issue. Simply put a shim between the bearing and hex. The shim should be only as big as the inner race of the bearing to prevent the HD from contacting the rest of the bearing. This will compress the inner race of the bearing against the rest of the axle but you not be able to reform it or anything.

If if you want to replace the hex have a look at the sponsors of Redcatrampageforum.com. There's 7075 and others with various hexes available there.
Old 06-07-2016, 08:14 AM
  #21  
The Saylors
 
The Saylors's Avatar
 
Join Date: Apr 2016
Location: Tacoma, Wa
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
Default

it stays within the boundary of the pan so i think that's a win as far as your new motor placement. The bottom of the chassis is more hex heads than aluminum lol
Old 06-07-2016, 09:27 AM
  #22  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default

Good idea maj, I installed the redcat stub axles before and I just taper the edges of the hex a bit so no binding, but the bore hole for the kershaw hex is way bigger than 10mm. I used a sleeve to fix it, but In the end I didn't stick with it because even the outside of the hex is actually 16.85mm and not 17mm. Its not a big deal, but it might cause some stripping of the wheel hex with all the power. So I found a 1/5 scale stub axle with 8mm diameter shaft and I used a 9mm offset 17mm hex so I can fit two M6 set screws. The new 17mm hex is 17.07mm and it fits amazing, It even snaps into the wheel. I can still change things around if the 8mm shaft isn't strong enough.

I am really big on no slop, thats why I change the cvd pins and barrels slightly larger and bore new holes at the right tolerances. I can't feel or hear any slop in the cvd's. Im using Losi 5ive driveshafts and the stub axle is made from a lot of companies (mcd/cen/smartech). So when i fit them together they fit amazing because the cv end of the 5ive is 15mm exact and the ID of the stub axle is 15.2mm. (losi stubs are 15.35mm). Also the pins and barrels are made of o1 tool steel, the metal is annealed, but idk if the should harden them because if I only harden the cv shaft and stub axle, They will last forever and id just have to replace the pins and barrels, they are actually a great bushing material and with great tolerances, it should last a long time. Maybe ill just heat treat them at a lower temp and dump them in oil instead of water, It should cool it down a bit slower unlike water wich will cool down much faster, But so far they are the best cvd's Ive ever handled.

Attached Thumbnails Click image for larger version

Name:	7.jpg
Views:	180
Size:	202.4 KB
ID:	2166756  
Old 06-07-2016, 09:29 AM
  #23  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default

haha it is a lot of screws, but that's all of them, not gonna add anymore.
Old 06-07-2016, 09:44 AM
  #24  
SAMPchains
Member
Thread Starter
 
Join Date: Jun 2016
Posts: 49
Likes: 0
Received 0 Likes on 0 Posts
Default



The cap screws on the motor had to be taken out and filed down. they were sticking past the mounting surface, they will prob rust in a couple seconds if water touches them, but oh well. I can change them out to stainless later. gears mesh very nice.
Attached Thumbnails Click image for larger version

Name:	8.jpg
Views:	157
Size:	264.6 KB
ID:	2166757  
Old 06-09-2016, 08:00 AM
  #25  
seedygreenute
 
Join Date: Jan 2016
Posts: 307
Likes: 0
Received 0 Likes on 0 Posts
Default

Now that's a motor mount !!!

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.