"Heavy Weather" | MBS Pro 97 DWII | DV6 Pro | 6396 | 12s7p | E-Toxx Chaindrive

DIY Builds
#1

Hi folks,

The weather’s turned to shit here in the Netherlands and I’m facing the prospect of some long, dark, wet months spent staring longingly at my boards with tears in my eyes, waiting for a gap in the rain so that I can get out there and rip shit up.

It’s either that, or I build something that can get out there and brave the weather with me. Enter “Heavy Weather”: an eMTB built to handle the forest dirt trails nearby and all the hell and high water that’ll come with it.

I’ve evolved my Evolve and I’ve modded-out my DSS50+ a fair bit but this will be my first complete build. I have the budget to use the best components but I’ll be taking an MVP-type approach where I can start simple, build familiarity and then iterate-in and swap-out features and further complexity in future.

Ingredients:

  • MBS Pro 97 Dylan Warren II
    Solid platform with top-rated components such as the Metal Matrix II’s and the F5 bindings. Watching @glyphiks’s ‘Madness’ build thread closely! :laughing:
  • Focbox Unity
    Much as I’m tempted to go Vesc6, the Unity is cost effective and just makes shit easy.
    It’s already on it’s way to me from @mackann with XT90 & 5.5mm bullets attached!
  • 12s7p Liion pack
    I was looking at using lipo’s to begin with but I’m put off by their their short lifespan and the costs and effort associated with their care, handing and charging. I can’t help thinking it’s a false economy in the end.
    So the 30Q’s are standard faire here but I’m debating whether it’s worth looking at the VTC6 or the HG2? And should I be looking at handling discharge via the BMS as well?
    @pjotr47 - gonna need the support of a pro here, in case you know somebody? :wink:
  • E-Toxx Chaindrive (1:5)
    Sorely tempted to go helical mini-drive but chaindrive for the first iteration will do me admirably and it’ll keep 250 sheets in the pocket. The motor cage is also attractive after what happened to one of the cans on the LaCroix lately (thanks @Arch for coming to the rescue there!).
  • 2x 6394 ~170kv sealed, 10mm shaft
    Given I’m in NL, the inclines aren’t going to give me much hassle but I wanna favour torque over speed to drag me through some slow-going terrain …and does it really matter if I battle-harden the motors anyway?
  • Enclosures
    I’ll be using a @3DServisas Unity case on the back. I think the black and white combo will look pretty badass on the DWII.
    I decided on a Bud Industries PTS-25338. Neat little package. IP67 rated, solid polycarbonate. Not as ‘workman’s-lunchbox’ looking as these Peli cases. I’m not sure what the workable area between the feet is on the DWII (@glyphiks - can you confirm?), nor how much volume I need for the battery pack. All suggestions welcomed!
  • Maytech R2 remote
    On it’s way from @tinp123! Cheers fella!

What else am I missing?

Edits (x3)
  1. 16th Oct '19 - 12s5p
    I’ve been convinced to go 12s7p 30Q. Bam! :boom:
  2. 15th Nov '19 - 2x 6394 ~150kv sealed, 10mm shaft. I’m just damned if I can find motors to these specs. Is it me or is it only Maytech that does a sealed motor?
    If it’s gonna be heavy and it’s all about torque, then it’s gonna have to be 2x MT6396’s in the BF sale! BOOM!! :bomb:
  3. 8th Dec '19 I’m reserving judgement on the battery case though.
    Decided on the Bud PTS-25338. Ka-pow! :fire:
13 Likes
JUMPINATOR II | MBS DW II | E-TOXX | lightweight MTB
Reply to "Pictures and nothing else" thread
#2

Im in the process of making my enclosure right now and it is 290mm long… you could go to 300mm but it is already gonna be mighty close to my ankles.

12s5p will give you 75-100 continuous amps to your motors which should be ok. However, I reckon you will probably be running that pretty hard cos the top speed is gonna be easy to reach, you are building a torque monster! What’s the calculated top speed? Personally, I’d be going for a 25-30a continuous cell for this build or increasing the battery size.

Edit: there is alot of conversation here regarding discharging via BMS, search for bypass bms or bypassed bms here and at the old forum and decide what is gonna suit your needs

1 Like
#3

Cheers fella.

Top speed loaded should be around the 50 km/h mark, which is more than enough for the use-case. I’d expect the likely average to be between 30 and 40 though.

Max Torque is coming out at 44 Nm across the two driven wheels, which is a bit shy of the stock Trampa builds (@ 50 Nm).

Do you reckon it’s more sensible to go 170kv instead then (58km/h / 39 Nm)?

#4

I think it depends on your use case. It’s a good torque board the way you are thinking, but i think the 170’s will still have enough torque while giving you a good chunk more speed

Edit: i’d take the torque and use vtc6 cells :+1:

1 Like
#5

IMG_20191205_201442
IMG_20191205_2014422736×3648 3.46 MB

Alright. After nearly two months in procurement, the build is officially on!

19 Likes
#6

Oh I’m watching this one

4 Likes
#7

Mmm! So snug! :kissing_heart:

IMG_20191205_204833
IMG_20191205_2048333648×2736 2.09 MB

16 Likes
#8

First person I’ve seen use 6396 on a DIY so far I think… hot damn

7 Likes
#9

I’ve hit a snag.

@NoWind - should I have expected some long M4s to fasten the wheel drives with?

IMG_20191205_210504
IMG_20191205_2105043648×2736 2.1 MB

2 Likes
#10

Watching as well sweet looking build

2 Likes
#11

Have you figured out how to mount the wheel pulley to the hub yet? I have an e-toxx MBS chain drive kit on the way and am very interested on the mounting procedure for the pulleys to the hubs as well.

#12

I would first mount the hubs with the stand offs than the sprocket. Get some m4 screws which are 5mm longer. Should be fine than.

Nice build buy the way :ok_hand:

1 Like
#13

Remove your locknuts and then you put in the Hex Spacer !?
(-;

5 Likes
#14

@brown5tick take the 30Q for the sake of longevity. They have a better lifecycle.

Community Board Project X :wink:

#15

Vtc6 all the way!

#16

Why, to get a capacity loss of over 25% after 50 cycles?

zyklentest_vtc6_hg2
zyklentest_vtc6_hg21217×789 27.4 KB 

Sony VTC6	LG HG2

Cycle Capacity % %diff Capacity % %diff
1 2328 100,00% 2225 100,00%
2 2318 99,57% -0,43% 2190 98,43% -1,57%
3 2292 98,45% -1,12% 2190 98,43% 0,00%
4 2278 97,85% -0,60% 2173 97,66% -0,76%
5 2268 97,42% -0,43% 2173 97,66% 0,00%
6 2251 96,69% -0,73% 2170 97,53% -0,13%
7 2235 96,01% -0,69% 2129 95,69% -1,84%
8 2229 95,75% -0,26% 2141 96,22% 0,54%
9 2239 96,18% 0,43% 2134 95,91% -0,31%
10 2218 95,27% -0,90% 2118 95,19% -0,72%
11 2212 95,02% -0,26% 2145 96,40% 1,21%
12 2207 94,80% -0,21% 2111 94,88% -1,53%
13 2202 94,59% -0,21% 2118 95,19% 0,31%
14 2190 94,07% -0,52% 2128 95,64% 0,45%
15 2183 93,77% -0,30% 2096 94,20% -1,44%
16 2179 93,60% -0,17% 2119 95,24% 1,03%
17 2177 93,51% -0,09% 2101 94,43% -0,81%
18 2173 93,34% -0,17% 2106 94,65% 0,22%
19 2163 92,91% -0,43% 2107 94,70% 0,04%
20 2145 92,14% -0,77% 2055 92,36% -2,34%
21 2150 92,35% 0,21% 2106 94,65% 2,29%
22 2135 91,71% -0,64% 2106 94,65% 0,00%
23 2118 90,98% -0,73% 2079 93,44% -1,21%
24 2108 90,55% -0,43% 2096 94,20% 0,76%
25 2083 89,48% -1,07% 2111 94,88% 0,67%
26 2139 91,88% 2,41% 2114 95,01% 0,13%
27 2119 91,02% -0,86% 2117 95,15% 0,13%
28 2106 90,46% -0,56% 2100 94,38% -0,76%
29 2091 89,82% -0,64% 2063 92,72% -1,66%
30 2089 89,73% -0,09% 2079 93,44% 0,72%
31 2080 89,35% -0,39% 2072 93,12% -0,31%
32 2063 88,62% -0,73% 2061 92,63% -0,49%
33 2046 87,89% -0,73% 2061 92,63% 0,00%
34 2058 88,40% 0,52% 2045 91,91% -0,72%
35 2061 88,53% 0,13% 2046 91,96% 0,04%
36 2039 87,59% -0,95% 2033 91,37% -0,58%
37 2006 86,17% -1,42% 2034 91,42% 0,04%
38 2000 85,91% -0,26% 1990 89,44% -1,98%
39 1996 85,74% -0,17% 2007 90,20% 0,76%
40 1967 84,49% -1,25% 2025 91,01% 0,81%
41 1939 83,29% -1,20% 2006 90,16% -0,85%
42 1916 82,30% -0,99% 2016 90,61% 0,45%
43 1902 81,70% -0,60% 2002 89,98% -0,63%
44 1896 81,44% -0,26% 1996 89,71% -0,27%
45 1852 79,55% -1,89% 1979 88,94% -0,76%
46 1834 78,78% -0,77% 1973 88,67% -0,27%
47 1822 78,26% -0,52% 1960 88,09% -0,58%
48 1799 77,28% -0,99% 1954 87,82% -0,27%
49 1750 75,17% -2,10% 1945 87,42% -0,40%
50 1727 74,18% -0,99% 1934 86,92% -0,49%

IIRC the 30Q has a loss of aprox. 5% after 50 charges. Their is no better 18650 cell for ESK8 right now.

2 Likes
#17

what enclosure is that 3d servisas on the back?

#18

That graph say it starts at like 2300mah. The vtc6 is 3000mah. Yes from what I have seen the 30q has a better life cycle but the vtc6 has a higher output. I currently only have 30q packs but I just bought a ton of vtc6 cells for super cheap. I will soon be able to test for myself if they truly degrade that rapidly.

#19

They charged the cell to a certain voltage and than compared the life cycle.

The result was after 50 cycles 1727mah 74,18% -0,99% for the VTC6 and 1934mah 86,92% -0,49% for the HG2.

1 Like
#20


:wink:

@brown5tick , sick solid build, good diy :+1:

4 Likes