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Old 12-26-2016, 07:51 PM   -   Wikipost
R/C Tech Forums Thread Wiki: Xray XB2 2WD Buggy Thread
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Last edit by: dgrobe2112
Instruction manuals: (C/O BentKa)

Xray XB2 Carpet Edition Instruction Manual
http://www.teamxray.com/xb2/2016/dow...ual_v2_low.pdf

Xray XB2 Dirt Edition Instruction Manual
http://www.teamxray.com/xb2/2016/dow...w.pdf?update=2

BentKa: Carpet Edition 4 gear to 3 gear laydown conversion parts:
  • Gearbox #323014
  • Motorplate #324012
  • 36T idler gear #324236
  • Brace for waterfall #324031


Socket: Bodies Available:

Xray has two OEM bodies, the .75mm and the .50mm light weight:
light weight: https://www.amainhobbies.com/xray-xb...329701/p492942

OEM .75mm: https://www.amainhobbies.com/xray-0....329700/p477762

Also, I've fitted the yz2 body, both the light and regular fit fine, just make your own cut lines:
https://www.amainhobbies.com/yokomo-...z2-101/p417674


[i] J Concepts S2 Body [i]


Penguin Racing makes a high grip body that fits the DE and CE:
http://www.ebay.com/itm/X-Ray-Xb2-Hi...oAAOSw1S9WewHV



Socket: Wheel fitment:

According to some, you'll require different offset rear hexes to use B5M wheels. According to my Hudy setup board, B5M wheels are the same offset. I measured the overall width of the car with XB2 wheels, and then again with B5M wheels, same measurement.

On the front, B5M wheels were 1.5mm wider. Xray offers hexes to reduce width -.75 on each side, or you could spend 3-5 minutes and sand your OEM hexes down .75mm.

edit by dgrobe2112
here are the hubs for losi and AE

for AE Front 365354 -0.75
for Losi rear 365358 +3.00 (4 stripe)
for AE rear 365359 +3.75 (5 stripe)



Socket: Flex and the XB2:

Flex screws are as follows:

Plastic bulkhead between motor and waterfall. Can remove screw in chassis, or remove bulkhead altogether.

Waterfall has 4 screws, can remove the inner two or outer two. IIRC, removing the inner two provides more flex, and thus more bite.

Removing the battery brace. This gives a tremendous amount of flex on the middle of the car, and can sometimes be inconsistent. I do this for outdoor racing on low bite. I like the feel over the 4 gear in 17.5 racing, since the 4 gear will take some snap away off the corner.

Rear C block - has inner and outer screws. I haven't played with this, as it's a crucial pivot point of the car.

Medium arms and towers -> I don't believe the carpet car has the rear medium tower available, however the DE DOES have an optional hard part. I think the hard parts are more consistent, especially when it gets hot (90+ degrees F). However, the medium parts do NOT break unless you're severely talented. They also don't wear out.



Socket: Avid/Schelle Slipper mod:

Credit to WillS, Matt Trimmings, and myself for figuring this out months ago.

Parts you'll need:

B5M V2 3gear compatible top shaft.
TKO Special 5x13x5 bear OR 5x13x6 bearing Either can work. This replaces the spur side bearing on the top shaft.
5mm shims, same shims used in 1/8th scale clutch bells. Look for protek .1mm and .2mm kit.
Avid or Schelle b5m top shaft kit, with spur gears of your choosing. (DE can't handle a 69, the CE can)

Shimming: You'll need to install the bearing in the front portion of the removable piece for the shaft. Make sure the bearing is pushed all the way in. With the TKO bearing, you'll need to shim approximately 1.4mm on the front side of the top shaft. Roughly .3-.5mm with the other bearing. This is a "feel" and tolerance setting. I urge you to watch videos about setting clutch bell play in 1/8th scale to get an idea of what yield you want for end play. Too tight, it'll eat bearings.

Outside of trans case: Use Avid/Schelle top shaft spacer plus .2mm shim to offset slipper from motor plate perfectly. Install slipper as instructed, and use Avid/Schelle spring and XB2 slipper nut.

- NEW - Schelle now sells Xb2 Topshafts. They include a spacer, so no need for shims in gearbox, and comes with the smaller bearing. Both methods work.

Socket: Yokomo Differential or MIP pucks:

Credit to: WillS for figuring out pucks, and as well fitting the Losi 22 diff with the same mods.

Parts needed: Yokomo Bmax2 or YZ2 complete diff OR Mip PUCKS outdrives
Xb2 diff gear
Bmax2 V3 Worlds rear dog bones, or Bmax 2 pucks dog bones
You'll use XB2 axles, and will require no other mods for the axles or dog bones.
You'll need .2mm outdrive/diff shims. Shim approximately .5mm on each side of the diff, behind the bearings. The top portion of the transmission is what "sets" the diff in place, not the bottom half. A little play back and forth is fine, the stock diff has some play from the factory.

dgrobe2112: CE to DE conversion:
along with the parts needed.. you MUST have these following hardware, or it wont work

https://www.teamxray.com/xb2/2016/do...conversion.pdf

(3) XRAY 902340 M3x40 button head screws. these are the screws that mount the motor mount to the tranny
(4) XRAY 903322 M3x22 counter sunk screws. these are for the rear diff case, to mount to the chassis. i think i used some M3x18 and they worked ok.

Socket: Best method for setting up the XB2 ball diff:

The XB2 diff is stellar when setup correctly. The spring is too short and soft, allowing the diff to slip. You'll need to glue the rings to the outdrives with just a drop of CA, then add a 1mm shim between the spring and the outdrive. This preloads the spring and stops the diff from slipping so easily.

OR, you can run the AE diff spring, which is both slightly longer, and stiffer. The overwhelming issue is the stock spring allows the nut to bottom out on the outdrive before the diff is tight enough.

This shim:
https://www.amainhobbies.com/xray-al...a303122/p12070

This diff spring (don't need a shim, then.)

https://www.teamassociated.com/parts...thrust_spring/

Functional Aftermarket parts: (Not just bling!)

Servo Horn: (The B5M sized horns are too short to get full throw)
https://www.amainhobbies.com/protek-...800-bk/p273496


Socket: Exotek has a full suite of parts, some bling, some not. Here's a list (all fit DE and CE, unless otherwise noted):

Titanium front axles: http://www.exotekracing.com/xb2-titanium-front-axles-2/

Rear Hanger, HD (Adds 4 grams): http://www.exotekracing.com/xb2-rear...75-heavy-duty/

Brass C block, 18 grams added: http://www.exotekracing.com/xb2-rear...-brass-weight/

Alloy front camber mount: http://www.exotekracing.com/xb2-fron...er-mount-7075/

Carbon Fiber Chassis: http://www.exotekracing.com/xb2-carb...m-plate-2-5mm/

Alloy rear hubs:http://www.exotekracing.com/xb2-allo...ub-set-2-7075/

Alloy servo mounts, allow for use of LP servo:http://www.exotekracing.com/xb2-xb4-...-alloy-1-pair/

Titanium shock mounts: http://www.exotekracing.com/xb2-xb4-...shock-posts-2/

Slipper Eliminator: http://www.exotekracing.com/xb2-direct-spur-mount/
Xray eliminator is #324100

dgrobe2112: 2016-2017 new 3 gear laydown
Gearbox #323014
Motor plate #324012
36T idler gear #324236
Brace for waterfall #324031

dgrobe2112: Xray Spring Rate Conversion:
front C WHT
368174 2 str 0.65-0.85 3.71-4.85

358184 2 dot 0.65 3.71
368185 3 dot 0.72 4.11
368186 4 dot 0.80 4.57


Rear
368273 2 str 0.35-0.45 2.00-2.57

368284 1 Dot 0.35 2.00
368285 2 Dot 0.40 2.28
368286 3 Dot 0.45 2.57
368287 4 Dot 0.50 2.86

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Old 06-12-2016, 06:06 PM   #3196
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and ball diff!!
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Old 06-12-2016, 06:13 PM   #3197
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Quote:
Originally Posted by roadrage View Post
Hey guys, can anyone direct me to a "how to" video setting up an off road 1/10 video? I'm coming from an on road back ground so I am not too fimilar with kick up and how to adjust droop settings on my xb2 for example. Thanks in advance!
hi
i dont have a video for it but i know very good thread named tune with camber links. it has very good details about everything in offroad buggies. thread is too long about 150 pages. Therefore, i suggest you to look at page 18, 56, 58 and 86. hope this helps. you can also download hudy offroad setup instructions from xray's website.
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Old 06-12-2016, 06:38 PM   #3198
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and ball diff!!
thanks for the input. been running a ball diff since day one with the car. running 1.6 pistons all the way around and the rear camber link is just about as long as you can go. using the farthest back farthest out hole in the hub. running the shocks in the rear is the only thing I havent tried. going to try that this week. have a 37/63 weight bias.
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Old 06-12-2016, 07:15 PM   #3199
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I almost gave up on my CE on Medium/high bite. however had a gear diff. Combination of the ball diff (I know you already did this), and super stiff front spring, and shocks in the rear did the trick. I was 3 dot front 2 dot rear. My ride height was accidentally about 2mm higher in the front than rear and that did great for traction. When I evened it out it got a little slicker so I added about 20 grams of weight with stick on weights under the transmission case behind the
Motor. I did this as I didn't want to commit to the brass hinge pin mount. Had enough traction even running a 160 gram super slim shorty. On a side note my rear camber links were on the outer hole of the ball mount for more aggressive steering. Track was Ocrc on med-high bite. High bite clay no traction issues whatsoever and was looking to ease traction rolls. My 2 cents hope this helps you

=walter white;14564432]thanks for the input. been running a ball diff since day one with the car. running 1.6 pistons all the way around and the rear camber link is just about as long as you can go. using the farthest back farthest out hole in the hub. running the shocks in the rear is the only thing I havent tried. going to try that this week. have a 37/63 weight bias.[/QUOTE]
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Old 06-12-2016, 07:46 PM   #3200
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I also got weight under the battery like 20gr?
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Old 06-13-2016, 02:50 AM   #3201
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How does one get zero anti squat but maintain either 3 or 4 degrees toe in? Thx much everyones help has been great!
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Old 06-13-2016, 05:45 AM   #3202
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Toe is adjusted by moving the hinge pins side to side, anti-squat is adjusted by moving the hinge pins up and down relative to the other side. So for zero anti squat you'd move the front side of the hinge pin down by 1*, and the rear up by 1*. Stock anti squat is 2* so you'd take one away at the front side, and one at the rear side.
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Old 06-13-2016, 07:45 AM   #3203
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In case you guys didn't notice it, I've created the Wiki for this thread. Similar to the old '1st page' posts, but now it appears at the top of every page.

Anyone can edit it, but just keep in mind that EVERY edit is recorded and we can see who did it. Abusing it will result in a forum ban.

My suggestion is that if you have a new item you want to post on the Wiki and aren't sure if you should, just post it in the normal part of the thread and ask. If you see a majority in agreement, post it.
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Old 06-13-2016, 07:46 AM   #3204
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Quote:
Originally Posted by Bob Barry View Post
In case you guys didn't notice it, I've created the Wiki for this thread. Similar to the old '1st page' posts, but now it appears at the top of every page.

Anyone can edit it, but just keep in mind that EVERY edit is recorded and we can see who did it. Abusing it will result in a forum ban.

My suggestion is that if you have a new item you want to post on the Wiki and aren't sure if you should, just post it in the normal part of the thread and ask. If you see a majority in agreement, post it.
AWESOME. Our "first post" is nothing short of a non-paid advertisement. It'll be great to consolidate real data into the wiki.

Thanks Bob!
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Old 06-13-2016, 07:47 AM   #3205
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Quote:
Originally Posted by Socket View Post
AWESOME. Our "first post" is nothing short of a non-paid advertisement. It'll be great to consolidate real data into the wiki.

Thanks Bob!
You're welcome sir
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Old 06-13-2016, 05:23 PM   #3206
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ok i got the 4 gear trans...was there anything else i needed to get to install it?
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Old 06-13-2016, 07:26 PM   #3207
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Can any one tell me the spring rates in number form? A 1 dot equals a 2.2 for example. Thank you
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Old 06-14-2016, 01:33 PM   #3208
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http://site.petitrc.com/reglages/BuggyBigBoreSpring.pdf

has comparables of major competitors as well

Quote:
Originally Posted by roadrage View Post
Can any one tell me the spring rates in number form? A 1 dot equals a 2.2 for example. Thank you
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Old 06-14-2016, 06:23 PM   #3209
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Good info thank you!
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Old 06-14-2016, 08:11 PM   #3210
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NP
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Last edited by JAE; 06-14-2016 at 08:47 PM.
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