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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 01-23-2017, 05:07 PM   #4441
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Quote:
Originally Posted by fast-ho-cars View Post
Dgrob, do you know if a front sway bar is in the works for XB2's?
There is nothing in production at the moment. Think I heard rumors of them testing though
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Old 01-23-2017, 05:16 PM   #4442
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Only if you are placing shocks on the rear of the rear arms

Quote:
Originally Posted by rider313 View Post
There is a spacer that goes between the tower and transmission case, did you install it?

https://www.amainhobbies.com/xray-xb...323550/p477728
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Old 01-23-2017, 07:25 PM   #4443
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Sure was fun to watch Malin go toe to toe with the pro's here in the US. Have to say she did a super job. Congrats to her.
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Old 01-23-2017, 08:06 PM   #4444
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Quote:
Originally Posted by JAE View Post
Only if you are placing shocks on the rear of the rear arms
Correct, which slapjack is trying to do.
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Old 01-23-2017, 08:21 PM   #4445
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Quote:
Originally Posted by rider313 View Post
Correct, which slapjack is trying to do.
Yea that is what I'm trying to do... but damn I've never seen that part and idk how many times I've looked at all xb2 parts on Amain so not sure how I didn't know about it. I just placed another order today too. But thank you. I'm ordering it right now. Should get here in time for this weeks race anyways.
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Old 01-23-2017, 08:23 PM   #4446
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should have come with your buggy when you bought it.
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Old 01-23-2017, 08:25 PM   #4447
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Quote:
Originally Posted by rider313 View Post
Could be the fronts are overpowering the rears in terms of grip. Are you saucing? try saucing only the inside half of the front and Full on the rears.

Here is my setup. Front wing is in the low position.
http://forum.teamxray.com/xform/inde...setup=xb2_2016
Quick question on your setup. I noticed your running more ballstud shims on the outer end than on the inside (3mm on rear hub and 1mm on the rollcenter holder). Wouldn't I get more traction in the corners if that was reversed (lower rollcenter)? Or did you have plenty of traction the way it is? Or were you trying to get the car to rotate more in the corners or something like that?
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Old 01-23-2017, 08:40 PM   #4448
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lower rear roll center, decreases rear grip on corner exit.. the higher the roll center, the more grip you have at corner exit.

lowering the inner camber link, on the tower, raises the roll center, and raising the inner link lowers the rear roll center.

its opposite on the outer. higher shims outside.. higher roll center, less shims lower roll center.

this will blow your mind.. on the lower arm.. its backwards.. inner pin, raised, raises roll center, outer pin raised lowers roll center.
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Old 01-24-2017, 06:20 AM   #4449
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Quote:
Originally Posted by dgrobe2112 View Post
should have come with your buggy when you bought it.
I bought it off RCT and the person didn't include it for some reason.
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Old 01-25-2017, 12:43 PM   #4450
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Anyone running short link locations on the inner camber link mounts over the stock locations? If so what were your thoughts? Running on medium traction clay track.
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Old 01-26-2017, 10:03 AM   #4451
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Where do yo u find Malins Worlds setup for her xb2? Cant seem to find it anywhere
Thank you
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Old 01-26-2017, 10:48 AM   #4452
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Default I think this is it...

Sorry that was the XB4
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Old 01-26-2017, 09:01 PM   #4453
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Quote:
Originally Posted by JFuel11 View Post
Anyone running short link locations on the inner camber link mounts over the stock locations? If so what were your thoughts? Running on medium traction clay track.
I am, I like a shorter link in the rear to help the cars rotation and it help give more rear grip on power...
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Old 01-27-2017, 12:36 PM   #4454
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Suggestions for titanium screw kit for the carpet car? Something other than the Lunsford and Protek kits?
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Old 01-27-2017, 12:45 PM   #4455
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Suggestions for titanium screw kit for the carpet car? Something other than the Lunsford and Protek kits?
BentKA just posted some on Facebook a day or so ago. I cant remember the brand though.
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