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Xray XB2 2WD Buggy Thread

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Xray XB2 2WD Buggy Thread

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Old 05-04-2019, 06:44 PM   -   Wikipost
R/C Tech ForumsThread 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) or add 1.5mm carbon avid spacers



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 03-05-2018, 11:36 AM
  #5521  
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Anyone try to dye the Xray wheels? I'm not a huge fan of white wheels either.
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Old 03-05-2018, 12:32 PM
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Looks like proline only makes xb4 front wheels, maybe 2wd fronts and some rears will come out soon.
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Old 03-05-2018, 02:04 PM
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Originally Posted by LAGuy View Post
Yes, higher rear RC will help with rotation.
Also try 2* anti-squat, 1* rear toe & heavier diff fluid. All will free up the rear off power and help with rotation/steering.
Rear sway bar & higher front RC will add steering too.
Heavier rear diff fluid takes away off power steering.
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Old 03-05-2018, 02:23 PM
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Originally Posted by racingnewb View Post
Looks like proline only makes xb4 front wheels, maybe 2wd fronts and some rears will come out soon.
we are using the proline b6 wheels on the rear in our 18 cars.. and the -0.75 hubs with proline B6 fronts.
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Old 03-05-2018, 02:34 PM
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Originally Posted by dgrobe2112 View Post
we are using the proline b6 wheels on the rear in our 18 cars.. and the -0.75 hubs with proline B6 fronts.
Have you noticed any negative affects being that the rear width is 3mm narrower with the AE rims?
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Old 03-05-2018, 02:53 PM
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More rear grip. But I'm also running xb4 rear arms.
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Old 03-06-2018, 04:58 AM
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Any news about a 2018 dirt edition?
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Old 03-06-2018, 08:17 AM
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Originally Posted by shark2288 View Post
Heavier rear diff fluid takes away off power steering.
Thicker rear diff fluid reduces rear traction while cornering. Freeing up the rear will result in the car rotating better and, in effect, feels like more steering. But we can agree to disagree. Obviously its very simple to test for yourself.
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Old 03-06-2018, 08:54 AM
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Originally Posted by LAGuy View Post
Thicker rear diff fluid reduces rear traction while cornering. Freeing up the rear will result in the car rotating better and, in effect, feels like more steering. But we can agree to disagree. Obviously its very simple to test for yourself.
Shark is correct. Heavy fluid will reduce steering on corner entry and give more on-power steering corner out. The opposite is true when going with lighter fluid in a gear diff.
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Old 03-06-2018, 09:04 AM
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Originally Posted by LAGuy View Post
Thicker rear diff fluid reduces rear traction while cornering. Freeing up the rear will result in the car rotating better and, in effect, feels like more steering. But we can agree to disagree. Obviously its very simple to test for yourself.
a diff allows the outside tire to spin more than the inside tire around a corner as needed. A heavier diff oil makes it harder to turn the wheels at different speeds both on and off power.. heavier diffs help your car to put down power coming out of corners and in a straight line, lighter diffs help your car to turn corners better.

finding the magic spot in this is the key..

Diff fluid has nothing to do with traction of the car.. only the driveability of the car. too light of a diff.. and the car will feel loose both on and off power, too heavy of a diff and the car wont go around a corner, and push on power.
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Old 03-07-2018, 12:25 AM
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#320900 Complete XB2 Dirt Rear Suspension Conversion Set

• Complete conversion set
• Convert XB2’18 Carpet into dirt car
• Generates more traction
• Increases stability
• Used by factory team


Complete rear suspension conversion set including ball differential to convert XB2 Carpet 2018 version into a car suitable for clay tracks. This conversion set includes wide rear suspension arms from XB4 kit as well all other parts necessary to upgrade the car into the specs as used by the factory team as well Ty Tessmann at the recent Reedy Race.

Includes:
#323325 Alu Rear Longer Lower Susp. Holder - Narrow - Rear (10mm)
#323353-M Composite Rear Upright - Medium
#325002 Ball Adjust. Diff for 2.5mm Pin - Set - HUDY Spring Steel™
#325323 Rear Drive Shaft 71mm with 2.5mm Pin - HUDY Spring Steel™
#327310 Rear Suspension Pivot Pin 3x46 mm (2)
#363111-H Composite Suspension Arm Rear Lower Right - Hard
#363121-H Composite Suspension Arm Rear Lower Left - Hard
#365357 Alu Wheel Hub 12mm - Offset "+2.25mm" (2)
#367320 Rear Arm Pivot Pin (2)

Fits: XB2'18 Carpet.



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Old 03-08-2018, 11:08 AM
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Some new goodies... I really like the motor plate.

New Exotek XB4 alloy hubs, carbon fiber battery strap, and XB2 motor plate :: LiveRC.com - R/C Car News, Pictures, Videos, and More


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Old 03-09-2018, 11:18 AM
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I’m thinking about ordering this or the Schumacher KC.

Have you ran them both?

It looks like amain carries more parts for the xb2 but I haven’t searched too hard yet.

I’m sure either car will out perform me lol
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Old 03-09-2018, 11:36 AM
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Originally Posted by tksnobords View Post
I’m thinking about ordering this or the Schumacher KC.

Have you ran them both?

It looks like amain carries more parts for the xb2 but I haven’t searched too hard yet.

I’m sure either car will out perform me lol
I would think you will get mostly biased opinions here for a reason. Schumacher makes a more than capable car but are very fragile. Parts are not easy to get even for team drivers. If you are only running on carpet and dont hit anything or no one ever hits you it might be the car for you.
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Old 03-09-2018, 12:21 PM
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Originally Posted by Pville Stig View Post
I would think you will get mostly biased opinions here for a reason. Schumacher makes a more than capable car but are very fragile. Parts are not easy to get even for team drivers. If you are only running on carpet and dont hit anything or no one ever hits you it might be the car for you.
Thanks for the reply. Sounds like the Durango I ran a while back.

finishing the race is important lol
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