R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric Off-Road

Like Tree38Likes
Reply
 
Thread Tools Search this Thread
Old 08-16-2016, 06:39 PM   #11251
JAE
Tech Master
 
Join Date: Jun 2015
Posts: 1,765
Trader Rating: 26 (100%+)
Default

Only thing i'm worried about is in a spec 13.5t class, is if this is going to create drag and slow the buggy down.
__________________
JAE
JAE is online now   Reply With Quote
Old 08-16-2016, 07:15 PM   #11252
Tech Adept
 
Pville Stig's Avatar
R/C Tech Elite Subscriber
 
Join Date: Feb 2016
Location: Texas
Posts: 239
Trader Rating: 4 (100%+)
Default Not Slow

Quote:
Originally Posted by JAE View Post
Only thing i'm worried about is in a spec 13.5t class, is if this is going to create drag and slow the buggy down.
There was no noticeable change in straight line speed or any performance drop off when i changed from the slipper to the gear diff. The car is so good out of the box that it takes alot of guys that are not very skilled and makes them faster quickly (Me).

If you haven't driven one of these yet you are in for a very pleasant surprise compared to the XB2. Steering and grip for days.....
__________________
RC America/XRAY
LRP America
AKA Products
Pville Stig is offline   Reply With Quote
Old 08-16-2016, 08:01 PM   #11253
JAE
Tech Master
 
Join Date: Jun 2015
Posts: 1,765
Trader Rating: 26 (100%+)
Default

I've used this car a handful of times on race days as a second class just to have something to do between heats. Never changed the setup until recently. I used to have more grip with my laydown xb2, before medium parts, plus the 2x2 pistion with shock rebound setup. Now, I'm about on par, so look forward to the adjustments.
__________________
JAE
JAE is online now   Reply With Quote
Old 08-17-2016, 03:31 AM   #11254
Tech Regular
 
Join Date: Feb 2015
Location: Brookhaven PA
Posts: 458
Trader Rating: 4 (100%+)
Default

Just ordered my XB4 cant wait to race this car.
BiLL77 is offline   Reply With Quote
Old 08-17-2016, 05:36 AM   #11255
Tech Fanatic
 
Join Date: Jan 2016
Location: Rhode Island
Posts: 780
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by Ironman115 View Post
When changing out the gears to the steel ones do I need to change out the the cross pins to steal to or can I leave it at the graphite plastic one
you can use the graphite ones, or the hardened alum, right now im using graphite, but im ordering the hardened alum.

Quote:
Originally Posted by JAE View Post
Looks like my 4wd game is about to get more expensive. Been driving stock 2wd with my xb2 so am trying to duplicate as much of a planted rear end feel as i can get coming from stock 2wd with no 4wd experience. thx
yeah, but honestly the xb4 requires less than the xb2 IMO. Here's what I have for the xb4...

- center diff
- steel diff gears
- hardened alum diff pins
- floating servo mount
- alum steering plate
- alum servo horn
- alum rear hubs
- alum drive cups
- 12* alum front c hubs
- TLR wingy


thats literally all you could ever need for the XB4. my xb2 has way more hops ups like all the alum roll centers and everything i have above plus more.
__________________
| XRAY XB8E 16' | XRAY XB4 16' | XRAY XB2 CE 17' |
| New England | RCE | RCM |

Last edited by lyons238; 08-17-2016 at 05:56 AM.
lyons238 is offline   Reply With Quote
Old 08-17-2016, 05:49 AM   #11256
Tech Addict
 
Djchow85's Avatar
 
Join Date: Dec 2013
Location: Sydney
Posts: 606
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by lyons238 View Post
you can use the graphite ones, or the hardened alum, right now im using graphite, but im ordering the hardened alum.



yeah, but honestly the xb4 requires less than the xb2 IMO. Here's what I have for the xb4...

- center diff
- steel diff gears
- hardened alum diff pins
- floating servo mount
- alum steering plate
- alum servo horn
- alum rear hubs
- 12* alum front c hubs
- TLR wingy


thats literally all you could ever need for the XB4. my xb2 has way more hops ups like all the alum roll centers and everything i have above plus more.
many pages back you mentioned centre spur screws running against the motor mount, did you get it sorted? I ordered official screws for those areas and hoping that's the fix

I did notice in photos and in the manual that xray screws have a lower profile with their button heads.
__________________
Lancer Corolla 3 Impreza
Djchow85 is offline   Reply With Quote
Old 08-17-2016, 05:54 AM   #11257
Tech Fanatic
 
Join Date: Jan 2016
Location: Rhode Island
Posts: 780
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by Djchow85 View Post
many pages back you mentioned centre spur screws running against the motor mount, did you get it sorted? I ordered official screws for those areas and hoping that's the fix

I did notice in photos and in the manual that xray screws have a lower profile with their button heads.
yeah the xray screws seems a tad flatter but mine still rubbed!

i fixed it by switching out 1 of the screws that was rubbing worse, then i addedd a .2mm shim infront of the bearing to give me just a hair of room.

it doesn't rub any longer but its super close. they should have designed the motor mount with a flush mount screw to avoid that issue...but its not a big deal and theres multiple ways to fix it.
__________________
| XRAY XB8E 16' | XRAY XB4 16' | XRAY XB2 CE 17' |
| New England | RCE | RCM |
lyons238 is offline   Reply With Quote
Old 08-17-2016, 11:34 AM   #11258
Tech Adept
 
EJ2civic's Avatar
 
Join Date: Sep 2014
Location: Baltimore, MD
Posts: 164
Questions?? '15 XB4 gearing

Hey gang, Im new to the 4wd buggy class and would like to pick some of ya'lls brains if ya dont mind. Im getting ready to finish a '15 XB4 project Ive been working on. I race indoor carpet and would like to know what size pinion gear would be good to start with. The buggy is set up with the slipper clutch, 81T spur, rear motor and shorty pack. I have the factory basic carpet setup sheet so I just need a good start point on the pinion gear. Since I will be in Mod 4wd buggy, I have a Thunder Power 6.5T with a HW 120a V2.1 esc.

Thanx in advance...
__________________
LOSI TEN SCTE(Powered by SMC RACING/HOBBYWING-NOVAK)*TLR SCTE 2.0(Powered by SMC RACING/HOBBYWING-NOVAK)*2017 XRAY XB4(Powered by PRO-MATCH RACING/HOBBYWING)*Wild Turbo Fans*BACH Racing*MRH Racing*AbsoluteHobbyz
EJ2civic is offline   Reply With Quote
Old 08-17-2016, 11:49 AM   #11259
JAE
Tech Master
 
Join Date: Jun 2015
Posts: 1,765
Trader Rating: 26 (100%+)
Default

I'd like to know gearing for 13.5 as well. That should cover gearing ranges for 2 motors most use. thx all for the help!
__________________
JAE
JAE is online now   Reply With Quote
Old 08-17-2016, 11:56 AM   #11260
Tech Fanatic
 
Join Date: Jan 2016
Location: Rhode Island
Posts: 780
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by EJ2civic View Post
Hey gang, Im new to the 4wd buggy class and would like to pick some of ya'lls brains if ya dont mind. Im getting ready to finish a '15 XB4 project Ive been working on. I race indoor carpet and would like to know what size pinion gear would be good to start with. The buggy is set up with the slipper clutch, 81T spur, rear motor and shorty pack. I have the factory basic carpet setup sheet so I just need a good start point on the pinion gear. Since I will be in Mod 4wd buggy, I have a Thunder Power 6.5T with a HW 120a V2.1 esc.

Thanx in advance...
17-20. i run 18 usually but i have a 5.5t motor
__________________
| XRAY XB8E 16' | XRAY XB4 16' | XRAY XB2 CE 17' |
| New England | RCE | RCM |
lyons238 is offline   Reply With Quote
Old 08-17-2016, 02:33 PM   #11261
Tech Fanatic
 
Rodarbal's Avatar
 
Join Date: Nov 2010
Location: Cedar Park, TX
Posts: 901
Trader Rating: 38 (100%+)
Send a message via Yahoo to Rodarbal
Default

Quote:
Originally Posted by JAE View Post
I'd like to know gearing for 13.5 as well. That should cover gearing ranges for 2 motors most use. thx all for the help!
I replied to your original question a couple months ago...

Xray XB4 thread

...but have since changed my gearing to something more suitable for my particular 13.5T and track. I'm now running 27/81T for a 7.5:1 FDR. Some of the guys locally are running up to a 8:1 FDR. I'd play around with gearing anywhere from 7:1 to 8.5:1 FDR to see what suites you and your track the best.
__________________
RJ Labrador
Off Road Big: Mugen, Mugen & Mugen
Off Road Little: Losi & XRay
Rodarbal is offline   Reply With Quote
Old 08-18-2016, 02:50 AM   #11262
Tech Addict
 
Djchow85's Avatar
 
Join Date: Dec 2013
Location: Sydney
Posts: 606
Trader Rating: 4 (100%+)
Default

Has anyone ran without the top decks and also without the lower chassis braces at the same time

I'm guessing it would make the chassis flex too much?
__________________
Lancer Corolla 3 Impreza
Djchow85 is offline   Reply With Quote
Old 08-18-2016, 05:36 AM   #11263
Tech Fanatic
 
Join Date: Jan 2016
Location: Rhode Island
Posts: 780
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by Djchow85 View Post
Has anyone ran without the top decks and also without the lower chassis braces at the same time

I'm guessing it would make the chassis flex too much?
there is no top decks on the 16' model. unless you mean the carbon braces that go on the plastic lower braces?

but yeah you wouldn't want to run no braces, that would be like driving a noodle around the track.

you can get medium flex lower braces if you desire more flex. i personally run the hard, with the front carbon brace on clay, and both carbon braces on carpet.
__________________
| XRAY XB8E 16' | XRAY XB4 16' | XRAY XB2 CE 17' |
| New England | RCE | RCM |
lyons238 is offline   Reply With Quote
Old 08-18-2016, 09:55 AM   #11264
Tech Regular
 
Join Date: Nov 2003
Location: Venice Beach
Posts: 288
Trader Rating: 5 (100%+)
Default

I run on small/medium sized outdoor tracks with:
Blinky:
13.5 - 26/75 (Adjust Motor Timing for track)
Mod:
5.5 - 18-19/81
6.5 - 21/81
7.5 - 22-23/81

All three motors can be tuned via esc timing for a specific track. For example, on a high bite indoor track that I sometimes visit, the 5.5 w/ 10-15 boost no turbo is wicked fast, and is very quick to spool up. On the medium sized outdoor/low traction tracks, the 6.5 or 7.5 has a more smoother bottom end, but with timing, is a missile on the straights.

I don't run the 6.5 much anymore for the tracks I have in my area.
High Traction - 5.5 is the best
Low/Medium Traction - 7.5 is the best.

IMHO, your testing may vary!
LAGuy is offline   Reply With Quote
Old 08-18-2016, 10:08 AM   #11265
Tech Fanatic
 
Join Date: Jan 2016
Location: Rhode Island
Posts: 780
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by LAGuy View Post
I run on small/medium sized outdoor tracks with:
Blinky:
13.5 - 26/75 (Adjust Motor Timing for track)
Mod:
5.5 - 18-19/81
6.5 - 21/81
7.5 - 22-23/81

All three motors can be tuned via esc timing for a specific track. For example, on a high bite indoor track that I sometimes visit, the 5.5 w/ 10-15 boost no turbo is wicked fast, and is very quick to spool up. On the medium sized outdoor/low traction tracks, the 6.5 or 7.5 has a more smoother bottom end, but with timing, is a missile on the straights.

I don't run the 6.5 much anymore for the tracks I have in my area.
High Traction - 5.5 is the best
Low/Medium Traction - 7.5 is the best.

IMHO, your testing may vary!
i find the same but i just run a 5.5t everywhere and adjust gearing/timing if necessary. i find its the best overall motor, for me anyway.
__________________
| XRAY XB8E 16' | XRAY XB4 16' | XRAY XB2 CE 17' |
| New England | RCE | RCM |
lyons238 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
EP buggies thread sim600 Malaysian R/C Racers 3586 03-30-2016 11:53 PM



Currently Active Users Viewing This Thread: 3 (1 members and 2 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 12:26 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net