248LikesXray XB4 thread
11-15-2015, 04:04 AM
#9346
Add another person who agrees with 100K in the center diff. I run on a high bite clay at two different tracks and 100K works the best for me. Anything higher than that and the car gets too twitchy and the front wheels over power the rear wheels, causing the rear of the car to get slung around . . . especially when trying to power out of a turn.
The XB4 is not "that" different from the other popular 4wds with 3 gear diffs (i.e. D413, B44.3) and those cars also seem to run optimally at 80-100K in the center diffs as well. I own a D413 as well and run 100K in the center of that vehicle and again, it proves to be the fastest/most consistent set-up for me.
The XB4 is not "that" different from the other popular 4wds with 3 gear diffs (i.e. D413, B44.3) and those cars also seem to run optimally at 80-100K in the center diffs as well. I own a D413 as well and run 100K in the center of that vehicle and again, it proves to be the fastest/most consistent set-up for me.
Your problem with the rear stepping out is your setup……nothing else (assuming you run the correct tires for the surface).
I've helped tons of people at different tracks with the exact same issue……
You guys are running lower center diff oils to mask your setup problems……like everyone else running low viscosity oils.
Running lower center diff oils will let the front wheels pull the car trough corners and mask your problem with the correct setup and balance.
You will have a car that rotates slow and sends too much power to the front wheels reducing overall traction = SLOW
But you are all entitled to running whatever setup you want
Bent
11-15-2015, 04:14 AM
#9347
I sold my 15 because I kept trying the heavy center diff fluid. I ended up using 500k after 1mill and it was better but not nearly as fast as my yok with slipper. I've tried almost every set up on the Xray site. The car was best with stock set up with center slipper. On medium bite indoor clay.
I have 15-20 people every single day on messenger, email, forums and through Facebook I help with setups.
I discuss the same exact issues over and over again……and if I where to have lengthy discussions on the exact same issues 20 times a day I would have to quit my day job
So I need to cut through and just get the info passed on.
This will also make it easier to find info later on instead of having it spread out over 50 pages of endless back and forth discussions.
But people are free to try out my suggestions or not.
And you're free to just ignore my posts or even block me……I can take it
The results and advice I'm passing on is from team members responsible for developing the very parts you're buying……and believe me…..between us we have tried every combination possible to find the best results
Bent
11-15-2015, 04:15 AM
#9348
Tech Master
iTrader: (77)
This right there……..first of all it's wrong…….a thicker center diff oil will put the power distribution MORE towards 50/50 and make sure the front wheels does NOT overpower the rear wheels.
Your problem with the rear stepping out is your setup……nothing else (assuming you run the correct tires for the surface).
I've helped tons of people at different tracks with the exact same issue……
You guys are running lower center diff oils to mask your setup problems……like everyone else running low viscosity oils.
Running lower center diff oils will let the front wheels pull the car trough corners and mask your problem with the correct setup and balance.
You will have a car that rotates slow and sends too much power to the front wheels reducing overall traction = SLOW
But you are all entitled to running whatever setup you want
Bent
Your problem with the rear stepping out is your setup……nothing else (assuming you run the correct tires for the surface).
I've helped tons of people at different tracks with the exact same issue……
You guys are running lower center diff oils to mask your setup problems……like everyone else running low viscosity oils.
Running lower center diff oils will let the front wheels pull the car trough corners and mask your problem with the correct setup and balance.
You will have a car that rotates slow and sends too much power to the front wheels reducing overall traction = SLOW
But you are all entitled to running whatever setup you want
Bent
I drive my D413 on the exact same tracks with the exact same tires. Again, once I lowered the center diff oil to 100K, my XB4 drove on par with my D413 and they were both extremely consistent and fast.
11-15-2015, 04:47 AM
#9349
I guess I'm the only one who agrees went Bent. I started with 150k in my center diff, car felt really disconnected from input, both steering and throttle input. Went to 300k and it got better. Went back to the slipper and the car was a lot better.
I've done some tweaking on my car at my home track and the car is really good. I had a few guys drive my car and want the setup so I'm also posting it here. It should be good for higher bite clay. The car really does feel like a touring car in its the driving characteristics. http://forum.teamxray.com/xform/inde...setup=xb4_2016
I've done some tweaking on my car at my home track and the car is really good. I had a few guys drive my car and want the setup so I'm also posting it here. It should be good for higher bite clay. The car really does feel like a touring car in its the driving characteristics. http://forum.teamxray.com/xform/inde...setup=xb4_2016
11-15-2015, 08:12 AM
#9351
It was the kit set-up to a T . . . are you implying the kit set-up is that far off? The only change I made to the kit set-up was to go down to 100K and the car drove 100% better, in fact it was a dream to drive.
I drive my D413 on the exact same tracks with the exact same tires. Again, once I lowered the center diff oil to 100K, my XB4 drove on par with my D413 and they were both extremely consistent and fast.
I drive my D413 on the exact same tracks with the exact same tires. Again, once I lowered the center diff oil to 100K, my XB4 drove on par with my D413 and they were both extremely consistent and fast.
11-15-2015, 08:26 AM
#9352
And a stock slipper is closer to a center diff with 2mill cst oil
For helping out with setups ?
I have 15-20 people every single day on messenger, email, forums and through Facebook I help with setups.
I discuss the same exact issues over and over again……and if I where to have lengthy discussions on the exact same issues 20 times a day I would have to quit my day job
So I need to cut through and just get the info passed on.
This will also make it easier to find info later on instead of having it spread out over 50 pages of endless back and forth discussions.
But people are free to try out my suggestions or not.
And you're free to just ignore my posts or even block me……I can take it
The results and advice I'm passing on is from team members responsible for developing the very parts you're buying……and believe me…..between us we have tried every combination possible to find the best results
Bent
For helping out with setups ?
I have 15-20 people every single day on messenger, email, forums and through Facebook I help with setups.
I discuss the same exact issues over and over again……and if I where to have lengthy discussions on the exact same issues 20 times a day I would have to quit my day job
So I need to cut through and just get the info passed on.
This will also make it easier to find info later on instead of having it spread out over 50 pages of endless back and forth discussions.
But people are free to try out my suggestions or not.
And you're free to just ignore my posts or even block me……I can take it
The results and advice I'm passing on is from team members responsible for developing the very parts you're buying……and believe me…..between us we have tried every combination possible to find the best results
Bent
In my experience you are right. Higher center fluid or slipper is faster than lower weight. But like you said, if the setup is off then not so much. 100k is easy to drive, but not the fastest way around the track.
11-15-2015, 09:02 AM
#9354
I this loose enough for you ?
With 500' cst in the center diff
XB4 with 8' in the center diff is horrible……..unless you're going reeeaaaaallly slow that is
Bent
With 500' cst in the center diff
| + YouTube Video | |
XB4 with 8' in the center diff is horrible……..unless you're going reeeaaaaallly slow that is
Bent
8' would basically be like a front wheel drive car wouldn't it?
11-15-2015, 11:38 AM
#9355
I ran 100k in center diff but it got soft around 4 minute mark..went to 500k and love it ..but think i'm faster with slipper..Runing 13.5 small tight medium indoor track lap times 12.5 to 13.5 sec lap times..
11-15-2015, 01:26 PM
#9357
whats the difference with the new graphite arm is it strong or what and when we going to see parts in the us im going to have to use my xb4 13 front arms and hope they work ok
11-15-2015, 01:34 PM
#9358
Graphite arms are much stiffer (and more fragile) and are used for high grip carpet tracks.
Stock a-arms are readily available from Xray so if the US distributor is out of stock they should have them really soon.
Bent
11-15-2015, 01:46 PM
#9359
Took the time out of my day to measure the different track widths using the new Xray 12mm hex wheels with the Xray 12mm wheel hexes.
All measurement are done on the '16 XB4 using:
Width using stock 14mm wheel hexes and Xray V2 14mm wheels:
Width using 12mm wheel hexes and Xray 12mm wheels:
Front:
Rear:
Bent
All measurement are done on the '16 XB4 using:
- 20mm ride height (placed on Hudy 20mm droop blocks)
- 3 degree toe-in in the rear
- 1 degree toe-out in the front
- Hinge pin inserts in the middle position front and rear.
- Measured on the rear of the rear wheels (no tires)
- Measured on the front of the front wheels (no tires)
Width using stock 14mm wheel hexes and Xray V2 14mm wheels:
- Front: 245mm
- Rear: 245mm
Width using 12mm wheel hexes and Xray 12mm wheels:
Front:
- #365354 -0.75mm = 242mm
- #365353 0mm = 243,5mm
- #365355 +0.75mm (1 stripe) = 245mm
- #365356 +1.5mm (2 stripe) = 246,5mm
- #365357 +2.25mm (3 stripe) = 248mm
- #365355 +3.00mm (4 stripe) = Not enough threads on axle to secure the wheel nut.
Rear:
- #365353 0mm = 243mm
- #365355 +0.75mm (1 stripe) = 245mm
- #365356 +1.5mm (2 stripe) = 247mm
- #365357 +2.25mm (3 stripe) = 249mm
- #365355 +3.00mm (4 stripe) = 251mm
Bent
Bent