246LikesXray XB4 thread
09-03-2014, 03:21 PM
#5476
lol, I am not trying to troll you. I run on high bite. So wheel spin will be minimal. We currently run clay slicks with no sauce. And I know that the center gear diff transfers power front to back. But unless the slipper is decoupled like the sc10 4x4, it is not really like a center diff. Tekno came out with a slipperential a while back. Seemed like a good idea to save the drive terrain and provide power transfer from the front and rear wheels. But the idea never caught on. My thinking is that the center diff on high bite will heighten the issues with the ring/pinion. I suspect the ring/pinion gear issues are much less on lower bite tracks. I recently moved from low bite tracks to high bite, and the wear and tear on my drive terrain has greatly increased. All that I am getting at is...The steel ring and pinion might make for great option parts, if they are release at the same time as the 2015 car. Just like the slipper vs center diff is an option, stronger ring and pinion gears should be an option as well. The cactus classic has a 13.5 4wd buggy class. And I am sure the lighter ring/pinion gears will be wanted. Plus a 13.5 is not overly powerful and probably wont blow them up. But a 6.5 on high bite will be more likely to. But blaming the drivers for not having the right slipper setting, for blown gears, is a little on the weak side. IMO, the slipper setting arguments are just a band-aid fix.
Just today we did another 5 hours of practicing with the aim of working on setup and increasingly up the speed…..and this was on high bite astro with Schumacher Mini Spike tires.
And again……NO problems….no broken parts……..and yes she was once again the fastest car out here.
It's not a band aid……it's an essential part of the setup process…….always has been and always will be.
When running the center diff in the XB4 we remove the slipper completely.
There's no slipper when running a center diff.
And yes I've raced the SC10 4x4 myself…….also with the center diff and the garodiscs……..this was the car Malin started her R/C racing with
Bent
09-03-2014, 03:28 PM
#5477
I would hate to see you guys with diff/slipper dyslexia problems running a 4wd model that uses ball diffs 
. I had umpteen B44 models before my XB4s, and if you over-tightened that slipper even a little, you'd shred a ball diff within the first 3 hot laps, especially when you land a jump on power. I run on a high bite clay track where we use slicks in the winter as well. I agree that high bite wears on a drive-train twice as fast as loose. I know when we run mod 2wd buggy, I'm rebuilding my ball diff once per month. Despite this, I still have yet to destroy my XB4 gears after a full season of racing every weekend.
. I had umpteen B44 models before my XB4s, and if you over-tightened that slipper even a little, you'd shred a ball diff within the first 3 hot laps, especially when you land a jump on power. I run on a high bite clay track where we use slicks in the winter as well. I agree that high bite wears on a drive-train twice as fast as loose. I know when we run mod 2wd buggy, I'm rebuilding my ball diff once per month. Despite this, I still have yet to destroy my XB4 gears after a full season of racing every weekend.
Most of them wouldn't be able to make a single lap………….then they WOULD have to learn
fanboi fanboi fanboi fanboi!!! hahaha I couldn't help it
I adjust my slippers all the time due to all the surfaces I race on. Plus the change of track conditions is a huge factor. I just watched the video and I learned something new about the car being to squirly from the down sides. Thank you Bent for posting.
I have 2 xb4's and 1 xb4/2... and if my son who races his in novice has zero issues other than breaking wing mounts and wings I think im doing something right
I adjust my slippers all the time due to all the surfaces I race on. Plus the change of track conditions is a huge factor. I just watched the video and I learned something new about the car being to squirly from the down sides. Thank you Bent for posting.
I have 2 xb4's and 1 xb4/2... and if my son who races his in novice has zero issues other than breaking wing mounts and wings I think im doing something right
I get questions and comments about how smooth Malin jumps and drives all the time and not taking anything away from her but a properly setup car that don't have a suspension or drivetrain that binds up on landing is key to get those perfect landings and being able to get on throttle earlier and harder
Sounds like you and your son are enjoying your Xray's
And you're very welcome
Bent
09-03-2014, 03:40 PM
#5478
Here's an example of the setup we used for the Swedish National Championship a couple of weeks ago.
Very high bite astro turf with Schumacher Mini Spike tires and CENTER DIFF with composite gears and 1.000.000 cst diff grease !!!
Front and rear diffs had 8000 cst oil and all stock gears and shimming.
No issues what so ever
Bent
Very high bite astro turf with Schumacher Mini Spike tires and CENTER DIFF with composite gears and 1.000.000 cst diff grease !!!
Front and rear diffs had 8000 cst oil and all stock gears and shimming.
No issues what so ever
Bent
09-03-2014, 04:09 PM
#5479
Tech Fanatic
iTrader: (23)
Bent you got to take in consideration that tracks are different here in the US then over there. I can say that my slipper is set 100% right and have tried 2 different setting having both of them blow the gears. I will say that i have found it happen at some tracks and NOT at others. what I have found is that it seems to happen at tracks that have a Fine Sand (like beach sand) and that it works its way into the diff case. now I dont just check the slipper but I open the diff case up and blow it out so that there isnt any real find sand in it. not trying to start a agreement but maybe from what I have seen is that the tracks surface might be a factor that no one has talked about yet. Ever time I have had a gear go bad it has been at the same 2 tracks while at the other 3 to 4 tracks I have had 0 issues. also when they do go bad there has always been a sand/plastic/grease compound in the diff. I hope this helps.
When you say sand in the diff, do you mean inside the diff (mixed with the diff oil) or do you mean in the rear/front bulkhead (sand over the diff and bevel gear)?
09-03-2014, 04:17 PM
#5480
09-03-2014, 07:09 PM
#5482
Tech Regular
shorty conversion
i was able to get some test time on my shorty conversion , i was a little nervous because because i really enjoyed my xb4, and I've raced sx3 , b44.1, b44.2 and my xb4 would run 1 sec a lap time faster consistently . but i couldn't believe it but the shorty conversion is even better, even more predictable and one of the best things about the car handling was when I'm pushing the car hard and it would get upset or a little out of shape , i could bring it wright back instead of the weight keep going in the wrong direction. the car was even more predictable and it was fine before , and lighter would jump better. really looking forward to racing it this friday , i race indoor clay it was worth the work.
09-03-2014, 08:09 PM
#5483
i was able to get some test time on my shorty conversion , i was a little nervous because because i really enjoyed my xb4, and I've raced sx3 , b44.1, b44.2 and my xb4 would run 1 sec a lap time faster consistently . but i couldn't believe it but the shorty conversion is even better, even more predictable and one of the best things about the car handling was when I'm pushing the car hard and it would get upset or a little out of shape , i could bring it wright back instead of the weight keep going in the wrong direction. the car was even more predictable and it was fine before , and lighter would jump better. really looking forward to racing it this friday , i race indoor clay it was worth the work.
09-04-2014, 05:00 AM
#5484
Tech Master
iTrader: (77)
i was able to get some test time on my shorty conversion , i was a little nervous because because i really enjoyed my xb4, and I've raced sx3 , b44.1, b44.2 and my xb4 would run 1 sec a lap time faster consistently . but i couldn't believe it but the shorty conversion is even better, even more predictable and one of the best things about the car handling was when I'm pushing the car hard and it would get upset or a little out of shape , i could bring it wright back instead of the weight keep going in the wrong direction. the car was even more predictable and it was fine before , and lighter would jump better. really looking forward to racing it this friday , i race indoor clay it was worth the work.
09-04-2014, 06:57 AM
#5485
Here you go:
And for every time some of the guys here start whining about setting your slipper correctly being a "fanboi" comment I will post this as a response
Bent
| + YouTube Video | |
And for every time some of the guys here start whining about setting your slipper correctly being a "fanboi" comment I will post this as a response
Bent
Did they change the chassis on the XB4? Mine does not look the same as the one I had earlier in the year. No speed control to battery wire hold downs anymore. Confused...
09-04-2014, 08:02 AM
#5486
Tech Initiate
A brand new one I bought in july had the same thing, they must've made a rolling update somewhere along the lines.
09-04-2014, 08:20 AM
#5487
Tech Addict
iTrader: (11)
to be honest Im not all that mad about them blowing here and there because face it, Shic happens, but when a company says COMING SOON and its been almost a year, something is wrong there...
09-04-2014, 04:45 PM
#5489
Tech Fanatic
iTrader: (23)
I mean in the Rear bulkhead, Also a key point I forgot to point out is I have NEVER, not even once blown a front Bevel Gear or Composite, it always seems to be the rear when it does go. I also run a Vst2 5.5t motor on big air tracks so I do know some of the broken gears could be from me getting on it alittle early. but for me it seems to blow at the tracks with sand like dirt in the compound. I also always change both gears when 1 goes bad, Just something I learned from 1/8 about them being broken in together.
to be honest Im not all that mad about them blowing here and there because face it, Shic happens, but when a company says COMING SOON and its been almost a year, something is wrong there...
to be honest Im not all that mad about them blowing here and there because face it, Shic happens, but when a company says COMING SOON and its been almost a year, something is wrong there...
5.5t.....monster power. This may be the reason behind the rear one failing. The rear failing is normally causes from motor power (and other things
) and the front will fail if your breaks are set to high or if you are one of those driver that thinks by keeping the throttle open will help there car in clearing the triples that you are about to fall short on. Check your slipper....
Our track surface is clay brick dust and I also have dust in my bulkheads. Yes, it will prematurely wear the gears out, but this has never cause my diff gears to fail. I don't change them that often. I normally replace my cars every 6months. It enters the case from the two hole in the chassis. From the screws that hold the bulkheads together. You can put a drop of silicone sealant to completely seal it (inside the bulkhead).
A quote from another driver in this thread.
"If one breaks alloy caster blocks with plastic spindles , what do you think is gna happen when you install alloy spindles?
Sumn's gna give!!!"
09-04-2014, 08:37 PM
#5490
Tech Regular
Yeah, I want a detailed explanation of how you did this. In flipping the full length top deck, you had to move the center diff toward the front of the car. And I would assume you had to do some serious dremeling to remove the plastic from the chassis where the saddle packs rest as well as perhaps that small square in the center where the back of the diff cradle mounts normally. Did you have to drill custom holes in the chassis when you flipped the motor mount as well as custom holes and stand-offs for the plastic part of the diff holder?