Xray XB4 thread
#6348
Tech Addict
iTrader: (12)
If you do screw the ballend all the way over the thread it may bind up the pivot ball in the ball end. Then the suspension will feel sluggish, very pack feel to it..
Sorry I cant help you on your spring play question. I run a 20mm ride height and have no spring play. I use 3dot fronts, 1dot rear. I still running saddles packs. More info required.
Front or rear?
What springs are you using?
What is the total length of the shock?
Sorry I cant help you on your spring play question. I run a 20mm ride height and have no spring play. I use 3dot fronts, 1dot rear. I still running saddles packs. More info required.
Front or rear?
What springs are you using?
What is the total length of the shock?
Both springs are a bit loose, stock springs so 3 dot front and 2 dot rear
lengths, from center of eyelets, are 75 and 88mm
Originally I had 1mm downstop shim in front and none in rear and left a little thread exposed on the ends per the basic clay setup, After I upped both downstops(2mm/1mm) and turned the ends on, the rear play was taken up, but still have about 1mm of slop on the spring in front when fully extended. I do have the large spindle bushing on bottom, so I may just swap it to the top, raising the spindles a bit, which would allow me to turn the collars down a bit to get the same ride height........
Last edited by kevinpratt823; 01-09-2015 at 01:28 PM.
#6349
Tech Addict
iTrader: (12)
With the lower weight of shorty, perhaps I need the softer springs as well. This would mean that I would have to run the collars down a bit farther to achieve the same ride height, and hence take up the "slack" when fully extended.......
Edit: I just swapped the bushings on the front spindles to put the spindles in the upper position(larger bushing on bottom side), this dropped the front end, so I had to go a few threads on the collars to get it back to 18mm, and now the springs do rest/press gently against the collars when shocks are fully extended. I'll run it like this tomorrow(for the first time), and see where I go from there. Also added 14g(for now) to the left front to compensate for the servo on the right a bit.
Last edited by kevinpratt823; 01-09-2015 at 01:33 PM.
#6352
Tech Fanatic
iTrader: (23)
Hi kevinpratt823
I'm glad you knew about the ballend thing. I see to many driver screwing them on too far and forgetting to see if the pivot ball still can move.
Ok so it's only a few mm of movement. What TV is saying is that the spring need to settle if they are brand new. I was coming from another angle, that you may have built something wrong, which it sounds like you haven't.
When I'm running a new car after it's first run, the ride height normally sags a few mm's. Mine can go from 20mm down to 17/18mm when running a new set of 1dot springs. Then I have re set the ride height, which means screwing the collars down a few more turn. I be honest, I have never notice the floating spring before. But I do set mine car to 20mm.
All good. You can always push your car up and down on the bench for 10min if you are bored. lol
I'm glad you knew about the ballend thing. I see to many driver screwing them on too far and forgetting to see if the pivot ball still can move.
Ok so it's only a few mm of movement. What TV is saying is that the spring need to settle if they are brand new. I was coming from another angle, that you may have built something wrong, which it sounds like you haven't.
When I'm running a new car after it's first run, the ride height normally sags a few mm's. Mine can go from 20mm down to 17/18mm when running a new set of 1dot springs. Then I have re set the ride height, which means screwing the collars down a few more turn. I be honest, I have never notice the floating spring before. But I do set mine car to 20mm.
All good. You can always push your car up and down on the bench for 10min if you are bored. lol
#6353
Tech Addict
iTrader: (12)
Hey guys just a quick question/concern .
First things first I have been into rc for many years and also competitive racing at my local tracks . I have had many cars before this XB4 and have bleed many shocks in my time . I love the Xray it is the best 4wd buggy I have ever had and raced with .
My question is no matter what I do and how I bleed the shocks there is always a squishy feeling right at the top of the shock when I compress the shock . I am building my shocks with zero rebound . I have gone through a few bottles of shock oil trying to get a nice shock . Is there something that I am missing to figuring out how to get rid of that squishy noise in the shock when its fully compressed or almost about to be fully compressed ?
If anybody knows please share
Thank you
First things first I have been into rc for many years and also competitive racing at my local tracks . I have had many cars before this XB4 and have bleed many shocks in my time . I love the Xray it is the best 4wd buggy I have ever had and raced with .
My question is no matter what I do and how I bleed the shocks there is always a squishy feeling right at the top of the shock when I compress the shock . I am building my shocks with zero rebound . I have gone through a few bottles of shock oil trying to get a nice shock . Is there something that I am missing to figuring out how to get rid of that squishy noise in the shock when its fully compressed or almost about to be fully compressed ?
If anybody knows please share
Thank you
Last edited by kevinpratt823; 01-09-2015 at 02:19 PM.
#6354
Tech Addict
iTrader: (12)
Ran the buggy today, felt pretty good. Broke a spindle and carrier though and the shop didn't have it. Trying to find some good aluminum ones and I don't see a ton out there, anybody know anything about this D-Hawk stuff? Is it just cheap Chinese crap?http://www.ebay.com/itm/like/1910918...466&rmvSB=true
#6355
Tech Addict
iTrader: (12)
Hi kevinpratt823
I'm glad you knew about the ballend thing. I see to many driver screwing them on too far and forgetting to see if the pivot ball still can move.
Ok so it's only a few mm of movement. What TV is saying is that the spring need to settle if they are brand new. I was coming from another angle, that you may have built something wrong, which it sounds like you haven't.
When I'm running a new car after it's first run, the ride height normally sags a few mm's. Mine can go from 20mm down to 17/18mm when running a new set of 1dot springs. Then I have re set the ride height, which means screwing the collars down a few more turn. I be honest, I have never notice the floating spring before. But I do set mine car to 20mm.
All good. You can always push your car up and down on the bench for 10min if you are bored. lol
I'm glad you knew about the ballend thing. I see to many driver screwing them on too far and forgetting to see if the pivot ball still can move.
Ok so it's only a few mm of movement. What TV is saying is that the spring need to settle if they are brand new. I was coming from another angle, that you may have built something wrong, which it sounds like you haven't.
When I'm running a new car after it's first run, the ride height normally sags a few mm's. Mine can go from 20mm down to 17/18mm when running a new set of 1dot springs. Then I have re set the ride height, which means screwing the collars down a few more turn. I be honest, I have never notice the floating spring before. But I do set mine car to 20mm.
All good. You can always push your car up and down on the bench for 10min if you are bored. lol
Thank you both for the feedback.
#6356
I've had an issue getting this buggy 14' to drive right, put about five packs through it with a 8.5 making minor changes and can't get the rear to stop washing out on every corner. Its almost like a 2wd and I've tried what had been suggested and i appreciate the help. So far I've tried loosening the slipper and run the motor and esc with no timing advance, still not working for me. It's currently the clay stock setup with the correct tires. The rear has almost no droop and the front has tons. Something isn't adding up to me. I took the motor and esc out to try a different setup to only find out the outdrives on the slipper are already notched. I've never seen outdrives notch so quickly with such little drive time. Any suggestions?
#6357
Tech Addict
iTrader: (12)
Somebody suggested I post some pictures to make this more clear, here it is.
In reviewing and typing this, I noticed that the basic clay setup I was going by also specified 2-dot fr/1-dot rear springs, this would make up the difference, as the softer springs would have to be compressed farther down with the collars to achieve the same ride height, and they would thus return fully with the stroke of the shock and maintain tension on the collar.
Notice in the basic clay setup, it says to put the larger spindle bushings "down", this effectively lowers the spindle on the carrier, and as a side effect less preload is required to achieve a desired ride height, which is 18mm according to sheet. The basic instructions lean you more towards assembling it with the bushing in the up position in the left picture but shows both options on the right, so I'm curious if anybody is running it in the down position as I tried to.
The same sheet specifies 1mm downstop shim in front, 0mm in rear. The instructions tell you to screw the shock ends on leaving 1-1.5mm of thread exposed. Now, with all of these things done, you are left with a shock that can extend pretty far, and the geometry of the car in a way that the shock shafts to be slightly more compressed to achieve the same ride height as it would if the bushing was on top.
Now, when backing the collars off enough to achieve that low ride height of 18mm with the stiffer kit springs, they end up pretty close to the top when the car is sitting. Now when the car comes off the ground, the arms drop, the shocks extend fully, (maybe even needing a little assistance from gravity at the end), and by the time the spring fully expands there is still a few mm of out-travel left in the shock. The result was the gap between the top of the spring and the shock collar, and it left the spring floating loosely over the body, with no remaining tension.
If you all built the kit with more than 1mm/0mm downstop(limiting the extension of shaft), or with the larger spindle bushing on the topside of the carrier, with softer springs, or a higher ride height(all requiring more spring/collar preload), it would have given/taken enough to make the difference and the spring would remain slightly compressed under full extension.
The moral of the story I guess is that you cannot build the car to the basic clay setup with the springs that come with it. You either have to get softer springs, or make compromises with downstop, spindle bushings(roll center), or higher ride height. I hope I didn't cause confusion or clutter the thread with this, but I figured somebody else is bound to encounter it and maybe it will help.
In reviewing and typing this, I noticed that the basic clay setup I was going by also specified 2-dot fr/1-dot rear springs, this would make up the difference, as the softer springs would have to be compressed farther down with the collars to achieve the same ride height, and they would thus return fully with the stroke of the shock and maintain tension on the collar.
Notice in the basic clay setup, it says to put the larger spindle bushings "down", this effectively lowers the spindle on the carrier, and as a side effect less preload is required to achieve a desired ride height, which is 18mm according to sheet. The basic instructions lean you more towards assembling it with the bushing in the up position in the left picture but shows both options on the right, so I'm curious if anybody is running it in the down position as I tried to.
The same sheet specifies 1mm downstop shim in front, 0mm in rear. The instructions tell you to screw the shock ends on leaving 1-1.5mm of thread exposed. Now, with all of these things done, you are left with a shock that can extend pretty far, and the geometry of the car in a way that the shock shafts to be slightly more compressed to achieve the same ride height as it would if the bushing was on top.
Now, when backing the collars off enough to achieve that low ride height of 18mm with the stiffer kit springs, they end up pretty close to the top when the car is sitting. Now when the car comes off the ground, the arms drop, the shocks extend fully, (maybe even needing a little assistance from gravity at the end), and by the time the spring fully expands there is still a few mm of out-travel left in the shock. The result was the gap between the top of the spring and the shock collar, and it left the spring floating loosely over the body, with no remaining tension.
If you all built the kit with more than 1mm/0mm downstop(limiting the extension of shaft), or with the larger spindle bushing on the topside of the carrier, with softer springs, or a higher ride height(all requiring more spring/collar preload), it would have given/taken enough to make the difference and the spring would remain slightly compressed under full extension.
The moral of the story I guess is that you cannot build the car to the basic clay setup with the springs that come with it. You either have to get softer springs, or make compromises with downstop, spindle bushings(roll center), or higher ride height. I hope I didn't cause confusion or clutter the thread with this, but I figured somebody else is bound to encounter it and maybe it will help.
#6358
Tech Addict
iTrader: (28)
Ran the buggy today, felt pretty good. Broke a spindle and carrier though and the shop didn't have it. Trying to find some good aluminum ones and I don't see a ton out there, anybody know anything about this D-Hawk stuff? Is it just cheap Chinese crap?http://www.ebay.com/itm/like/1910918...466&rmvSB=true
4 arms, 2 pins, ring and pinions and a rear bulkhead.
#6359
Tech Addict
iTrader: (12)
The kicker is that I had bought spare pins and arms and had those in my bag, but no spindles/carriers because it didn't sound like many broke them. Maybe just a freak thing.
#6360
Tech Prophet
iTrader: (84)
Ran the buggy today, felt pretty good. Broke a spindle and carrier though and the shop didn't have it. Trying to find some good aluminum ones and I don't see a ton out there, anybody know anything about this D-Hawk stuff? Is it just cheap Chinese crap?http://www.ebay.com/itm/like/1910918...466&rmvSB=true