Like Tree233Likes

XRAY T4'19 SPEC

Reply

Old 05-03-2019, 05:28 AM
  #481  
Tech Apprentice
 
Join Date: Feb 2005
Posts: 56
Default

Originally Posted by R Dodge View Post


okay, that shouldnít be happening. Check to make sure there is nothing binding or interfering with the belt in any way. Iím not sure what else to tell you. The kit belts have been good consistently over the years. But this is for sure unusual.
For now I ordered a full set of black belts for spare and another front belt to fix the issue. I know during my initial assembly the belt wanted to twist a little around it's midsection when it was idle.

And before driving I had to trim the servo mount grommets as the rubber was sticking out where the belt was and it was pushing the belt out a little. I made sure to watch for interference across the belt when revving it off the ground and I did notice the belt just didn't seem smooth at high rpms, like there was a lot of belt vibration at the midsection of the belt, but I assumed that was due to low belt tension.

OT: it is amazing how easy maintenance is on the car. The only other hobby grade 1/10 on road car I've had was an HPI Nitro RS4 2 (fully upgraded, still have it) and it took no time at all to pull the diff and belt assembly off the T4, compared to the RS4 I would have to remove half the front of the car to get to the diff and front belt. I thought about running it again, but since parts as gone and Xray being well and alive I may just permanently retire it and get an NT1 for my onroad nitro fix if maintenance is going to be simple on that as well.
InTheZoneAC is offline  
Reply With Quote
Old 05-03-2019, 06:35 AM
  #482  
Tech Master
iTrader: (22)
 
Join Date: Feb 2012
Posts: 1,428
Trader Rating: 22 (100%+)
Default

Be sure your front spool has the side piece on and secure. This is assembled when building the kit.

Also, check to be sure that the top deck isn't cracked or that you have too much flex in the car. The only time I've had a front belt come off was the result of a hard hit that cracked the top deck allowing the car to flex front to rear too much.
mooby64 likes this.
Troy Carter is offline  
Reply With Quote
Old 05-04-2019, 08:03 AM
  #483  
Tech Apprentice
 
Join Date: Feb 2005
Posts: 56
Default

Originally Posted by Troy Carter View Post
Be sure your front spool has the side piece on and secure. This is assembled when building the kit.

Also, check to be sure that the top deck isn't cracked or that you have too much flex in the car. The only time I've had a front belt come off was the result of a hard hit that cracked the top deck allowing the car to flex front to rear too much.
-When you say side piece are you talking about the ring that attaches to the spool to give the belt two sidewalls to rest inside? The front spool has been properly assembled, the flat parts are facing the belt and the bulge of the ring is on the outside.
-The hubs are locked into the bulkhead supports otherwise I wouldn't be able to fit the spool down in place.
-The upper plate is fine, although one end seems flimsy since it's a split design, but that's normal.

There's still some servo mount material (the servo screw with rubber grommet) sticking out about .5mm-1mm from the aluminum brace. I already trimmed the rubber away since it was sticking out a lot more and was pressing against the belt initially, but are tolerances so tight around the belt that it would rub the aluminum servo mount even without a servo installed? I still am thinking the belt itself was one part of the issue since it didn't lay flat. There was always a part of it that wanted to twist. I know it's thin, but still.
InTheZoneAC is offline  
Reply With Quote
Old 05-04-2019, 06:18 PM
  #484  
Tech Addict
iTrader: (4)
 
Join Date: Dec 2015
Location: San Jose CA
Posts: 606
Trader Rating: 4 (100%+)
Default

Originally Posted by InTheZoneAC View Post
-When you say side piece are you talking about the ring that attaches to the spool to give the belt two sidewalls to rest inside? The front spool has been properly assembled, the flat parts are facing the belt and the bulge of the ring is on the outside.
-The hubs are locked into the bulkhead supports otherwise I wouldn't be able to fit the spool down in place.
-The upper plate is fine, although one end seems flimsy since it's a split design, but that's normal.

There's still some servo mount material (the servo screw with rubber grommet) sticking out about .5mm-1mm from the aluminum brace. I already trimmed the rubber away since it was sticking out a lot more and was pressing against the belt initially, but are tolerances so tight around the belt that it would rub the aluminum servo mount even without a servo installed? I still am thinking the belt itself was one part of the issue since it didn't lay flat. There was always a part of it that wanted to twist. I know it's thin, but still.
Nobody uses the rubber grommets on the servo for electric cars. Not sure about nitro, but I doubt it.
belewis01 is offline  
Reply With Quote
Old 05-06-2019, 03:03 AM
  #485  
Suspended
iTrader: (13)
 
Lonestar's Avatar
 
Join Date: Oct 2001
Location: Switzerland
Posts: 2,547
Trader Rating: 13 (100%+)
Default

Originally Posted by R Dodge View Post


Xray introduced this at 2016 worlds. I donít think anyone else had it at the time, but it definitely has become a common tuning option these days. There are also now many other variations of it but it seems Xray feels the carbon brace is best and I agree it is very good. It reduces overall flex with the main benefit seeming to be increased forward traction. It does reduce the feel of steering mid corner which can improve corner speed, but definitely improves forward drive
Robby,

thanks for this. I'm still confused with this center brace... and I'm not good enough a driver to make sure I "feel" the change in a consistent manner.

For 13.5 boosted, on a low-medium grip fast asphalt track, what would you recommend as the "base" configuration for this center brace and/or shimming the top-deck?

Thank you

Paul
Lonestar is offline  
Reply With Quote
Old 05-06-2019, 07:27 AM
  #486  
Tech Elite
 
R Dodge's Avatar
 
Join Date: Jul 2008
Posts: 2,768
Default

Originally Posted by Lonestar View Post
Robby,

thanks for this. I'm still confused with this center brace... and I'm not good enough a driver to make sure I "feel" the change in a consistent manner.

For 13.5 boosted, on a low-medium grip fast asphalt track, what would you recommend as the "base" configuration for this center brace and/or shimming the top-deck?

Thank you

Paul
I would recommend going with 6mm shims under the carbon brace. That seems to be pretty common on the Euro asphalt setups. I never tried 6mm until last season when I copied Alex's pre-worlds setup and I liked it. I also ran the 2.0mm topdeck raised 1mm per Alex's setup.
Lonestar likes this.
R Dodge is offline  
Reply With Quote
Old 05-06-2019, 09:01 AM
  #487  
Suspended
iTrader: (13)
 
Lonestar's Avatar
 
Join Date: Oct 2001
Location: Switzerland
Posts: 2,547
Trader Rating: 13 (100%+)
Default

Originally Posted by R Dodge View Post
I would recommend going with 6mm shims under the carbon brace. That seems to be pretty common on the Euro asphalt setups. I never tried 6mm until last season when I copied Alex's pre-worlds setup and I liked it. I also ran the 2.0mm topdeck raised 1mm per Alex's setup.
Thank you... will try this saturday raceday then
Lonestar is offline  
Reply With Quote
Old 05-06-2019, 02:28 PM
  #488  
Suspended
iTrader: (13)
 
Lonestar's Avatar
 
Join Date: Oct 2001
Location: Switzerland
Posts: 2,547
Trader Rating: 13 (100%+)
Default


Guys, what an I doing wrong?!? I used an older part which I had filed a bit... And even when it just doesn't fit... It rubs the belt
​​unambiguously...

Thanks!
paul

6mm shims
Lonestar is offline  
Reply With Quote
Old 05-07-2019, 04:44 AM
  #489  
Tech Elite
 
R Dodge's Avatar
 
Join Date: Jul 2008
Posts: 2,768
Default

Hey Paul,

I am actually converting my car to asphalt now so I just went to 6mm under my center brace last night. I did not notice anything like this when I did this but I'll have to look at it when I get home tonight.
Lonestar likes this.
R Dodge is offline  
Reply With Quote
Old 05-07-2019, 09:05 AM
  #490  
Tech Fanatic
 
daleburr's Avatar
 
Join Date: May 2010
Location: Oxfordshire, UK
Posts: 954
Default

The front belt rubs on the carbon brace, servo mount, lower servo ear, upper side of the top-deck, and underside of the steering ball-joints. All my cars are like that. Don't worry about it.
Lonestar likes this.
daleburr is offline  
Reply With Quote
Old 05-08-2019, 07:36 AM
  #491  
Suspended
iTrader: (13)
 
Lonestar's Avatar
 
Join Date: Oct 2001
Location: Switzerland
Posts: 2,547
Trader Rating: 13 (100%+)
Default

Originally Posted by R Dodge View Post
Hey Paul,

I am actually converting my car to asphalt now so I just went to 6mm under my center brace last night. I did not notice anything like this when I did this but I'll have to look at it when I get home tonight.
Thanks - curious to see if yours is any different... as the holes in the chassis are where they are, I can only think about the belt being installed more to the right side if yours clears it...

Originally Posted by daleburr View Post
The front belt rubs on the carbon brace, servo mount, lower servo ear, upper side of the top-deck, and underside of the steering ball-joints. All my cars are like that. Don't worry about it.
Thanks. Mine rubs on the lower center servo washer, very true - I had filed this too not on the steering ball joints, prob as I'm running the diffs low. I guess I will buy a spare belt just in case

Cheers both!

Paul
Lonestar is offline  
Reply With Quote
Old 05-08-2019, 08:01 AM
  #492  
Tech Elite
 
R Dodge's Avatar
 
Join Date: Jul 2008
Posts: 2,768
Default

Ah, sorry I totally forgot to get that pic last night. I will do that today.
R Dodge is offline  
Reply With Quote
Old 05-08-2019, 11:53 AM
  #493  
Tech Elite
iTrader: (95)
 
Josh-n-ya's Avatar
 
Join Date: May 2011
Location: Alameda, CA
Posts: 2,839
Trader Rating: 95 (100%+)
Default

Who has tried the Rcmaker floating electronics side plate? I got one and havenít tried it yet. I noticed it stiffened up center of chassis a bit when I mounted it. I wonder if I can get away with not using the center CF chassis stiffener. I will try Saturday. Weíll see
Josh-n-ya is offline  
Reply With Quote
Old 05-08-2019, 02:14 PM
  #494  
Tech Elite
 
R Dodge's Avatar
 
Join Date: Jul 2008
Posts: 2,768
Default


Originally Posted by Lonestar View Post
Thanks - curious to see if yours is any different... as the holes in the chassis are where they are, I can only think about the belt being installed more to the right side if yours clears it...



Thanks. Mine rubs on the lower center servo washer, very true - I had filed this too not on the steering ball joints, prob as I'm running the diffs low. I guess I will buy a spare belt just in case

Cheers both!

Paul
here is my belt at the center brace. Definitely looks like I have a little more clearance than you do but itís still gonna rub. I donít stress about it.


R Dodge is offline  
Reply With Quote
Old 05-08-2019, 02:33 PM
  #495  
R/C Tech Elite Member
 
JayL's Avatar
 
Join Date: Mar 2006
Location: Ca
Posts: 3,060
Default

Originally Posted by Josh-n-ya View Post
Who has tried the Rcmaker floating electronics side plate? I got one and havenít tried it yet. I noticed it stiffened up center of chassis a bit when I mounted it. I wonder if I can get away with not using the center CF chassis stiffener. I will try Saturday. Weíll see
I know someone who RAN it....
JayL is offline  
Reply With Quote

Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service