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Old 03-17-2017, 02:10 AM   -   Wikipost
R/C Tech Forums Thread Wiki: Xray T4 2016
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Welcome to the XRAY T4'16 Thread & Wikipost! Here you will find some useful info, tips and tricks as well as setups that are used by several team drivers. This wikipost is a work in progress and should continue to develop over time.

Tips & Tricks:

Alex Hagberg's Tech Tip Tuesday articles

How to mount your Protoform LTC-R Body
Setting static camber
How to mount weight on your chassis Part1
How to mount the rear wing on Protoform bodies
Simple troubleshooting guide
How to mount the battery on your chassis
How to glue your front tires for CRC Black carpet with Eric Anderson
Utilizing Exponential and RMode on the M12S
How to mount weight on your chassis Part2

Team driver Tim Wahl posted some very useful tips on Facebook as he worked through building a new kit.

1- Carbon Parts
2-Suspension
3-Solid Axle and Differential
4-Bulkheads & Drivetrain
5-Driveshaft (ECS & CVD)
6-Front & Rear Suspension
7-Tweak
8-Anti-Roll Bar
9-Battery Fix (OPTIONAL)
10-Bumper & Body
11-Shocks
12-Steering

New Graphite Hubs:
Xray have recently released some additional Graphite hubs for the T4 lineup. The 4° Graphite C-Hub has been out for some time and is known to improve steering on entry, and in general makes the car turn better. This has been the go-to c-hub on asphalt for many on the Xray team, though it is not needed on high bite carpet. The Graphite rear hub tends to make the car more stable, especially on corner entry. We are still working on gathering input on the new Graphite steering block, but for the moment feel that it should improve steering response. All Graphite parts are approximately 1g lighter than the Hard or Medium options.

Option Parts to consider:
XRA301196 T4 Graphite Upper Deck 1.6mm V2
XRA301226 Foam Bumper – Hard - highly recommend
XRA302165 Composite Front Suspension Arm 2-Hole – Hard
XRA302169 Composite Front Suspension Arm 1-Hole – Graphite
XRA302803 1.3mm Front Anti-Roll Bar
XRA303169 Composite Rear Suspension Arm 1-Hole – Graphite
XRA303802 1.2mm Rear Anti-Roll Bar
XRA305137 Steel Solid Axle Driveshaft Adapters - HUDY Spring Steel - highly recommend
XRA305242 Composite Drive Shaft Replacement Cap 3.5mm – Orange – Strong (QTY 4)
XRA305351 Aluminum Wheel Hub – Offset “-0.75mm” – Black (QTY 2)
XRA306191 T4 Graphite + Aluminum Fully Adjustable Battery Holder
XRA308264 4S Spring-Set Progressive C=2.5-2.8 (QTY 2)
XRA308276 4S Spring-Set C=2.7 (QTY 2)
XRA308286 4S Spring-Set C=2.6 (QTY 2)
Specific to Asphalt:
XRA302383 Composite C-Hub Right – 4* - Graphite (ECS)
XRA302384 Composite C-Hub Left – 4* - Graphite (ECS)
XRA308039 Aluminum Progressive Shock System – Set (QTY 2)

Specific to Carpet:

XRA301141 T4 Aluminum Flex Chassis 2mm
XRA302375 Composite C-Hub Right – 6* - Hard ***Modification may be required if they don't have the "ECS" stamp.

XRA302376 Composite C-Hub Left – 6* - Hard ***Modification may be required if they don't have the "ECS" stamp.

XRA303711-O Aluminum Rear Lower Suspension Holder – Front – RF
Recent Setups:
3 July 2016 - Alex Hagberg - European Championship - Asphalt - Mod - 2nd
3 July 2016 - Bruno Coelho - European Championship - Asphalt - Mod - 4th
3 July 2016 - Jan Ratheisky - European Championship - Asphalt - 13.5 - TQ + Win

29 June 2016 - Max Kuenning - Reedy - Asphalt - Mod - 4th
29 June 2016 - Keith Yu - Reedy - Asphalt - 13.5 - TQ + 2nd
29 June 2016 - Eric Anderson - Reedy - Asphalt - 13.5 - 3rd

15 May 2016 - Bruno Coelho - ETS Rd 4 Riccione - Asphalt - Mod - TQ + Win
15 May 2016 - Mattia Collina - ETS Rd 4 Riccione - Asphalt - 13.5 - Win

17 April 2016 - Max Kuenning - MHIC - Carpet - Mod - 4th

10 April 2016 - Bruno Coelho - ETS Rd 3 Wels - Carpet - Mod - 2nd
10 April 2016 - Alex Hagberg - ETS Rd 3 Wels - Carpet - Mod - 4th
10 April 2016 - Jan Ratheisky - ETS Rd 3 Wels - Carpet - 13.5 - TQ + Win

22 March 2016 - Paul LeMieux - Canadian Nats - Carpet - Mod - TQ + Win
22 March 2016 - Luke Pittman - Canadian Nats - Carpet - Mod - 3rd

6 March 2016 - Chris Adams - ROAR Nats - Carpet - Mod - TQ + Win
6 March 2016 - Craig Xavier - ROAR Nats - Carpet - 17.5 - 4th
6 March 2016 - Eric Anderson - ROAR Nats - Carpet - 17.5 - 5th

6 February 2016 - Bruno Coelho - ETS Rd 2 Koblenz - Carpet - Mod - TQ + Win
6 February 2016 - Alex Hagberg - ETS Rd 2 Koblenz - Carpet - Mod - 2nd

31 January 2016 - Alex Hagberg - Snowbirds - Carpet - Mod - TQ + Win
31 January 2016 - Jan Ratheisky - Snowbirds - Carpet - All - See Comments
31 January 2016 - Drew Ellis - Snowbirds - Carpet - 13.5 - 4th
31 January 2016 - Robbie Dodge - Snowbirds - Carpet - 17.5 - Win

13 December 2015 - Bruno Coelho - ETS Rd 1 Hrotovice - Carpet - Mod - 3rd
13 December 2015 - Alex Hagberg - ETS Rd 1 Hrotovice - Carpet - Mod - 4th
13 December 2015 - Olly Jeffries - ETS Rd 1 Hrotovice - Carpet - Mod - 7th
13 December 2015 - Jan Ratheisky - ETS Rd 1 Hrotovice - Carpet - 13.5 - TQ + Win

29 November 2015 - Paul LeMieux - US Indoor Champs - Carpet - Mod - TQ + Win

25 October 2015 - Eric Anderson - Stock Wars - Carpet - 17.5 - 2nd

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Old 02-05-2016, 11:40 AM   #451
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On my T416 I'm using the avid chassis on carpet. I recently acquired a team tamale chassis with one of my 14's. My question is - is the team tamale typically used on carpet or asphalt? It seems to have good flex characteristics but visually not as much as the avid. Thinking about putting the TT chassis on my USGT car.

Thoughts?
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Old 02-05-2016, 01:19 PM   #452
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Quote:
Originally Posted by dcarroll View Post
On my T416 I'm using the avid chassis on carpet. I recently acquired a team tamale chassis with one of my 14's. My question is - is the team tamale typically used on carpet or asphalt? It seems to have good flex characteristics but visually not as much as the avid. Thinking about putting the TT chassis on my USGT car.

Thoughts?
The TT chassis is quite stiff compared to the Avid in my experience. I'm mostly a carpet guy so I can't speak for asphalt. I liked it in Stock classes, but in Mod it made the car feel very numb and somewhat unresponsive. For your purpose it should be fine. Just make sure it's straight. I've seen a lot of those bend.

I do know of one guy who ran a TT chassis on asphalt at last years' Timezone Grand Prix and he loved it. So there's that too.
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Old 02-05-2016, 01:31 PM   #453
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Makes sense Danny. I appreciate the info. I'll try it out soon then. The chassis is in good shape and appears to be flat when I lay it on a thick piece of glass.
Our carpet track is pretty small, 17.5 in anything is more than enough power, and located close to the indoor dirt track and picks up some dust, and almost always feels like a 'green' track. So we're usually trying to dial in more chassis flex and traction.

I'll run it as is, do some tweaks, note lap times and feelings, then swap it out for the TT and see how it compares for me.
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Old 02-06-2016, 09:01 AM   #454
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Which shock piston to use for medium - high carpet? Which thickness to use?
I couldn't find anything about it on menu, it just shows you have a few options.
and there wasn't any tuning tips.
Could anyone share your experience?

Edit: this is for user manual base setup.
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Old 02-06-2016, 03:02 PM   #455
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Quote:
Originally Posted by yifuqiao View Post
Which shock piston to use for medium - high carpet? Which thickness to use?
I couldn't find anything about it on menu, it just shows you have a few options.
and there wasn't any tuning tips.
Could anyone share your experience?

Edit: this is for user manual base setup.
4x1.1. Bin the rest, they are never used.
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Old 02-07-2016, 02:17 PM   #456
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Can someone tell me how to read the wheelbase setting on this setup sheet please? I'm a little confused as to where the X's place the spacers.
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Old 02-07-2016, 10:49 PM   #457
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Originally Posted by xrider View Post
Can someone tell me how to read the wheelbase setting on this setup sheet please? I'm a little confused as to where the X's place the spacers.
I had some trouble with this myself but if you look closely the arrows point to the front of the arm. So the x mark the shims in front of the arm, either 0, 1 or 2. The rest goes to the back. In this particular case the whole wheelbase is shifted back by 1 mm.
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Old 02-08-2016, 05:23 AM   #458
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Quote:
Originally Posted by dcarroll View Post
Makes sense Danny. I appreciate the info. I'll try it out soon then. The chassis is in good shape and appears to be flat when I lay it on a thick piece of glass.
Our carpet track is pretty small, 17.5 in anything is more than enough power, and located close to the indoor dirt track and picks up some dust, and almost always feels like a 'green' track. So we're usually trying to dial in more chassis flex and traction.

I'll run it as is, do some tweaks, note lap times and feelings, then swap it out for the TT and see how it compares for me.
If your track is dusty and feels green all of the time, it's more likely that the CF chassis produces the best result for you. The thinner 1.6mm top deck may even be useful in that situation.
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Old 02-08-2016, 06:50 PM   #459
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Quote:
Originally Posted by dcarroll View Post
Makes sense Danny. I appreciate the info. I'll try it out soon then. The chassis is in good shape and appears to be flat when I lay it on a thick piece of glass.
Our carpet track is pretty small, 17.5 in anything is more than enough power, and located close to the indoor dirt track and picks up some dust, and almost always feels like a 'green' track. So we're usually trying to dial in more chassis flex and traction.

I'll run it as is, do some tweaks, note lap times and feelings, then swap it out for the TT and see how it compares for me.
you may also try to raise your topdeck by placing 1-2mm shims between the topdeck and bulkhead except for the spur gear assembly bulkheads.
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Old 02-09-2016, 01:28 AM   #460
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Quote:
Originally Posted by Danny-b23 View Post
If your track is dusty and feels green all of the time, it's more likely that the CF chassis produces the best result for you. The thinner 1.6mm top deck may even be useful in that situation.
Whenever the team drivers use the alloy chassis's they always use the 1.6mm top deck and often also use the split front pivot blocks.
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Old 02-09-2016, 01:29 AM   #461
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Originally Posted by yifuqiao View Post
Thanks for your information!

I am a little disappointed that the bulk head blocks and a arm shaft holder blocks aren't keyed into the chassis. I found that how i screw the bolt definitely easily affects how tight the a arm moves.
The problem I am having with this design is, the settings of the car can be easily changed upon collision, which could also create more slop , I imagine.

Does anyone have any problem with this on real track test? Do you guys have any trick to prevent it from tweaking?

I guess I will just have to examine the car every time after it gets a decent hit.
You'll find that the settings stand up to impacts more than most, if not all the other cars out there.
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Old 02-09-2016, 05:56 AM   #462
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What are the chances that a '16 with kit chassis will be faster on med-high grip carpet than a '14 with Tamale chassis, in mod?
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Old 02-09-2016, 06:36 AM   #463
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Originally Posted by grippgoat View Post
What are the chances that a '16 with kit chassis will be faster on med-high grip carpet than a '14 with Tamale chassis, in mod?
The '14 I found generates a bit more grip overall than the '15 and '16 (probabyl due to its upper link positions), but the newer cars are a lot smoother and in higher bite, that may be beneficial.

Chassis plate wise, aluminum is nearly always the way to go in mod. It gets weight lower, numbs the feel of the car out a bit, and makes the car less susceptible to grip rolling.

I know for me when I switched to the aluminum chassis I found like 3 tenths a lap on most types of tracks I run on compared to the CF.
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Old 02-09-2016, 11:50 AM   #464
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Finally finished build.
I really enjoyed the building these.
It didn't require any additional shims to make the car slop free, while my trf419 requires a lot, I also had to modify the shim options to prevent binding on my 419.
But T4 just seems to be so precisely designed.
The shocks are so much better than Tamiya ones...
Bleed hole works brilliantly, lol, this is my first time got 0 rebound without multiple tries, and it is the dead even for all shocks, I never had this experience before.
I think X ray will get all my money from now on.

https://www.dropbox.com/s/x9n6ra11fq...02.25.jpg?dl=0
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Old 02-09-2016, 08:18 PM   #465
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What are your thought on the way the 2016 handles? I am thinking of moving over from the BD7 2016 to the Xray 2016.

Just curious on how it handles and so on.
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