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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 07-06-2016, 07:24 AM   #826
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Quote:
Originally Posted by Kakaru View Post
Hi Guys,

I'm pretty new to RC and I just built a new XRay T4 2016 lately. Can you all please advise me on what are the significant or highly recommended XRay hop-up parts (must have item(s)), other than the following hop-up parts or important items that I already have.

1. All countersunk screws are titanium and others are orange aluminum screws;

2. Xray Spring Steel Solid Axle Driveshaft Adapter 2 pcs Black w/ Blades For T3 T4 (Front Solid Axles) #XR-305137;

3. T4 Carbon Fibre Graphite + Alu Fully Adjustable Battery Holder #306191;

4. Alu Dual Servo Saver Arm #302525

5. Hudy Alu Servo Horn (Sanwa, Airtronics, JR, KO Propo) - 23T #293501

6. XRay Alu XRay Shock Springs Retaining Collar - Orange # 308031-0

7. XRay T4 Foam Bumper (Hard) #301226

8. Countersunk orange alu washers (4 pieces) for servo float.

Thank you in advance.
What surface are you running? Carpet or outdoor asphalt.

Carpet: I would have picked up 2.6 and 2.7 springs and the progressive 2.4-2.7 and progressive 2.5-2.8 springs. One step stiffer sway bars and one step softer as well as tuning options.

Asphalt: Same springs and sway bars, but also the progressive pistons for the front.

You want to have tuning options to adjust the car.
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Old 07-07-2016, 04:11 AM   #827
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Myself and several other RCAmerica drivers have been working on a list of popular options for the T4'16. We've been taking our time with it because we want to provide the best & most accurate list possible. Our list will detail what options we think are important to have during the initial build. It will also indicate which tuning options we recommend specifically for Asphalt or Carpet applications.

Hopefully we can finish up our final review & share soon.
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Old 07-08-2016, 06:16 AM   #828
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I see some people are shaving the layshaft down so it doesn't touch on the topdeck on the 16 car, I haven't tried this myself, I have only tried raising the top deck 1mm. I wasn't that keen on this, has anybody else experimented with it?
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Old 07-09-2016, 03:15 AM   #829
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Always run top deck raised tbh. More steering, IMO. I wouldn't even lower it to run the centre post, just add a 1mm shim. Only time I'd lower the top deck would be to put the screws in the layshafts mounts... which locks the car down too much in the rear, and takes away steering. And that's predominantly low to medium grip asphalt tracks.
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Old 07-09-2016, 04:08 AM   #830
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I also though it's best to always run with the top deck raised. Then I tried to lower it just to experiment and instantly got almost half a second faster laps. Now I even prefer to run with the layshaft screws in. Car is slightly slower, but much more consistent and easier to drive. It all depends on the track.
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Old 07-09-2016, 07:43 AM   #831
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Quote:
Originally Posted by TryHard View Post
Always run top deck raised tbh. More steering, IMO. I wouldn't even lower it to run the centre post, just add a 1mm shim. Only time I'd lower the top deck would be to put the screws in the layshafts mounts... which locks the car down too much in the rear, and takes away steering. And that's predominantly low to medium grip asphalt tracks.
Quote:
Originally Posted by perzeus View Post
I also though it's best to always run with the top deck raised. Then I tried to lower it just to experiment and instantly got almost half a second faster laps. Now I even prefer to run with the layshaft screws in. Car is slightly slower, but much more consistent and easier to drive. It all depends on the track.
May help explain why the Yoke BD7'16's lower CoG hasn't improved it, certainly not in the eyes of almost everyone I know who's run it (and most of them have sold them on)
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Old 07-10-2016, 04:14 AM   #832
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What would be a better fit for black carpet. Avid chassis or Xray standard aluminum?
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Old 07-10-2016, 09:21 AM   #833
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I run the 301140 Xray aluminum chassis, IMO the best overall choice for carpet. Calms the car down and improves consistency for me.
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Old 07-10-2016, 11:07 AM   #834
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Quote:
Originally Posted by Skiddins View Post
May help explain why the Yoke BD7'16's lower CoG hasn't improved it, certainly not in the eyes of almost everyone I know who's run it (and most of them have sold them on)
all i can say its a difficult car for low-med grip.
definitely hard to like of me and i see myself change next season to a different brand.
lot of ppl go back to theBD7 2014 ...
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Old 07-10-2016, 08:40 PM   #835
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Default New items for T4

RSD163 RSD 4mm Carbon Fiber Shock Towers for XRAY T4



RX4-16CF RX4 2016 2.0mm Quasi Carbon Fiber chassis for XRAY T4

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Old 07-11-2016, 07:31 AM   #836
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Hi Cristian, been waiting for someone to do a 2mm chassis for the 16 car I take it this generates more traction in low grip conditions same as Yokomo's new one does?
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Old 07-11-2016, 12:03 PM   #837
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Hi Cristian, been waiting for someone to do a 2mm chassis for the 16 car I take it this generates more traction in low grip conditions same as Yokomo's new one does?
The reports from our lead testing drivers was the the car made more grip and had better steering. Most of the testing was done on Parking lot tracks with medlium low to medium high grip. A lot of it has to do with the revised shape. We also have an alloy chassis with the same shape coming which was I think 3 tenths faster per lap at MHIC over our old design. Sounds crazy, but it has a lot to do with how we isolated the flex points to in front and behind the bulkheads. When used with top deck stiffeners and thicker towers, it seemed like the car carried more corner speed. When running softer chassis it seems like the cars are a little bit slower in transition and the extra deflection seems to reduce the amount of force the tire digs into the surface with.
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Old 07-12-2016, 03:13 AM   #838
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Thanks Cristian, will be interesting to here people's feedback
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Old 07-14-2016, 10:01 PM   #839
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Our friends over at RC-Xpress are looking for test drivers for their newly released DCJ's for Yokomo BD7! Head over to their page here to apply!
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Old 07-15-2016, 09:13 AM   #840
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Where would your new alloy chassis fit into the stiffness curve CT? Id like something between full soft of the cf and xray hard aluminum. I like the hard chassis, but might want something a little softer for high traction sprayed ashphalt. But not full flex cf soft.
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