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R/C Tech Forums Thread Wiki: Xray T4 2016
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Last edit by: R Dodge
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 01-20-2016, 11:39 AM   #391
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Well really 20g is not all that much. A LCG pack would allow you to put the extra weight needed to make minimum down low, and wherever you'd want it. Either way no matter what batteries/electronics I've used I'd always have to compensate more on one side to get equal L/R balance. Just the nature of the game.
This is additional 20g to already 60g on the chassis! But what confuses me is when you look at the pictures or. set-up sheets you can hardly find any weights on the chassis. OK I maybe they could be down the middle between the battery and electrics?
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Old 01-20-2016, 04:00 PM   #392
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With a carbon chassis and the the lighter packs I've had to add 100g to my car and and the slight side to side difference wasn't that big of an issue. To be honest, I couldn't tell on track.
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Old 01-20-2016, 08:04 PM   #393
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Originally Posted by Troy Carter View Post
With a carbon chassis and the the lighter packs I've had to add 100g to my car and and the slight side to side difference wasn't that big of an issue. To be honest, I couldn't tell on track.
I too can't tell much difference... you can try to use 4 scales and put on top of each tire to see the difference of the weight...

Also check your bearings including the ones on spur gear...
also the belt are evenly balanced tension too
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Old 01-20-2016, 11:20 PM   #394
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Originally Posted by Troy Carter View Post
With a carbon chassis and the the lighter packs I've had to add 100g to my car and and the slight side to side difference wasn't that big of an issue. To be honest, I couldn't tell on track.
Where do you put the 100g of weights?
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Old 01-21-2016, 02:51 AM   #395
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Originally Posted by xps800doo View Post
What does the alum chassis weight vs the carbon? Has to be the best way to add weight low...?
On the '14 the alu chassis was around 30g heavier if I recall
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Old 01-21-2016, 02:55 AM   #396
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Originally Posted by Geberit View Post
This is additional 20g to already 60g on the chassis! But what confuses me is when you look at the pictures or. set-up sheets you can hardly find any weights on the chassis. OK I maybe they could be down the middle between the battery and electrics?
Remember Xray do 20 and 30g weights specifically for placing in the middle.

Looks like the weights at the back of the car in your first picture are stacked, so may well have more than you think.
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Old 01-21-2016, 04:06 AM   #397
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Quote:
Originally Posted by Geberit View Post
This is additional 20g to already 60g on the chassis! But what confuses me is when you look at the pictures or. set-up sheets you can hardly find any weights on the chassis. OK I maybe they could be down the middle between the battery and electrics?
I know it is difficult to see in pictures but the top drivers are adding close to 100gr. to their cars when running the graphite chassis. I asked Hagberg at DHI Cup and he said to place the weights as central as possible.

It's a mess and I hope we see a rule proposal this year to lower the weight in the touring class.

Br. Emil
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Old 01-21-2016, 04:29 AM   #398
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Sorry for the double post. Not sure how to remove.

Last edited by Emil; 01-21-2016 at 06:28 AM. Reason: Double post
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Old 01-21-2016, 05:00 AM   #399
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Originally Posted by Emil View Post
I know it is difficult to see in pictures but the top drivers are adding close to 100gr. to their cars when running the graphite chassis. I asked Hagberg at DHI Cup and he said to place the weights as central as possible.

It's a mess and I hope we see a rule proposal this year to lower the weight in the touring class.

Br. Emil
This is the main thing that I wanted to hear

Thx
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Old 01-24-2016, 07:59 PM   #400
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Default Motor mount

Hello,

Picked up a used t4 14. Stripped 2 Xray 64p Spurs at the track today because the motor shifted because I hit the boards lightly. Any way of proventing the move aside from better driving????
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Old 01-24-2016, 08:00 PM   #401
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Originally Posted by Rcracing01 View Post
Hello,

Picked up a used t4 14. Stripped 2 Xray 64p Spurs at the track today because the motor shifted because I hit the boards lightly. Any way of proventing the move aside from better driving????
Washers on the motor screws. Crank the screws down. You can also lightly sand the motor mount and can of the motor to add friction.
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Old 01-24-2016, 08:43 PM   #402
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Default Spur

Ok great I'll try those.
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Old 01-24-2016, 11:14 PM   #403
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Originally Posted by Rcracing01 View Post
Hello,

Picked up a used t4 14. Stripped 2 Xray 64p Spurs at the track today because the motor shifted because I hit the boards lightly. Any way of proventing the move aside from better driving????
I had this problem until i noticed that one of the chassis screws that hold the motor mount had come out.
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Old 01-25-2016, 03:55 AM   #404
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Originally Posted by Rcracing01 View Post
Hello,

Picked up a used t4 14. Stripped 2 Xray 64p Spurs at the track today because the motor shifted because I hit the boards lightly. Any way of proventing the move aside from better driving????
Clean the faces of the motor and the mount with brake cleaner. Use M3x8mm screws with a 0.5mm alloy shim under the head. I find that's the maximum length of screw you can use without the thread hitting the stator, at least on the motors I use.

Then just do the screws up damn tight, and it won't move.
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Old 01-25-2016, 05:33 PM   #405
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Just wondering what the differences are of running hard or med plastic parts? My experience with my AE B5M, med will flex more and hard will break easier.

With the T4, will hard be more responsive, and med more grip due to more flex? Are either more fragile than the other?

Also, for a medium grip carpet track, will the stock chassis or the aluminum chassis be more preferable in 17.5 blinky? I have both, just haven't tried them both yet.
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