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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 01-02-2016, 07:14 PM   #361
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when i asked the same question on arm sweep,i was told it gives more mid and exit steering,nothing to do with turn in,toe out is more for initial,is it not?
Probably depends on which way you sweep the arms...forward or backward...
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Old 01-03-2016, 06:13 PM   #362
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Any one try the aluminum chassis yet? Which brand? I run on a high bite carpet track and would like to try one.
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Old 01-03-2016, 06:49 PM   #363
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Originally Posted by goin2drt View Post
Any one try the aluminum chassis yet? Which brand? I run on a high bite carpet track and would like to try one.
Xray's.
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Old 01-03-2016, 09:04 PM   #364
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The AVID aluminum chassis is pretty popular. Definitely tried and tested.
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Old 01-03-2016, 10:00 PM   #365
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Originally Posted by goin2drt View Post
Any one try the aluminum chassis yet? Which brand? I run on a high bite carpet track and would like to try one.
If you run at tq raceway you don't need it ! Save your money
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Old 01-04-2016, 05:51 AM   #366
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So I just thought I'd weigh in with some experiences of the changing flex positions on the '16 motor mount....

When it was a '15, I pretty much ran the team driver forward only single screw (no nut) option on the lower motor mount. Always seemed to work nicely.

Since having spoken to Olly and Alex about their ETS setups, I realised on the '16 there was a fairly decent option to change the flex by moving the screw back. I've since tested it many many times... and have come to this conclusion;

Hole 1 - Most steering, car feels like it pivots more around the centre, front feels less reactive initially

Hole 2 - Mid range steering, good compromise between 1&3. Piviots more towards rear, front has smoother turn in, but isn't too locked in in the tight stuff. This is currently my go to option for low grip outdoor asphalt.

Hole 3 - Less steering, car feels longer, and more 'locked in' on the rear. Doesn't rotate as well, but a bit smoother still than 2.

(Note, they are all without running the screw&nut, and with a 1mm raised top deck)

Combine those options with the centre post, and also locking the top deck down... the car has a load of tuning options without touching the geometry

Hopefully someone finds that useful.
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Old 01-04-2016, 06:57 AM   #367
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Originally Posted by TryHard View Post
So I just thought I'd weigh in with some experiences of the changing flex positions on the '16 motor mount....

When it was a '15, I pretty much ran the team driver forward only single screw (no nut) option on the lower motor mount. Always seemed to work nicely.

Since having spoken to Olly and Alex about their ETS setups, I realised on the '16 there was a fairly decent option to change the flex by moving the screw back. I've since tested it many many times... and have come to this conclusion;

Hole 1 - Most steering, car feels like it pivots more around the centre, front feels less reactive initially

Hole 2 - Mid range steering, good compromise between 1&3. Piviots more towards rear, front has smoother turn in, but isn't too locked in in the tight stuff. This is currently my go to option for low grip outdoor asphalt.

Hole 3 - Less steering, car feels longer, and more 'locked in' on the rear. Doesn't rotate as well, but a bit smoother still than 2.

(Note, they are all without running the screw&nut, and with a 1mm raised top deck)

Combine those options with the centre post, and also locking the top deck down... the car has a load of tuning options without touching the geometry

Hopefully someone finds that useful.
All, useful info
Have you tried the center post on the '16 yet?

I used to use it quite a lot on the '15, especially on carpet, but the one time I've tried it on the 16 it seemed to make the car understeer more.
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Old 01-04-2016, 02:06 PM   #368
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Default motor flex

Quote:
Originally Posted by TryHard View Post
So I just thought I'd weigh in with some experiences of the changing flex positions on the '16 motor mount....

When it was a '15, I pretty much ran the team driver forward only single screw (no nut) option on the lower motor mount. Always seemed to work nicely.

Since having spoken to Olly and Alex about their ETS setups, I realised on the '16 there was a fairly decent option to change the flex by moving the screw back. I've since tested it many many times... and have come to this conclusion;

Hole 1 - Most steering, car feels like it pivots more around the centre, front feels less reactive initially

Hole 2 - Mid range steering, good compromise between 1&3. Piviots more towards rear, front has smoother turn in, but isn't too locked in in the tight stuff. This is currently my go to option for low grip outdoor asphalt.

Hole 3 - Less steering, car feels longer, and more 'locked in' on the rear. Doesn't rotate as well, but a bit smoother still than 2.

(Note, they are all without running the screw&nut, and with a 1mm raised top deck)

Combine those options with the centre post, and also locking the top deck down... the car has a load of tuning options without touching the geometry

Hopefully someone finds that useful.
when you say hole 1 to hole 3 is this looking at them from the font of the car and is it with screw in or out

thanks
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Old 01-04-2016, 02:41 PM   #369
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when you say hole 1 to hole 3 is this looking at them from the font of the car and is it with screw in or out

thanks
Forward most hole is 1, 3 rear most, as per the '16 setup sheet.
I have never run the screw and nut on my 15 or 16... no need IMO, if you are running one of the other flex screw positions.
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Old 01-04-2016, 02:46 PM   #370
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All, useful info
Have you tried the center post on the '16 yet?

I used to use it quite a lot on the '15, especially on carpet, but the one time I've tried it on the 16 it seemed to make the car understeer more.
Not on the 16 yet. Only time I really ever used it on the 15 was to lock the rear in and stop it snapping in quick direction changes. But the majority of the time I find the raised top deck to give more steering, and quicker..

The other thing I haven't tried yet is putting multiple screws in underneath (ie hole 1 and 3). Something else to add to the list
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Old 01-04-2016, 03:29 PM   #371
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If you run at tq raceway you don't need it ! Save your money
I do and thanks for that. Just seems like everyone is running them so I thought I would try. You may be right though. Seems like the guys with them their cars seem less "twitchy" and smoother. If that makes sense.
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Old 01-11-2016, 04:43 PM   #372
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Not on the 16 yet. Only time I really ever used it on the 15 was to lock the rear in and stop it snapping in quick direction changes. But the majority of the time I find the raised top deck to give more steering, and quicker..

The other thing I haven't tried yet is putting multiple screws in underneath (ie hole 1 and 3). Something else to add to the list
I also managed to accidentally run for a few meetings without any screws in that block at all, except for the pan head that holds that plate to the motor mount.
Despite running Mod ion carpet etc it has survived without any bent parts etc.
Although there is obviously some movement, I think the head of the pan head screw prevents the mount from moving more than a fraction of a mm in any direction.
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Old 01-12-2016, 06:53 AM   #373
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Originally Posted by CristianTabush View Post
No, the T4 comes with an 84T 48P gear. You will need 92-96T 64P ideally for USGT (69-72 48P)
will that put the motor in about the middle of the adjustment range on the mount?
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Old 01-12-2016, 01:43 PM   #374
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anybody have the link to the setup book that they refer to in the manual? can't seem to find it...
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Old 01-12-2016, 02:18 PM   #375
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anybody have the link to the setup book that they refer to in the manual? can't seem to find it...
You have to use the one for the T3, although Xray mention the manual there is not one for T4
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