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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 05-09-2016, 03:36 PM   #751
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With 106/38 you'd get 5.3
With 110/38 you'd get 5.5

Don't know if either will fit the Xray though.
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Old 05-09-2016, 05:01 PM   #752
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Thanks CPLUS. I made a test with a #100 (and a 34 or 35 pinion) but there was not enough space between motor and upper deck. That's why I thought of looking for a bigger spur (but how much bigger?).
Where is interference occurring? Are you suggesting the pinion won't fit?

I have 96/43 right now on my T4 no dramas.
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Old 05-09-2016, 05:35 PM   #753
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Quote:
Originally Posted by cplus View Post
Where is interference occurring? Are you suggesting the pinion won't fit?

I have 96/43 right now on my T4 no dramas.
Between motor (housing) and upper deck (Spur's diameter too small)
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Old 05-09-2016, 05:56 PM   #754
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Originally Posted by refsiul22 View Post
Between motor (housing) and upper deck (Spur's diameter too small)
Take a photo. That sounds very odd.

Does your motor not have a chamfer or something!
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Old 05-10-2016, 09:34 AM   #755
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Originally Posted by cplus View Post
Take a photo. That sounds very odd.

Does your motor not have a chamfer or something!
Don't have my car around. But tried to ilustrate my problem in the following PrtScn [see red arrow]. Need to choose a bigger spur. I am going to try 104-106 know.


Source: Xray T4 2016 manual
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Old 05-10-2016, 10:31 AM   #756
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38/90 minimum 5.00
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Old 05-10-2016, 06:03 PM   #757
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Tips are good.
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Old 05-11-2016, 07:44 PM   #758
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Originally Posted by refsiul22 View Post
Don't have my car around. But tried to ilustrate my problem in the following PrtScn [see red arrow]. Need to choose a bigger spur. I am going to try 104-106 know.


Source: Xray T4 2016 manual
Your motor doesn't have aggressive front can cuts or chamfer I presume.

My motor doesn't touch the top deck even when at max rearward position on the motor mount.



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Old 05-11-2016, 08:54 PM   #759
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Putting the 1mm shim will give you a little more room.
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Old 05-12-2016, 01:36 AM   #760
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Your motor doesn't have aggressive front can cuts or chamfer I presume.

My motor doesn't touch the top deck even when at max rearward position on the motor mount.
Two things, firstly, your motor conveniently has a cutout where it would be against the top deck with some other motors.
Secondly, I can see from the rear motor screw that your motor isn't quite fully rearward in those slots, though it won't go further back, which tells me your motor can is actually up against the layshaft mount on that side
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Old 05-12-2016, 03:38 AM   #761
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Good spotting. Be an odd motor to manage to get further back....

And yes the cutout does help a little.

But I'm at 96/31 like that, so quite surprised 100/35 doesn't fit.
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Old 05-12-2016, 06:06 AM   #762
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Good spotting. Be an odd motor to manage to get further back....

And yes the cutout does help a little...
I had the same thing recently, spent ages looking at the top deck and wondering why I couldn't get it to touch the motor no matter how far I pushed it back..... the realised it was fouling elsewhere
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Old 05-14-2016, 11:22 PM   #763
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I've been noticing that some of the team drivers have been running the ARS with aluminum c-hubs compared to the standard hard or graphite one...what would that do to the handling characteristics??
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Old 05-15-2016, 12:28 AM   #764
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All about gaining corner speed.

They are running it at Riccione this weekend - first Asphalt ETS for the year.

ARS can be tuned to give more or less rear toe as a car rolls.

Typically, it's set up to lower the toe mid corner and this gives less rear grip and in turn more steering.
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Old 05-15-2016, 12:04 PM   #765
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All about gaining corner speed.

They are running it at Riccione this weekend - first Asphalt ETS for the year.

ARS can be tuned to give more or less rear toe as a car rolls.

Typically, it's set up to lower the toe mid corner and this gives less rear grip and in turn more steering.
No I understand that but I've been noticing more of the team drivers running the aluminum C-Hubs for the ARS set-up and wondered why or what that gives you
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