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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 06-14-2016, 03:59 PM   #796
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Experimentation.

You want to gear your motor so you are getting to top speed around 3/4 way down the straight, but still have good punch out of corners.

All the while keeping temperatures of the motor after a 6min run around 60-80deg.C

Different motors or the same turn rating have different RPM and torque characteristics. And then playing with end bell timing will alter this as well (higher timing means more RPM - but more heat typically)

Common range for a modern 13.5 motor is 3.8-4.8 and circa 50deg total timing (be aware not all motors are at zero when showing zero on the can - R1 is like this for example, 30deg on the can is more like 60deg absolute)
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Old 06-14-2016, 06:39 PM   #797
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Hey guys,

kind of an off the wall question, is there major differences between the 15 and 16 chassis?

I may be pick one up , this would be a dedicated carpet car. Thanks!!
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Old 06-14-2016, 06:57 PM   #798
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Quote:
Originally Posted by JEFFs SC10 View Post
Hey guys,

kind of an off the wall question, is there major differences between the 15 and 16 chassis?

I may be pick one up , this would be a dedicated carpet car. Thanks!!
The motor mount is different and there were more mounting options for the ARS system. The 2016 kit also came with ECS shafts in the kit. Other then that its all the same.
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Old 06-14-2016, 07:03 PM   #799
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Quote:
Originally Posted by JEFFs SC10 View Post
Hey guys,

kind of an off the wall question, is there major differences between the 15 and 16 chassis?

I may be pick one up , this would be a dedicated carpet car. Thanks!!
Main difference of the 16 from the 15 are as follows:

1. chassis of 16 has more motor mount holes as the motor mount plate in the 16 is longer to accommodate 2 more holes.
2. the 16 kit comes with ECS front driveshafts, none in the 15
3. top deck of the 16 has more space around the motor for easy access to the pinion gear
4. the rear blocks of the 16 has holes for ARS roll center adjustment

That's it I think...
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Old 06-14-2016, 07:25 PM   #800
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hmmm those ECS shafts are definitely needed.

Thank you!
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Old 06-14-2016, 09:08 PM   #801
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Quote:
Originally Posted by JEFFs SC10 View Post
hmmm those ECS shafts are definitely needed.

Thank you!
Yup, I agree, the ECS aids in steering for me. I've got a 15 and didnt upgrade to a 16. The hop ups I bought for my 15 was the ECS and steel front drive cups.
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Old 06-24-2016, 11:38 AM   #802
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Default Setup sheet

Hello, just a few questions about the setup sheet format. I was wondering what the roll center area between the eccentric inserts at the bottom of the page on the left was about. Also, for the wheelbase area on the top, are the squares to be filled out representing the general position of the arms (forward middle or back) or are they the size of spacers used in front (which would have the opposite wheelbase effect). Thx for clarifying.
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Old 06-24-2016, 11:42 AM   #803
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You can use .5mm or 1mm inserts to change the roll centers in the direction indicated.

The wheelbase checkboxes indicate how many shims are in front of each arm. So stock settings would have a single (1) checked for both front and back. If you wanted to move the arms back, you'd have both of the 1 boxes checked. All the way forward would have just the 0 checked.
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Old 06-28-2016, 06:15 AM   #804
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where do you guys get sets of xray springs? looking to get a set of progressive and linear springs
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Old 06-28-2016, 06:51 AM   #805
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Does anyone have a good starting setup for a low bite asphalt track ?
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Old 06-28-2016, 07:03 AM   #806
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Quote:
Originally Posted by phatboislim View Post
where do you guys get sets of xray springs? looking to get a set of progressive and linear springs
I've had good luck with the springs from Reflex Racing.
http://www.reflexracing.net/RSD-20mm...16_p_2550.html
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Old 06-28-2016, 07:09 AM   #807
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ok thanks!!
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Old 06-29-2016, 08:20 AM   #808
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Anyone have a good place to start for a 21.5 gearing. With 64p gears. 80x36 crc fast track cpt. Thanks in advance. Been outta on road for a while now
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Old 06-29-2016, 08:49 AM   #809
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Quote:
Originally Posted by tazfam2 View Post
Anyone have a good place to start for a 21.5 gearing. With 64p gears. 80x36 crc fast track cpt. Thanks in advance. Been outta on road for a while now
depends on motor and timing....but 4.0 to 3.5 range is about average for that size track
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Old 07-01-2016, 06:05 AM   #810
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Does anyone make a 2mm graphite chassis for the car?
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