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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 11-16-2016, 08:09 AM   #1066
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where do I buy a+ parts for my T4? thanks
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Old 11-26-2016, 06:37 AM   #1067
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Quick steering question. I currently run my steering link/turnbuckle on the top center hole if the servo saver. What would it change if I moved it down one hole so it was in the middle center hole if the servo saver? Would it make the steering a little smoother maybe?
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Old 11-26-2016, 06:42 AM   #1068
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Quick steering question. I currently run my steering link/turnbuckle on the top center hole if the servo saver. What would it change if I moved it down one hole so it was in the middle center hole if the servo saver? Would it make the steering a little smoother maybe?
Slower transit time and less travel, you can get the same effect with the settings on your radio.
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Old 11-29-2016, 05:53 AM   #1069
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I am trying to figure out a good shock package to run for carpet. Really I am trying to find an entire setup to use for a someone that is new to TC. Anyone have any links to something good?
But as far as shocks, what oil weight and springs should I be running. I was looking at this spring set at Reflex.
http://www.reflexracing.net/RSD-Defi...th_p_2545.html
OR THESE
http://www.reflexracing.net/RSD-20mm...16_p_2550.html

Also, what pills should I be using in the hinge pin holders?

We run foam tires if that matters. I am running pink/orange in front and double pink on the rear seems to be the setup majority of ppl run.
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Last edited by Slapjack; 11-29-2016 at 06:04 AM.
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Old 11-29-2016, 03:53 PM   #1070
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This isn't really T4 specific but I am just getting into onroad with a T4 and I am wondering if someone can recommend a decent lipo to use for 17.5 onroad. I was looking at promatch and SMC. Ive had Orcas that I used in offroad and I didn't have much luck with them. Thanks.
I use and recommend the SMC Extreme 7.4v 100C
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Old 11-29-2016, 03:57 PM   #1071
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Has anyone ever tested the T4 2017 with flexible alu chassis on asphalt tracks?
If yes, how was the experience?
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Old 12-04-2016, 04:48 PM   #1072
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Has anyone used the trinity rear aluminum hubs on the t4? Are they good quality?
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Old 12-10-2016, 08:17 AM   #1073
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Default Achieve more rear traction by changing the suspension arm's bushings

Hi guys

I would need to have more grip at my rear due to low traction track.

May I know whether can I achieve more rear grip by changing my T4 2016 rear suspension arm's bushings to 1 point downwards, instead of the default neutral (i.e. the dot on the bushing is in the center)? I suppose this will make my rear to have more downforce and thus, having more rear grip?

Please advise on whether am I right to say that?

Thank you.
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Old 12-10-2016, 08:13 PM   #1074
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Originally Posted by Kakaru View Post
Hi guys

I would need to have more grip at my rear due to low traction track.

May I know whether can I achieve more rear grip by changing my T4 2016 rear suspension arm's bushings to 1 point downwards, instead of the default neutral (i.e. the dot on the bushing is in the center)? I suppose this will make my rear to have more downforce and thus, having more rear grip?

Please advise on whether am I right to say that?

Thank you.
It will increase roll thus give more grip. Downforce is aero...this is mechanical. Raise the camber link on the bulkhead a tick as well for even more roll (dig in).
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Old 12-10-2016, 08:41 PM   #1075
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Originally Posted by Kakaru View Post
Hi guys

I would need to have more grip at my rear due to low traction track.

May I know whether can I achieve more rear grip by changing my T4 2016 rear suspension arm's bushings to 1 point downwards, instead of the default neutral (i.e. the dot on the bushing is in the center)? I suppose this will make my rear to have more downforce and thus, having more rear grip?

Please advise on whether am I right to say that?

Thank you.
Lowering the pins will make the car roll more, however I've found it can make the car feel lazy to react on the rear, even with only the 0.5 inserts.

Something to consider instead is try narrowing the pins, so go to 0.5 or 1.0 in on the mounts. This will help to grip the rear end up also, and make the car more consistent.

HiH
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Old 12-10-2016, 11:14 PM   #1076
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Lowering the pins will make the car roll more, however I've found it can make the car feel lazy to react on the rear, even with only the 0.5 inserts.

Something to consider instead is try narrowing the pins, so go to 0.5 or 1.0 in on the mounts. This will help to grip the rear end up also, and make the car more consistent.

HiH
Ed
Thanks Jeff and Ed. I was confused after reading some articles on roll center to gain more grip on a low traction track. So if I get you guys correctly, lower center roll gives more grip, and by inserting the alu suspension arm's' bushings pointing DOWN on both front and rear (i.e. making them nearer to my lower deck/chassis) will give me more roll center (more grip). Please correct me if I'm wrong.

Thank you.
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Old 12-11-2016, 02:27 AM   #1077
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Originally Posted by Kakaru View Post
Thanks Jeff and Ed. I was confused after reading some articles on roll center to gain more grip on a low traction track. So if I get you guys correctly, lower center roll gives more grip, and by inserting the alu suspension arm's' bushings pointing DOWN on both front and rear (i.e. making them nearer to my lower deck/chassis) will give me more roll center (more grip). Please correct me if I'm wrong.

Thank you.
That's correct. But lowering the roll centre on the pin bushing may also make the car slower to react, which could be worse in quick changes of direction.
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Old 12-11-2016, 04:19 PM   #1078
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That's correct. But lowering the roll centre on the pin bushing may also make the car slower to react, which could be worse in quick changes of direction.
Understood. Thanks for your advice.
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Old 12-11-2016, 07:26 PM   #1079
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Understood. Thanks for your advice.
Right, so down for grip...in for snappy. Do the diagonally down and in .5 to start.
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Old 12-11-2016, 09:49 PM   #1080
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Right, so down for grip...in for snappy. Do the diagonally down and in .5 to start.
If it were me, I would go 0.5 in to start, and then try 0.5 down if that still hasn't solved the problem
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