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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 11-06-2015, 10:26 PM   #241
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Great night tonight shaking it down. Only adjusted the front top shock position inward and ran the box set up. Oh yeah and ran 3000 in the diff and 450 Kyosho oil in the shocks.

Love the car and can't wait to get back out. Being a long time Tamiya person I was a little leary, nothing to be worried about, car was great. Thanks for all the help here.
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Old 11-08-2015, 03:47 PM   #242
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Had a good time taking the car out for its first race day yesterday. My particular first time racing at this track. Ended up taking home TQ and win out of 6 total guys. Car was solid for the most part. Only a couple little nuances I'd like to correct in the setup, but overall very happy with it. A few notes:

Ran the PF Dodge Dart in the initial shakedown a week ago and in practice yesterday before the first qualifier. Finished painting an LTCR last week, which is what I generally use, but hadn't tried the Dodge Dart yet. Ran the LTCR in the first qualifier and will definitely continue to run it. Slightly smoother feeling overall...Dart felt darty (pun intended) and "on edge" a lot of the time. LTCR smoothed this out a lot.

Made a few minor changes from the kit setup. Camber, shock locations, shock oil and other minor odds and ends....setup sheet attached for reference. Edit: File too large to upload. (Thanks RCT) Check here: https://app.box.com/s/g2znbah20s018986v5d446s0mjc4dmmw

I believe the track took video of the main...I'll post it up if they post it. Results sheet is attached. The track doesn't use MyLaps transponders, only the I-Lap system, so I had to use a rental for the time being.

Geared 42/104 (64P) and motor temps were in the 130s. Pulled most others ever so slightly on the straights but most of the time gained was in the infield which is fairly technical. I am running a Yeah Racing fan on the motor. Can probably go up another tooth or two, but we will see when I get some more time on the track.

Loosened rear belt 1 notch. Perfect tension for 13.5 here. Don't believe looser will work...

Things that I'd like to correct with the setup:
Still has slight "edginess" feel to it. Have to be gentle on the steering and the car is quick. Too rough on the steering and you'll get a lot of skid, but doesn't really spin out until you try and correct for it. Additional rear camber over front camber seemed to help here, but starting to hurt mid-corner steering, so didn't want to go further. Also reduced amount of traction compound on front to 3/4 instead of full fronts. Still has slight mid corner push. Additional front camber helped, but will probably play with roll centers and link lengths next time out. Also want to get some 4mm shims for the front axle/hex play...

SUPER pleased with the car, can't wait to get back out next weekend!

Seth
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Xray T4 2016-ruskinfl11_7_15.jpg  

Last edited by 3D-Seth; 11-08-2015 at 06:40 PM.
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Old 11-09-2015, 10:31 AM   #243
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coming from offroad, not knowing much about bodies, and such.. the last 5 or so months of racing.. i have done some testing..

my go to body is the LTCR.. like Seth said.. the dart is ok, but the LTCR seems to just be that bit better.. to me.. the Dart seems better as the traction goes up.. when its green, or slick, the dart loses the rear, or oversteers. with it getting colder, and going indoors i think the dart may come into its own. But sofar.. this is my list

1. LTCR
2. Speed6, or Dodge Dart, close between here
3. Mazda GX
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Old 11-09-2015, 01:55 PM   #244
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I just bought the Xray for speedruns. Do you guys have any tips on which motor and ESC combos to use for that?
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Old 11-09-2015, 05:26 PM   #245
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I'm building a T4 2016 and was wondering if the rear outdrives supplied with the kit would work ok with an 8.5?
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Old 11-09-2015, 06:18 PM   #246
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Quote:
Originally Posted by Plumcrzy View Post
I'm building a T4 2016 and was wondering if the rear outdrives supplied with the kit would work ok with an 8.5?
Easily, we regularly run 4.5's
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Old 11-09-2015, 06:35 PM   #247
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Quote:
Originally Posted by Skiddins View Post
Easily, we regularly run 4.5's
+1
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Old 11-09-2015, 07:33 PM   #248
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I ordered a set of spring steel outdrives for the front is that one of the first upgrades you recommend?
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Old 11-09-2015, 08:36 PM   #249
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Quote:
Originally Posted by Plumcrzy View Post
I ordered a set of spring steel outdrives for the front is that one of the first upgrades you recommend?
That seems to vary by user preference. I run the stock plastic outdrives with no issues to report. A very hard hit might break one but that's really not a big issue to bother replacing them IMO.
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Old 11-10-2015, 03:30 AM   #250
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Quote:
Originally Posted by Plumcrzy View Post
I ordered a set of spring steel outdrives for the front is that one of the first upgrades you recommend?
If you are running modified I would go with the steel outdrives as these are much stronger. For stock where you need to take the most out of your motor I would stick with composite outdrives, thus keeping the drivetrain as light as possible.
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Old 11-11-2015, 07:27 PM   #251
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I'm working on my build and I'm wondering if I can use the aluminum servo saver arms with the graphite steering plate?
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Old 11-11-2015, 08:45 PM   #252
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I run 17.5 stock and I have broken the composite out drives twice. I upgraded to the steel ones and have never had the problem again.
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Old 11-11-2015, 08:54 PM   #253
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Quote:
Originally Posted by mbykerman View Post
I run 17.5 stock and I have broken the composite out drives twice. I upgraded to the steel ones and have never had the problem again.
Did you break them in normal driving or did you take any hits?
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Old 11-11-2015, 10:19 PM   #254
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Quote:
Originally Posted by mbykerman View Post
I run 17.5 stock and I have broken the composite out drives twice. I upgraded to the steel ones and have never had the problem again.
same here, it really boils down to driver's preference.
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Old 11-12-2015, 03:41 AM   #255
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The spring steel outdrives are one of the upgrades I install while building a new kit, doesn't matter if running a boosted 4.5 or a 17.5. Much more solid and reliable than composite or even aluminum. I've seen composite shatter, and aluminum bend.

The only time I might use composite over the spring steel is if I was running 13.5 or slower at a track that didn't have solid boards. Most tracks in the U.S., especially carpet tracks, aren't setup that way though.
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