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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 02-19-2016, 12:05 AM   #526
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Is there a low cost fan mount option? $25 usd seems a little excessive
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Old 02-19-2016, 01:19 AM   #527
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Quote:
Originally Posted by valk View Post
Is there a low cost fan mount option? $25 usd seems a little excessive
Reflex makes a nice mount that is a little cheaper. I've used this plenty in the past, but have always had to open up the holes a little on the fan for the screw to go through and thread into the mount.

http://www.reflexracing.net/RSD-XRAY...an_p_1759.html

Also, Motiv has a mount that's a few bucks cheaper than the Reflex but I haven't tried this one yet to give any feedback on it.

http://motivrc.com/accessories/#!/FA...egory=13438641
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Old 02-19-2016, 01:29 AM   #528
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Regarding the front diff, I haven't run one myself in almost 2 years but last I did was with 2.5 million cSt fluid from Gravity. As I recall, the front diff improved steering on corner entry but on power I felt it gave up a little of the forward drive that the solid front axle provides. Gravity also now has a 20 million cSt "putty" that has just recently become available that I believe EA used at Snowbirds on high bite carpet with pretty great results.

Over the past year or so I've been working towards a more kit-based setup so I've stuck with the spool for all applications.

http://www.teamgravityrc.com/store1/...=0&sort=normal
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Old 02-19-2016, 01:50 AM   #529
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Originally Posted by valk View Post
Is there a low cost fan mount option? $25 usd seems a little excessive
the ultimate low cost solution is to use double sided tape to mount it on the chassis behind the motor, works pretty well.
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Old 02-19-2016, 06:14 AM   #530
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Thanks so much for the inputs @alecladanga @R Dodge, i will just give the stock setup some practice then, hopefully my fingers can still handle. ha
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Old 02-19-2016, 08:30 AM   #531
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Quote:
Originally Posted by R Dodge View Post
Reflex makes a nice mount that is a little cheaper. I've used this plenty in the past, but have always had to open up the holes a little on the fan for the screw to go through and thread into the mount.

http://www.reflexracing.net/RSD-XRAY...an_p_1759.html
Nick - I use this one as well and it works great. The spacing is a bit off for some fans, so they require a little "force" to get to install, but otherwise it is great.
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Old 02-19-2016, 08:50 AM   #532
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If you put a little thought into it, fan mounts aren't that hard to make. I've used old servo mounts and top deck standoffs for years, trim to fit your location and your good to go. Why spend money when you have parts lying around?
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Old 02-19-2016, 09:13 AM   #533
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Ill prob pick up the rsd one. Motive one looks.... Not ellegant.

I would use shoe goo but my windytrumpet doesnt have a large enough flat spot i think.
There is the wtf one but. Id like to stay away from clamping style.

Welp. For a few weeks it will be shoe goo hah. Canada shipping =(
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Old 02-19-2016, 11:27 AM   #534
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Quote:
Originally Posted by alecladanga View Post
My 2 cents (driving the t4 '15 for more than 11 months now), it all depends on you and how you are really connected and familiar with your car. As I started with my '15 last year, I was using a Futaba 4PK radio and doing fine. When I switched to the M12S, I got faster, more consistent and got more "connected to car" to the point I was confident and daring enough to make set up changes in the kit and test it out and see my performance.

Prior to the end of 2015, I tested the Hagberg set up but retained some set ups that I felt were more suited to my driving. I posted the fastest lap and most number of laps in a 5 min run for 17.5T blinky in our recent club race.

To each his own
Appreciated the feedback, man.
Lol, I guess I should start saving for m12s then.
I am currently using m11x, while it is way better than my previous GT3B, but I feel like it is outdated after trying my friend's m12s.
But I will keep driving like this though, I have only had the car for 2 weeks.
Radio is gonna be an upgrade , but it is probably not bottom neck right now.
Could you tell me what you found could have been improved for your driving style? I know it may not work for me, but I would like some inspiration.
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Old 02-20-2016, 05:45 AM   #535
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Originally Posted by yifuqiao View Post
Appreciated the feedback, man.
Lol, I guess I should start saving for m12s then.
I am currently using m11x, while it is way better than my previous GT3B, but I feel like it is outdated after trying my friend's m12s.
But I will keep driving like this though, I have only had the car for 2 weeks.
Radio is gonna be an upgrade , but it is probably not bottom neck right now.
Could you tell me what you found could have been improved for your driving style? I know it may not work for me, but I would like some inspiration.
Go for the sanwa/airtronics MT4, it will give you the same feeling. (also its lighter and fells better in the hand IMO)
Sanwa gives you a smoother feeling in the car, futaba/spektrum etc has a more aggresive feeling. tried a friends xray with his futaba, the car felt broken, very unpredictable, switched to a sanwa radio between the runs, the car was alot better!
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Old 02-20-2016, 07:14 AM   #536
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Quote:
Originally Posted by ogreasurada View Post
Hi, just got back in to rc after 2 years of blank, just got the new t4, and noticed it comes with a spool at the front axle, the track i will be running will be low-med surface, only med-high during race days, so should i get a front diff for practice time or just stick to the stock setup to get some feel first. thx
my home track (Asphalt) is also the same thing too - all I did to couped is just making adjustments in: (Correct me if I am wrong)

Downstop (F6/R4 to F5/R4)
Springs (Softer in low med)
Diff oil (less vicosity from 7000 -> 5000 -> 3000)
Ride Heights (Higher in low-med(F4.8/R5.2 to F5.2/R5.6)

IMHO getting a front diff (on asphalt) makes running kind of difficult to drive in my previous days running a TRF419

Last edited by otaku521; 02-20-2016 at 07:33 AM.
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Old 02-20-2016, 12:20 PM   #537
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Originally Posted by otaku521 View Post
my home track (Asphalt) is also the same thing too - all I did to couped is just making adjustments in: (Correct me if I am wrong)

Downstop (F6/R4 to F5/R4)
Springs (Softer in low med)
Diff oil (less vicosity from 7000 -> 5000 -> 3000)
Ride Heights (Higher in low-med(F4.8/R5.2 to F5.2/R5.6)

IMHO getting a front diff (on asphalt) makes running kind of difficult to drive in my previous days running a TRF419
Just finished building the chassis, build quality is no-match as always, tho there are sill a few minor improvement needed for the instructions.

Anyways, cant wait to try out the new car, and thanks for your input, will probably try your setup as well if the stock setting is not fit. have fun~
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Old 02-20-2016, 09:51 PM   #538
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built mine box stock and put it down for the first time tonight.. its a little too tail happy for me lol. but i will bring it back into line with how i like it. weight bias seems to be toward the rear. so i might start by pushing the arms back, taking out a bunch of droop.

I put in all the screws as well. atm its a little sensitive in the on/off throttle transistion. but it is smooth.. picks up speed very nicely. very reponsive... I imagine by next saturday ill be killing my R2s laptimes.
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Old 02-21-2016, 02:32 AM   #539
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Just finished building the T4'16 which is my first Xray since the T3'11. Really nice build, particularly the shocks. Hopefully I'll get to have a shakedown this week

Quote:
Originally Posted by yifuqiao View Post
Appreciated the feedback, man.
Lol, I guess I should start saving for m12s then.
I am currently using m11x, while it is way better than my previous GT3B, but I feel like it is outdated after trying my friend's m12s.
But I will keep driving like this though, I have only had the car for 2 weeks.
Radio is gonna be an upgrade , but it is probably not bottom neck right now.
Could you tell me what you found could have been improved for your driving style? I know it may not work for me, but I would like some inspiration.
Seriously? M11x is fine. The improvement in going to m12 will be negligible. Save your money and do more practice.
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Old 02-21-2016, 02:34 AM   #540
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Does anyone experience uneven rear toes?
I found that the difference between my rear toes is like 1 degree , and this is checked on setup station.
I loosed every related screws and retight them, still couldn't get even toes.
My current solution is using different toe inserts on left and right... And it matched perfectly on setup station..
The difference between left inserts and right inserts is right on 1 .
This makes me thing it could be part defect ...

It kind of bothers me.
My friend told me he remembered the older X-ray had the similar issue..
This is my first X-ray, so I am not sure if my problem is normal or not.
Tbh, when the car was freshly built, I noticed this problem already, but I thought it was because i didn't right screws correctly , or chassis was tweaked.
I don't think I bent any pins, but I will check .
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