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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 09-10-2016, 11:05 PM   #961
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Hi All,

Strange thing has happened twice in last week. Running 17.5 on asphalt track...notice weird pulling, lack of rotation. Only incident I remember happening is glancing track edge railing with left side of car....but I do this all the time Pulled the car and saw that the right rear eccentric bearing/diff holder had hopped out of its notch and was up inbetween settings. Upper bulkhead clamps fully secured. Has anyone had this happen....at theories?

Thanks!
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Old 09-10-2016, 11:39 PM   #962
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if you were on the throttle when you hit the side of the track, the torque & momentum of the motor could have been strong enough to pull the diff out of position.

surprised to hear the upper bulkhead screws were all fully tight though.

are you sure the eccentric bearing / diff holder wasn't damaged prior to the event? it could have been damaged or improperly seated during the initial install.
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Old 09-11-2016, 07:37 PM   #963
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Will inspect bulkheads again, but I was sure to double check seating after the first incident. I think best guess would be the jolt to that left side...locking up left half of diff and popping up right. Really weird, as I've hit plenty of things with the car...but never had this happen.

Our new track is also the only place where my front belt has popped off...that's probably when I hit the front left axle!
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Old 09-11-2016, 09:22 PM   #964
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Hi Guys, report back on progress with the changes made as previously advised. Had quite the productive day trying various subtle changes to further aid the front down and out pill settings. Quick summary is I started the day off where I left off with the standard kit settings and by the end of the day, I improved my personal best time by 0,3 secs. Initially the car went well without the layshaft screws as the grip levels improved the car wasnt as consistent, I then reinstalled layshaft screws and the car was planted. Didnt like the softer sway bars, actually took away steering. The changes made improved overall steering but not enough as yet, will remove the anti dive, which should add back the lost caster, hopefully it will give me the extra 0.3 sec a lap I'm looking for. Thanks for the advise, it certainly helped!.
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Old 09-15-2016, 05:47 AM   #965
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anyone using SMJ springs on their T4?
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Old 09-15-2016, 06:06 AM   #966
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Quote:
Originally Posted by Set View Post
anyone using SMJ springs on their T4?
Quite a few people, and a lot of drivers, both team and privateers were experimenting with them at the worlds
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Old 09-15-2016, 07:42 AM   #967
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I thought you used them Damian , I did notice that a lot seemed to be using the 3.2 pinks at the world's, Tamiya's, Xray's and Yokomo's. I tried the progressive springs around Bedworth but wasn't impressed, don't usually get on very well with really progressive springs
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Old 09-16-2016, 01:31 AM   #968
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Quote:
Originally Posted by Set View Post
anyone using SMJ springs on their T4?
a few of the xray racers (privateers) used it for 17.5 T blinky and 13.5 T for TITC in Feb, including me.

After using them, bought 2 sets of each color, except for gold (hardest) as our grip at our local track doesnt get that high as in Bangkok. Never used any other springs, really happy with them. I use silver all around for our local track, medium grip.
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Old 09-16-2016, 03:43 AM   #969
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Quote:
Originally Posted by alecladanga View Post
a few of the xray racers (privateers) used it for 17.5 T blinky and 13.5 T for TITC in Feb, including me.

After using them, bought 2 sets of each color, except for gold (hardest) as our grip at our local track doesnt get that high as in Bangkok. Never used any other springs, really happy with them. I use silver all around for our local track, medium grip.
I've used the silvers and pinks a bit.. quite like the feeling against the xray 2.7s.
SMJ Silvers are a hare softer, and pinks a bit harder than the 2.7s, but feel quite different on track.
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Old 09-16-2016, 01:39 PM   #970
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Quote:
Originally Posted by TryHard View Post
I've used the silvers and pinks a bit.. quite like the feeling against the xray 2.7s.
SMJ Silvers are a hare softer, and pinks a bit harder than the 2.7s, but feel quite different on track.
Interested in trying some of the SMJ 3.2 Pinks, my go-to spring is the Xray 2.7. What's the different handling characteristics between the two outdoors, do they ride the bumps better, give more traction or just make the car easier to drive?
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Old 09-16-2016, 02:52 PM   #971
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Quote:
Originally Posted by Bar View Post
Interested in trying some of the SMJ 3.2 Pinks, my go-to spring is the Xray 2.7. What's the different handling characteristics between the two outdoors, do they ride the bumps better, give more traction or just make the car easier to drive?
I've found they seem a little more smoother to drive, like there are slightly progressive. I think thats more a factor of wire material than coil counts. Personally, I prefer the silvers over the Pinks.
Pink seems better with higher traction, certainly not something I get to race a lot on!
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Old 09-22-2016, 05:07 AM   #972
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Hi Guys, can someone please tell me if its worth getting / trying the floating steering?. Will it be beneficial on an outdoor asphalt track, bumpy?. What does it help with or not?. Thanks in advance
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Old 09-22-2016, 05:25 AM   #973
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Quote:
Originally Posted by rcdreamer View Post
Hi Guys, can someone please tell me if its worth getting / trying the floating steering?. Will it be beneficial on an outdoor asphalt track, bumpy?. What does it help with or not?. Thanks in advance
It really is one of those parts where the only way to find out is to test back to back. I know some drivers have tried it outdoors and didn't like it.
I can't tell much difference between the two, but I have found that on some tracks I've managed to gain 0.1 just by using it.

Only takes a couple of minutes to change so pretty easy to test back to back against standard steering.
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Old 09-22-2016, 06:46 AM   #974
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Quote:
Originally Posted by TryHard View Post
I've found they seem a little more smoother to drive, like there are slightly progressive. I think thats more a factor of wire material than coil counts. Personally, I prefer the silvers over the Pinks.
Pink seems better with higher traction, certainly not something I get to race a lot on!
+1 on everything, I also use the pinks when the grip is high, but default is silver.
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Old 09-22-2016, 10:18 AM   #975
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Default Using hard or soft springs to gain more traction

Hi guys

My local track is of low traction type. In general, should one be using harder or softer springs to gain more traction on a low grip outdoor track? Currently, I'm using XRay progressive springs of 2.5-2.8 in front and 2.6 at my rear. Look forward to your advice and thank you.
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