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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 05-08-2016, 07:25 AM   #736
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subscribing
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Old 05-08-2016, 07:27 AM   #737
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Originally Posted by R Dodge View Post
If you're on Facebook, I'd recommend checking out Tim Wahl's page. He posted some very helpful build tips for the entire build process that goes above and beyond the kit instructions & explains why he does those things. You don't have to do all of those things for the car to perform great, but most of them make it easier to tune and enjoy the car. Most of these tips really would be helpful for any brand of car. He also lists the option parts that he prefers which I mostly agree with. However, as you've heard they aren't all necessary right out of the box.
Thanks for the info. When you said "they aren't all necessary right out of the box", do you mean that XRay T4 2016 out-of-the-box's stock parts are not really that "legendary perfect" in a way which some of the stock parts do really need to be changed in order to achieve a real "top-tier" competitive car?
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Old 05-08-2016, 08:16 AM   #738
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compared to an ARC R11 how do you stack this chassis up?

Are they about equal?
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Old 05-08-2016, 08:42 AM   #739
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Originally Posted by Kakaru View Post
Thanks for the info. When you said "they aren't all necessary right out of the box", do you mean that XRay T4 2016 out-of-the-box's stock parts are not really that "legendary perfect" in a way which some of the stock parts do really need to be changed in order to achieve a real "top-tier" competitive car?
Well some of the option parts do perform better in different conditions. The car is plenty capable out of the box though. Xray is really well known for quality of materials as well as fit and finish, which is true for the kit as it comes in the box or if you add Xray option parts. For instance, you might consider picking up the graphite arms. The car will be fast without them, but if you're running on a very hot day outside, or on very high bite carpet you may prefer them.
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Old 05-08-2016, 08:44 AM   #740
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compared to an ARC R11 how do you stack this chassis up?

Are they about equal?
I've never run the ARC or even built one, but I've heard from a guy who has owned and raced both that it is pretty good.
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Old 05-08-2016, 11:34 AM   #741
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Haven't heard much but usually the new model starts making its way to the public around October.
Had all chat w bruno
he told me :

Nop...no point to wait...for sure next year we have new model but only change small details
That you can buy and convert in new car.
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Old 05-08-2016, 12:54 PM   #742
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the fast local guys are running them on asphat and winning.

I like the Xray too especially that you can buy those weighed front and rear toe mounts.
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Old 05-08-2016, 02:01 PM   #743
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I should think if there are any significant updates, we'd see them at the worlds in Beijing in August
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Old 05-08-2016, 03:42 PM   #744
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R Dodge, I'm about to start racing outside with a T4 2016 that I picked up from a friend and I'd like to know a good starting setup to begin with. I'll be racing at a parking lot track in Glenn Burnie where I hear they have anywhere from 7 or 8 National Champs there every weekend. Do you have any suggestions?
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Old 05-08-2016, 08:09 PM   #745
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I should think if there are any significant updates, we'd see them at the worlds in Beijing in August
Yep.

They might also run some high grip ashphalt specific prototype parts to suit specifics of the race and they might not turn into part numbers as well.

We could see things like new rear uprights perhaps seeing as everyone run minimum 2-3mm (and more often than not 4mm) shims in the back end. Raise it by 2mm and its a new part!

The car is the best overall out there. It doesn't need "changes" we might see some tweaks though. Something like the floating steering servo mount might become standard, remove the need for Xray to produce both. Unlikely though. Option parts make money.

Can almost guarantee the top and bottom decks will get some tweaks and be slightly different.

Only thing that would be nice to see, in my opinion, is keying to the bulkheads to help prevent tweak plus a different method to adjust belt tension. One like VBC that doesn't need clamp removal would be good.

Would also be good to have an easier method of changing spurs too, but the motor mount flex relies on symmetry with regards to the mounting hard points, so this can't easily change.

Also would mind seeing some more research into the avid style top deck stiffness adjustment. The x brace is cool and means you wouldn't need to carry different thickness topdecks and could change this fast. Again, loss of option part $$

HB/TRF style camber link adjustment could also be an easy one to introduce, as would Yokomo/TRF style battery tape mounts.
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Old 05-09-2016, 03:54 AM   #746
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Originally Posted by The Teacher View Post
R Dodge, I'm about to start racing outside with a T4 2016 that I picked up from a friend and I'd like to know a good starting setup to begin with. I'll be racing at a parking lot track in Glenn Burnie where I hear they have anywhere from 7 or 8 National Champs there every weekend. Do you have any suggestions?
Hi Teacher,

Glad to hear you're back with an orange car and coming back to JMR to race at the Parking Lot Nationals. I've only been once this year, but my setup was pretty solid. I started with the kit setup and made a few changes to find some more steering. I played around with different sauces but LG1 and LG2 are very popular there. Can't go wrong having some FX2 on hand too. Feel free to ask if you have any questions. I think Craig will be starting with something similar, and Jenkins isn't very far from this setup either.

http://forum.teamxray.com/xform/inde...&setup=t4_2016
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Old 05-09-2016, 02:51 PM   #747
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Arrow 64 pitch - what Spur #

Hi guys, I'm currently building my T4'16 and was wondering....

Kit comes with 48pitch #84 teeth, but I would like to run 64pitch.

What would be more or less the equivalent size (same diameter for example) for a 64pitch Spur that I should buy? Read somewhere else (as a rule of thumb) to divide 48pitch by 0.75 to get the approx. 64pitch Spur. For example, (84/ 0.75) = 112 teeth. Is that reasonable? Will it fit into my T4? My target FDR is between 5.0 - 5.5
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Old 05-09-2016, 03:20 PM   #748
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Your maths is spot on.

But you don't want 112. That's morefor mod

For mid 5's you want more like 96-104

104 with a 36T pinion is 5.49
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Old 05-09-2016, 03:26 PM   #749
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The math is correct (48/64=0.75). So 112T in 64dp should be the same size as your 84T in 48dp.

Generally for lower FDRs in touring cars, people mostly use smaller spurs than that though, e.g. like a 104T or 106T (it can get difficult to get large pinions and large spurs together, since the motor can only be moved a limited distance.)
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Old 05-09-2016, 03:29 PM   #750
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Your maths is spot on.

But you don't want 112. That's morefor mod

For mid 5's you want more like 96-104

104 with a 36T pinion is 5.49
Thanks CPLUS. I made a test with a #100 (and a 34 or 35 pinion) but there was not enough space between motor and upper deck. That's why I thought of looking for a bigger spur (but how much bigger?).
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