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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 11-03-2015, 05:27 PM   #226
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Thanks
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Old 11-03-2015, 07:42 PM   #227
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FWIW I'm assuming you know this but in case you don't, you can tighten the belts, there just isn't a center post style tensioner...you have to rotate the diff/spool to tighten them. I'm running 13.5 and opted for the low friction white belts. After a few packs, I had to tighten the the front belt 1 notch and it was plenty tight. After tightening, no slippage issues whatsoever.
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Old 11-03-2015, 07:44 PM   #228
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Originally Posted by erchn View Post
1.9



Just use a 3mm wrench to remove the ball and all from the set screw, works just fine.


Some do, some don't. Certainly not required, but it doesn't hurt.



Get the RSD bumper or the XRAY hard bumper they came out with recently, it's pretty good also.
I bought the hard bumper after getting my kit... Rediculously hard...they need a medium...
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Old 11-03-2015, 07:47 PM   #229
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I bought the hard bumper after getting my kit... Rediculously hard...they need a medium...
RSD ftw!
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Old 11-03-2015, 08:58 PM   #230
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Originally Posted by 3D-Seth View Post
FWIW I'm assuming you know this but in case you don't, you can tighten the belts, there just isn't a center post style tensioner...you have to rotate the diff/spool to tighten them. I'm running 13.5 and opted for the low friction white belts. After a few packs, I had to tighten the the front belt 1 notch and it was plenty tight. After tightening, no slippage issues whatsoever.
Yep got that one and knew about that. Weird just all my other ones came with it standard.
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Old 11-05-2015, 02:50 AM   #231
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Originally Posted by 3D-Seth View Post
FWIW I'm assuming you know this but in case you don't, you can tighten the belts, there just isn't a center post style tensioner...you have to rotate the diff/spool to tighten them. I'm running 13.5 and opted for the low friction white belts. After a few packs, I had to tighten the the front belt 1 notch and it was plenty tight. After tightening, no slippage issues whatsoever.
Rear belt needs to be pretty tight. I left mine slightly loose as accustomed to do with other cars and it started slipping. In just a few runs I had to change it.
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Old 11-05-2015, 04:32 AM   #232
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Rear belt needs to be pretty tight. I left mine slightly loose as accustomed to do with other cars and it started slipping. In just a few runs I had to change it.
Which belt are you using (white or black)? What notch do you have the diff eccentric in?

Personally I run the white belts with the rear diff 1 notch off of center so that it's looser. This seems to be a good setting to keep the rear belt loose without skipping when using the white ones. I'm not sure how loose you can run the rear belt on other cars, but to me this seems good on the T4.
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Old 11-05-2015, 08:10 AM   #233
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Which belt are you using (white or black)? What notch do you have the diff eccentric in?

Personally I run the white belts with the rear diff 1 notch off of center so that it's looser. This seems to be a good setting to keep the rear belt loose without skipping when using the white ones. I'm not sure how loose you can run the rear belt on other cars, but to me this seems good on the T4.
I ran the kit belts and rear is exactly in the centre notch with diff in low position.
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Old 11-05-2015, 08:27 AM   #234
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I ran the kit belts and rear is exactly in the centre notch with diff in low position.
Well I admit it's been a long time since I've used black belts, so I'm not certain how they compare to the white belts as far as tension goes. I'd imagine they'd be pretty similar so you could probably get away with running it 1 notch looser, though I also imagine you've probably tried that already.

Just doesn't sound right that the rear belt needs to be tight. It should have some give in it and still drive properly.
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Old 11-05-2015, 08:35 AM   #235
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Well I admit it's been a long time since I've used black belts, so I'm not certain how they compare to the white belts as far as tension goes. I'd imagine they'd be pretty similar so you could probably get away with running it 1 notch looser, though I also imagine you've probably tried that already.

Just doesn't sound right that the rear belt needs to be tight. It should have some give in it and still drive properly.
The black belts where tighter on my car even after they were ran for a month, compared to the white belts.
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Old 11-05-2015, 09:00 AM   #236
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The one thing I found in the black vs white belts is the black belts tend to pick up a lot more junk vs the white belts... Which will eventually tighten things up after they work their way into the pullies.
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Old 11-05-2015, 10:50 AM   #237
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Originally Posted by R Dodge View Post
Well I admit it's been a long time since I've used black belts, so I'm not certain how they compare to the white belts as far as tension goes. I'd imagine they'd be pretty similar so you could probably get away with running it 1 notch looser, though I also imagine you've probably tried that already.

Just doesn't sound right that the rear belt needs to be tight. It should have some give in it and still drive properly.
I'm running white belts. I installed the black belts first for reference, then the whites. Whites feel a little looser than the blacks with the diffs in the same positions. I had some slippage with the front white belt after a couple packs, so tightened it one notch from center. Rear belt is in the center (down) position still. No issues here so far. I'm running 13.5 blinky at my track, so can probably run my belts a little looser than the mod guys. Racing this weekend, so going to try running the rear a notch looser if I can. I'll report back if any issues.

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Old 11-05-2015, 11:23 AM   #238
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Originally Posted by 3D-Seth View Post
I'm running white belts. I installed the black belts first for reference, then the whites. Whites feel a little looser than the blacks with the diffs in the same positions. I had some slippage with the front white belt after a couple packs, so tightened it one notch from center. Rear belt is in the center (down) position still. No issues here so far. I'm running 13.5 blinky at my track, so can probably run my belts a little looser than the mod guys. Racing this weekend, so going to try running the rear a notch looser if I can. I'll report back if any issues.

Seth

Yep, I agree the whites definitely do have a break-in period & can be tightened after a few runs unless you started out in the eventual sweet spot.
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Old 11-05-2015, 04:54 PM   #239
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Old 11-06-2015, 02:40 AM   #240
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Quote:
Originally Posted by 3D-Seth View Post
I'm running white belts. I installed the black belts first for reference, then the whites. Whites feel a little looser than the blacks with the diffs in the same positions. I had some slippage with the front white belt after a couple packs, so tightened it one notch from center. Rear belt is in the center (down) position still. No issues here so far. I'm running 13.5 blinky at my track, so can probably run my belts a little looser than the mod guys. Racing this weekend, so going to try running the rear a notch looser if I can. I'll report back if any issues.

Seth
The white belts are softer than the black stock belts and get loose after break in. Perhaps this was a one off thing, could be also due to some stone chip. I have installed a black belt once more. Will update you if I experience this issue again. I will leave it slightly loose not to have any binding. Thanks for your feedback.
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