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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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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 04-07-2016, 05:37 PM   #691
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orca 6200mah batteries are about perfect for side/side with my hobbywing/trinity stuff.
with stock chassis i had to add 50ish grams but the hard aluminum is over weight.
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Old 04-09-2016, 06:04 AM   #692
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Default Driveline Drag

Driveline drag ? If I just have the front, center and rear sections on the car they spin freely once I hook up the belts on I start getting drag. Front not so bad but when I attach the rear belt the driveline drag (doesn't free wheel) get worse. This is without the front and rear shafts attached. T3, belts are not over tightened, all 6 bearings have been cleaned and oiled (twice). Any ideas why the driveline is dragging or is this normal ??
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Old 04-09-2016, 07:20 AM   #693
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I just ordered the 2016 kit after owning my 2015 kit for a couple weeks, have you guys noticed a clear difference between white belts and the kit ones?
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Old 04-09-2016, 07:49 AM   #694
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The biggest difference I've found with the white belts is a lot less build up of junk in the pullies and on the belts themselves compared to the stock ones.
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Old 04-09-2016, 09:12 AM   #695
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Quote:
Originally Posted by Ralph289 View Post
Driveline drag ? If I just have the front, center and rear sections on the car they spin freely once I hook up the belts on I start getting drag. Front not so bad but when I attach the rear belt the driveline drag (doesn't free wheel) get worse. This is without the front and rear shafts attached. T3, belts are not over tightened, all 6 bearings have been cleaned and oiled (twice). Any ideas why the driveline is dragging or is this normal ??
No Help anyone ??
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Old 04-09-2016, 10:27 AM   #696
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Quote:
Originally Posted by Ralph289 View Post
No Help anyone ??
Its normal.
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Old 04-14-2016, 11:50 AM   #697
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A little off topic. But does anyone have any setup sheets for vta? I'm running on a low grip carpet track that is relatively small. I think I'm close with the silver progressive springs up front and 2.3 on rear but still feels a little twitchy
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Old 04-14-2016, 03:08 PM   #698
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Quote:
Originally Posted by Ralph289 View Post
Driveline drag ? If I just have the front, center and rear sections on the car they spin freely once I hook up the belts on I start getting drag. Front not so bad but when I attach the rear belt the driveline drag (doesn't free wheel) get worse. This is without the front and rear shafts attached. T3, belts are not over tightened, all 6 bearings have been cleaned and oiled (twice). Any ideas why the driveline is dragging or is this normal ??
It's normal to have drag, it's just the nature of a belt system. Only thing you can do is ensure you have the diff positions set correctly to allow slack in the belts but not be so loose as to cause skipping.
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Old 04-15-2016, 02:32 AM   #699
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Quote:
Originally Posted by ryanb91 View Post
A little off topic. But does anyone have any setup sheets for vta? I'm running on a low grip carpet track that is relatively small. I think I'm close with the silver progressive springs up front and 2.3 on rear but still feels a little twitchy
Could you post your setup so we can see it and make some suggestions? I think I would suggest going back to 2.5 on the rear, but it depends on how much chassis roll you have. With how heavy VTA cars have to be, I'd think 2.3 is too soft and causing some oversteer. Also it is extremely important to make sure the tires are dry before you put the car down. I mean make sure you really put effort into getting all the excess compound out from between the treads.
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Old 04-15-2016, 04:48 AM   #700
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Quote:
Originally Posted by R Dodge View Post
Could you post your setup so we can see it and make some suggestions? I think I would suggest going back to 2.5 on the rear, but it depends on how much chassis roll you have. With how heavy VTA cars have to be, I'd think 2.3 is too soft and causing some oversteer. Also it is extremely important to make sure the tires are dry before you put the car down. I mean make sure you really put effort into getting all the excess compound out from between the treads.
thanks! looking for the same info.
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Old 04-26-2016, 07:29 PM   #701
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this one is on my next list
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Old 04-26-2016, 07:54 PM   #702
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I've found that I have some play in the 20T fixed pulley. It appears to be on both halves, and the play is where the pulley mates to the pin. My pulley isn't very old, and I have rotated it 90 degrees so that the pin slips into the previously unused grooves and it is better, but still has some slop. Is this normal? I know other cars have a different design and do not have any slop.
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Old 04-26-2016, 08:08 PM   #703
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I've found that I have some play in the 20T fixed pulley. It appears to be on both halves, and the play is where the pulley mates to the pin. My pulley isn't very old, and I have rotated it 90 degrees so that the pin slips into the previously unused grooves and it is better, but still has some slop. Is this normal? I know other cars have a different design and do not have any slop.
My 3 month old t4 16 does the same thing, however, I don't think it affected performance.

Being designed this way, I bet every t4 owner is experiencing the same thing.
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Old 04-26-2016, 10:08 PM   #704
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Hi, I have a 2016 T4 and try to install the aluminum steering Arm but after installed, the steering ball joint will hit the belt ? So I took it out and try to see what's the difference of the plastic arm, it seem the plastic arm is sit more higher than the aluminum arm. Do you guys have this problem ? Did you guys just leave it like this or how can it be fix . Thx
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Old 04-26-2016, 10:12 PM   #705
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Shim your servo mount up a half mm or so. Just the plate not the servo itself. Otherwise maybe file the studs a little bit. He belt will expand on power so i doubt it hits the steering often if at all.
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