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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 03-10-2016, 11:06 AM   #616
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Quote:
Originally Posted by dr_hfuhuhurr View Post
Any idea when the Brass pieces will be in-stock?
Part number Description Expected in stock in
#302711 Brass Front Lower 1-Piece Suspension Holder - Front - FF Available

Supposedly in stock according to Xray Slovakia
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Old 03-10-2016, 12:22 PM   #617
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Originally Posted by Brian Bosley View Post
Part number Description Expected in stock in
#302711 Brass Front Lower 1-Piece Suspension Holder - Front - FF Available

Supposedly in stock according to Xray Slovakia
Not quite available stateside yet. Wait a couple weeks.
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Old 03-13-2016, 07:53 PM   #618
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Quote:
Originally Posted by dr_hfuhuhurr View Post
Any idea when the Brass pieces will be in-stock?
the border has them in stock
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Old 03-16-2016, 10:09 AM   #619
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Default Diffs High?/Low?

Does any know if there is a document posted somewhere that describes the benefits/issues with running diffs high or low?

Thanks,
Oliver
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Old 03-16-2016, 10:14 AM   #620
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Originally Posted by DOTMAN View Post
Does any know if there is a document posted somewhere that describes the benefits/issues with running diffs high or low?

Thanks,
Oliver
Page 11 from the T4'16 manual has it.
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Old 03-16-2016, 10:28 AM   #621
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Thanks, I missed that.

I'm not sure i understand though. Front diff up provides better steering but less front traction Can someone explain that a little better?
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Old 03-16-2016, 10:38 AM   #622
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Can anyone share me your experience with the xray flex alum chassis and xray non-cut alum chassis?
I saw xray drivers use both, but it seems to me , mod is running flex and lower power cars run regular alum .
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Old 03-18-2016, 01:06 PM   #623
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Default PSS dimensions

Does anyone know the dimensions of the PSS cylinder?.
Basically the length and the outer diameter.

I want to check if it fits my non-Xray big-bore shocks.

Or if anyone has the inner bore and inner length of the shock housing for the Xray shocks that would also be nice.

Thanks in advance!
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Old 03-18-2016, 06:05 PM   #624
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Originally Posted by DOTMAN View Post
Thanks, I missed that.

I'm not sure i understand though. Front diff up provides better steering but less front traction Can someone explain that a little better?
Traction doesn't necessarily mean steering.

The diff up basically adds a bit more roll in the front (due to CG stuff) which can add steering, because the car will carry more corner speed on higher traction levels.

You can have so much front traction that the car feels like it is coming to a stop or getting pushy.
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Old 03-18-2016, 06:10 PM   #625
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I thinl it is one pf the "smaller" changes to make, thougb. I'd be more concerned that the belt tension is correct, since it's unlikely you could safely try the diff in both the highest and lowest positions without the belt getting annihilated.
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Old 03-18-2016, 10:16 PM   #626
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Quote:
Originally Posted by DS Motorsport View Post
Does anyone know the dimensions of the PSS cylinder?.
Basically the length and the outer diameter.

Thanks in advance!

Length: 13.96 outer diameter: 11.20 (give or take .01 - .03)
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Old 03-20-2016, 03:08 AM   #627
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Spool in the high position is more responsive, less mid corner steering

Quote:
Originally Posted by cwoods34 View Post
I thinl it is one pf the "smaller" changes to make, thougb. I'd be more concerned that the belt tension is correct, since it's unlikely you could safely try the diff in both the highest and lowest positions without the belt getting annihilated.
huh? belt tension is the same up or down. There is adjustment via the cams in both high and low positions.
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Old 03-20-2016, 10:11 AM   #628
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What he means is that you might have to readjust the belt tension when moving from low to high or viceversa, just to make sure it‘s not overstretched.
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Old 03-20-2016, 01:50 PM   #629
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Quote:
Originally Posted by CraigM View Post
Spool in the high position is more responsive, less mid corner steering


huh? belt tension is the same up or down. There is adjustment via the cams in both high and low positions.
I meant the highest and lowest possible positions. It seems rare (to me at least) that I've ever had proper belt tension with the diff either fully up or down, and the more towards the middle the proper cam setting is, the less noticeable going "up or down" is, to the point that many guys probably don't care to mess with it.
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Old 03-20-2016, 01:53 PM   #630
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It's also even less noticeable with a spool due to the difference in weight compared to a gear diff.
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