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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 10-23-2016, 02:39 AM   #1036
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Hi guys a quick question i run on asphalt and have always run the diff and spool in my t4 16 in the up position what is the benefit of running them in the down position ?
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Old 10-23-2016, 02:47 AM   #1037
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Can anyone suggest good ecs 52mm for the t4 16 other then the originals?
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Old 10-23-2016, 02:50 AM   #1038
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Originally Posted by TypeR01 View Post
Can anyone suggest good ecs 52mm for the t4 16 other then the originals?
Radtec
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Old 10-23-2016, 02:52 AM   #1039
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Legend thanks
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Old 10-23-2016, 02:54 AM   #1040
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Legend thanks
They do use 3mm bearings not 4mm, but tough as nails are also c clip style as well,
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Old 10-23-2016, 06:33 AM   #1041
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spec r also has for the t4 but I prefer to use radtec.
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Old 10-23-2016, 11:28 AM   #1042
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Well, anyone else write off an avid chassis? Did mine in today as well as their top deck after a questionable corner at the track bit a few others cars too, then came my turn. So, the hunt for a chassis rhats in stock is on.
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Old 10-23-2016, 11:52 AM   #1043
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Originally Posted by Boostinswifty38 View Post
Well, anyone else write off an avid chassis? Did mine in today as well as their top deck after a questionable corner at the track bit a few others cars too, then came my turn. So, the hunt for a chassis rhats in stock is on.
If you are looking for and aluminum chassis I have one that is brand new
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Old 10-23-2016, 11:55 AM   #1044
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Pm me pics andcost please
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Old 10-23-2016, 10:43 PM   #1045
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Quote:
Originally Posted by TypeR01 View Post
Hi guys a quick question i run on asphalt and have always run the diff and spool in my t4 16 in the up position what is the benefit of running them in the down position ?
Up tends to give more steering, and make the car more free, and better corner speed.
Low gives more traction, and make the car a little easier to drive, but can stop in the corner.

It's worth having an experiment yourself, makes a decent bit of difference, and not a difficult change to make.

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Old 10-24-2016, 01:16 PM   #1046
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iam bulding the new t4

but the rear diff its not really free on one point
do you guys run it and free up after some runs

or do you make some modifiction on the diff
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Old 10-24-2016, 01:20 PM   #1047
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Quote:
Originally Posted by truggy100 View Post
iam bulding the new t4

but the rear diff its not really free on one point
do you guys run it and free up after some runs

or do you make some modifiction on the diff
Make sure to look for flashing on the ends of the cross that holds the idler gears. That must go into the case nice and smooth. Also, make sure the case ends are aligned correctly.
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Old 10-24-2016, 01:21 PM   #1048
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Originally Posted by truggy100 View Post
iam bulding the new t4

but the rear diff its not really free on one point
do you guys run it and free up after some runs

or do you make some modifiction on the diff
When building a new diff I always make sure to trim off all excess plastic (from the mold) and sand the flat surfaces of all the gears. I then assemble the diff dry (without the screws mind you) and turn it to make sure it feels free. If there are any small bumps or issues I take it apart and see if I can see where the issue is. If it isn't obvious I go ahead and assemble with my oil and run it in a few packs, then take disassemble it, clean it and rebuild it. It is always smooth after that point.
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Old 10-24-2016, 01:34 PM   #1049
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you shouldn't have to make any modifications for the diff to operate smoothly.

Did you remove the burrs from the gears when you cut them from the plastic form? double check to make sure the gears are perfectly smooth around the edges.

if there is a very minor point of resistance when spinning the diff, it will likely smoothen out with use, but if it feels significant - id go back in and check to see that all the gears are free of burrs.
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Last edited by wkderf; 10-24-2016 at 05:39 PM.
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Old 11-07-2016, 08:16 AM   #1050
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This isn't really T4 specific but I am just getting into onroad with a T4 and I am wondering if someone can recommend a decent lipo to use for 17.5 onroad. I was looking at promatch and SMC. Ive had Orcas that I used in offroad and I didn't have much luck with them. Thanks.
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