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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 08-30-2016, 03:48 AM   #931
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Quote:
Originally Posted by Troy Carter View Post
I've only ran a 4.5t but I would start a 5.5t at 7.6fdr and adjust as needed based on your motor. This assumes you will be running boost/turbo.
That's more like 4.5t gearing
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Old 08-30-2016, 04:21 AM   #932
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Do Xray T4 range have bearing type anti roll bars (like VBC) or sleeve type.
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Old 08-30-2016, 04:39 AM   #933
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Bearing type was introduced on the 2015 version if I'm not mistaken.
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Old 08-30-2016, 05:23 AM   #934
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Originally Posted by Skiddins View Post
That's more like 4.5t gearing
It is my 4.5t gearing but it's also where I would start a 5.5 and adjust from there.

Is there a better starting point for him?
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Old 08-30-2016, 05:29 AM   #935
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Quote:
Originally Posted by Troy Carter View Post
It is my 4.5t gearing but it's also where I would start a 5.5 and adjust from there.

Is there a better starting point for him?
Perhaps go up one pinion. This is based on boosted Mod as well.
More like 7.0 if running it in blinky.
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Old 09-04-2016, 06:24 PM   #936
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I believe Xray makes a wide bumper. If so, how much wider is the bumper and what is the part number?
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Old 09-04-2016, 06:46 PM   #937
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I believe Xray makes a wide bumper. If so, how much wider is the bumper and what is the part number?
They make a plastic lower bumper that is the same size as the foam bumper and goes under it. Its really large. You'll have to search it on their site to find the part number.

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Old 09-04-2016, 06:47 PM   #938
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Quote:
Originally Posted by SouthFloridaApp View Post
I believe Xray makes a wide bumper. If so, how much wider is the bumper and what is the part number?
Hmm... I have't seen that, only the impact resistant and the graphite one. Interesting to see if anyone else has seen a wider bumper.
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Old 09-04-2016, 07:59 PM   #939
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This is the part EA is talking about.

https://www.amainhobbies.com/xray-im...a301203/p22618
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Old 09-05-2016, 06:54 AM   #940
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I was referring to a wider foam bumper... Any thoughts?
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Old 09-05-2016, 07:26 AM   #941
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Originally Posted by SouthFloridaApp View Post
I was referring to a wider foam bumper... Any thoughts?
Do you mean wider from side to side, or wider meaning actually going further from the car ?
You don't want a wide (side to side bumper ) cause if you hit a board they bend down and scrub ground In the corners .
I really like the EAM bumpers cause they brace the body in a farward mounted body . and don't add much weight to the car vs stock one .
You need to keep in mind the heavier the front bumper the less potential steering you have ... On a proven setup anyone has add a heavier bumper and it will reduce steering to some degree depending on weight . I've always made my own bumpers to make contact with body properly @ about 8g stock was about 5g . the bsr is about 12g.
I've ran 3g bumpers and could feel the difference between them . 5-7g is my compromise between durability and performance.
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Old 09-05-2016, 07:31 AM   #942
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Originally Posted by jlfx car audio View Post
Do you mean wider from side to side, or wider meaning actually going further from the car ?
You don't want a wide (side to side bumper ) cause if you hit a board they bend down and scrub ground In the corners .
I really like the EAM bumpers cause they brace the body in a farward mounted body . and don't add much weight to the car vs stock one .
You need to keep in mind the heavier the front bumper the less potential steering you have ... On a proven setup anyone has add a heavier bumper and it will reduce steering to some degree depending on weight . I've always made my own bumpers to make contact with body properly @ about 8g stock was about 5g . the bsr is about 12g.
I've ran 3g bumpers and could feel the difference between them . 5-7g is my compromise between durability and performance.
OK, you mean the foam, sorry about that. I have been using the EA bumper since Reedy and it is great.
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Old 09-05-2016, 07:44 AM   #943
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What about using a wide foam bumper and dremeling the bottom edges in a contoured manner for more protection? I would rather have increased durability and find a way to get more steering via set-up. Hence, where can I find a wide foam bumper that will be a direct fit that I can experiment with?
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Old 09-05-2016, 07:56 AM   #944
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Originally Posted by SouthFloridaApp View Post
What about using a wide foam bumper and dremeling the bottom edges in a contoured manner for more protection? I would rather have increased durability and find a way to get more steering via set-up. Hence, where can I find a wide foam bumper that will be a direct fit that I can experiment with?
The widest foam bumper I've seen is the heavy BSR bumper sold by Awesomatix usa.com you could drill it to cut down On some weight it's really hard so you probably would have the best luck with one of these
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Old 09-05-2016, 08:21 AM   #945
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Originally Posted by jlfx car audio View Post
The widest foam bumper I've seen is the heavy BSR bumper sold by Awesomatix usa.com you could drill it to cut down On some weight it's really hard so you probably would have the best luck with one of these
Do you know if this is the same thickness?
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