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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 02-02-2016, 10:19 AM   #421
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Great thanks just ordered a couple.
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Old 02-02-2016, 03:05 PM   #422
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Default Xray T4'15 for sale

great fast car for sale many upgrades and custom body
Xray T4 '15 great pkg
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Old 02-02-2016, 03:08 PM   #423
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Quote:
Originally Posted by Donny Banks View Post
great fast car for sale many upgrades and custom body
Xray T4 '15 great pkg
Damn!
I just placed my order on a 2016 yesterday after seeing nothing like these were on sale, and it is shipped....
I like buying cars with a lot of spares.
On the bright side, I am officially an X-ray owner now.
GLWS.
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Old 02-02-2016, 10:54 PM   #424
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Default Rear fish tailing

Me again,

The rear end of my T4 fish tails on power carpet track. I tried a few things.....

-Dropped the shock oil to 30 in rear 40 in front
-2.5 spring in front and 2.3 in rear
-new sorex 28r tires
-increased the rear toe into the max
-shocks rear second hole from the inside. Front second last hole from the outside.
-centrical bushings on front is -5 in
- rear camber -1
-sauce the rear full and half front

The only adjustment I have yet to try is a thicker diff oil. Using 2000 right now.
Is it possible that this would do anything??? I don't really understand the diff operation. Is there anything else it could be?
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Old 02-02-2016, 11:05 PM   #425
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Quote:
Originally Posted by Rcracing01 View Post
Me again,

The rear end of my T4 fish tails on power carpet track. I tried a few things.....

-Dropped the shock oil to 30 in rear 40 in front
-2.5 spring in front and 2.3 in rear
-new sorex 28r tires
-increased the rear toe into the max
-shocks rear second hole from the inside. Front second last hole from the outside.
-centrical bushings on front is -5 in
- rear camber -1
-sauce the rear full and half front

The only adjustment I have yet to try is a thicker diff oil. Using 2000 right now.
Is it possible that this would do anything??? I don't really understand the diff operation. Is there anything else it could be?
What do you have up front? spool or diff? A front spool could easily cause some of the problems you are having
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Old 02-02-2016, 11:11 PM   #426
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Quote:
Originally Posted by Rcracing01 View Post
Me again,

The rear end of my T4 fish tails on power carpet track. I tried a few things.....

-Dropped the shock oil to 30 in rear 40 in front
-2.5 spring in front and 2.3 in rear
-new sorex 28r tires
-increased the rear toe into the max
-shocks rear second hole from the inside. Front second last hole from the outside.
-centrical bushings on front is -5 in
- rear camber -1
-sauce the rear full and half front

The only adjustment I have yet to try is a thicker diff oil. Using 2000 right now.
Is it possible that this would do anything??? I don't really understand the diff operation. Is there anything else it could be?
need to know your full setup to know for sure.
But when I had the same problem with my trf 419, what I did was
1. put the rear shock more inward(increase rear grip)
2. delete spacer on front chub(decrease negative camber gain through turns, so decrease front grip)
3. reduce front camber from -1.5 to -1.0(decrease front grip)

i think your rear camber is too high, shouldnt it be something like -2 degrees?(this increases rear grip)

Last edited by yifuqiao; 02-03-2016 at 12:13 AM.
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Old 02-03-2016, 12:06 AM   #427
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Default Fish tailing

Spool in the front.

I could try increasing the rear camber
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Old 02-03-2016, 05:08 AM   #428
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What motor and esc do you guys use for stock tc?
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Old 02-03-2016, 05:30 AM   #429
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Quote:
Originally Posted by mschumi101 View Post
Just my opinions/observations (in red). I'm sure others will weigh in too

How does it perform compare to BD7 on high bite carpet?
Personally can't comment, but I have read the Xray is better on carpet, about a wash with Yok on asphalt. For really high grip carpet the aluminum chassis is preferred (I believe the Yokomo can come with an aluminum chassis in the kit, whereas Xray is aftermarket only)
Sometimes, some statements just need to be challenged. We used to race the Xray T4-2015, switched to Yokomo BD7, now running the latest 2016 version.

Both cars a very good. Could you please link to where you have read the Xray is better than the BD7 on carpet? I do not mean one case, but multiple cases, from where you can deduct at positive trend in that statement.

Remember, you are providing advice to a lessor known.
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Last edited by Salkin; 02-03-2016 at 06:57 AM.
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Old 02-03-2016, 06:44 AM   #430
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Quote:
Originally Posted by Rcracing01 View Post
Me again,

The rear end of my T4 fish tails on power carpet track. I tried a few things.....

-Dropped the shock oil to 30 in rear 40 in front
-2.5 spring in front and 2.3 in rear
-new sorex 28r tires
-increased the rear toe into the max
-shocks rear second hole from the inside. Front second last hole from the outside.
-centrical bushings on front is -5 in
- rear camber -1
-sauce the rear full and half front

The only adjustment I have yet to try is a thicker diff oil. Using 2000 right now.
Is it possible that this would do anything??? I don't really understand the diff operation. Is there anything else it could be?
What are your ride height, droop, and roll center settings?

I've found that these are crucial settings to dial in how the car behaves.

Providing this information should net you some detailed suggestions.
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Old 02-03-2016, 08:06 AM   #431
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Quote:
Originally Posted by Salkin View Post
Sometimes, some statements just need to be challenged. We used to race the Xray T4-2015, switched to Yokomo BD7, now running the latest 2016 version.

Both cars a very good. Could you please link to where you have read the Xray is better than the BD7 on carpet? I do not mean one case, but multiple cases, from where you can deduct at positive trend in that statement.

Remember, you are providing advice to a lessor known.
He already qualified the statement by typing "From what I have read". Perhaps you could provide links back up your statement that both cars are "very good" since I have no idea who you are or your credentials? And even more points if the vague assessment of "very good" can be quantified among a range of drivers, not just the top guys who would do good with any car.
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Old 02-03-2016, 02:28 PM   #432
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Originally Posted by Chaz955i View Post
He already qualified the statement by typing "From what I have read". Perhaps you could provide links back up your statement that both cars are "very good" since I have no idea who you are or your credentials? And even more points if the vague assessment of "very good" can be quantified among a range of drivers, not just the top guys who would do good with any car.
Well, I don't believe that I have to provide links to prove that both cars are very good, they are beyond a doubt some of the top cars on the market. Maybe the best two right now. In my opinion, of course.

In my "neck of the woods" Xray is all dominant, we have ourselves raced Xray, so I very well know the performance of the Xray. In my local club the racers range from Xray factory driver to top level national drivers to the beginner.

To be diplomatic in an Xray thread, our change to the Yokomo has not left us slower, and especially the new 2016 BD7 has in our club and national races "turned heads". It is that good.

That's why I responded to the statement, that the Xray were better than the BD7 on carpet. I can myself find no evidence that this should be true. Neither through our personal use and experience, nor in RC forums etc.

I wanted to be respectful in an Xray thread, that's why I wrote that both cars are very good. And I truly believe that.

My credentials? On national level we are near or in the top (depending on class), on international level (ETS) we are in the middle of the pack. If that is of any use to you ?
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Old 02-03-2016, 03:04 PM   #433
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Didn't see too many bd7's standing on the podium down at birds, just saying...
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Old 02-03-2016, 04:22 PM   #434
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Over the 2014/15 ETS season it was the opposite. Yokomo won on carpet, xray won on asphalt.

With the new 2016 cars, it's really too early to say. Only one ETS done, and no outdoor racing in the northern hemisphere for another month or so.
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Old 02-03-2016, 06:02 PM   #435
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Originally Posted by Salkin View Post
Well, I don't believe that I have to provide links to prove that both cars are very good, they are beyond a doubt some of the top cars on the market. Maybe the best two right now. In my opinion, of course.

In my "neck of the woods" Xray is all dominant, we have ourselves raced Xray, so I very well know the performance of the Xray. In my local club the racers range from Xray factory driver to top level national drivers to the beginner.

To be diplomatic in an Xray thread, our change to the Yokomo has not left us slower, and especially the new 2016 BD7 has in our club and national races "turned heads". It is that good.

That's why I responded to the statement, that the Xray were better than the BD7 on carpet. I can myself find no evidence that this should be true. Neither through our personal use and experience, nor in RC forums etc.

I wanted to be respectful in an Xray thread, that's why I wrote that both cars are very good. And I truly believe that.

My credentials? On national level we are near or in the top (depending on class), on international level (ETS) we are in the middle of the pack. If that is of any use to you ?
I wasn't trying to bash the Yokomo or start anything with my comments, it is a great car, orange is just my favorite color! But at the high levels you talk about I think all the cars are competitive and may come down to tenths between the chassis. I have seen many threads here on RC tech where people ask about which chassis to buy, and I have seen the general consensus is that the Xray has been better on carpet (in the past). I'm guessing these comments are from the average American club racer who doesn't place that well on the national level and can't extract the absolute maximum out of the car. Another way to interpret it is that the Yokomo may have a narrower setup window on carpet and the average racer has a difficult time tapping into its performance. But I have never owned a Yokomo, these were just observations from threads here on RC tech over the last couple of years.

And as Gravity Dodger mentioned Yokomo didn't have a great showing at one of America's top carpet races. Granted the brand is not as big over here, but that seems to be in line with the (American) consensus the Xray is better on carpet.
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