R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

    Hide Wikipost
Old 07-20-2017, 02:09 AM   -   Wikipost
R/C Tech Forums Thread Wiki: Xray T4'17
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
Last edit by: R Dodge
Welcome to the XRAY T4'17 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. Feel free to add anything you feel is useful to the community!

New for 2017:
The T4'17 comes available with either a Graphite chassis, or Aluminum Flex chassis. We recommend the Graphite chassis for starting on asphalt, and the Aluminum Flex for starting on carpet. The 2017 also comes standard with the floating swing rack as an option, and the Composite Graphite arms included. Most of the team prefers the Graphite arms for both asphalt and carpet, though sometimes Hard arms may be ideal for asphalt depending on the conditions. This year's car also comes with the new "In-line Flex Adjustment" which provides many more flex adjustments than in the past allowing you to focus & fine-tune on forward/back flex and side-to-side flex both together & independently. Additionally, the Ackermann has been moved back by 1mm and the spacing of the RF blocks is wider, creating 0.5° less rear toe from previous T4 models.

What's NEW at T4 2017? Convert your '16 to '17 specs with these parts:

- NEW chassis plate (3 options to chose from below)
- NEW Motor holder
- NEW Motor holder plate
- NEW center shaft holder
- NEW Floating Servo Mount

301142 T4'17 CHASSIS 2.2MM GRAPHITE
301143 T4'17 ALU CHASSIS 2.0MM - SWISS 7075 T6
301144 T4'17 ALU FLEX CHASSIS 2.0MM - SWISS 7075 T6

302536 ALU STEERING POST FOR FLOATING SERVO SAVER (2)
303066-O T4'17 ALU LAYSHAFT BULKHEAD CLOSED L/R - ORANGE
303067-O T4'17 ALU MOTOR MOUNT - ORANGE
303068-O T4'17 ALU MOTOR MOUNT PLATE - ORANGE
306204-O T4'17 ALU SERVO MOUNT - ORANGE
306233 T4'17 GRAPHITE FLOATING SERVO HOLDER 3.0MM
306530 T4'17 GRAPHITE CHASSIS STIFFENER 3.0MM

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
Mastering the Sanwa M12S: Utilizing Exponential and RMode
How to mount weight on your chassis Part2
Mastering the Sanwa M12S: Utilizing TH-Hold

Team driver Tim Wahl posted some very useful build tips for the T4'16 on Facebook as he worked through building a new kit. These tips will still apply on the current model.

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

Center Brace:
The manual indicates using a 2mm shim under the center brace when attaching to the chassis plate. The gap is actually 3mm, so a 3mm shim should be used here.

Tuning Note:
On Carpet we have found that adding screws or doubling up the graphite brace will make the car react quicker to steering input, & change direction faster. Raising the graphite brace off of the aluminum bulkheads by placing a shim under it on the front and rear holes will reduce response. Using the tie-rod will reduce initial response to input, but will generate more in-corner traction or 'side-bite'. Using no brace will generate even more of this 'side-bite' but all of this is at the expense of corner speed. Best to use the tie-rod or no brace only in low-traction conditions. Additionally, the center brace increases forward traction, so removing it will potentially increase wheel-spin out of low speed corners.

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.

ARS Tuning courtesy of Ed (TryHard):
If you set the ARS up with no shims under either inside or outside ball positions, it actually adds toe-in under compression, at around 1° at 5.2mm ride height (how much it adds depends how much the car compresses, obviously )

Adding shims reduces the amount added (1mm under one of the links gives about 0.5°), until the link has 2mm worth of shims (1mm either side, or 2mm on one side) makes the ARS neutral. Adding more shims then turns it into reducing toe in under compression.

Whilst that might sound a bit backwards, it's actually not quite as simple as it sounds. By having the links to add toe, you gain forward traction. Also consider as the car rolls, the inside wheel is in negative compression, and the outside in compression. So the inside is toe-ing out, and the outside toe-ing in, so the whole rear is then 'steering' in the direction of the turn. Obviously the inside wheel has a lot less influence than the outside as it's far less loaded, but the effect is still there.

Optional & Tuning Parts to consider:
XRA301196 T4 Graphite Upper Deck 1.6mm V2
XRA302254 Composite Steering Block - Graphite
XRA302334 Aluminum C-Hub Block - Caster
0° - Orange *Only for ARS*
XRA302383 Composite C-Hub Right – 4
° - Graphite (ECS)
XRA302384 Composite C-Hub Left – 4
° - Graphite (ECS)
XRA302711 Brass Front Lower 1-Piece Suspension Holder - Front - FF
XRA302803 1.3mm Front Anti-Roll Bar
XRA303360 Composite Upright 0° Outboard Toe-In - 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)
XRA305352 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)

XRA308039 Aluminum Progressive Shock System – Set (QTY 2) *Only for asphalt*

Recent Setups:
Bruno Coelho - IIC 2016 - High Bite Carpet - Modified
Alex Hagberg - AOC HK 2016 - Med Bite Asphalt - Modified
Jan Ratheisky - AOC HK 2016 - Med Bite Asphalt - 13.5
Chris Adams - Halloween Classic - High Bite Carpet - Modified
Chris Adams - ROAR Region 9 - Med Bite Asphalt - Modified
Craig Xavier - US Indoor Champs - High Bite Carpet - 17.5
Bruno Coelho - ETS Rd1 Hrotovice - Med Bite Carpet - Modified
Craig Xavier - Stock Wars - High Bite Carpet - 17.5
Jan Ratheisky - DHI Cup - Med Bite Carpet - 13.5
Chris Adams - Texas EOS Rd 1 - High Bite Carpet - Modified
Alex Hagberg - Snowbird Nationals - High Bite Carpet - Modified
Robbie Dodge - Snowbird Nationals - High Bite Carpet - 17.5
Jan Ratheisky - TITC - High Bite Asphalt - 13.5
Drew Ellis - ROAR Carpet Nationals - High Bite Carpet - Modified
Eric Anderson - ROAR Carpet Nationals - High Bite Carpet - 17.5
Martin Crisp - Canadian Nationals - Medium Bite Carpet - Modified
Martin Crisp - Canadian Nationals - Medium Bite Carpet - 17.5
Dan Hamann - MN State Champs - High Bite Carpet - 17.5

Print Wikipost

Like Tree93Likes
Reply
 
Thread Tools Search this Thread
Old 08-16-2016, 08:13 PM   #16
Tech Master
 
mikel33's Avatar
 
Join Date: Mar 2007
Posts: 1,407
Trader Rating: 2 (75%+)
Default

Quote:
Originally Posted by syndr0me View Post
I predict the T4'17 will actually just be a T4'16 in a new box with a picture of Bruno holding his world championship trophy on it.
But that picture will be optimized and luxurious.
__________________
Michael Larson.

Village Idiot Racing - Now accepting driver applications.
mikel33 is offline   Reply With Quote
Old 08-16-2016, 08:55 PM   #17
Set
Tech Adept
 
Join Date: Jun 2016
Location: Malaysia
Posts: 100
Default

Quote:
Originally Posted by syndr0me View Post
I predict the T4'17 will actually just be a T4'16 in a new box with a picture of Bruno holding his world championship trophy on it.
what about signature, does it comes with his signature?
Set is offline   Reply With Quote
Old 08-17-2016, 12:50 AM   #18
Tech Elite
 
R Dodge's Avatar
 
Join Date: Jul 2008
Posts: 2,256
Default

At least we know it will come with clearly labeled and organized parts bags. Also includes an easy to understand and highly detailed full color instruction manual with setup & option info.
__________________
★RCAmerica •Xray •Hudy •Motiv •PROTOform •Gravity •Avid •TQ Wire •Sanwa •BSR •ProLevelRC •2mmDesigns •Timmy •5Nines★
R Dodge is online now   Reply With Quote
Old 08-17-2016, 01:03 AM   #19
Tech Rookie
 
Join Date: May 2007
Location: Vienna / Austria
Posts: 14
Default

would be great if they change to slightly longer shocks, to fit f.e. Yokomo springs too.
Gizmo is using Shocks produced by Xray (I think I read they are from the NT1) they are slightly longer so most springs fit.
Or the WRC has the same, that would be great
mailman81 is offline   Reply With Quote
Old 08-17-2016, 01:12 AM   #20
Tech Addict
 
Losiho's Avatar
 
Join Date: Dec 2003
Location: Melbourne Australia
Posts: 642
Trader Rating: 1 (100%+)
Default

They've already announced the name - T4 2017. To me, that implies that it will NOT be a completely new car, methinks it'll be another new chassis / motor mount mated to the existing T4-series suspension pieces.
Losiho is offline   Reply With Quote
Old 08-17-2016, 02:17 AM   #21
Tech Adept
 
Join Date: Sep 2015
Posts: 104
Default

For sure it's going to be very minor. The car is the fastest around at the moment, so no need to change much. I keep hearing about the hammering of conventional cars, but I have yet to see an unconventional car win something major.

My tip is lowered layshaft holders with shims or a small part on top so that you don't have to shim the whole top deck.
perzeus is offline   Reply With Quote
Old 08-17-2016, 02:32 AM   #22
Tech Fanatic
 
alecladanga's Avatar
 
Join Date: Jul 2006
Location: Manila
Posts: 824
Trader Rating: 5 (100%+)
Default

i would also like to see .75 suspension inserts for more precise toe in options. that's it for me
alecladanga is offline   Reply With Quote
Old 08-17-2016, 02:35 AM   #23
Tech Regular
 
Join Date: Feb 2014
Posts: 450
Trader Rating: 6 (100%+)
Default

Aluminum chassis and narrower servo mount for shorty servos would be nice.
nwagner is offline   Reply With Quote
Old 08-17-2016, 03:14 AM   #24
Tech Elite
 
Join Date: Jul 2010
Posts: 2,226
Trader Rating: 9 (100%+)
Default

Considering Bruno and Alex have been at the pointy end with basically kit standard cars with very few (and then only subtle) prototype parts *and* money no object (almost) infinity drivers such as Jilles are running T4's by choice suggests it definitely won't be a revolution.

Definitely think we will see Carpet and Asphalt editions - the XB2 has set that trend for them now and sold well.

Would be nice if the asphalt one comes with a graphite chassis that is backward compatible and includes graphite plastics cause a) my graphite chassis is quite worn and b) I don't need another set of std plastics I won't use
cplus is offline   Reply With Quote
Old 08-17-2016, 05:25 AM   #25
Tech Adept
 
Join Date: Mar 2012
Location: The Netherlands
Posts: 170
Default

Quote:
Originally Posted by Ggrant View Post
I'm hoping eventually Xray goes and make a unconventional designed car and sets itself apart from some other manufacturers . It seems lately that the conventional cars are being hammered and something needs to be done to address the imbalance .
Like Serpent is doing right now with their new 4-X unconventional design?

IF XRAY would do that, I don't expect it would be called the T4, but that it would be a new number in the range.
Thaan is offline   Reply With Quote
Old 08-17-2016, 05:44 AM   #26
Tech Addict
 
Airwave's Avatar
 
Join Date: Jul 2007
Posts: 722
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by cplus View Post
Considering Bruno and Alex have been at the pointy end with basically kit standard cars with very few (and then only subtle) prototype parts *and* money no object (almost) infinity drivers such as Jilles are running T4's by choice suggests it definitely won't be a revolution.

Definitely think we will see Carpet and Asphalt editions - the XB2 has set that trend for them now and sold well.

Would be nice if the asphalt one comes with a graphite chassis that is backward compatible and includes graphite plastics cause a) my graphite chassis is quite worn and b) I don't need another set of std plastics I won't use
Because you have seen Bruno's and Alex's cars? You are very lucky so...

What about a black edition... it would be luxury lol
Airwave is offline   Reply With Quote
Old 08-17-2016, 06:22 AM   #27
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,667
Default

Quote:
Originally Posted by Ggrant View Post
It seems lately that the conventional cars are being hammered and something needs to be done to address the imbalance .
Where are they getting hammered?
__________________
Xray T4'17, T4'14 (Wet Car)
Xray X12 2017
Xray X1'16
wlrc.co.uk (West London Racing Centre)
RCDisco.co.uk
Skiddins is offline   Reply With Quote
Old 08-17-2016, 07:44 AM   #28
Tech Elite
 
dr_hfuhuhurr's Avatar
 
Join Date: Aug 2003
Location: Westchester, NY
Posts: 4,493
Trader Rating: 73 (100%+)
Default

Quote:
Originally Posted by Airwave View Post
What about a black edition
MeBeMikey likes this.
__________________
"There is a fine line between hobby and mental illness. Which side are you on?"

“Life is hard; it's harder if you're stupid.” - John Wayne
dr_hfuhuhurr is offline   Reply With Quote
Old 08-18-2016, 01:22 AM   #29
Tech Elite
 
Join Date: Jul 2010
Posts: 2,226
Trader Rating: 9 (100%+)
Default

Quote:
Originally Posted by Airwave View Post
Because you have seen Bruno's and Alex's cars? You are very lucky so...
No personally in the flesh for a while, but I've seen images lately with obviously prototype elements.

For example, note the servo mount. The alloy has two keys into the carbon as well as the three screws. Subtle difference, which won't effect it much - but something we might see on the new car, with a whole paragraph about how it prevents tweak and is super important to have

cplus is offline   Reply With Quote
Old 08-18-2016, 02:02 AM   #30
Set
Tech Adept
 
Join Date: Jun 2016
Location: Malaysia
Posts: 100
Default

maybe this time we can change the chub backwards and it will increase steering
Set is offline   Reply With Quote
Reply


Tags
2017, b2uk, sedan, t4'17, touring, xray


Currently Active Users Viewing This Thread: 2 (0 members and 2 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 03:29 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net