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Xray T4 18

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Old 10-30-2017, 01:53 AM   -   Wikipost
R/C Tech Forums Thread Wiki: Xray T4 18
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Welcome to the XRAY T4'18 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 2018:
Similar to 2017, the T4'18 kit comes available in the U.S. with either a Graphite chassis (Part no. XRA300024), or Aluminum Flex chassis (Part no. XRA300024A) along with all of the great features introduced last year. We recommend the Graphite chassis for starting on asphalt, and the Aluminum Flex for starting on carpet. The big changes for 2018 are much lower center of gravity, courtesy of the Ultra Low Profile (ULP) shocks/towers and narrower weight distribution by shifting the motor in towards the center-line of the car. In moving the motor closer to the center, the topdeck and layshaft bulkheads have been re-designed. Also new this year, the motor mount includes more holes which extend further toward the rear of the car to improve traction. With the new shorter shocks, the 2018 will use the same springs as previous T4 models.

What's NEW at T4 2018? Convert your '17 to '18 specs with these parts:

- NEW chassis plate (3 options to chose from, Graphite, Aluminum, Alum. Flex)
- NEW topdeck
- NEW ULP shocks (4mm shorter than 2017)
- NEW ULP shock towers (4mm shorter than 2017)
- NEW Motor mount (1mm narrower than 2017)
- NEW Motor mount plate
- NEW layshaft bulkheads
- NEW 51mm ECS ES driveshafts

301145 T4'18 CHASSIS 2.2MM GRAPHITE
301199 T4'18 UPPER DECK 2.0MM GRAPHITE
302084 ULP SHOCK TOWER FRONT 3.0MM GRAPHITE
303001-O T4'18 ALU LAYSHAFT BULKHEAD RIGHT - ORANGE
303002-O T4'18 ALU MOTOR MOUNT - ORANGE
303003-O T4'18 ALU MOTOR MOUNT PLATE - ORANGE
303085 ULP SHOCK TOWER REAR 3.0MM GRAPHITE
305221 ECS (ES) DRIVE SHAFT 51MM FOR 2MM PIN - HUDY SPRING STEEL(tm) (1)
305334 ECS ES (EXTRA STRONG) DRIVE SHAFT 51MM - HUDY SPRING STEEL(tm) - SET
308043-O ULP ALU SHOCK ADJUSTABLE NUT - ORANGE (2)
308308-O ULP ALU SHOCK ABSORBER-SET - ORANGE (2)
308324 ULP ALU SHOCK BODY (2)
308334 ULP COMPOSITE SHOCK PARTS
308354-O ULP ALU SHOCK CAP-NUT WITH VENT HOLE - ORANGE (2)

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

ULP Shock:

Building the new ULP Shock w/ Zero Rebound by Dominic Quek

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:

XRA301146 T4'18 ALU CHASSIS 2.0MM - SWISS 7075 T6 **For high traction**
XRA301147 T4'18 ALU FLEX CHASSIS 2.0MM - SWISS 7075 T6 **For very high traction**
XRA301169 T4'18 UPPER DECK 1.6MM GRAPHITE
XRA302254 Composite Steering Block - Graphite
XRA302334 Aluminum C-Hub Block - Caster
0° - Orange **Only for ARS**
XRA302383 Composite C-Hub Right – 4
° - Graphite (ECS) **Not recommended for high traction**
XRA302384 Composite C-Hub Left – 4
° - Graphite (ECS) **Not recommended for high traction**
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
XRA308029 ULP ALU PROGRESSIVE SHOCK SYSTEM - SET (2) **Only for asphalt**
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)


Recent Setups:
7-Oct - Alexander Hagberg - IIC - High Traction Carpet - Mod Q2, P2
7-Oct - Craig Xavier - IIC - High Traction Carpet - SuperStock Q5, P5

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Old 09-15-2017, 11:19 PM
  #91  
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PM me a price EA
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Old 09-16-2017, 05:05 AM
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Has there been discussions or rumors of which chassis plate will be imported by RCA to the states? The Xray site states the carbon chassis is standard and both aluminum chassis (301143 & 301144) are options.

I recall for the 17' the US kits had an aluminum chassis.

Snowy.
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Old 09-16-2017, 05:54 AM
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Originally Posted by Essnowyt View Post
Has there been discussions or rumors of which chassis plate will be imported by RCA to the states? The Xray site states the carbon chassis is standard and both aluminum chassis (301143 & 301144) are options.

I recall for the 17' the US kits had an aluminum chassis.

Snowy.
$599 with CF chassis would be a deal breaker. Hopefully it's the same as last year with alum and graphite arms in the kit.
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Old 09-16-2017, 06:10 AM
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Originally Posted by syndr0me View Post
$599 with CF chassis would be a deal breaker. Hopefully it's the same as last year with alum and graphite arms in the kit.
According to the manual, graphite arms will be in the standard kit, yes. No graphite c-hubs or knuckles though.
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Old 09-16-2017, 06:12 AM
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Originally Posted by syndr0me View Post
$599 with CF chassis would be a deal breaker. Hopefully it's the same as last year with alum and graphite arms in the kit.
As long as people buy them at ever increasing prices, All you will get is ever increasing prices
( That goes for all the RC industry. )
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Old 09-16-2017, 07:01 AM
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Even if the kit was $619.00 USD I would still purchase the kit. Can't argue or take anything away from the X-ray. This brand chassis is the toughest, most reliable, the sexiest, most consistent and probably going to be the fastest kit chassis out the box than any other manufacture. I'll take two please!
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Old 09-16-2017, 08:45 AM
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Originally Posted by NEED-MORE-SPEED View Post
Even if the kit was $619.00 USD I would still purchase the kit. Can't argue or take anything away from the X-ray. This brand chassis is the toughest, most reliable, the sexiest, most consistent and probably going to be the fastest kit chassis out the box than any other manufacture. I'll take two please!
Xrays are great cars . Ok thats $ 1362.60 (10% tax) for you
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Old 09-16-2017, 09:24 PM
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Originally Posted by EAMotorsports View Post
Because I am an authorized dealer for them and have 10 kits in route.

EA
They never sell at the recommended price. Well, almost never.

Plus they probably have 100 kits coming not 10, so they can get away with tight margins.
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Old 09-16-2017, 11:36 PM
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Originally Posted by cplus View Post
They never sell at the recommended price. Well, almost never.

Plus they probably have 100 kits coming not 10, so they can get away with tight margins.
You are missing the point. In the US the min advertised price is 599. Some people will fudge them a little less. But go much less and RCAmerica will not sell to you in the future. Xray is the same way to its distributors.

And NO shop gets 100 kits. I can promise you that.

EA
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Old 09-16-2017, 11:37 PM
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Originally Posted by Essnowyt View Post
Has there been discussions or rumors of which chassis plate will be imported by RCA to the states? The Xray site states the carbon chassis is standard and both aluminum chassis (301143 & 301144) are options.

I recall for the 17' the US kits had an aluminum chassis.

Snowy.
All my kits are coming with alumn chassis just like last year. You can order either was from Rcamerica.

EA
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Old 09-17-2017, 03:27 AM
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Originally Posted by EAMotorsports View Post
You are missing the point. In the US the min advertised price is 599. Some people will fudge them a little less. But go much less and RCAmerica will not sell to you in the future. Xray is the same way to its distributors.

And NO shop gets 100 kits. I can promise you that.

EA
You know RCMart is in Hong Kong right?

RCMARKET are advertising even cheaper.

As for stock who knows what they would get, but they are definitley up there in terms of global sales.
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Old 09-17-2017, 04:15 AM
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$510 at RCMart with a free body (A Plus) and an Xray T-shirt. Probably the best deal there will ever be on the car if you get lucky in the customs lotto!

£490 (Demon) is the cheapest I could find in the UK. That's a huge leap from the £405 I paid for my '17. I know Brexit is part of the problem but it's starting to get to silly prices.
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Old 09-17-2017, 04:57 AM
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Originally Posted by cplus View Post
You know RCMart is in Hong Kong right?

RCMARKET are advertising even cheaper.

As for stock who knows what they would get, but they are definitley up there in terms of global sales.
I think EA's point is if everyone buys from places like RCMarket because it's cheapest then you won't have any distributors or shops stocking these product. There will be no shops at race meetings for support and you will have to important every thing in yourself.
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Old 09-17-2017, 05:53 AM
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Originally Posted by Bar View Post
I think EA's point is if everyone buys from places like RCMarket because it's cheapest then you won't have any distributors or shops stocking these product. There will be no shops at race meetings for support and you will have to important every thing in yourself.
Plus with RCMart you will pay for shipping to US $45 and wait like a month to get it. Not to mention a headache if something is wrong...
Sometimes the cheapest is not the best...
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Old 09-17-2017, 06:13 AM
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Originally Posted by onenext View Post
Plus with RCMart you will pay for shipping to US $45 and wait like a month to get it. Not to mention a headache if something is wrong...
Sometimes the cheapest is not the best...
As well as a risk of being caught and having to pay the import duty.
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