XRAY T2
1/10-scale electric 4WD touring car kit
Europe’s latest high-end racing machine

Words: Matt Higgins

In 2001, XRAY entered the touring car scene with the release of the T1—a self-proclaimed luxury racecar. With its high-performance design and eye-catching machining, it fit the bill, and so did the updated versions that followed—the T1 EV02, T1FK and T1FK’05. Five years ago, based in the Slovak Republic, XRAY was a new name in RC car manufacturing, but the company drew on many years of design expertise and experience in RC. It came out of the gate running, and the T1 received as much attention on the bench as it did on the track. The new T2 picks up where its predecessors left off, and although it might look similar, it’s an entirely new take on what a racing machine should be. The T2’s long list of new features includes its wild Multi-Flex chassis design, and the new platform has already dominated some major races. Let’s see whether XRAY’s latest goes as fast as it looks.


TESTING: Round 1
To see what the T2 is capable of, I ventured over to SpeedZone Hobbies in Rocky Hill, CT. This indoor, carpet track features fresh Ozite and a smooth, marginally technical layout. It’s a fun track to run, and its usual flowing design allows good, fast racing despite the fairly tight quarters. Knowing how well XRAY’s cars handle on the fuzzy stuff and seeing how well the T2 has done thus far at some big races, my hopes were pretty high. To my surprise, the SpeedZone crew put down a new and very different layout the day I showed up to test. Using some of my old race notes and by simply asking some of the local hot shoes, I came up with a good starting point for gearing. XRAY’s included glossy quick-reference charts made it easy to pick the proper pinion to match my tire size and spur gear. With the gearing in the ballpark, I knew the T2 would scoot along just fine. It’s easy to make any modern touring car go fast down the straights, but the real, race-winning difference is in corner speed. To be a winner, a car has to be able to rotate around tight corners without scrubbing off speed.

I built my T2 with the recommended XRAY foam tire setup, and my first impression was good. Nothing seemed out of sorts, but the car did drift all over the place when I really squeezed the trigger. This was no fault of the T2, as the new layout had no groove at all, and every car on the track experienced the same problem. It did get better as the night went on, but it was pretty rough through qualifying. During practice and after only a few laps, I brought the T2 in and tightened the front and rear differentials. I simply inserted a thin, hex wrench through a hole in one outdrive and turned the opposite wheel. On most other cars, this task could take about 10 minutes, but I had both ends adjusted and the T2 back on the track in about a minute.

The Team Brood 19-turn motor had plenty zip, and the Team Brood batteries provided serious punch. The numbers on these cells were better than most, so I wasn’t too surprised. The T2 is basically a rocket and was hands-down the fastest car down the straight. I avoided making any suspension changes, as the track was changing fast throughout the night. In my first round of qualifying, the track was still very loose; I over-drove the T2 and hit just about everything but the pace car.

I managed a couple fast laps but ended up breaking the steering knuckle and the C-hub. It was total chaos on the track, and all but one out of the five or six cars on the track broke. I repaired the T2 and prepared for the second round. I played it safe and put down a conservative run that was worth sixth fastest. In the end, I finished fifth in the A-main.

With differentials front and rear, the T2 again tracked perfectly straight when I stabbed the brakes, and it came off the line the same way, thanks to the torque-steer-free belt drivetrain. Although it was very responsive, the T2 was easy to drive. When traction improved, the T2 wasn’t twitchy and tracked straight; I was able to take corners tight, right on the pipe without having to slow down dramatically—exactly what I like in a touring car.

Round 2
I returned to SpeedZone a few days later for the second day of testing. The recommended setup was pretty close to ideal right out of the box, but I did switch the rear springs for a softer blue set. This made the T2 a little less of a handful on the unusually slippery carpet. As the groove gets better on the new layout, I might switch back to a slightly stiffer rear spring.

Before qualifying, the track was already getting much better, and I was able to drive the T2 much harder than I could on my previous trip to SpeedZone. Overall, the T2 handles great. It has the typical on-power push, but some setup changes will cure that. Out of the box, it rotates extremely well; in fact, it is the best car I’ve driven on carpet. I’ve had great results racing it so far, and I plan to return to the track with my T2.


 

Pro tips
with Mike Dumas

We contacted Team XRAY factory pilot Mike Dumas for tips on setting up and building the T2.

Here’s what Mike had to say:

  • When building this kit, be sure to build it on a flat surface such as the Hudy setup board. This will prevent building the car with tweak.

  • Make sure that all the screws are fully tightened because the flex-technology chassis does, in fact, twist while the car runs around the track. This will ensure that the screws won’t loosen and potentially get lost.

  • I recommend that you widen the car. Instead of using the 1.5mm shims in between the bulkhead and the roll center mounts, I use 2.5mm shims. This makes the car a little easier to drive.

Chassis
» 2.5mm graphite main plate » 2.5mm graphite top plate » Fully countersunk » Aluminum bulkheads
The T2’s chassis is its most noticeable new feature; in addition to the many less glamorous and more subtle changes on the platform, the new Multi-Flex chassis certainly steals the show. Similar to a few other touring cars such as Associated’s FT TC4, the T2 is designed to allow you to tune the stiffness of the car by installing or removing certain screws and chassis-support standoffs. This design allows a car to be set up for a variety of track conditions. Without switching chassis plates, the T2 can be dialed to have a lot of flex for low-traction, paved tracks and to be rigid for high-traction carpet tracks. This versatility means the T2 offers a lot of car for the money.

Viewing the chassis from the bottom reveals new, curved cutouts around each differential area. This, along with a new top-plate design, allows the flex to be controlled and used as a tuning aid. The top plate is well relieved of material and is secured by 10 screws that can be removed as needed to suit track conditions.

The chassis had a traditional layout with batteries on the right and all other electronics on the left. XRAY designed the T2 to have an extremely narrow chassis. At its widest, the main plate is less than 105mm wide (about 4 inches). This puts the center of mass close to the car’s centerline, and that, in theory, allows the car to better transition from corner to corner.

The T2’s bulkheads are an all-new design, but as expected, they are beautifully machined. The edges are chamfered, and Swiss T6 7075 polished aluminum is used throughout. The two-piece bulkheads allow extremely easy access to the differentials. The right rear bulkhead is shaped to allow you to tuck the battery under it so that it’s positioned close to the centerline.

Because the chassis is so narrow, the electronics hang off the side a bit. How much they hang off depends on the size of your electronics; XRAY offers an optional motor guard in case you run with the Smash Bros.

Drivetrain
» Prebuilt, externally adjustable ball differentials » Spring steel universal-joint drive axles » Rubber-sealed ball bearings » Dual belt drive
With complicated drivetrain configurations, some belt cars can be a pain to work on. The T2 is, in contrast, a tuner’s dream. With two-piece bulkheads and a separate plate that secures the top shaft, these parts are all easily removable for service or replacement. The differentials, as well as the belts and pulleys, are carryover components from previous XRAY touring cars. The top shaft is the exception; this piece is now hollow for reduced rotational mass. The internal ratio remains 1.7 to 1, and the differentials still use XRAY’s labyrinth-style shields to keep grit and grime at bay. The included spur gear is 48-pitch. I run my car indoors on carpet, so I switched to a 64-pitch gear from Precision Racing Systems (PRS). In anticipation of how popular the T2 will be, PRS immediately retooled their gears to allow a seamless fit on the new XRAY machine. To reduce unsprung weight, small and lightweight 5x10 ball bearings are used in the front and rear uprights. As with previous designs, eccentric outdrive bearing holders that key into the bulkheads allow you to adjust belt tension easily.

Suspension & steering
» Lower H-arm, upper camber-link suspension » Threaded, plastic-body shocks » Steel turnbuckle tie rods » 3mm graphite shock towers
The T2 features entirely new suspension geometry that XRAY claims is more responsive than the previous designs. The shorter, lower arms are attached to small inboard composite plastic mounts reinforced with aluminum inserts that are, in turn, bolted to each bulkhead. Each arm is captured between a pair of the mounts, and three arm mounts are included to adjust roll center, pro-squat and anti-squat. These mounts are extremely easy to access, and a single bolt retains each one. The ease-of-tuning theme continues with the inner, upper camber-link mounts on the shock towers. The inner mount, an aluminum eccentric piece, can be mounted in one of four Quick Roll Center positions. Simply loosen the attachment bolt, and rotate the keyed piece into one of the four locations. Wheelbase, track and toe are all also easily adjusted. XRAY also redesigned the shocks. The shock bodies, shafts and ball ends are all shorter and have new parts. XRAY includes both externally adjustable pistons and standard pistons.

The steering system is similar to those of previous XRAY designs; a single centrally mounted bellcrank is sandwiched between the top deck and main chassis plate. The bellcrank is ball-bearing supported, and the bearings sit in eccentric pieces that you can mount in one of two ways to vary Ackerman. You can also adjust Ackerman on the steering hubs.

Body, wheels & tires
» Jaco foam tires
XRAY knows that many of its U.S. customers will race on carpet, so it includes Jaco foam tires (double pink/orange in front and double pink in the rear). My early-release kit came straight from Europe, so it was sans tires. I bolted on a set of TRC plaid fronts and purple rears that I know work well at my local track. XRAY leaves the choice of body up to you, but the T2 has much more robust 6mm thick body posts than those of previous versions. I called Bill Zegers to lay some Parma Faskolor paint on a Protoform Pontiac G6 shell. This body is designed specifically for carpet use and looks dope.

The new top shaft is hollow. The pulleys are the same 20-tooth pieces as XRAY used before. XRAY also retains the 1.7:1 drive ratio.



The XRAY’s prebuilt differentials are easy to adjust. XRAY’s Labyrinth covers increase the time between rebuilds.


The slots are part of the new Multi-Flex design. Contrary to popular belief, flex can be a good thing.


ON THE BENCH
XRAY kits are well-known for going together easily, and the T2 was no exception. It's a fun, easy build, but if you plan to race, I highly recommend that you take your time and make sure that each assembly works perfectly. The instructions are fantastic, as is the included setup guide; it is so good that I don't go to the track without it.

ADJUSTABLE SHOCKS
I built the shocks with the externally adjustable pistons, but before I left the bench, I swapped them out for the standard pistons. As much as I liked the idea of being able to dial in the shocks without taking them apart, I didn't feel confident that I would always get the setting I wanted. With the standard pistons, there's more labor but no guesswork, so I recommend them for racing.

SECURE UNIVERSAL JOINTS
To ensure that each universal joint's main pin won't back out, I used a drop of thread-lock on the setscrews and also wrapped the outside of the joint's cup with a band of heat-shrink tubing. The heated tubing should keep the pin in place even if the setscrew loosens.

SMOOTH CHASSIS
Most people will sand and seal the chassis plate's edges with CA, but you should thoroughly round or chamfer the bottom edge and knock off every sharp edge on the chassis' underside. During races, the chassis will rub the track, and you don't want a sharp edge to get hung up and cause erratic handling or to scrub off speed.

WIRING
As you can see in the chassis photos, I originally routed the positive battery wire over the top plate; I attached it directly to the motor and then to the ESC. That allows me to use little wire, but the wire could contact the spur gear. For peace of mind, I recommend that you run the wire under the top plate. You'll use a little more wire, but your setup will be much safer.

SECURE HEX PIN
The T2's hex pins are not forced-fit roll pins; they're much easier to install and remove, but they could also fall out easily when you remove the hex. You can solve this problem by placing a small drop of silicone glue on each pin. This will prevent them from falling out but will still allow them to be removed easily.

 

The all-new, two-piece bulkheads allow easy diff access. The entire T2 is very easy to work on and adjust.


You can see how the rear bulkhead has been shaped to allow the batteries to sit near the center of the car.


The front suspension has the trademark XRAY look. I swapped in optional springs so that I could test on carpet.


FACTORY OPTIONS
» Impact-absorbing front bumper—item no. 301203
» Anti-roll bar set (F/R)—302401/303401
» Graphite motor guard—303060
» Graphite battery strap w/aluminum stands—306163
» Aluminum wheel hex set (+1mm offset)—305352

MOLDED COMPOSITE STEERING PARTS
» C-hub front block 2 deg. (R/L)—302343/302344
» C-hub front block 6 deg. (R/L)—302347/302348

MACHINED ALUMINUM STEERING PARTS
» C-hub front block 0 deg.—302334
» C-hub front block 2 deg. (R/L)—302335/302336
» C-hub front block 4 deg. (R/L)—302337/302338
» C-hub front block 6 deg. (R/L)—302339/302340
» Uprights rear 1-deg. outboard toe—303358
» Uprights rear 2-deg. outboard toe—303359

THE COMP
VEHICLE » PRICE** » REVIEWED

Corally RDX U.S. Carpet Spec » $450 » 9/05
HPI RS4 Pro 4 Hara Edition » $380 » 12/05
Losi JRX-S » $360 » 7/05
Schumacher Mi2 EC Foam Spec » $440
Tamiya TRF 415MS » $470 » 9/05
Team Associated FT TC4 » $340 » 12/05
Yokomo MR-4TC BD » $410 » 9/05

*Partial list **Varies with dealer



SPECIFICATIONS:

Length w/out body 14.6 in. (372mm)
Wheelbase 10.1 to 10.3 in. (257 to 261mm)
Width 7.4 in. (189mm)
Weight, as tested 47 oz. (1,332g)

Chassis 2.5mm laminated carbon graphite

Drivetrain type 4WD belt
Transmission ratio 1.7:1
Final drive ratio 5.99:1 (as tested with 33T pinion and 116T spur, not included)
Differentials Ball-type with lightened steel outdrives
Drive axles Universal joint

Suspension-type Lower H-arm with steel upper camber links
Inboard camber-link positions (F/R) 4/4
Outboard camber-link positions (F/R) 1/2
Shocks Threaded, plastic-body w/externally adjustable or standard pistons
Upper shock positions (F/R) 5/6
Lower shock positions (F/R) 2/2

Wheels Jaco white dish rims, 12mm hex
Tires Jaco premounted and trued foams
Body Not included

BONUS
» Tons of corner.
» Easy to adjust and versatile.
» Looks as good as it runs.

BOGUS
» Plastic-body shocks.



YOU'LL NEED
Transmitter
Servo
ESC
Charger
6-cell pack
Motor
Tires
Body

WE USED
Spektrum DX3
Spektrum Z590
LRP QC2
LRP Pulsar Competition Plus
Team Brood
Team Brood Atlas-based 19-turn
TRC
Protoform Pontiac G6

KIT RATINGS
INSTRUCTIONS
9.5
The manual looks great but offers limited written instructions. The setup guide is awesome and loaded with tons of great information.
INSTRUCTIONS
9.5
The manual looks great but offers limited written instructions. The setup guide is awesome and loaded with tons of great information.
ADJUSTABILITY & MAINTENANCE
10
I can't imagine a car that's easier to work on. Everything is very accessible. Tuning adjustments and repairs couldn't be any easier.

PERFORMANCE RATINGS

ACCELERATION
9
9
T2's drivetrain works great and puts everything your motor and battery have down on the track.
TURN IN
8
9
The handling is aggressive without feeling twitchy. The T2 turns in hard.
CORNER SPEED
8
9
The handling is aggressive without feeling twitchy. The T2 turns in hard.
ON-POWER STEERING
8
8
Like most touring cars, the T2 pulls away from the apex when on-power.



THE VERDICT
Word of XRAY's new car was “leaked” early, and the hype started as soon as the first images hit the Web. After all the prerelease excitement, a lot of the online attention turned to the inevitable witch-hunt for possible flaws. Here's a bit of advice; don't listen to the gossip queens who have more experience talking smack online than turning fast laps with this car or any other. When it comes to racing, the T2 is for real. This dog can hunt, and unlike the Colts' offense, this machine isn't overrated. I'll be sticking with my T2. I'm faster with it, and it's the easiest car to work on that I've ever owned.



XRAY T2
Contact XRAY; distributed by RC America
(800) 519-RCA1; teamxray.com; rcamerica.com
Price $420 (varies with dealer)

SOURCE GUIDE

LRP distributed by Team Associated teamassociated.com

Spektrum distributed Horizon Hobby spektrumrc.com

Parma parmapse.com

Precision Racing Systems (PRS) precisionracingsystems.com


Protoform prolineracing.com

Team Brood teambrood.com

TRC teamtrinity.com

XRAY Products distributed by XRAY USA, contact RC America teamxray.com

Zegers R/C Graffixx zegersrcgraffixx.com

Source :

Horizon Hobby is recognized for top quality hobby products and first-class service around the world.

 

Additional reviews made by several international RC magazine, published by Team XRAY

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