RX8

RX8’13 New Features:

All-new fuel tank with interior baffles for stable engine performance

All-new Low Profile (LP) shocks

All-new lower alu shock bodies

All-new shorter shock rods

All-new fixed Delrin pistons

All-new Short Shock Springs (3S)

All-new front and rear lowered shock towers

All-new Reverse Clutch set for increased performance & durability

All-new shape of clutchbell

All-new clutchnut

All-new ultra-stable clutch spring

All-new redesigned front lower bumper for increased downforce, durability & stability of the car

All-new redesigned front upper bumper for increased durability

All-new redesigned rear lower arm 2-positions graphite shock holders for increased durability

All-new independent muffler mounting

All-new longer muffler wire

All-new front left bulkhead

All-new rear 2-speed shaft ball-bearing for increased durability

All-new rear right bulkhead for larger 2-speed shaft bearing

All-new stronger servo saver spring for increased steering and improved steering response

All-new steel servo saver pivot shaft for increased durability

All-new steel belt tensioner bushings for increased durability

All-new steel brake cam post for increased durability

All-new composite rear body holder for higher body mounting

Included optional lightweight front middle shaft from HUDY Spring Steel™

Included optional lightweight alu brake disk adapter



General

Developed, designed, and styled by legendary Dipl. Eng. Juraj Hudy and Martin Hudy, manufactured exclusively by XRAY in Europe in the world's most sophisticated RC manufacturing facility

Pure racing design, premium luxury quality, highest performance

Premium, exclusive, and high-tech materials used throughout

Unique, super-strong composite materials with XRAY's self-developed secret compound mixtures for suspension and drive train parts

World's lowest CG 1/8 on-road car platform

Easy-access to drive train parts for super-quick rebuilds and set-up changes


Chassis

CNC-machined 5mm Swiss 7075 T6 chassis, super-narrow design

Special openings machined and front and rear of chassis for additional graphite stiffeners and weights

Super-narrow radio plate CNC-machined from high-grade 2.5mm graphite

Centralized 125cc fuel tank offers 3 mounting positions, internal stone-type filter, and volume inserts to fine-tune fuel capacity

Fuel tank pressure cap with 1-pc profiled seal for perfect fit and sealing

Composite front and rear bulkheads for precision engineered suspension geometry and chassis flex

Belt tension adjustment in front and rear bulkheads

Unique compact lightweight radio case with rubber-covered quick-access system

Centralized, low-mounted receiver battery pack below fuel tank for easy access

Optional micro-size receiver battery pack allows fuel tank to be lowered by 3mm, creating an ultra-low 1/8 on-road platform

Ultra-low radio plate to create the world's lowest platform

Easy radio plate flex adjustment via bushings


Engine & Clutch

Quick-set aluminum engine mount system with fixed engine position for super-easy engine installation and gear mesh adjustment

Swiss 7075 T6 hardcoated flywheel

Easily-adjustable 3-shoe XCA (XRAY Centrifugal-axial) clutch

Clutch nut and preload adjustment collar manufactured from special HUDY Spring Steel™ for maximum lifespan and durability

Ultra-lightweight precision support plate and spring cup manufactured from high-tensile 7075 T6 aluminum

Clutchbell manufactured from high-grade special steel for high durability and superior lifespan

Clutchbell / pinion gear construction allows super-precise assembly

Swiss 7075 T6 machined pinion gears feature special profile teeth that are individually machined on a high-precision gear production machine; special hardcoating ensures maximum life

Carbide axial thrust-bearing and high-tensile spring

Robust spring-mounted exhaust mounting system


Brakes

7075 T6 aluminum brake hub with hardened, pressed brake disk drive pins

CNC-machined 1-piece brake disk with ventilating groove to dissipate heat from both sides of the disk

Brake disk is precision flat-ground for maximum braking efficiency and super-smooth braking action; strategically-placed ventilation holes ensure minimal brake pad wear

Brake disk manufactured from special steel and additionally heat-treated for maximum lifespan

Brake pad backing plates heat-treated for maximum lifespan

High-grip brake pads are specially bonded to backing plates for high resistance to generated heat build up

Special return springs ensure proper gap between brake pads

CNC-machined 7075 T6 aluminum brake cam is ball-bearing supported for super smoothness and precise brake control


Drivetrain

Ultra-smooth and efficient drivetrain using belt/pulley construction for lowest rotating mass

Exclusive HUDY Spring Steel™ drivetrain parts for highest performance and unmatched lifespan

High-performance HUDY Spring Steel™ front CVD drive shafts

Rear dogbone style HUDY Spring Steel™ drive shafts

Super-lightweight wheel axles CNC-machined from HUDY Spring Steel™

Swiss 7075 T6 alu wheel locks

Rear solid axle outdrives manufactured from HUDY Spring Steel™, specially hand-ground for maximum precision and smooth operation

PUR®-reinforced high-efficiency, low-friction, fine-pitch drive belts

Front middle shaft features large pulley for smooth belt operation and increased lifespan

Oversized pulleys for maximum-efficiency belt wrapping

Pulleys molded from super-low friction composite material for extra-long lifespan

All pulleys have 1-pc design to eliminate need for alu adapters (reduced weight)

Complete set of high-speed, blue-sealed ball-bearings, degreased, lightly oiled for maximum efficiency, individually controlled, selected, and inspected

Adjustable graphite side-belt tensioner


2-Speed Transmission

Precision-manufactured, super-smooth lightweight hollow middle layshaft made from tough HUDY Shaft Steel, specially heat treated for extra strength and long life

High-quality 1-way bearing hand-ground for maximum running precision and strength

2-speed spur gear adapter CNC-machined from Swiss 7075 T6 for precision fitment of 1-way bearing, allowing super-precise and wobble-free spur gear installation

World's most precise spur gears molded from special composite mixture ensures wobble-free running and eliminates run-out

Wide 2nd gear for increased durability and lifespan

Stiff 2-speed springs

Precise 2-speed adapter manufactured from hardened steel

The 2-speed gear box shoes molded from special composite mixture


Axles

Super lightweight front one-way differential with 1-way bearing

Front axle body machined from high-quality Swiss 7075 T6

Rear steel lightweight 1-piece solid axle features composite pulley with holes for self-cleaning

Diff outdrives manufactured from HUDY Spring Steel™ and specially ground for maximum precision


Suspension

Advanced suspension geometry precision engineered and finely tuned for high-competition racing

Lightweight, durable, and reinforced suspension parts molded from XRAY's self-developed composite mixture for suspension parts. Each suspension part is molded from a high-tech composite that is specially formulated for the particular part

High-tensile steel suspension pivot pins polished for smooth suspension action

Front and rear suspension arms allow super-easy wheelbase and weight balance adjustment

Fully-adjustable suspension featuring I.S.S. (Integrated Suspension Settings™) - front upper and rear lower suspension is mounted via eccentric bushings which allow full roll center adjustment (up/down & in/out)

Front steering block and rear uprights feature eccentric bushings for roll center and caster adjustment. Eccentric bushings in rear upright allow independent wheelbase adjustment.

Small, robust rear uprights feature two easily-adjustable upper roll center positions for traction adjustment. Uprights feature two body mounting adjustment positions to accommodate different body types

Easily-adjustable 0.5-2.5mm wheel offset using included shims on the wheel axles for front steering adjustment and rear traction characteristic adjustment

Front and rear track-width adjustment

Front upper arm design allows quick & easy caster adjustment

Hand-ground blade-style front-anti roll bars manufactured from Hudy Spring Steel™ are easily adjustable to alter stiffness

Front anti-roll bars are fully independent from front downstop adjustment

Rear wobble-free anti-roll bar supported by ball-bearings

Optional wire anti-roll bars or blade-style anti-roll bar for fine tuning

Premium Hudy Spring Steel™ adjustable turnbuckles

Lightweight, super-strong composite pivotball nuts

Precision pivotballs are specially hardened for exceptional robustness and enhanced lifespan

Rear lower suspension mounted independently from bulkheads;

Rear upright features shorter and longer pivot balls in the kit for optimum set-up adjustment


Steering

Centralized ball-bearing supported steering servo saver with adjustable spring tension

4 Ackermann positions

Servo mounting system for mid-size servos

Steering blocks with ideal Ackermann


Shocks

XRAY shocks feature fixed 3 and 4 holes pistons with 1.1, 1.2 and1.3mm holes

Fine-threaded alu racing shock bodies for precise height adjustment

Specially-hardened shock shafts for maximum strength

XRAY self-developed and manufactured 3S racing springs are hand-selected and tested for maximum precision, equal length, and equal damping characteristics

Shocks are mounted to graphite shock holders which are mounted on arms with geometry engineered for maximum stability

Front and rear CNC-machined premium graphite shock towers feature shock positions engineered for high-competition racing


Body & Wheels

Front bumper with precision downforce design which includes removable sections for downforce adjustment

Front and rear body mounts allow 2mm front/rear body position adjustment

Special composite mixture rear body mount with 3 positions for rear upright downforce adjustment

Front upper and lower composite bumpers are made from a special composite material to withstand hard impacts


Assembly & Support

Premium 3D full-color Instruction Manual is included and the comprehensive XRAY Set-up Book is available online as a free download

Exclusive Virtual Online Set-up Sheet database with thousands of set-up sheets for race tracks around the world

Premium, unmatched XRAY online support


Adjustment Possibilities:

Fully-adjustable front and rear suspension geometry: caster, camber, toe, ride height, droop, wheelbase, track-width, roll centers

Adjustable front & rear roll centers

Adjustable belt tension via bulkhead inserts

Adjustable HUDY Spring Steel™ turnbuckles (steering, servo, rear upper links)

Adjustable Ackermann positions

Front & rear upper and lower shock mounting locations

Adjustable alu racing shocks

Adjustable front anti-roll bar

Optional adjustable rear anti-roll bar

Adjustable weight balance



All specifications are subject to change without prior notice. Pre-production prototype is shown, final specifications may slightly vary. In some pictures optional parts may be shown. Option parts are not included and some must be purchased separately. Color of some aluminum parts may vary from the pictures and may be different between the different kits.

RX8 Specs:

Dimensions
Class: 1/8 nitro on-road car
Length w/o body: 436 mm
Chassis length: 388 mm
Wheelbase: adjustable 291 ~299 mm
Width: adjustable 252 ~260 mm
Weight: 1260 g
Ready-to-run weight: 2290 g
Chassis
Chassis: CNC-machined 5.0 mm Swiss 7075 T6 aluminum
Shock towers: machined laminated carbon graphite (front + rear) with multiple shock mounting and camber link roll center positions
Radio tray: machined laminated carbon graphite
Drivetrain
Type: triple belt, 4WD
Final drive ratio (FDR): 2-speed: 1st 6.63; 2nd 5.52
Front differential: one-way
Rear differential: solid axle
Front drive axle: CVD drive shafts - Hudy Spring Steel™
Rear drive axle: dogbone drive shafts - Hudy Spring Steel™
Suspension: pivot ball suspension
Shocks: Machined aluminum, oil-filled, coil-over shocks
Pinion gear (std): hardcoated alu 1st: 17T ; 2nd: 20T
Spur gear (std): molded composite 1st: 49T ; 2nd: 46T
Arms: standard
Adjustability
Ride height: adjustable front + rear
Camber: adjustable front + rear
Caster: adjustable front
Toe: adjustable front + rear
Downstops: adjustable front + rear
Roll center: adjustable front + rear
Ackermann: adjustable front
Anti-roll bars: adjustable front, 2.8 mm rear (optional adjustable)
Equipment:
Wheels: not included
Instructions: full-color Instruction Manual with 3D graphics
Packaging: carton box with vinyl bags with parts
Additionally included: Authentication Certificate, set-up sheet, parts list & exploded view, decals
Not included: radio system (transmitter and receiver), personal transponder, steering & throttle servos, engine, manifold & exhaust, starter box & starter box battery pack, receiver battery pack, glowplug igniter, battery charger, 1/8-scale bodyshell , wheels & tires, Lexan® paint, model R/C car fuel (nitromethane), tape, air filter & oil, CA glue, bearing oil, medium-grade (blue) threadlock, tire truer, tools