Greyscale Racing MRCG1.1 Competition Pan Chassis :: Aftermarket Chassis :: Kyosho Mini-Z Racer

Introduction:
The MRCG1.1 is the evolution of our now world-famous MRCG, designed to be faster, stronger, more user-friendly, and ultimately better in every way. Based on Kyosho’s proven Mini-Z MR-02 platform, the new MRCG1.1 features geometry updates and other refinements throughout the car, making it the new ultimate 1/28 open class pan car chassis!

At a glance:
- Built on the race-proven Mini-Z MR-02 platform; uses many MR-02 parts
- Version 2 of our trademark Virtual Center Pivot rear suspension
- Tools-free quick-release battery system designed for endurance racing
- Ultra-low center of gravity and polar moment of inertia
- 15% weight reduction over MR-02
- 1.5mm quasi-isotropic woven graphite chassis
- 0.8mm FRP flex plates and small chassis parts
- 6061 aluminum alloy used throughout; brilliant orange anodized finish
- Sliding, 1-piece motor mount allows easy gear mesh adjustment
- Unique tierod steering system with optimized Ackerman
- Fully adjustable suspension: spring rate, anti-roll, damping, preload, droop, ride height, roll center, rear steer, camber and toe
- 94-100mm adjustable wheelbase
- Compatible with Mini-Z MR-02 bodies and polycarbonate bodies

Features:

Ultra low CG, weight, and polar moment of inertia

The MRCG1.1 is a pure racing chassis, just like its predecessor. Every single element of the chassis is lowered to the maximum physical limit: the motor and batteries are flush with the bottom of the chassis, and the batteries lie in the absolute center of the car to achieve an optimal weight distribution and polar moment of inertia. Woven graphite is used extensively in the chassis for its light weight and high strength; where flexibility is needed, thin FRP is used for its durability and adds a stylish touch of color. The end result is an extremely low CG and polar moment of inertia, and a massive 15% weight reduction vs. the MR-02, creating a chassis of unparalleled corner speed and steering response.

Virtual Center Pivot Version 2 rear suspension

The MRCG1.1 receives a comprehensive update of the Virtual Center Pivot suspension pioneered by the MRCG. The two flex plates have been combined into one wraparound flex plate, providing extra durability and holding the center spring more securely in place. New rear steer spacers allow the rear axle to provide passive rear steering assistance as the G-forces climb: whereas a normal Mini-Z understeers at high speed, the MRCG1.1 dives into and out of corners faster than ever before.

The smaller details have received updates too: the new center spring mount now uses a locknut to adjust preload, and the side spring mounting locations have been moved outwards, allowing for greater leverage and screw-turn adjustability. Other details have carried over from the MRCG: the flex plates still have unlimited droop, and optional shims can be used to adjust both roll center and rear steer. Altogether this makes the MRCG1.1's VCP V2 rear suspension the most advanced on the market, and your lap times will certaily show it!

Lightweight, user-friendly rear pod

The MRCG1.1’s rear pod is among the lightest on the market at a scant 5 grams. The lightweight motor mount accepts any drilled 130-can motors; it doubles as an extra standoff on the pod, stiffening its structure to further improve handling. The mounting screws for the motor mount are on the top and bottom of the rear pod instead of near the differential, making gear mesh adjustment and motor removal a breeze. The rear axle is held by updated bearing carriers that allow ride height adjustments in 0.5mm increments, and the bottom plate has a center mark for ease of use on setup boards.

Stiffer, stronger revised front end

The MRCG1.1 receives several geometry updates in the front end. New triangulated front lower arms stiffen up the front end for sharper steering response. They resist collisions better too, and are easier to remove for maintenance. The top brace has been updated with 2 degrees of caster: this complements the stiffer front end well, increasing corner exit speed and stability at high speeds. Like the original MRCG, by removing the top brace you can change springs, knuckles, ride height, droop and preload, all without removing the kingpins.

The MRCG's unique steering rack has been updated too. Three sets of overlapping holes in the tierod mount allow the toe angle to be changed without having to remove any parts. The tierod itself features cross bracing to make it more durable and precise. An optional steering linkage adapter for the tierod is available, for those who would rather use a ball linkage instead of the nylon tubing and aluminum tierod horn provided in the kit.

Quick-release battery system

The MRCG's innovative no-tools quick-release battery strap carries over to the MRCG1.1 with no changes. Designed with endurance racing in mind, this system keeps tweak consistent from pack to pack and allows the fastest battery changes of any 1/28 RC car. All it takes is a twist of the latch and the battery strap flips up; no need to fumble with clips, screws, or nuts any longer. As a bonus, the strap doubles as a radio tray, and the new rear steer spacers act as battery braces, keeping the pack in place even in the hardest collisions.

New wheelbase options

While the original MRCG led the market by fitting under both 94 and 98mm-wheelbase Autoscale bodies, the MRCG1.1 ups the ante by adding two more options: 96 and 100mm. For certain tracks where 94mm is too short and 98mm is too long, the new 96mm wheelbase option allows the MRCG1.1 to utterly dominate the competition. And for the largest, most wide-open tracks, the 100mm wheelbase option provides an extra measure of stability for battling against 1/24 or even 1/18 RC cars (yes, it can go that fast). With four wheelbase options, the most of any 1/28 pan chassis, the MRCG1.1 delivers maximum performance on any size track.

Accepts both hard plastic and polycarbonate bodies

The MRCG1.1 accepts both hard plastic bodies (Kyosho Auto Scale Collection, Atomic VDS and VDSII, PN Pan Car, etc.) and polycarbonate bodies. Because of its 94mm and 98mm wheelbase compatibility, the MRCG1.1 will fit any Mini-Z MR-02 body -- they clip right onto the chassis as you would with a regular Mini-Z. For polycarbonate bodies, mounting points for body posts are provided and are spaced far apart to provide extra stability to the shell (body posts not included.)

Compatible with most Mini-Z MR02 parts

Being based off the Mini-Z MR-02, the MRCG1.1 is compatible with all sorts of MR-02 option parts: kingpins, front knuckles, springs, bearing sets, motors, differentials, dampers, wheels, tires, etc. In the name of cost-effectiveness, we do not include any MR-02 parts in the kit except the disk damper system. Convert your MR-02 to an MRCG1.1 or build the MRCG1.1 kit from the ground up, the choice is all yours!

What You'll Need:
- CA glue
- Light threadlock
- Mini-Z MR-015/02 knuckles, kingpins, springs, spring perches, C-clips, ball differential,
- Mini-Z disk damper assembly
- Mini-Z top shock or oil damper
- Mini-Z MR-01/015/02 wheels, tires, bearings
- M2 locknuts (4)
- Micro servo (no wider than 23mm)
- Thin double-sided tape for servo
- Receiver and ESC (or combo)
- Receiver-compatible transmitter (and transmitter battery pack)
- Mounting tape for receiver and ESC
- 130-size motor, Mini-Z pinion
- Battery pack
- Charger appropriate for battery pack
- Hard plastic or Lexan/polycarbonate body, 94-100mm wheelbase