After a year and a half of successful results (3 national titles and several victories), it was the time to update the Team Magic E4RS II. That said, it was necessary to don’t “change for change”, and especially to don’t destroy what already works well. The current trend, firstly imposed by manufacturers, and now asked by the drivers, is lowering the centre of gravity. Team Magic had already previously released a car with an ultra-low centre of gravity (E4). Although the idea seems a great idea at a first glance, lowering the centre of gravity excessively can make it difficult to find a good setup.
Generally, when we lower the centre of gravity, it reduces the range of permissible variations of each other setup parameters. Thus, we can observe a phenomena of “all or nothing” on some settings, making the chassis setup more difficult for the common driver. To counter this phenomenon, other manufacturers have introduced increasingly thinner (and especially fragile) upper decks, in order to counter the lack of effort generated by increasingly lightweight packages.
At Team Magic, we long thought about this important point during the designing of our the new E4RS II Evo. And after various tests and observations, it appeared that lower the centre of gravity was actually beneficial, at the condition that it was done within reason. Therefore, it was decided to keep the shock springs to the standard length of 25mm long, because changing for shorter springs (20 mm) currently has two disadvantages:
By reducing the length of the spring by 20%, it becomes more difficult to select the good stiffness. In conditions where the handling of a car with a 25mm spring is not quite what the driver is looking for, an identical setup with an equivalent stiffness 20mm spring would make the situation worse. This is because the range of tolerance to this adjustment will be smaller. Currently, 20mm springs, which for sure will be the future standard in RC design, are not widespread and the quality of springs in this size is still not of a high enough standard.
It was very difficult to lower the centre of gravity of the E4RS’s other components without significantly compromising their durability. For example, reducing the motor mount to use only the two lowest holes on the motor could result in damaging these elements, and especially the spur gear due to the high torsional stresses generated by such a system. This may not be a concern for a top level driver that never exceeds track limits, however it may pose problems for a “club” level drivers… and at Team Magic, we want to make cars for all drivers, not only for the elite.
After carrying out test on a variety of tracks and surfaces, we opted for a slightly narrower chassis with an optimized shape and chassis cut-outs.
The High-Grade carbon used by Team Magic has always represented something special, almost unique. Generally this carbon, with its finest braiding fibers, has been dismissed from the RC industry due to its higher cost. However, it allows for a more consistent chassis flex movement and less rigidity for its thickness. It is for these characteristics that it has been chosen by Team Magic, in addition to its aesthetic pleasing appearance.
The main features of the E4RS II Evo’s chassis include:
- Narrow High Grade 2.3mm woven graphite chassis.
- Optimization of the shape and cuts under the differentials and the centre layshaft.
- Mounting holes optimized for the new one-piece servo mount.
- New clearance zone under the front belt to prevent all risk of contact with the chassis.
The general shape of the chassis has very little changed, to avoid losing the excellent performance the E4RS II already has. Additionally, the milling under the motor was also added under the battery*WPV, which resulted in an absolutely symmetrical flex, which seemed essential.
As with the chassis, many tests were made on various tracks and surfaces (asphalt and carpet) in order to determine the ideal upper deck that would perfectly complement the E4RS II Evo chassis in order to offer the best compromise of flex possible out-of-the-box. We arrived at the conclusion that a 2mm thick top plate, along with an updated shape, would allow the most versatility.
By “best compromise of flex possible”, we mean a flex that allow to run on the most commonly encountered tracks and surfaces by the average driver. With the various settings of flex options possible on the E4RS II Evo, without changing the chassis or upper deck, it was actually possible to be very consistent on the vast majority of tracks that we tested on. For more specific applications, optional 2.3 mm and 2.5 mm thick upper decks are also available, mainly for very high grip tracks and/or the use of foam tires.
Floating Servo Mount:
Team Magic tested several different servo mounts. Originally, the E4RS II was delivered with a traditional servo mount comprising of two aluminium posts. However this reduced the chassis flex (as on all the cars using this servo mount format). As a result, certain drivers found themselves rectifying this issue by leaving only the central post and using double-sided tape to secure the servo to the chassis.
Late in the summer of 2012, K-factory offered an optional 3-part “floating” servo mount. Although the results were satisfactory in terms of optimizing chassis flex, the servo’s neutral positioning was not consistent; as was the case on almost all 1/10 touring cars at the time.
We therefore sought to minimize the play on the servo. It was observed that one-piece type mounts, secured on the centerline of the chassis with two screws and a guide, provided a better fit. Team Magic created an even more rigid and durable guide, with rectangular shape as oppose to a simple “point” in the chassis. After a number of tests, this solution was nominated over the others because it provided the most satisfactory result; the servo mount guiding and chassis flex were more adequate than all other solutions tested. This new servo mount is supplied with four bespoke aluminium screws specially machined to maintain the servo in a perfect position on the one-piece mount, another innovation by Team Magic.
Motor mount and centre layshaft:
The first step was to find the best possible mounting solution for the centre layshaft. Several tests were made, and both prototypes have been created before the final version.
It is important to obtain a perfect mount in order to avoid all micro-blockages due to the movement of the chassis flex and to achieve a consistent and free moving transmission. Therefore, it was decided to retain the 5x10x4mm bearing size following some less conclusive tests with 4x8mm bearings. On the other hand, the two piece bearing seating solution was abandoned because it was found that this system creates too many constraints when using powerful motors.
Concerning the motor mount itself, we wanted to lower the centre of gravity and to centre the motor more towards the chassis centerline. After a number of tests, it became apparent that the use of the two lowest screws on the bottom of the motor was not a viable solution. Indeed, this represents too many constraints on the motor can. If it is an appropriate package for the top driver who never exceeds track limits, it’s completely different for the average driver who may quickly deteriorate the condition of their motor, their motor mount, as well as their spur gear as a result of impacts. It was therefore decided to use a fixing point at 3/5 of the height of the motor. The user is, however, still free to use the lowest two holes but it’s something that should be of very little benefit.
Lateral adjustment of the motor position:
It’s one of the main innovations offered by the Team Magic E4RS II Evo. The lateral positioning adjustment of the motor*LT has been created to allow to better refine the balance of the car, and especially to allow the most basic motor to be easily installed on the E4RS II Evo.Certain competition motors manufacturers use rounded corner cans in a way quite pronounced on the front plate of the motor, some brands have yet almost right angles at this location.
We could propose a standard and determined in advance mount, depending on the position imposed by “the worst motor”. But we wanted to propose a fixation also allowing “the best of the motors’ to be closer to the ideal position. Today, Team Magic is one of the only manufacturers to offer this kind of very precise adjustment.
Revolutionary E4RS II Evo 3D Flex system:
Some would argue that this system already exists in the 1/8 circuit class, but it’s actually very different on the Team Magic E4RS II Evo: the upper deck is permanently attached to the front and rear bulkheads, contrary to what is done in 1/8. Therefore, the flex is still controlled by the upper deck and by the choice of the used screws location.
The 3D Flex system *WPV that was developed in the last months of development allows to maintain the lateral flex of the chassis, while limiting its longitudinal flex. Current touring cars do not connect the centre layshaft mount to the upper deck (flex choice) which creates some issues for the rear belt tension: in this configuration, there is nothing that prevents the rear differential moving closer to the layshaft under strong motor torque inputs.
With the 3D Flex system, the upper deck can neither forward nor backward with respect to the motor/layshaft mounts; which ensures the correct and consistent belt tension when removing the screw between the upper deck and the centre layshaft mount. This is another innovation by Team Magic.
The E4RS II’s gear differential of was adequate quality to the majority of drivers. However, for certain top level drivers in Open or Modified categories using extremely powerful motors, the lack of a second set of satellite gears was prominent. To counter this phenomenon, it was decided to integrate 4 satellite gears instead of 2, which also allows the use of thinner oils than with only 2 gears. Team Magic has therefore completely redesigned its differential in order to not only incorporate 4 gears instead of 2 but also to make it more compact and lightweight. Everything has been redone and composite gears were specially created.
The result is excellent: the Evo’s new differential is more compact, lighter by 16% and is also a little more free in comparison to its older counterpart. It allows the use of a wider range of oils, from 700 to 1’200 CST (instead of 1’000 to 5’000 CST for the 2 satellite gears version).
Another innovation, the screw holes in the differential case are unclosed. This is designed to avoid any pressure under the screws (especially when oil enters the hole) and thus guarantee a better sealing of the differential while increasing the life of the thread made in the plastic. Another exclusivity by Team Magic!
The shock absorbers are a critical aspect of a 1/10 touring car. Those on the E4RS II functioned very well. There was therefore no need to modify them at the structural level, just eventually optimize the pistons in terms of the quantity and the diameter of the holes.
For the E4RS II Evo, we have chosen to lower the most possible the center of gravity without making it excessive. This was achieved by a decrease in the overall length of the shock absorbers. However, we kept in mind that it was essential to keep our shock absorbers compatible with standard 25mm springs (and, as long as the shorter springs are not widespread).
If we had further reduced the length of the shock absorbers, we would have been forced to use 20mm springs, which would have deprived users of many setup possibilities. Therefore, we worked solely on the spring adjuster ring, the cap, the body, the joints, the ball cups, in order to reduce the overall length without losing any performance.
The result is perfect; we were able to decrease the shock absorber fixing by approximately 5mm. This is not “spectacular” on the paper, but this has the huge advantage in terms of being able to use all the standard 25mm springs that generally give good results. As a result, the user will not have to compromise the position of the shock absorber or to have to modify their suspension arms.
Lowered and optimized center of gravity:
At Team Magic, we long thought about lowering the centre of gravity. And after various tests and observations, it appeared that lowering the centre of gravity was actually beneficial, though it must be done in a controlled and thoughtful manner. The result of lightening of each of these parts that are above the centre of gravity was a significantly lowered centre of gravity. It was important to not fall into the ‘excess trap’ in order to maintain the widest possible range of settings and to avoid the “all or nothing” phenomenon. Therefore, we opted to retain the 25mm springs as well as middle hole on the motor mount.
We have therefore worked on four points:
- Reduce the weight of the shock absorbers by 9% as well as their length.
- Reduce the weight of the shock towers by 18% as well as their height.
- Reduce the weight of the motor mount and middle axle mounts by 21%.
- Reduce the weight of the gear differential by 16%.
Centred and realigned weight distribution:
The E4RS II EVO’s weight distribution has been centred and realigned to the extreme, thanks to a new position of the battery more close to the centerline of the car, and the new motor mount described below on this page. The space difference between the motor and the battery, which was 23mm on the E4RS II, is reduced to 16mm on the EVO. It is impossible to further reduce this gap, because these 16mm are used by the motor shaft. Further reduce this space would result in contact between the rotor and the battery case!
Perfectly symmetric flex:
It is difficult not to notice that a non-symmetric chassis inevitably creates a non-symmetric flex. At Team Magic, one of the first elements of the specifications of the E4RS II, was to create a car with the most symmetrical flex possible. One of the features of the Team Magic E4RS II is the symmetric cut of the chassis, including the reaming under the motor, which was also done under the battery pack *WPV. Some people spoke about an error in the CNC program, others thought that we could choose on which side the motor can be installed; but that wasn’t the case: the idea is much simpler and more obvious than it: the target was just to avoid an asymmetric zone on the chassis. After a year and a half of use with the E4RS II, it’s more than obvious that this technical choice is an undeniable asset in the search of a symmetrical flex.
“Zero Flex Interference” concept:
The main idea behind the “Zero Flex Interference” concept*LTwas avoid certain parts interfering with the car’s flex when some flex setup options are not used. When all the screws are in place for the flex setting, are not in contact with the chassis or the upper deck if unused. These parasitic contacts eliminated, the flex movements are highly more natural and more predictable in its handling. And if you want to use these points to change the flex, simply insert a spacer between the part and the chassis or the upper deck, so that the contact is effective again.
New central flex point:
In order to set the flex more precisely, two new central flex points have been added to the centre of the car, just in front of the transmission and on the middle of the car.
3D Flex system:
The 3D Flex system*WPVallows to maintain the lateral flex of the car, whilst limiting the longitudinal flex. With the 3D Flex system, the upper deck cannot move forward or backwards from the motor mount / layshaft mount which maintains a correct and consistent belt tension. This is another exclusive innovation by Team Magic.
Narrow High Grade 2.3mm graphite chassis:
The High Grade 2.3mm woven graphite chassis offers an excellent compromise in terms of flex. High Grade carbon offers a much finer weave in comparison traditionally used carbon in RC, which allows a better consistency of the flex movements, and offers a better balance of rigidity in comparison to its thickness.
High Grade 2mm graphite upper deck:
The 2mm High Grade woven graphite upper deck is the perfect complement to the 2.3mm thick chassis. Together, they offer a excellent compromise for many tracks and surfaces.
High Grade graphite shock towers:
As the chassis and the upper deck, the shocks towers are machined in high quality High Grade woven graphite. Many setting holes allow to optimise the position of the shock absorbers in relation to the grip and the configuration of the track.
Mirror polished short dampers:
The new short dampers have an ultra smooth miror finish in order to obtain a perfect softness and freeness of movements. Despite their smaller size, the E4RS II Evo dampers allow the use of standard sized springs (25mm).
Titanium coated shock shafts:
The titanium-coated shock shafts provide an excellent durability as well as a constant free movement.
Kfactory matched shock springs:
The springs provided with the E4RS II Evo’s dampers of are Kfactory matched springs. The #25 springs feature 6.5 coils made with 1.4mm wire, which is a common choice for the rear; while the #27 front springs also feature 6.5 coils, they are made with a 1.5mm wire, which are a perfect complement of the rear springs. This choice of springs provides a good handling on tracks with a medium level of grip.
Anti-roll bar mounts:
The new anti-roll bar mounts provide a better guidance and a better freeness of the bars on the bulkhead. On the arm mount, the rear links now feature the same ultra-fine symmetric anti-roll bar settings of the as the front.
As the E4RS II’s lower bulkheads gave such satisfactory results in terms of design, of suspension arms mount and of differential position, as well as the chassis flex offered by the bulkhead; that we decided not to change anything, despite the fact that the machined aluminium parts are by far the easiest to modify (lack of cast mould). It is important to note that “Zero Flex Interference” concept*LT requires a spacer under a number of holes (under the differential and second front fixation point) if you decide to use these points. This is to avoid any contact between the chassis and the disused fixing points in the bulkheads. To reduce the number of spare parts, the front right and left lower bulkheads are identical.
The upper bulkheads have been slightly modified in order to provide an additional camber rods mounting point to optimize the roll centre. To reduce the number of spare parts, the front and rear upper bulkheads are identical.
Hard suspension arms and uprights:
The plastic suspension parts were reinforced several months ago in order to provide more rigidity and precise control of the suspension movements. As a result the front and rear arms, steering blocks and uprights now feature an increased ratio of graphite. The difference is quite obvious compared to the original parts. Please note that the original E4RS II arms (in “medium” material) are still available and are an interesting setup alternative for the tracks with low grip.
Hard plastic caster blocks:
To reduce the “non-suspending” weight, Team Magic chose to replace the aluminium caster blocks of the E4RS II with hard plastic blocks. The use of hard plastic perfectly complements the rigidity of hard arms, uprights and steering blocks. The hard plastic caster blocks also better absorb the shocks than the aluminium version, which reflected the strength of the impact on adjacent parts (steering-blocks and arms).
Fully adjustable arm mounts:
The suspension arm mounting blocks are made from moulded nylon parts, as is done by two other top manufacturers. We have chosen this more reliable solution than simple aluminium parts fixed directly to the chassis in order to provide a more durable and consistent car. The nylon mounting blocks are better at absorbing impacts. They may eventually break, however they don’t will bend unlike aluminium parts which have this problem. Replacing them is easy; as a result, it is cheaper and easier to maintain a perfect car geometry. Another crucial advantage: they allow a range of settings in terms of geometry angles (in-board toe in/out and anti-squat / anti-dive angles). These two benefits appeared us to be significant enough to decide to create an expensive mould for nylon arm mounting blocks instead of choosing a cheaper solution such as simply machining aluminium parts.
Hard coated suspension shafts:
The suspension shafts are hard coated polished steel, in order to ensure perfect alignment and movements without any hard points. The outer shafts feature a flat spot in order to ensure a perfect grub screw fit on both the front caster blocks and rear uprights.
Adjustable suspension shaft position:
Through the use of nylon suspension arm mounting blocks that are directly fitted to the bulkheads, the position of these is fully adjustable. Therefore it is not only possible to adjust the roll centre through the height of the arms but also by the distance that separates them from the bulkheads, so it is also possible to adjust toe in a very precise manner, unlike cars that use simple aluminium mounts that are screwed to the chassis.
Aluminium 7075 one-piece floating servo mount:
The new one-piece mount, perfectly adapted to suit standard low-profile servos that are on the market (Sanwa, Futaba, KoPropo), has been specially designed for precise fitting without any unwanted play. The perfect alignment of the servo mount is ensured by a rectangular lug in the chassis and secured by two countersunk screws; in order to avoid the usual pivoting problems of that are usually found on cars by other manufacturers.
Ball raced steering bellcrank:
The Team Magic E4RS II Evo is one of the 1/10 Touring cars that features on of the most accurate and free steering system of the market. The steering system is mounted with ball bearings on both steering arms as well as the central link, resulting in an ultra-fast and precise steering movement without any hard points.
Laterally adjustable motor mount:
The lateral adjustment of the motor position *LT has been created to allow the driver to finely tune the balance of the car, and especially to allow the most basic motors to be mounted on the E4RS II Evo. Certain competitions motor brands use motor cans with rounded edges on the side on which it is secured to the motor mount, other brands use almost right angled edges. Certain brands only offer a standard and fixed mounting position where “the worst motor” requires it, we decided to offer a position allowing “the best motor” to be closer to the ideal position. To this day, Team Magic is the only manufacturer to have this feature.
Optimized middle layshaft mounting blocks:
The new centre layshaft mounting blocks are made of 7075 aluminium, allow for a perfect transmission movement. Thanks to a perfect ball bearings movement, the general freeness of the transmission is improved as well as the durability of the bearings at this point.
CNC machined Delrin spur gear:
Where other brands deliver their 1/10 Touring cars with a simple moulded nylon spur gear, Team Magic includes a Kfactory CNC machined Delrin spur gear! Two crucial advantages to this: Delrin is a material with very low coefficient of friction and wear and the machined spur gear is always perfectly round, unlike the moulded ones. This is top quality part provided by Team Magic with its E4RS II Evo kit.
“Low Friction” belts:
Belts provided by Team Magic are “Low Friction” models, ensuring an extreme freeness and smoothness of transmission on the E4RS II Evo. Team Magic chose the Japanese leader of the manufacturing of transmission belts, rather than turn to low-cost Chinese suppliers, as to once again to ensure a quality of the highest level.
Belt tension eccentrics adjusters:
Team Magic chose to colour their belt tension eccentric adjusters in orange; not to look pretty, but to stand out visually of the black bulkheads and to allow to users to check which tension notch is the eccentric positioned at a quick glance. Orange being the basic colour of the Team Magic logo, the colour contrasting perfectly with black was quickly found.
Front spool with steel outdrives:
The E4RS II Evo is delivered with a front spool and hard coated steel outdrives. The steel outdrives allows the use the most powerful modified motors without any problems of durability. It is an undeniable advantage for a competition kit. The main part of the spool is machined in hard treated 7075 hard aluminium, for the highest possibly reduction in weight.
Gear differential with composite gears:
The E4RS II Evo’s new differential of the will quickly become a reference in gear diffs. Now delivered with 4 moulded composite satellite gears, this new ultra compact differential is very light and efficient. The double gasket system ensures the differential’s perfect seal and the diff case is moulded with four unclosed screw holes in order to avoid any negative pressure under them for a greater durability of the screw thread in the main differential case.
Front double-jointed driveshafts:
The front driveshafts delivered with the E4RS II Evo “Spool Version” are double-jointed and machined in hard treated steel. The double-joint system allows higher angles of steering and greatly reduce the “chatter” that the front drivetrain generates with standard CVDs.
Rear CVD hard treated driveshafts:
The E4RS II Evo’s rear driveshafts are made from hard treated steel for extra durability, even with the most powerful modified motors. The rear driveshafts of the E4RS II Evo are machined in hard treated steel
Aluminium 7075 wheel hex adapters:
The E4RS II Evo’s wheel hex adapters are clamp type and machined in 7075 Aluminium. The clamp type hex adapters avoid any undesirable play around the pin which would could force and restrict the wheel hub at high stresses.
Quick release battery holder:
The E4RS II Evo also features a quick release battery holder with a Velcro strap. Some say that this system is not good, that it interferes on the chassis flex unlike fiber tape which does not, but after extensive testing we can say that it’s exactly the opposite: the Velcro strap perfectly holds the battery in place in its retainers without forcing or over stressing the assembly. This fixation is also a more economical and ecological solution compared to fiber tape.
E4RS II Evo Battery retainers:
The battery retainers allow the battery to maintain perfectly positioned both laterally and longitudinally on the chassis without interfering in the chassis flex as do certain alternative retainers (notably systems with screws on the servo and motor mounts). The retainer plates are machined in High Grade carbon and are adjustable in three longitudinal positions.
Low Friction ball bearings:
The ball bearings delivered with the E4RS II Evo kit are Low Friction. They are also supplied lubricated with oil, instead of grease, for increased transmission freeness.
Heavy duty body posts:
The E4RS II Evo’s body posts are heavy duty with a 6 mm diameter. They offer great stability and rigidity of the body fixings. The body height is, of course, adjustable in a precise manner.
High density foam bumper:
The nylon bumper plate is supplemented with a high-density foam with respectable thickness. We thought to reduce the thickness of the foam in order to reduce the weight and the centre of gravity. However, the gain from such a change was negligible compared to the loss of protection in case of crash that we decided to keep the foam at its original thickness as to protect your kit.
Team Magic E4RS Evo II Features:
- NEW – Lowered and optimized centre of gravity
- NEW – Centred and realigned masses
- Perfectly symmetric Flex
- Exclusive “Zero flex interference” concept
- NEW – Central flex points
- NEW – 3D flex system (optional)
- NEW – Narrow High Grade 2.3mm woven graphite chassis
- NEW – High Grade 2.0mm woven graphite upper deck
- NEW – High Grade woven graphite shock towers
- NEW – Mirror polished short dampers
- NEW – Titanium coated shock shafts
- Kfactory matched shock springs
- NEW – Optimized anti-roll bar mounts
- Aluminium 7075 lower bulkheads
- NEW – Aluminium 7075 upper bulkhead with optimized roll center
- NEW – Hard suspension arms and uprights
- NEW – Hard plastic caster blocks
- Fully adjustable arm mounts
- ST steel hardened suspension axle
- Fully adjustable arm positions and angles
- NEW – Aluminium 7075 one-piece floating servo mount
- Aluminium 7075 ball raced steering bellcrank
- NEW – Aluminium 7075 laterally adjustable motor mount
- NEW – Aluminium 7075 optimized center layshaft mounting blocks
- Aluminium 7075 hard coated spur gear holder
- CNC machined Delrin Spur Gear
- Low Friction belts
- Adjustable belt tension via eccentrics
- NEW – Front spool axle with hard treated steel outdrives
- NEW – Gear differential with 4 composite gears
- NEW – Front double-jointed driveshafts
- Rear hard treated steel CVD driveshafts
- Aluminium 7075 wheel hex adapters
- Quick release battery holder
- High Grade graphite battery retainers (3 positions)Low Friction ball bearings
- Heavy duty body posts
- High density foam bumper
Team Magic E4RS II Evo Pictures: