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Tamiya EBBRO BTEC Maziora 350R - #58389 (Radio Controlled Model Review)

1/10 Scale Electric Touring Car - TA-05 IFS Chassis:

  Released by Tamiya on June 20, 2007, this TA-05 IFS Chassis based RC Model is of the EBBRO BTEC Maziora Vemac 350R that was EBBRO Team Nova's entry in the GT300 class for the 2007 Super GT season.

  The Lexan body shell is a detailed representation of the cars racing lines. Decals of the EBBRO livery are included in the kit.

Tamiya EBBRO BTEC Maziora 350R - #58389 TA05-IFS
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  The 4WD, belt driven TA-05 Chassis design employs two pressure plate ball differentials, fully independent double wishbone suspension with coil spring over oil filled shock absorbers. A full set of steel shielded ball bearings and turnbuckles for camber and tracking adjustment are also included in the kit.

  The ultra low centre of gravity and centrally mounted motor, spur gear and pulley coupled with the in line battery position provides excellent balance to the car whilst the matching front and rear differentials and casings utilising equal length drive belts keep costs low.

  The TA-05 IFS (Inboard Front Suspension) version of the TA-05 employs a laydown shock system mounted behind the front gearbox to allow for lower nosed body shells.

  Out of the box this chassis has excellent precise steering and road hugging cornering ability. After only a few simple tweaks this chassis is a sure winner.


      Rating: 44 Stars out of 5 Reviewed by: RCScrapyard     Manual.

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Tamiya EBBRO BTEC Maziora 350R #58389 TA05-IFS - Chassis
Tamiya EBBRO BTEC Maziora 350R #58389 TA05-IFS Chassis
Tamiya EBBRO BTEC Maziora 350R #58389 TA05-IFS
Tamiya EBBRO BTEC Maziora 350R #58389 TA05-IFS Front

Buying a Used Tamiya EBBRO 350R
Touring Car (and What to look for)


   Buying a used Tamiya EBBRO 350R Electric Touring Car, or any used RC Model, has a number of advantages. It is generally cheaper than new, ready built and may come with a variety of expensive hop-ups already installed. Cheap, pre-loved bargains are always becoming available. However, depending on the age of your purchase, it may need a little tender loving care before you can take it out on the back yard.

   The one thing you will always need is an instruction manual. If not supplied with your purchase, they can often be downloaded from the Tamiya website, or purchased separately on eBay. With an instruction manual, any problems with your model Touring Car you may discover, can easily be fixed.

Dampers
   When you receive your used Tamiya Touring Car, make a general visual inspection of the chassis, front and rear wishbones, suspension shock towers etc, for any broken parts that may need to be replaced. Then, take a screwdriver and box spanner and check each self tapping screw and nut for security, taking care not to over tighten.

   Next, for those Tamiya models with oil filled shock absorbers, remove them from the chassis and dismantle the coil springs. The damper shafts should push in and pull out with a smooth action. If you feel a jolt as you change direction, this means the oil has leaked out and must be topped up. At the same time, change the O-Ring seals to prevent more leakage. Also check the damper shafts for damage. If they are scratched, change them as soon as possible.

   If the body shell of your Tamiya EBBRO 350R is broken, ripped or damaged in any way, this can be easily repaired with rubber solution glue. Also, for added protection and if available for your EBBRO 350R model, fit an under guard to stop dirt and gravel entering the chassis.

Titanium Turnbuckles
   Examine the drive shafts for wear and replace as required. If possible, change them for titanium. The steel shafts wear and bend too easily.

   If you intend to race your EBBRO 350R Touring Car model at a competitive level, I would also recommend you obtain and fit titanium pivot shafts, turnbuckles, tie rods and steering rods.

   On Belt driven models, the Drive Belts need checking at regular intervals for wear, tension and damage. If deemed necessary, adjust the tensioning pulley until the belt can be depressed in the centre by no more than around 5mm. If the belt was slack, also examine the drive pulleys for wear. The teeth should provide a well seated fit for the belt teeth and not be rounded on the corners. If the belt teeth do not fit snugly, change the pulleys as soon as possible. For top level racing it may be prudent to replace all belts and pulleys after each race meeting.

   For Gear driven models, the gearbox of your used Touring Car should be opened up to check for gear wear and lubrication. A thin coat of grease is often used on internal gears and although this is fine for basic running around on the back yard, if you intend to race your Touring Car at a higher level, this should be removed and replaced with racing oil (ZX1 or Teflon Oil). Of course, this should be reapplied after each race meeting.

Spur Gears
   Gears are a weakness on all Touring Car RC models. Head on collisions can easily damage the gear teeth on nylon and plastic spur gears. Heavy impacts can also loosen the nuts or self tapping screws that hold the Electric Motor in Position, allowing the pinion gear to pull out of mesh slightly and rip the tops off the teeth on your spur gear. To minimise this possibility, fit bolts with locking nuts to the Electric Motor mount and remember to check them for security after every two or three runs.

   Ball joints always cause problems. For top level Electric Touring Car racing, the plastic ball connectors should be checked and if deemed necessary, changed after every meeting. A simple thing like a loose fitting connector popping off, could easily end your race, so better safe than sorry.

Servo Gears
   The EBBRO 350R steering servo is also prone to damage. In high speed crash situations, the fragile gear teeth of the servo can be broken off, rendering your expensive servo useless, so be sure to obtain a good quality "Servo Saver". Check out my Servo Information article.

   If body roll on your Tamiya EBBRO 350R is a problem, handling can be improved with the use of stabilizers, anti roll or sway bars, stiffer tuning springs and, or, thicker silicone oil in the dampers.

Ball Bearings
   If your used Tamiya Touring Car comes with plastic and sintered brass bushings (ring type bearings), check the shafts that run in them for wear. Dust and grit can get into these bearings and abrade the shafts. Therefore, you should replace them all with shielded ball bearings. If the model has been run with ring type bearings, you may have to change all the axles and driveshafts. For more information, take a look at my article, How to get the best from your Bearings.

   Finally, good luck with your EBBRO 350R model and good racing.


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Tamiya EBBRO-350R


Hints and Tips

Painting a Lexan Body Shell.

   Most RC Model kits come with an unpainted, clear Lexan plastic Body Shell you yourself must prepare and paint. This type of Body Shell is painted on the inside and special spray or brush on Polycarbonate Paints MUST be used.

   The beauty of this is you can go wild and show off your artistic ability, or simply choose your favourite colour and add some choice decals later.

   This article is for those who have never done this kind of thing before and need some basic guidance.


   Firstly, cut off the waste from the body shell with sharp scissors. If required finish off the rounded wheel arches with smooth sandpaper wrapped around a drinks can.

   Any holes for body posts must also be drilled before painting. Place the clear body shell over the model and adjust the posts so the shell is in the desired position. Where the posts touch the shell make a small dot with a marker pen.
Next, pierce small holes in the shell where the dots are from the inside. Place the shell on an old piece of wood and drill the post holes, again, from the inside.

   The next thing to do is clean it inside and out. Any small amount of impurity such as oil or grease could impair the adhesion of the paint.
For this, fill a bowl with water and use a small amount of washing up liquid with a soft sponge. Never use a scourer. Rinse well to ensure no residue remains.

   Most Body Shells come with a set of sticky back paper masks for the windows etc that are positioned on the inside. If not supplied, you will have to either make your own, or use masking tape. Run your thumb nail around the edges of each mask to ensure contact paint can creep into any open area and easily ruin your hard work, so please be vigilant.

   Tip: To protect against paint spilling out onto the outside of the body shell, use masking tape around the outside edges and wheel arches.

   Now you are ready to begin applying your paint. Find a well ventilated area and if spraying, use a breathing mask.
Three or four sprayed, or at least two brushed layers are recommended allowing around thirty minutes between layers.

   Once the paint is fully dry, to protect the paint from scratching, spray or brush over it with one or two layers of clear plastic varnish.

   When the varnish is completely dry, carefully remove the window masks. If necessary, use a modelling knife to lift an edge to grasp between your thumb and finger DO NOT RUSH.

   Decals can now be placed on your body shell. So they adhere better I recommend any square edges are rounded. This reduced the tendency for them to peel off.

For More Setup Information check out my Hints and Tips page.



Ball Differentials


   Ball differentials were developed in the late 1980s to replace the high friction Gear differentials. Mainly used on Tamiya Touring Cars, Le-Mans and Formula One Cars, Ball Differentials are designed to be totally frictionless and smooth in action to provide effortless drive to the wheels on cornering, where the inside wheels must rotate slower than the outside wheels for controlled stability.

   Basically, the configuration of the Ball Differential is a number of small case hardened steel balls, spaced in a plastic cage that is in effect the drive gear for the axle. On each side of the gear are two hardened and tempered pressure plates that clamp over the steel balls, held in position by a screw through the centre of the assembly, incorporating a small thrust bearing and coil spring. The adjustment of this screw is crucial to the effectiveness of the differentials action. Too tight and the free movement of the diff is restricted. Too loose and the balls will slip on the plates when accelerating out of the corner, not only reducing drive, but damaging the balls and pressure plates not good. The optimum setting is obviously somewhere in between and is where the small coil spring is important. It must be compressed, but not fully, to provide the desired exact pressure required. With a little practise setting up the diff become second nature. Patience is the word for this procedure.

   Lubrication of Ball Differentials is essential for that smooth operation and special greases have been developed that allow the balls to roll freely in the cage and push aside as they roll over the pressure plates.

For More Setup Information check out my Hints and Tips page.









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