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1/8 Scale Nitro Monster Truck:

Thunder-Tiger MTA-4 S28 - TTR 6228 F (Radio Controlled Model)


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History, Info (and How To Set-up Tips) for the TT MTA-4 S28:


  Introduced by Thunder Tiger circa 2009, the 4WD MTA4 S28 Monster Truck - TTR 6228 F - came RTR with a Pro-28BD-R engine and 2.4Ghz radio system.

  The TT model was shaft driven, on an alloy plate chassis, with gear type differentials, 8 x coil spring over oil filled dampers, universal joint drive-shafts, two-speed transmission and a full set of ball bearings.

Thunder-Tiger MTA-4 S28
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  To race the TT MTA-4 S28, it must be fine tuned to improve handling, provide responsive steering and give you the grip to cruise around corners at high speed, without slipping off the track. Small adjustments can make a Big difference and our step by step procedure, will guide you to the best Set-up for your individual driving style.

  Our simple guide explains "run in" and what to look for as you tune the Nitro Engine for your MTA-4 S28.

  Using plain language, our guide will show you how to avoid Radio interference, and Servo Twitch, by positioning your radio receiver and implementing the latest innovations. Find out how to reduce friction and improve the performance of your TT MTA-4 S28 Bearings with a few common sense hints and tips.









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Items For Sale:






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★ Thunder Tiger MTA-4 S28 ★
Thunder Tiger MTA-4 S28

★ Thunder Tiger MTA-4 S28 Chassis ★
Thunder Tiger MTA-4 S28 Chassis


Buying a Used Thunder-Tiger MTA-4 S28
Monster Truck (and What to look for)


   Buying a used Thunder-Tiger MTA-4 S28 Nitro Monster Truck, 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 Thunder-Tiger website, or purchased separately on eBay. With an instruction manual, any problems with your model Monster Truck you may discover can easily be fixed.

Dampers
   When you receive your used Thunder-Tiger Monster Truck, 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 Thunder-Tiger 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 Thunder-Tiger MTA-4 S28 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 MTA-4 S28 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 MTA-4 S28 Monster Truck model at a competitive level, I would also recommend you obtain and fit titanium pivot shafts, turnbuckles, tie rods and steering rods.

   The gearbox of your used Monster Truck 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 Monster Truck 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 Monster Truck 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 Nitro Engine 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 Nitro Engine mount and remember to check them for security after every two or three runs.

   Ball joints always cause problems. For top level Nitro Monster Truck 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 MTA-4 S28 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 Thunder-Tiger MTA-4 S28 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 Thunder-Tiger Monster Truck 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 MTA-4 S28 model and good racing.


For More on how to Setup your Monster Truck, check out my Hints and Tips page.


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Manufacturers and Brands Catalogued and Listed by RC-Scrapyard.


   At present, the RC Model Manufacturers, Brands and Distributors covered by us are: ABC Hobby, Academy, Acme Racing, Agama Racing, Amewi, Ansmann Racing, ARRMA, Team Associated, Atomic RC, Axial, AYK, Bolink, BSD Racing, Capricorn, Carisma, Carson, Caster Racing, Cen, Corally, Custom Works, Durango, Duratrax, ECX - Electrix, Exceed RC, FG Modellsport, FS-Racing, FTX, Fujimi, Gmade, GS-Racing, Harm, HBX, Helion, Heng Long, Himoto Racing, Hirobo, Hitari, Hobao, Hong-Nor, Hot Bodies, HPI, HSP, Intech, Integy, Jamara, JQ Products, Kawada, Kyosho, Losi, LRP, Maisto, Mardave, Marui, Maverick, MCD Racing, Megatech, Mugen, New Bright, Nichimo, Nikko, Nkok, Ofna, Pro-Pulse, Protech, PTI, RC4WD, Redcat Racing, RJ-Speed, Robitronic, Schumacher, Seben, Serpent, Smartech, Sportwerks, Step-Up, Tamiya, Team-C Racing, Team Magic, Thunder Tiger, Tomy, Top Racing, Traxxas, Trinity, Tyco, Vaterra RC, Venom, VRX Racing, WLToys, X-Factory, Xmods, Xpress, Xray, XTM, Yankee RC, Yokomo, ZD Racing and Zipzaps.

   This is an ongoing project, with new and "lost in time" RC Model Brands being added as they are found and although most of those listed above have been covered in relative detail, some are still being researched and will be completed in the near future.


















Hints and Tips

Toe Angle

   When you first build your RC model car, you will no doubt have made all the settings advised in the manufacturers' manual and will take it out on the back yard not thinking of things like camber, caster or toe-in I know I did. It's only when you get competitive that you start learning about these things and just what a big difference they can make to the handling of your car. One of the more effective of these adjustments is Toe-in.

   The term, toe-in, toe-out, or toe-angle, refers to the alignment of the front or rear wheels, when viewed from above and is easily adjusted via the track rods or turnbuckles that link to the steering mechanism or directly to the steering servo horn.

   Front toe-in reduces steering when entering a corner, but improves steering response on corner exit under acceleration. On the straights, toe-in will also improve the cars stability while accelerating.

   Front toe-out will improve steering on corner entry, but makes the car unstable under acceleration on the straights and on bumpy tracks. The usual recommendation is to have up to 1 degree of either toe-in or toe out.

   Rear toe-in is generally found as the standard setting on most on-road and off-road RC models.

   More rear toe-in provides the car with more power under-steer, as well as improved stability and rear end traction. This setting is recommended for low grip tracks.

   Less rear toe-in slightly reduces steering on corner entry, but improved steering under acceleration.

   To measure toe-angle, I used to use my trusty vernier callipers to measure the width at the front of the wheels and the rear of the wheels and using this information along with the diameter of the wheels simply calculate the angle. Or, you could alternatively use this data to draw a triangle on a sheet of paper and measure the angle with your trusty school protractor.

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







Hints and Tips

Ride Height

   To allow the suspension on any RC model to do its work properly it needs to settle in a position that is somewhere between it being able to react to any bumps and holes it may encounter on the track. To do this, it needs to be adjusted to somewhere in-between those limits. That position is termed the ride height and is generally measured with the car race ready, that means with the motor and battery etc installed and is the distance between the underside of the chassis and the ground.

   Simply speaking, determining ride height is dependent on the specific track conditions. For off road models the rule is simple, the bigger the bumps and the deeper the holes, the higher the ride height. On road, the closer the car is to the track, the better it will handle.

   For 1:10 Buggys I generally recommend a starting point for ride height at around 20mm. 1:10 Trucks and Truggys, 30mm upwards, depending on the wheel diameter. For On Road models, as low as possible, but normally the setting is around 5mm.

   Ride height doesn't just affect the way the car handles uneven track conditions, it also influences the way the car handles when cornering. For a stable car, body roll must be kept to a minimum and keeping the ride height low, is by far the best and easiest way to control it.

   Before you begin to set the ride height, it is best to make sure that each pair of shocks are exactly the same length, have the same spring type and same silicone oil weight. Also, if you don't have a ride height gauge of any kind, decide what height you want set your car to and prepare some kind of slip gauge to that dimension, a book, a pen, or anything that measures to what you want. I used an old square plastic servo mount, which was exactly 5mm for my touring car. It may be low tech, but it is just as accurate as any gauge you can buy.

   To set the ride height, the race ready car must be placed on a flat surface. Slide your slip gauge under the chassis and adjust the height by adding or removing tension to the damper springs. This is done on most models by using small C shaped clips, placed over the damper, above the springs, or on a number of top of the range models, this adjustment can be made by screwing a knurled nut on each threaded damper body. As a rule if the springs are compressed by more than 25% they should be replaced by stiffer springs. The gauge should just slide under the chassis on all four corners of the chassis.

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










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