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RCScrapyard Radio Controlled Models
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1/8 Scale Electric Buggy:

Duratrax 835E - DTXD78** (Radio Controlled Model Review)


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History, Info (and How To Set-up Tips) for the 835E:


  Introduced by Duratrax in 2013, the 4WD 835E Buggy - DTXD78** - came RTR with an Onyx 2200kV brushless motor, ESC and 2.4GHz radio system.

  The EP model is shaft driven on a composite chassis, with gear type differentials, coil spring over oil filled dampers, rear dogbones, with front CV universal joint drive-shafts, sway-bars and a full set of ball bearings.

Duratrax 835E - 1:8 Electric Buggy
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  To race the Duratrax 835E, it calls for fine tuning to attain better steering response and improve grip when cornering so you don't slide off the side of the track. Minute changes can make huge advancements. Our easy to understand list will show you how and lead you to the optimum Set-up to put you in front of the rest on the track.

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★ Duratrax 835E ★
Duratrax 835E

★ Duratrax 835E Chassis ★
Duratrax 835E Chassis


Buying a Used Duratrax 835E Buggy (and What to look for)


   Buying a used Duratrax 835E Electric Buggy, 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 Duratrax website, or purchased separately on eBay. With an instruction manual, any problems with your model Buggy you may discover can easily be fixed.

Dampers
   When you receive your used Duratrax Buggy, 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 Duratrax 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 Duratrax 835E 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 835E 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 835E Buggy 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 Buggy 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 Buggy 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 Buggy 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 Buggy 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 835E 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 Duratrax 835E 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 Duratrax Buggy 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 835E model and good racing.


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Or, check out our RC Model Car Setup Guide


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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.





















Duratrax DXR8-E - Chassis
Duratrax DXR8-E - Chassis - 1:8 Electric Buggy


Hints and Tips

Shock Mount Settings

   The combinations of Shock settings available on the majority of on and off road cars are far too many for this article to cover, so I will endeavour to explain some of the basics, that should give you some idea what these changes might achieve. Some of the settings suggested may not be available on all RC model cars.

   If you look at the lower wishbones of you model, you may see a number of holes alongside where the ball studs for the dampers are positioned. If you were to remove those studs on the rear wishbone and reposition them in the hole further out from the center of the car, the first thing you will notice is the ride height has dropped, this can be corrected by adding C spacers above the springs. The second thing you will notice is the shocks are more sluggish, this can be compensated by using thinner oil. If this adjustment is made on an off-road car, it can be advantageous for landing after big jumps, providing improved stability due to the increased hydraulic pack in the shocks (as described in my previous article). This setting can also improve the way cars handle small bumps and dips in the track, due to the softer static damping.

   Changing the mounting hole positions used by the dampers, on the wishbone or on the shock tower, will always change the angle the dampers lay. This angle is what changes the characteristics of the shocks in that they will react to different track types and conditions. The above example is just food for thought, for those looking to improve their cars handling in relation to any other settings, such as caster, camber, toe-in etc, they may have previously made on their car. The only way to really get to grips with this subject is through trial and error.

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







Hints and Tips

Choosing a Transmitter

   When you first started in RC, you may have purchased a package that came with the car kit, motor, battery, charger, ESC and radio system complete. The transmitter was probably just a basic steer wheel, or stick type, with nothing more than forward, reverse, left, right and simple trim settings to centralise the servo and ESC.

   After a while, as your enthusiasm grows and your experience increases, you will want to move on to a better radio system, with more setting options, but where do you begin?

   Choosing the right transmitter is a personal thing. It has to feel right, have the balance you like, not be too bulky for your hand size and have all the features you might need to set up your car to your driving style.

   Transmitters these days are highly sophisticated pieces of engineering and once you choose your transmitter you will probably stick with it for the rest of your competitive career.

   Don't just go for the one you see in a review that looks and sounds like the best thing there could ever be and comes at a bargain price. Then when it arrives through the post and you get it in your hands it just doesn't have the feel you thought it would have. Sits awkwardly in your hands and is so complicated to set up you need a university degree to understand it.

   Talk to the experienced racers at your local track, ask them their opinion, see what their transmitter is like and if they will allow you to, hold it in your hands and see how it feels. All the best buys in life are made by recommendation. Then, once you have some idea what you are looking for, look on the internet for that model to get the best price, or go to a dealer and check out the latest models.

   Frequency choice depends on where in the world you live and what form of RC you are into. Fortunately, most of the top end transmitters can change to different frequency ranges by simply fitting a different module, so if you ever move up to an international level, you don't have to buy a new transmitter, just a module and receiver.

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










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