RCScrapyard ► Iconic Vintage Radio Controlled (RC) Model Car Archive ► Duratrax Nitro-Demon.
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1/8 Scale Nitro Truck/Truggy:

Duratrax Nitro-Demon - DTXD75** (Radio Controlled Model Review)


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History, Info (and How To Set-up Tips) for the Nitro Demon:


  Introduced by Duratrax in 2000, the 4WD Nitro Demon Stadium Truck, was available RTR - DTXD75** - with a Torq .21 engine and AM radio system.

  The model is shaft driven, on an alloy plate chassis, with 3 x gear type differentials, coil spring over oil filled dampers, rear dogbone, with front universal joint drive-shafts and a full set of ball bearings.

Duratrax Nitro-Demon
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  To race the Duratrax Nitro Demon, 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.

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★ Duratrax Nitro Demon ★
Duratrax Nitro Demon

★ Duratrax Nitro Demon ★
Duratrax Nitro-Demon

★ Duratrax Nitro Demon Chassis ★
Duratrax Nitro Demon Chassis


Buying a Used Duratrax Nitro Demon Truck (and What to look for)


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

Dampers
   When you receive your used Duratrax 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 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 Nitro Demon 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 Nitro Demon 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 Nitro Demon 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 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 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 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 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 Nitro Demon 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 Nitro Demon 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 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 Nitro Demon model and good racing.


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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

Driving On Road

   The basic driving style most commonly used for all forms of on road, tarmac and carpet racing, involves using the full width of the road available and cutting each apex as tight as possible, whilst keeping complete control of the car on the track. The style, often referred to as "Rounding" looks quite simple to those watching, but to get it right needs good hand eye coordination and lots of practice.

   Consider a 180 degree turn. Start with the car positioned towards the outside of the track, then as you approach the corner brake hard and as smooth as you can, guide the car across the point of the apex, gently sweeping round until you are approximately 75% around the corner. At this point, gradually increase the throttle out of the corner, maintaining control and guiding the car to the opposite outside line. By the time the car is straight on the track, you should be at almost full throttle, before you brake hard again for the next corner.

   Developing this driving style comes in stages. Don't try to run before you can walk, install a low powered motor and practice, practice, practice until it becomes second nature. Then, as your skills improve, try something with a little more power.

   Initially set your transmitter to aggressive breaking and gradually reduce this as you get the feel of the car around the corner. Remember, the faster you enter a corner, the faster you exit it.

   When you first try out this style in a race, be patient, keep the car smooth and controlled. Remember the story about the hare and the tortoise? Well, believe me, when you first start in RC, it works.

   To make this driving style work, the car needs to have the right tires, inserts and a low centre of gravity, low body-roll set-up. Grip is the keyword in this instance, without that, your car will slide out of control and you will loose the race.

   If the style you are looking for is to drift slide your car around the corners, I would recommend you perfect the rounding style first, then check out my other hints and tips to learn how.

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







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.










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