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Tamiya Lowride Pumpkin - #58594 (Radio Controlled Model Review)

1/12 Scale Electric M-Chassis Model Truck - M-06 Chassis:

  Released by Tamiya on July 1, 2014, this self assembly kit is basically a Midnight Pumpkin bodyshell mounted on an M-06 Chassis. Although the M-06 is generally seen as a 1:10 Scale Chassis, for the Lowride Pumpkin, Tamiya have rated it as 1:12.

Tamiya Lowride Pumpkin - 58594 - 1:12 On Road
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  In comparison, the Tamiya M-06 Chassis is a complete re-design. The previous short wheelbase RWD (Rear Wheel Drive) Chassis designs, the M-02 and M-04, were high centre of gravity, inboard motor configurations that made them difficult to handle without rolling off the track on tight corners lots of fun though.

  The M-06 employs a braced plastic tub chassis design with an overhanging rear mounted motor, orbital gear differential, shotgun style stick battery positioned longitudinally along the centre line of the chassis and four coil spring over friction shock absorbers. Three wheelbase settings for this chassis are possible: standard 210mm, medium 225mm and long 239mm.

  I have two upgrades I recommend for this model. The kit comes with plastic and sintered brass bush type bearings, that if installed, when dust and grit get into them, will abrade the drive shafts that spin in them - These should be replaced by steel shielded ball bearings before initial assembly. The second upgrade is a set of oil filled dampers in place of the friction ones.

  With these hop-ups, the chassis performed well, although it did show a certain amount of under-steer that was soon resolved with a change of springs and oil weight.

  To get the best from the Tamiya M-06 Chassis, it needs to be fine tuned to hug the corners at high speed, without slipping off the track. Small adjustments can make a Big difference and our simple to understand, step by step procedure, will guide you to the best Set-up for your driving style.


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

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Tamiya Lowride Pumpkin - #58594 M06 - Chassis
Tamiya Lowride Pumpkin - #58594 M06 Chassis
Tamiya M06 Chassis
Tamiya M06 Chassis

Buying a Used Tamiya Lowride Pumpkin
Truck (and What to look for)


   Buying a used Tamiya Lowride Pumpkin Electric 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 Tamiya 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 Tamiya 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 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 Lowride Pumpkin 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 Lowride Pumpkin 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 Lowride Pumpkin Truck 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 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 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 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 Lowride Pumpkin 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 Lowride Pumpkin 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 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 Lowride Pumpkin model and good racing.


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Information and Advice

Electronic Speed Controllers

History:

   ESC were originally developed to be used in conjunction with brushed 27T stock and modified motors in the late 1970s, early 1980s. Compared to modern day Controllers, they were Bulky and heavy, constructed using basic resistors, rheostats, capacitors and transistors, crammed together on a simple circuit board, to provide stepped but smooth acceleration when compared to the old mechanical, servo operated sweeper Speed Controllers. An Electronic Switch to change the direction of current flow was used on some of these early ESC to give reverse operation. Although they were a vast improvement on the old mechanical speedos of the time, they were expensive, jerky to control and prone to burn out if not carefully looked after.

   As new technology became available, improvements were slowly made and with the introduction of the new FET (Field Effect Transistors) and some basic mass produced silicon chips, ESC were made smaller and their reliability gradually improved.

   By the mid 1990s, "regenerative breaking" was developed. This meant that energy that would have been lost slowing down the car by effectively turning the motor into a generator, was harvested and put back into the battery. This of course was long before F1 had KERS (Kinetic Energy Recovery System) and adjustable anti lock breaking was introduced.

   Brushless Motors came to RC in the late 1990s early 2000s, which required a new breed of ESC to be developed to fully utilise the new technology. Ni-Cad Rechargeable Batteries were superseded by Ni-Mh and more recently Li-Po Batteries which provided higher Current output for the ESC to regulate. The latest ESC now use sensors to manage the motor and can be adjusted remotely to suit varying conditions.


Brushed Motor ESC.

   The "Silver Can" Stock Motors that come in a wide number of RC model kits are often accompanied by a 5 Amps to 20 Amps ESC. However, if you want to upgrade to a more powerful Modified Brushed Motor, 20 Amps may not be enough, so you will have to buy a something well over 20 Amps depending on the number of turns of your motor. As a rough guide, a 9 Single has a much higher current requirement than 20 Single.

Brushless Motor ESC.

   ESC for Brushless Motors are in no way compatible with brushed motors. The DC (Direct Current) input from the battery, on brushless ESC is transformed into three phase AC (Alternating Current). Each "phase" connecting three wires on the Brushless motor. By changing the frequency of the output wave the motor will spin faster for acceleration or slower for breaking. Reverse is simply achieved by changing over any two of the three "phases".
   At the time this article was written, Brushless ESC range from 3 Amps to around 300 Amps.
   For beginners I recommended you buy an ESC and Motor Combo, that way you can be sure the ESC Current rating is correct for the Motor.


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



My First National

   When I first started in RC, way back in the late 1980s, I would turn up to the weekly club meeting, with my Tamiya Boomerang, transmitter, two sets of crystals, a couple of batteries, a charger and a tool box with a wheel spanner and a few spares.
   It was three five minute qualifying rounds and a final and every month we would have a trophy meeting. The trophies were donated by a two of the older semi professional guys who basically ran the club and over the years had collected what must have been hundreds of trophies and had no space for them anymore. The lure of a trophy always brought out the "not as enthusiastic types" and the small church function room was always packed on those nights.
   About a year in, my collection of B final trophies was beginning to clutter my room and my dad bought me the new Tamiya Manta Ray. That was the big turning point in my RC career.
   From then on it was A finals all the way. Then one day in the summer of 1992 the club organisers (the semi pro guys) asked me if I would like to go to a BIG national meeting way down south in Malvern. I asked my dad and with a bit of prompting he said "why not".
   When we got to that meeting we found there were around a hundred competitors, with ten groups of ten. I was in group "H". and two of my friends who came down with us were in group "I" so were on just before me.
   I remember that first race like it was yesterday. It was a staggered start and I set off next to last. I had never raced on a proper outdoor dirt track before. My only experience was on indoor carpet, but my old Manta Ray took off like a bullet. Most of the others in my heat were rookies and by the end of the third lap I was up with the leader. He was good very good but I stuck to him like glue. Each twist, turn and jump brought me closer and closer, this guy was fast, but I was faster for a while anyway. A lap before the end my old over worked 1400mah battery, was struggling to give me what I needed to keep up with him and my buggy got slower and slower. I ended up third in that first race, but wasn't about to give up that easy.
   There was a shop at the meeting and straight after the race I nagged my dad to get me a new battery. In those days money was tight and normally before dad would spend anything he would consult my mum, but this time she wasn't there and after watching my performance in that race he didn't need much pushing to get me that badly needed new battery.
   Waiting for the second round seemed to take an age, but when it arrived I was pumped up and ready with steely determination. I was away third after finishing third in the first round, so my duel with the guy who beat me before carried on where it had left off. Two laps in and I was on his tail. He wasn't going to beat me this time. We lapped a couple of back markers and were quickly catching up to a third. He slipped past him in a flash, but when I moved in, the idiot drove straight into me, knocking my Manta Ray on its back. The marshal was oblivious to my plight. I shouted my head of but the marshals eyes were fixed on what I guess was the car of one of his friends in my race. The next thing I saw was my dad, bounding across the track like a gazelle, picking up my car, putting it on the track and giving me the thumbs up. I drove like the wind, passing car after car, slowly working back up to third, where I eventually finished.
   But it didn't end there. Because my dad had ran out onto the track, I was disqualified we pleaded our case and eventually were allowed to continue.
   The third round heat arrived. This time I wasn't going to let anything stop me. My focus was to win that race and beat that guy who had all the luck so far. Because of the previous race I set off last. Car after car was left in my wake, until once more it was me against him. Mano a mano, he saw it was me and he upped his game. Lap after lap we duelled for the lead. Coming into the very last lap I was a nose in front and pulling away. With each corner I could sense the battery was once again giving up and my car started to slow down. Corner after corner I could see him getting closer and closer. we got to the final straight and he was right on top of me breathing down my neck. I held my breath and jammed over the throttle leaver and just crossed the line before him I had won my first national heat race. and it wasn't to be the last.

For Car Setup Information check out our Hints and Tips page.







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