Brushless Hot Bodies GTX2
First off I am a we bit nuts, second the brushless power of this thing actually scared me, yes even me. A 15lb+ RC with the ability to not only wheelie on command, but have enough torque to completely flip at any speed just isn't right.
Hot Bodies GTX2 Twin Force – GTX2 to “The Sod Ripper”
Although the final result may look simple, the GTX2 was one of the toughest NTB conversions I have done. According to the previous owner, “dual engines were in reality twice the fun but also twice the headache”. He was right, because I seemed to only keep one engine running at a time and when both motors were running it was far too loud for me. All I really wanted was to see this 1/7th scale beast wheelie’ing down the street with unnatural power, but I was short on engines for power. After attempting and failing to make my 31cc weed whacker motor fit and a few “what’ca doing?” questions from my wife, I decided it was time to again go brushless. But what? A RC this size and weight is a stretch for even the large Savage class 10th scale systems like the Tekin, Castle, and Novak units. The only thing that could handle something this size was a 6S + rated ESC with a freaky big motor. Hmm…three phone calls later and there was no question, this huge 15+lb 1/7 scale beast was going brushless with some RC firsts.
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GTX2
Neumotor 1527/1D - 2160Kv Motor
MaxAmps 22.2V 10,000Mh LiPo Pack
Castle BEC
Pistic stick to pistol TX convertor
NTB Conversion Custom parts
Pro-Line Ford F-650 Body
Pro-Line XL
Pro-Line 23MM Wheel Adapters
RC-Monster.com Mod1 Pinion
NTB Conversion Custom parts
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After spilling the car’s specs to Steve at Neumotor he simply said “I will surprise you” and then did with the infamous 1527/1D - 2160Kv motor. What’s the big deal you ask? The 1527 is rated at over 4000Watts, will handle 8S with ease, has the equivalent of about 6-7HP on 6S, has the same internal resistance as a Dean’s plug, and is the world record speed motor of choice for boat and cars – Yeah, that should do it. To round out this industry first NTB conversion, Castle suggested a Pheonix 110 - 50V rated ESC, and MaxAmps suggested dual 11.1V 3S 10,000Mh LiPo packs. The Pheonix ESC is designed for aircraft stick transmitters, but never fear, Offshore Racing has a Pist’ic gadget that allows you to use pistol transmitters with any aircraft ESC, so the stock transmitter could still be used.
This conversion was similar to the Savage with brakes and braking servo retained and a signal splitter assuring the brake servo and ESC get the proper signals. I fabricated a braced ¼” thick T-6 aluminum plate with my Proxxon mini-mill that secured the motor in place with four massive 4mm screws. The motor and ESC leads were even tipped with huge 5mm connectors.
With easily twice the power on board as stock, the GTX2 not only wheelied on command you can flip this 14Lb RC with glove up put on safety goggles, hide pets and small children levels of power that torqued the 1/7th scale monster to over 50MPH. This brushless beast removed and tossed stripes of sod from my lawn with every throttle pull. Throw this thing on the track on even 1/8th scale days and you will have people clutching their buggies in fear like miniature poodle owners at a Rottweiler convention. Ultimate brushless power like this should be require a special permit (insert evil laugh) – it actually scared me.
Hot Bodies GTX2
Neumotor 1527/1D
MaxAmps 6S Powered
Castle BEC
Customer Motor Mount
Castle Phoenix 110 Aircraft ESC
Pistic Aircraft ESC Pistol Grip Converter
UPDATE - Search for RWDP in the blog search tool to the left. I made a number of upgrade this this chassis since developing this build.
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