Slot Cars Rule !!!

The 2006 NSR Mosler MT900R

NSR came out with the Mosler “Xavex” #122 in July 2006; this car is more than a match for the Sauber, Nissan, Fly Ford Capri, and Fly EVO Porsche that had been dominating our no-magnet classes. NSR delivers, WOW !!!

• Here is a shot of the original car taken at Spa in 2003. The car actually won the GTO class there and was 6th overall, driven by Martin Short (GB), Joăo Barbosa (P), and Tom Herridge (GB)


• Ok, so the NSR car isn’t exactly cheap … but it is beautifully done, and is delivered completely race ready. For the scale and livery fanatics, I think NSR actually did a really good job. The paint is very nice although it could be argued that it is too metallic looking compared to the 1:1 car. Tampo printing and decals are beautifully made as can be seen in the following shots. Some of the decals could have been a bit bigger and better placed, but overall NSR gets a really high grade here.





However, what really matters is what is inside that car, and there, NSR delivers. NSR claimed when they announced the car that it would be equipped with just "the best parts on the market today"! Let’s review these claims first:
• Very low body weight (about 17grams)
• Very low height (less than 27mm)
• Very flexible chassis for better grip during exit of the corners
• 4 position magnet
• Shark motor
• Sidewinder motor 1° angled to allow very large wheels (14.5mm)
• Extralight & no-friction gears+pinion
• High strength axle
• Autolubricant & no-friction oilites
• Rear ultragrip tyres with air system wheels
• Front no-friction tyres with no air system wheels
• Low profile and adjustable sport pickup guide

• So, let’s take a look!!!
• The total car weighs at 70 g total, and the body is indeed at exactly 17 g
• The total height once the car is on the track with the guide firmly planted is indeed 27 mm
• 3 point mounting motor pod for great balance and rear axle – chassis/body decoupling
• 3 screws are used to mount the body onto the chassis, one right behind the guide and two in the rear, behind the wheels (The three visible screws on the picture below are actually the pod mounting screw)
• The chassis is indeed incredibly flexible, 45 degree torsion can be obtained lengthwise with very little force
• The magnet not only has 4 but 5 possible mounting positions. However, if you are anything like me, you will use that car no-magnet


• Let’s open up the car by removing the three body mounting screw (Do not remove the pod screws, more on this later)
• The car is as simple inside as can be.
• The interior tray is minimal, helping out with keeping the weight down. Some purists might regret the lack of details of the tray and driver.
• Plenty of room in there for lights, should you want or need to add any.



• I like the mounting fixtures of the pod, although one drawback is that not only can you drop and lose the screws, but with this car, you can drop and lose the black mounting plastic pieces for the pod as well. Be very careful if you loosen up your pod while the body still on the chassis, I almost lost one of them that way.
• Note that I am running the car no magnet with the body screw loosened up about ¾ turn and the pod screws ¼ to ½ turn



• Looking towards the rear of the car we find:
• Shark motor mounted in sidewinder configuration, it is indeed somewhat tilted to what feels like 1-2 degrees. This tiny angle enables larger diamater tires to be used as the motor shaft is somewhat out of the way of the rear wheels.
• The Shark motor is rated only at 22,400 rpms but it sure feels more like a 29K with even more torque to me.
• Gear and pinion are indeed very light, the gear is drilled and the pinion width is minimized. The gear mesh is just perfect on mine and there was absolutely no play/slop in the rear axle.
• The rear ultragrip tires with the air system wheels can indeed be found there. In my case, everything was perfectly in round although the tires really needed some sanding to eliminate all traces of the molding process.
• The wheels from NSR are incredibly light and well balanced, to the point where NSR has two symmetrical holes on the wheel stub for the set screws (evens out the weight around the axle).


• I went ahead and glued the motor in place (hot glue) and also glued the bushing in place (CA glue) as I thought there was just a tiny bit of play in them when the motor was at full throttle. I also lubed up the axle at the bushings with a drop of plastic friendly racing oil, and the gear/pinion with PTFE grease.



• Looking towards the front of the car, we find:
• Front axle with aluminum wheels and zero grip tires. Once again there is absolutely no play/slop in the front axle. I also lubed up the front axle with plastic friendly racing oil.
• The guide is as simple as it gets, no springs, no plates, just a simple quite deep guide. Some wood racers will probably consider upgrading the guide, as the blade could be longer and deeper for some wood tracks. It has just enough vertical play but not too much, perfect.
• One thing to note is that the guide wires although quite a small gauge are quite soft but at the same time do a perfect job at re-centering the guide after a de-slot.
• NSR claims an “adjustable” guide; I still have to figure out what is adjustable on it.


• Finally, we get to my only real beef with that car: the tires
• NSR tires are real good, and the grip you get is as good if not better than any other tires I have ever used (Indy Grips,, Ortmans, Super tires, etc). It does get even better when you use the NSR tire conditioning liquid that you can buy from your favorite retailer or hobby shop.
• However, NSR has to work on their mold and their mold release techniques as all their tires that I have ever seen (GT, Classic, F1, zero grip) suffer from excessive flashing. This is evident in the pictures below and specially for the front tires.
• I did try to sand down the front tires to get rid of these bumps but the tires lose (or so it feels) some of their “zero grip”. In my case, these tires will take a hike and have been replaced with low profile zero grip tires, much better.
• The rear tires, as shown on the picture can be sanded down but it takes some serious amount of work to do that, however it is well worth it ☺



I wanted a no-magnet rocket and I got it !!! According to Jim from Nomad, “this car is in contention with, if actually not better than our previous long track no magnet champion, a Sauber that had just incredible genes”. If you can afford one; get it, you will not regret it!!!