This is the Express Motorsports "Ripper" D3.5 17.5 Turn Brushless Motor, with a High Torque Rotor. This D3.5 based, Ripper series motor is 100% designed for spec racing! The Ripper motor is the same base as the Zapper motor with the change of the rotor. The rotor in the Ripper is a High Torque 12.5mm rotor for more low end RPM and power. This motor is great for indoor on road racing, oval racing and off road racing with tracks that feature tighter sections.
Express Motorsports motors are checked for any defects, proper bearing alignment and shimming. This provides you with a reliable blueprinted motor that has all the same tweaks as the motors driven by Express team drivers, ensuring the motor you receive makes optimum power. Sensor wire included.
- D3.5 Based
- 12.5mm High Torque rotor
- Improved air flow, cooler operating temperatures
- Timing gauge on end bell, easier to make timing adjustments motor to motor, run to run
- 100% designed for spec racing, No compromises
- Optimized for 1-2 cell operation, Touring, off-road, oval, etc.
- Sensor design, works with most high end racing speed controls
- Short stator, less wire, lower resistance, more power
- Lightweight endplate, less weight, lower center of gravity faster cornering
This product was added to our catalog on October 19, 2012.
Motor seems rather strong and the power is linear and smooth. Wish Express actually packaged their products properly! I received my motor with several dings in the end bell and can due to lack of protection during shipping and handling.
Doesn't seem to top my Schuur Speed though! Overall it is a good motor and runs fairly cool, temps around 130* in my 22 2.0 running in the 17.5 blinky class.
I have been running 4WD stock for a year and have tried SP 17.5 (1cell and V3), a Schuur Speed 17.5 and a Keyence Luxon KG from Japan with a variety of different outcomes after trying various gearing combinations.
I always seem to be lacking in low end torque when I get the gearing right for our high speed track.
This motor not only gave me the torque I was looking for, but it added a significant amount of top end to the power band with an FDR of 5.8. This thing is seriously an advantage in stock class. I will be getting one for my 2WD as soon as it gets back in stock.
If you have any issues with Express Motorsports they have no customer service at all. Also A Main will not help you with your problem stating that it has to go through Express which has no customer service and the phone number A main gives you is the wrong number. The issue I had is that the newer D3.5 sensor boards pulls more current than the old ones. The higher current draw would drain down the booster and the esc would lose its sensor signal. I had no issues with an older d3.5 17.5 I was running. The motor was installed in a 1/10 pan car running a 1s battery with a voltage booster. I was able to fix the problem by upgrading to a novak 6v 3amp booster. Minus all the problems the motor is average for 1/10 oval racing and not any better than the bone stock one I had. Also the motor is just shipped in a bag with no padding. Based on my experience I will never buy a Express motor again.