Gear Ratio 101: Learn the basics of gear ratio
Definition: gear ratio n.
The ratio of the speed of rotation of the powered gear of a gear train to that of the final or driven gear.
Gear Ratio’s can be difficult to understand, but with a fairly brief explanation I will attempt to make this often misunderstood equation VERY easy to grasp. Simply stated, a gear ratio is a numerical value that describes the relationship between two gears (a spur and pinion gear for our discussion). A gear ratio can also describe the relationship between the FIRST gear and the LAST gear in a gear train (or a transmission). You take the number of teeth on the DRIVEN (Spur) gear and divide it by the number of teeth on the DRIVE (Pinion) gear………the numbers are expressed as such: A 72 Tooth Spur divided by a 20 Tooth Pinion = 3.60 to 1 or 3.60:1
Cold Air Intake for .21’s
Introduction:
This modification is probably the easiest modification I have seen yet. It requires 3 things. By using the three things together you can pretty much rest assure that your air filter won’t becoming off anytime in the near future.
Please note this project was done with the Hyper .21 8 port engine installed on the HPI Savage.
Parts and Tools Needed:
(1) HPI High Performance Air Filter (part no. 72438)
(1) Traxxas Rubber Pipe Exhaust (part no. 4451)
(2) Small pipe clamps
(1) Flathead screw driver
THAT’S IT!
The Project:
Click to continue…
Hop-Ups that every Nitro machine should have done before it’s first run
Key Benefits:
- Safety
- Reliability
- Longevity
In-Line Fuel Filter – For whatever reason, most manufactures do NOT include a fuel filter. Though this is one of if not the easiest way for dirt to enter your engine. How many people refill their tanks in a perfectly clean environment? I know I dont…usually its somewhere where the dirt is already flying in the air from bashing, the truck is already covered in dust, dirt, mud or whatever. So when dirt gets in the tank it goes straight to the heart of your R/C…the engine.
WoodiE’s Top T-Maxx Hop-Ups!
Seems lately that a lot of people want to know what people recommend as some hop-ups for a stock T-Maxx. Here is a list of hop-ups I recommend for any T-Maxx.
- Fuel Filter – Take no chances of any dirt or forgien object getting into the gas and into the engine. I recommend the Racers Edge fuel filter.
- Air Filter – This is a must. I wouldn’t trust the air filter the maxx comes with just to run it up and down the street. The smallest peice of dirt can cause havok on a small engine and send you shopping for a new one. I highly recommend the Motor Saver Air Filter. With the increase of air from the motor saver air filter there will also be a slight increase of power. I also believe the air and fuel filter should be installed before even starting your t-maxx for the first time. The last thing you want is dirt in an engine.
- Titanium Front and Rear Skid Plates – Face it, we bash the heck outta our T-Maxx’s. These are to two parts that more times then not take the most beating. Titanium does cost a little bit more, but the strength you pick up from it is worth it and more. aluminum on the other hand bends, and once bent cant be bent back. Bending alum. back only weakens it more. The only advantage I see aluminum having over titanium is all the colors avaible for aluminum.
- Tuned Pipe – Before going out and spending that $100-$200 for a new engine, install a tuned pipe. The stock engine is pretty powerful if tuned correctly. With a tuned pipe you can bet you will see an increase in power. As an added bonus it will even make your Maxx sound cooler! I would recommend three tuned pipes. 1) AE Pipe 2) MIP Stinger 3) CVEC Pipe – though the CVEC pipe is not legal to race with. I personally run the AE Tuned pipe and love it. The sound of my maxx now is awesome and the increase of speed is noticable.
