Using the new Traxxas Revo 2.5R/3.3
By now, you’ve probably noticed a few changes to the Revo set-up sheet. The new set-up sheet is updated with changes that cover the new features and performance accessories that are available for Revo models. Along with additional djustment fields, some areas of the set-up sheet are expanded to accept more information, while others are updated for better adjustment clarification. The new sheet is used in the same way as the old one. Each area is clearly labeled, and easy to use. Simply fill in the appropriate fields and print. You can keep track of your race set-ups from track to track and share them with your racing buddies. Let’s go over the changes.
Center Differential Kit
The center differential has been added to the “Transmission/Clutch” field (figure A). Just mark the appropriate box, yes or no, for whether or not you are using the center differential kit.
A line has also been added to the “Differential Oil” field (figure B) for the center differential fluid setting. When using the center differential, mark the “Diff” box with an “X”, and then note the fluid viscosity in the blank. The front and rear differential blanks have not been changed.
Dimensions / Balance
This is a new field (figure C) that has been added above the “Engine/Exhaust” field to record chassis size and weight specifications such as wheelbase, track width, vehicle weight, and weight bias. The wheelbase is noted in inches and is measured from the front axle to the rear axle. Make sure the front wheels are pointing straight forward when measuring wheelbase. Keep in mind that front and rear toe settings will alter the wheelbase readings when changed. It is best to set all toe angles at zero to get an accurate measurement. Caster settings can also affect wheelbase as the upper arms are moved back and forth, and should be measured with the caster in the same position as noted in the “Front Suspension” field.
There’s also a new area for indicating chassis length. Mark the appropriate box for stock or extended chassis. The standard Revo 2.5R chassis is indicated as “Stock”, and for any chassis that is longer than the stock 2.5R chassis, then mark the “Extended” box and note the length of extension. The Traxxas 3.3 chassis is 30mm longer than the 2.5R chassis. If your chassis is extended to a different length, then fill in the extended amount in the blank. The amount of extension is measured in millimeters.
The Traxxas extended wheelbase suspension arms offer two optional settings, 10mm and 19mm of extension. Mark the appropriate box for which arms are being used, stock or extended. When using the extended wheelbase suspension arms, note the length of extension that is being used in the blank. The extension is measured in millimeters.
Track width is measured from the outside edge of the left tire to the outside edge of the right tire of the front and rear ends respectively, and is measured with the wheels pointing straight forward. Note that changes to toe angles and camber settings will affect the track width measurement, so it’s best to measure with 0-degree camber and toe angles. In the event that you are unable to measure the track width, then note the offset of the wheels used. Wheels designed with wider offset measurements will increase the track width and should be noted if the track width cannot be measured.
Weight bias is the balance of the truck front to rear. Different bias settings will alter how your truck handles and responds to input. More bias toward the front will increase steering and response, while more rear weight bias will offer more rear traction and decreased steering response. The front and rear weight bias settings are found by weighing the front and rear end of the truck independently, and then calculating the percentage of each end from the total vehicle weight.
There is a new field for the Revo’s brake system titled “Brakes” (figure D) located just below the “Engine/Exhaust” field. Mark the appropriate box for which brake disc is being used in the front, stock or vented.
There are yes/no boxes for the use of the rear brake kit (used only with the center differential kit). If the rear brake kit is used, then fill in the appropriate blanks for the front and rear brake settings. Turn the radio system on and roll the truck forward while slowly pressing on the brakes. If the front and rear wheels lock up at the same time when the brakes are engaged, then this is noted as a 50% -front / 50% -rear brake bias setting. If the wheels lock up on one end before the other, then that end will have the greater number. A “0” setting will not engage the brakes at all; therefore the other end will be noted as having 100% of the brake bias.