Performance Velocity Stacks
This set of intake velocity stacks are designed to replace the factory VTR 1000 Firestorm/Superhawk intake stacks. I too ride a VTR 1000 and have had the chance to develop these stacks over the past year. Through many iterations, this design has been found to be the most successful in increasing airflow through the mid to high RPM range.
The stacks are 3D printed in nylon with 20% carbon fiber, this results in a very strong part that has excellent fuel, oil, heat and flame resistance. They are printed in-house to order. Both stacks are of equal length, standing at 72mm tall which is 5mm shorter than the tallest stock inlet stack. The finish texture is slightly rough much like the texture of the intake ports in the head. As picture the stacks have detachable retaining rings, these are designed to hold lateral force on the mounting bolts to stop them coming free. The lobes from the star shape of the rings sits above the other retaining screws and mitigates any loose screws from becoming free and being sucked into the intake. Unifilter foam squares are supplied to cover the catch can inlets if one wishes to delete the catch can from the airbox.
A direct comparison of stock intake stacks to these velocity stacks was undertaken. Modifications to the VTR 1000 used include; Leo Vince cans, Unifilter airfilter and manual cam chain tensioners. There are no modifications to the carburettors, but as you can see the bike was running rich.
At the maximum difference there is over a 6 horsepower increase, over 4 foot-pounds of torque increase and a far better fuel to air ratio. The power increases are substantial from 6000 RPM onwards. Of course, results may vary with each individual setup but feedback from customers has been nothing but positive.
Adjustable Performance Air Filter
This reusable adjustable performance air filter is a direct replacement for both the stock air filter as well as any high flow performance air filters. The air filter features two grades of high flowing air filter foam, a coarse pre-filter to catch large particles and a fine main filter to thoroughly clean the air. These high flow air filter elements are removable for easy cleaning, re-oiling and replacement when necessary. More air filter elements can be added or removed to adjust and fine tune (if needed) the air flow characteristics of the air filter. The high quality sturdy aluminium and stainless steel construction means the air filter will not need to be replaced and is by far the most serviceable aftermarket air filter available.
Also included in the kit are top and bottom air box sealing gaskets, new crankcase vent filter retaining blocks and the vent filter foam elements to suit.
Three runs on the dyno were performed; 1. Both the fine (GREEN) and coarse (RED) air filter elements. 2. Just the fine (GREEN) air filter element. 3. Just the coarse (RED) air filter element.
Each change in the air filter elements resulted in different air/fuel ratios. The coarse offered the highest air flow and as predicted the fine and coarse together gave the most restricted flow.
This gives the ability to use the same air filter even after re-jetting for higher performance.