What you get:
A TxW modified Funnycar body, with a notch and a surface for two small plates on the back all done for you.
The tungsten alloy weights: 2 oz tungsten bar, and two 0.25 oz small plates for 2.5 oz of weight behind the back axle, just enough weight to bring the car up to 5 oz.
The Funnycar from PineCar is one of the most aerodynamic designs available.
Moving the COG even 1/8″ closer to the back of the car will show up as a speed increase when racing. A common solution is to drill holes in the body and insert tungsten cylinders to add weight and attempt to move the COG to the back of the car. ( no Pro racer would ever use zinc, steel, or even tungsten cylinders because they are not as efficient as bars, cubes and plates of tungsten)
PineCar even has their own design using threaded tungsten cylinders that can be placed in holes drilled into the car.
If you do not have the tools and experience of making many cars, you do not know that even with tungsten used in this way, the COG is not moved as much as if you were to use bars and plates of tungsten in a better design created by TxW Txchemist. Created for the Pro racers ( who continue to set world records each month with TxW tungsten and car body designs) it can now be incorporated in the Funnycar block for you.
The photos below show the weights held with clear packing tape so you can see where they go. The weights are moved to the right side of the body where the DFW is. This leaves a little gap on the other side that you can put a small wood plug in if you want to have the back look solid all the way across. The actual finished car would use aluminum tape to cover and hold the weights.
The back of the car has been cut so that after the small plates are on the back, the distance to the end of the nose of the car is exactly 7 inches.
The best speed/cost design is the TxW Modified that comes with the weights and tape to put them in place after you attach the axles, wheels and paint it.
A few finished car concepts.