A Laser cut wood body for the highest speed possible.
Speed comes from finding the best trade off between:
1. Equal weight on the back wheels
2. keep weight on DFW low but not too low.
3. Keep thickness of body to 1/4″
4. Make body as light as possible while still being strong enough to resist any bending or vibration during a run, and super robust for Cubs where rough tracks and rough handling can occur.
Our engineering improvements to the typical laser cut body are as follows:
A. Offset the weight behind the back axle to be closer to the DFW.
B. the front axle position has been marked with both the BSA block distance (4 3/8″) and the most used Pro extended distance (4 3/4″).
C., We laser cut, but leave attached, a 1/16″ strip on the DFW side. This allows a solid fit in your drill fixture while drilling the front axle holes, and if desired can be removed to modify the DFW distance from the rail to get the back wheels centered on the rail.
D. We ship with most of the wood intact so you can drill without warping the body.
For best results, lightly sand the laser burned and hardened wood before drilling or gluing. DO NOT PURCHASE IF YOU DO NOT HAVE A WAY TO DRILL YOUR AXLE HOLES.
Typical jigs used for drilling
Our body as shipped
Leave the 1/16″ spar in place to make the body snug in the drill fixture. If too loose, put some tape over the car, if too tight, sand down. You do not want to force the wood into the jig.
Car is marked for both standard BSA and an extended width that has set world records.
Best speed is with 99.95% pure TxW Tungsten parts (the “Full Monty”).
1 pure 2×6 bar, 1 pure 1×6 bar, 3 pure 1×3 bars. Unless you are a Pro, this is more money than you need to spend.
Other options are to use the lower cost tungsten alloys in the “Poor MontyB”
Low cost parts in the Poor MontyB, two Alloy bars, and 18 tuning chips. Only the chips to bring the car to 5 oz. shown.
Fine tune weights give you 18 chips on double sided 3M tape that can be separated and placed to give the best accuracy possible.
What weight should I run on the DFW?
When the bar inside the weight cavity is set closest to the axle, we have a car that can be tuned to run with a 15 gram DFW or a 19 gram DFW.
This is a 0.5″ in front of the back axle all the way to 0.625″ in front. If this is too aggressive for your track, or you can not get the right drift to keep the car under control, you can easily slide the inside bar up a bit to get the DFW weight to just about anything you need.
Max speed with 15 grams DFW and tuning weighs all the way to the back and on the DFW side.
You can test by holding the tuning weights in place with scotch tape and when you find the best spot- peel off the 3M backing and stick it down.
Body can be sanded. Use one strip of metal tape on both sides and back of the weight pockets. Cut the tape to fit before you pull off the backing. (not included)
Be sure and cover top & bottom with packing tape or vinyl to cut air resistance. (not included)
More control with 19 grams DFW by sliding the tuning weights up to the nose.