I was working on some new cars last night and thought I would do a little easy step by step how to.
This is taking an already fast car, the Ferrari 458 Italia FTE and adding a little weight to make it a tad quicker!
You will need a drill (or dremel), some modeling clay and some 5 min. epoxy.
First, drill out the rivets and pop the body off the chassis.
Here you will see that there is a lot of space inside the car, between the interior and the chassis.
You can take some clay and squish (technical term) it into the little recesses and pockets under the interior.
Also place it into recesses in the chassis, put a little at a time and push the parts together to make sure they don't interfere with the wheels or axles or squish out everywhere.
When you're done, then simply put the car back together, use the epoxy to hold the chassis to the body studs.
Viola! A real downhill screamer!