Quote:
Originally Posted by V-Rossi
2) Front wheelbase mod:
This is a very simple one. The idea is to extend the wheelbase of the car on its front end. So dremel about 1,5mm off the front side of the hub (1,5mm is about the thickness of a wheelbase spacer at the back) and move the hubs forward. This will increase the total wheelbase, but that isn't the only goal.
When placing your front and rear hubs forward (so front long and rear medium wheelbase) you don't make the car any longer, but maintain the wheelbase. The only difference is that more weight is shifted to the rear end of the car. Simply moving the rear hub forward does the same thing, but the CR2 is already a short car, so with this mod you don't make it any shorter and you'll still be able to get more weight to the back. Here is an example:
 
The effect? I used both front and rear long wheelbase, this made the car a lot more stable. It gives you a little less steering, but most people will hardly notice it. And while not being really faster over a single lap, it does make it a lot easier to be fast on a consistent base. Again we are all using it (with great effect, the CR2s had 1st, 5th and 7th place at the National) as it makes the car a lot easier and more fun to drive. |
I did this mod and ran it for a few months and it was an improvement. But found a much better method of extending the wheelbase, without upsetting the weight balance at the rear, and without offsetting the steering.
This is a XX4 wishbone flipped with XX4 upright and hub. You gain about 8mm in wheelbase. You have to ad a shock spacer and small shim to fit the wishbone to the XXX pivot - as below. I used a cut down rear hinge pin, but you could use a shock shaft or suitable hinge pin from another car.
I've been using this setup on a tight high grip carpet track with the uprights reversed - giving 10 degrees of castor. You can drive it like a 4wd!
All of the pics of the car and more of the mod are here:
http://picasaweb.google.com/irishwil...hiteWinter2010#
Can anyone who tries it let us all know what you think?