actually, the revo is nose diving happy. stiffening it up a bit in the rear only makes the front dive even more.
Having said what i did in the above quoted message, i have since tested a couple of theories using my revo, so here goes.
Placing the rear upper suspension pins in the lower of the two possible positions does indeed raise the rear end up. The counter effect, is that under braking the nose will dive harder. If braking in a corner, it will dive and want to roll over towards the outside of the corner under the "off balance" push.
Adding some negative camber to the steering block is a possible solution as it will allow the tyre to bite more under "push" conditions and lessen it a little bit. This is due to more of the tyre being in contact with the surface due to the pre set negative camber. Caster is also another option to consider. more caster gives a sharper lean to the tyre under cornering, effectively giving slightly more steering capability.
Another possible aid, would be the fitting of ARB's (Anti roll Bars) most conmmonly known as "sway Bars". These act to level the suspension out in cornering effectively lowering the C.O.G a little and allowing a little more tyre bite.
Stiffening the front end suspension will also help a little as, under cornering, wioth a soft setup, the suspension will allow chassis roll, which in-turn, lessens the wheels biting capability. With a stiffer suspension, less chassis roll is caused and the tyres will bite and grip in better manner.
Adding weights to the chassis, especially at the front end, will cause the front to dive even more so than normal, especially if the rear end is set high and is using 120 rockers. A way to restrict rear end lift, is to use a "Limiter" to allow the rear end to Lift only to a certain point, which in turn will help to stop front end dive.
Fitting weights to the front wheels only serves to increase rotating mass and makes it harder for the servos to turn them, especially at speed due to the gravitational forces involved. It may also cause early hub bearing failure and undue stresses on such parts as the steering hubs themselves at the pivot ball cups and adding stress to the suspension arms. Jumping a vehicle with weight at the front end, may also make it not only harder to control but also, it may make it more "nose heavy" in flight after a jump.
also, a revo will "Squat under accelleration if the suspension at the rear end is set high and the shocks are set with too soft springs and oil. Even with full preload some springs, especially the stock "blue" band ones, are way too soft and allow to much squat. Squat as has been pointed out, is counter productive to steering. Therefore, setting the rear end for adequit "rigidity" shall we say, under acceleration and by the act of "Limiting the travel in combination with stiffening the front end suspension up, fitting front sway bars and adding camber and caster up front will all help towards working for more steering and help in limiting on power push under cornering.
Hopefully, i have not mistyped any of that !!
If anyone cares to do so, please correct me if i am wrong in anything that i have said.
