rear motor support

[RC-Monster Mike]

The rear support may do more harm than good on a truggy or buggy conversion - especially with my motor mount. My motor mounts are pretty thick at the motor area and provide lots of strength to prevent misalignment to start with, but they are also attached to the entire center diff mount (top and front are tied into the rear mount though each other and the lower chassis plate). This is effectively a square, which is quite strong, and any flex within it will be as a unit(diff will move with the motor if movement occurs, which will largely maintain gear mesh).
This in and of itself eliminates the need for a rear support. Furthermore, on nearly every 1/8 buggy and truggy I have seen, the rear chassis brace stops short of the center diff. This means that the chassis flex that is present will happen in this area(rear of the motor is in the "flexible area"). If the rear of the motor is supported ontop of this rearward chassis area, the chassis flex will move independant of the center diff/motor mount setup - effectively CAUSING the very problem you are trying to eliminate. Leave well enough alone - I think trying to support the rear of the motor in this particualar application will do more harm than good.

The Revo mount is different - there is not "square", so the rear support adds to the overall rigidity. Adding a rear suppport that is independant of the mount itself will cause trouble instead of alleviating it. :)

[GriffinRU]

Originally Posted by RC-Monster Mike

The rear support may do more harm than good on a truggy or buggy conversion - especially with my motor mount. My motor mounts are pretty thick at the motor area and provide lots of strength to prevent misalignment to start with, but they are also attached to the entire center diff mount (top and front are tied into the rear mount though each other and the lower chassis plate). This is effectively a square, which is quite strong, and any flex within it will be as a unit(diff will move with the motor if movement occurs, which will largely maintain gear mesh).
This in and of itself eliminates the need for a rear support. Furthermore, on nearly every 1/8 buggy and truggy I have seen, the rear chassis brace stops short of the center diff. This means that the chassis flex that is present will happen in this area(rear of the motor is in the "flexible area"). If the rear of the motor is supported ontop of this rearward chassis area, the chassis flex will move independant of the center diff/motor mount setup - effectively CAUSING the very problem you are trying to eliminate. Leave well enough alone - I think trying to support the rear of the motor in this particualar application will do more harm than good.

The Revo mount is different - there is not "square", so the rear support adds to the overall rigidity. Adding a rear suppport that is independant of the mount itself will cause trouble instead of alleviating it. :)

You brought a very good point of view!
But I haven't seen yet any conversion bracket which will work as you describe, which will make it ultimate solution ( still need support for rear, you need to fix motor in XYZ).
Do not forget that we try to eliminate flex created by motors torque as well, which has nothing to do with chassis flex.

Good, so on my revo i'll put the rear support and on my mugen, i'll not