Originally Posted by
av4625
Surely its what dino said, if you have it in rm3 for example and just spin the gearbox around and use mm3, you are putting the motor on the other side, mm4 and rm3 have more weight transfer, and mm3 and rm4 are more neutral with less weight transfer (according to the original 210 page on the TD site).
http://www.team-durango.com/in-the-p...rticle_id=4472
You should look at the differences between mm3 and rm 3. The motor is physically on the same side of the vehicle. Because the motor is on the same side the motor IS NOT on the same side of the gear box when comparing mm3 to rm3. In 3 gear the endbell will be facing the drivers side of the car with the pinion on the passenger side. In 4 gear the endbell will be on the passenger side with the pinion on the drivers side. It DOES NOT MATTER if it is built mm or rm. When looking at 3 gear the rotation of the motor is in the same direction, toward the rear of the car, same direction the wheels would turn if they are turning in reverse.
Someone smart once said that every action has an opposite and equal reaction. So what does that mean? If the motor is spinning in the same direction as the wheels in reverse, something that is holding it (the motor mount) has a force on it that is opposite and equal to the torque that the motor has. This force is applied to the front of the motor, no matter if its mm or rm.
In rm3 the force is applied to the rear axles because the rear axles are in front of the motor. In mm3 the force is applied to the area in front of the motor. The rear of the car will still squat, but not as much as rm3 will make it squat. This is because rm3 has more leverage than mm3 because of the placement of the force on the chassis. The force is applied to a point that is further towards the rear of the chassis.
Picture this, put you finger on the rear axle and push down, now push with the same force two inches in front of the rear axle. In which spot did the rear suspension compress more? Obviously it did when you pushed on the rear axle, because of the leverage that you had on the chassis.
Now the same is true with 4 gear. In 4 gear the rotation of the motor is in the same direction as the wheels going forward no matter if it is mm4 or rm4. Now because the motor is rotating forward the force is to the rear of the motor. So in rm 4 the force will be at the rear of the car. This will have more leverage on the car than any other configuration simply because of the location of the motor. In mm4 the force will be applied to almost the same spot that rm3 applies it but because of the direction of the rotation of the motor the force will be greater than the force made by rm3.
It has taken me a while to figure this all out and sometimes it is hard because of all the hearsay on the subject and also because of racers having to be pc for the companies they collect money from.
Hope this helps
Tim