ACCELERATION OF A RWD (RR LAYOUT) :

RWD is a class of vehicle where the maximum body weight i.e. the engine and transmission unit is situated at the rear portion of the vehicle.
 The Process, Physics & Mathematics and the Improvement Factors are discussed here.
In order to throttle a RWD, one must peddle the ACCELERATOR/BRAKE along with the full peddle on the CLUTCH.
This means that the engine provides enough drive to the wheels making it to travel at an instantaneous velocity from its static condition. As the throttle is increased there is “load transfer” to the rear wheel of the vehicle. Initially the acceleration is at one rate, due to the load transfer there are reaction forces from the rear end of the vehicle which increases the acceleration of the vehicle . Likewise the inertial force of the vehicle provides load transfer to the rear end and the process continues till it reaches a balance.
NOTE: Still more acceleration doesn’t account for the rise of the front wheels since the whole load is at the rear end. Just like in case of the FWD during braking the rear wheel doesn’t lift off.
The balance is reached when the maximum acceleration is achieved. Now, that is a mere value which depends of various factors one of the most being the “Weight Distribution” of the vehicle. 

Let us consider, a vehicle of 1000 kg, having a 50/50 weight distribution i.e. 500kg on either side from the centroid. Consider the wheelbase to be 2.5 metres apart and the Coefficient of Friction to be 1.0 and the distance from base to the COG is 0.5 metre.
Thus, calculating we get the acceleration using Newton’s Second Law of motion to be:
 a= 0.5g (acting at the GC of the vehicle)
Now we consider forces X and Y reactive on the wheels of the vehicle. Thus equating the moments and the reactive forces we get,
X= 60% and Y = 40% of the “kgwt” of the vehicle.
So Deriving the equation in terms of “g” :
X = 0.5 + 0.2g
After 3 Iterations, we get,
a(max) = 0.625g
Thus, for 50% load distribution, a = 0.5g
And for 60% load distribution, a = 0.625g
Generalising, from the main image,
Acceleration = u [b/(a+b)]/1-u[c/(a+b)]
IMPROVEMENTS:
 THE CG can be increased from 0.5m to 1m, but will decrease the stability of the vehicle.
 The Wheelbase can be decreased which will again decrease the Stability of the vehicle.
 The Coefficient of Friction can be increased to 1.1 i.e. stickier tyres.
 The Weight Distribution can be split 60/4 or 70/30.
 Increase the Downforce .