With the geometry set right they wont understeer bad, but id much rather they did understeer, as soon as they oversteer you will be going round.

Short wheelbase, not much lock, weight in the back, and thats on a car thats factory made to be like that like a Clio V6, factor in the fact DIY ones are cobbled together from 2 sets of front ends etc, and your in a whole world of "not much fun".

From Clio V6s and MR2s to these various home brewed ones, they inspire no confidence at all on the cornering limit.

If you want to push a RWD car to the limit, get a front engine one.