Heh..... at my first AX after I removed the 2.4 & put in the 2.7, I got maybe 200 yards before I was going backwards
I never AX my car when it had a t-4, but I AXed JimC's car last summer and was amazed by how easy it was to drive....foot to the floor & steer.
With even minor changes comes a learning curve & spins/daid cones are part of that.....I do this every season
In my experience, 914s give little or no warning rear end of break away.
To have to learn to anticipate that.....you kinda get a feel for it thru G loads.
They definitely will spin while trail braking....that can be used to an advantage, but if your going too fast, nothing will save you
.....butt time is the key. Straight line braking is good till you learn to anticipate.
If it's pushing, a *big* lift on the go pedal will bring the back end around......but be ready to counter steer
and jump back on the go pedal. I got to practice that on a skid pad last year. A little lift won't do it, but get it right and I could dirt track around half of the circle...not the quick way around, but it will save a run.
If you're not looping the thing occasionaly, your not trying hard enuff.....to often and you're pushing too hard. .....the red mist. You can't learn under the influence of the mist.