don't take this the wrong way, but...
learning to drive it properly will make the car much faster a to b.
just to quanitify,
I did a trackday at snett (300) in a totally standard road car and was consistent with 2.27-2.28's. A chap who I know who has done loads of trackdays etc and has moved into racing - he was driving a race spec clio 182 (1000kg and a very accomplished car on the track, always much quicker in the right hands than my car) and his best time was 2.31 but consistent with 2.33's
I looked over his footage and the first thing I noticed was his lack of high speed corner speed - boy the car could accelerate, but it was as though he had no bottle to keep it nailed.
I have seen other big mouths with supercharged cars running 50bhp than mine (same type of car) and be 7 seconds per lap consistently slower.
the difference is not turbo's, remaps or big brakes.
The difference was down to 2 things, although the main difference was 'driving', the other was grip which contributes to carrying corner speed.
A slow car well driven can be quicker than a fast car driven averagely.
So my advice if anyone wants to go quick, is spend the money learning to drive properly in the first place, it will work out much cheaper and be much more fun, there are loads of decent instructors from Mark Hales to, and even Jack Goff who has set up recently. (for those who don't know Jack, ex clio cup championship and now btcc)