Definately change the engine. If a GTT is over your budget, then try to find a C2J engine from a R5 GTS or a R9/11. With allmost 70 hp, that should sort you out. You should be able to get a good one for about 100 max. Or better still, sell the 1.1 and buy a GTS, it's a much more sporty car (160+ km/h, good seats, front bumper with foglights, revcounter, etc.).