How to make your turbo SPOOL FASTER the simple tips you need to knowT25 GT25 GT28 GTX28 TD04HL TD04. T25 GT25 GT28 GTX28 TD04HL TD04. These turbos, not only are capable of massive power for their small size, but spool super fast too, with many people even with small 1.6ltr engines making full boost barely over 3000rpm, but the turbines also flow well enough that many use them on engines as big as 2.3ltr petrol, and even larger diesels- They are very flexible units.