turbo upgraid
 

Hello, i have just had a de cat exhaust fitted and remap done on my 2.5 wrx. Being power hungry i have since spoke to zen and asked about changing the turbo they suggested a tdo5 20g; bigger intercooler maybe sti type, new fuel pump, and finally remap.The quote for the work was around £2200 and i can't afford all that at once so i was wondering if i can praihaps change intercooler and fuel pump as and when the penny's come in, without having to remap each time.

Fuel pump will be fine.

With the IC change, then to be safe, you ideally need to stay off boost until remap time. If this will do your head in, then I suggest saving for longer and getting the IC, turbo and remap done, say, within a week of each other.

Do not fit the turbo too soon either. Try to arrange it for it to be fitted on one day, with the remap on the following day, for example. And stay off boost!