Cheers,this is just what i needed to know.I have sard 650s,large walbro fuel pump,split fire coil packs.7 years back when i had the turbo done the most ever got out of it was 215kw on a good day,she just ran out of puff.I don't want to be dissapointed again.Been to many tuners over the years and they all said the same thing runnung out of puff.The 34 might just be the way to go for me.Need a safe tune as she is my daily,had compression test done today across all 6 cyl between 155 and 165,mech said that was pretty good.I have a series 2 motor in her now so i hope i can have a bit more safe power,got 314000 on the clock now,never at home.I would hope gcg puts a larger rear housing on these days,that seemed to be where the restriction is on mine.Might check out gcg see what there doing these days. Ps have the z32 as well.