Spooling a PTE SC61 Snai nowl, On a 1.8L that can suck some air in(and out). I see full boost by 5600RPM, A bit quicker spool-up time would be nice, but traction down low will suffer even more that it is if that were to happen. But within a month, the NEW GT35R will be going on due to the damage the SC61 received a few monthes ago from a hasty owner and a un/used A/C harness plug