When does a T3/T4 60 trim work?, is it normal that it is at 4K revs? Options

[Conwa]

I recently installed a T3/T4 60 trim turbo on my 7afe, but is it normal that it start boosting at 4K revs?
I have a B16 manifold and a 2,5 inch downpipe.
It spools up @ about 3,5K but kicks in at 4K and stops at 6200 when it hits the rev limiter (of course)
Its running @ 0.45 Bar (7psi ?)

[lagos]

I guess for me personally i prefer full boost by 3k -3,5k on a celica considering they are geared more for the bottom 1/2 of the RPM range and the head design doesn't support higher RPM. I'm not a huge fan of lag (i was the driver of a 400whp evo T3/t4 50 trim full 21psi @ 4,500rpm and it would smack u in the seat HARD) though off the line using the clutch i could achieve boost faster it still isn't great..
but then again i come from VW with full 18psi @ 3k you wana complain about top end haha i get near 8psi worth of boost drop @ redline cause the damn thing is soo small. But hey if 4k works for you rock on!

but dan, how can you say you prefer boost at ___RPM on a celica, when youve never owned a turbo celica? im not trying to be rude, but its one thing to go for a joy ride in a turbo celica or 400hp evo, and its totally a different thing to own one day in and day out.

here is the way i see it . a larger turbo that spools late will probably be a benefit at the track with a fwd car. it should help get the car off the line with less wheel spin.

on the other hand, a faster spooling turbo will have its benefits on the street. great throttle response and less need for downshifting on the highway will be a benefit. but getting off the line will be a lot harder since the turbo will break the tires loose much sooner in the rpm range.