4E-FTE with CT-9 - It's stock boost is 0.5 bar (1 bar = 14.5 psi) which is around 7.25psi, that being said - CT-9 on a 4E-FTE is aimed for reasonable amount of power and economy and to be honest it can only hold up to about 10 psi at most and above that it starts to run out of breath.
CT-9 on a 4E-FTE starts to spool at around 1700RPM and boost kicks in around 2200RPM or so and reaches full boost at around 4500RPM then it somewhat starts to run out of breath around 5000RPM and in my perspective it somewhat dies after 5500RPM.
From what I gather from your question, you're trying to skew more power out of CT-9, which I doubt is possible - If you increase the boost, you got to opt for aftermarket wastegate or boost spike might just kill the motor or damage it bad - Which isn't worth the trouble.
I'd suggest you to go for CT-9B (Hybrid) which came in later versions of Starlet Glanza (4E-FTE EP91) - I saw one of those with a friend of mine, and certainly are rare in paki markets - So instead second best option to go for is CT-12B from a 2JZ-GTE Twin Turbo varient - I used that on a 4efte at 12psi with stock internals and produced around 170bhp but keeping it at around 8 or 10psi is best for a daily driver.
8 psi of a CT-9 is equivalent to 4-5 psi of CT-12B - CT-12B will spool at 2200RPM and boost kicks in at 2500RPM and full boost at 4800RPM and does not die all the way to redline.
Hope it helps you! 
Happy Boosting!
