Reading people's comment on site is making me think my turbo is **** do I need to upgrade my turbo or am I being stupid if so any ideas on what should I get and what power/ torque would I achieve with the below mods.



Hi guys what kind of power should you achieve with theses mods.
It's a blobeye 2004 sti type uk with 28k on clock from new

Aps sr 40 turbo,aps 725 front mount intercooler,aps hard pipe kik,aps 65 mm inner wing,aps bov valve,aps fuelling system, breather kit,800 cc injectors, koyo fast rad, greedy oil cooler,Walbro 255 fp,full 3" Haywood Scott exhaust no cats,RCM headers,RCM up pipe,iridium plugs,Perrin pulleys.

There's probably a lot more I have missed off.
All thoughts would be appreciated.:

 

i dont know why you have made another thread, you were answered on the other one.

the turbo you have very rarely sees above 400bhp, even though its quoted to be a 440bhp turbo, its an old turbo and it is notoriously laggy, i had one on my old car with all supporting mods and it did not make 1 bar til after 4k rpm and would only make 370bhp.

Needless to say it soon got upgraded, if it works and you are happy with the car then leave it (why fix if not broke) , if you want a faster spooling turbo where you can use more of the rev range then get a newer better turbo. simple as that.