Turbo Choice And Mods To Compensate

[foley]

hey i have started buying parts for my skyline (greddy style intake, top mount exhaust manifold, stealth intercooler, haltech ecu) but now i want to know couple things about this turbo im looking at, it has different size trims or A/R its a T04Z ball bearing garrett . im looking for one to give me quick response and im only looking for around 400-500 hp to get out of it, i know smaller the quicker but when would it be to small and start making me lose top end power?

different A/R .70 .84 1.00 1.15 1.32?

also i only have standard injectors so what size should i go....550cc or 740cc.

[PM-R33]

Completely wrong turbo choice for that kind of power.

[paulr33]

a t04Z is a poor choice turbocharger regardless of trim or housing sizes for 298kw or (400hp)

id recommend checking out the GT30 series instead and you will effectively have a better overall power band

the power band is the difference between a lag monster (read T04Z on 2.5l) and a progressive turbo setup GT30 with external wastegate

browse the rb25 turbo upgrade thread, pick your power and look at what mods and turbocharger combinations they have used

this saves guess work and "will this be laggy" type questions as you can see all the mods and what turbo spec etc

[R31Nismoid]

Please read the RB25 dyno sticky and do a little bit of research.

Thanks.