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hey guys im looking at building up my car early next year , currently i have around 190kw from fmic , dual stage boost switch , 3 stage heavy duty clutch , bosch 040 pump ,running 10psi , anyway i recently bought a power fc and since then getting around 300kw has been on the cards, and so far i reckon i will need new turbo i think its the hks one on just jap comes with oil lines etc etc , a new oil pump , bigger injectors , maybe twin 040 pumps??? forged pistons and new afm all the work will be done in adelaide either engine on its own or ill send the whole car down , im thinking of sending it to morpowa seeing as they originaly built the car to where it is now before i bought it. so basically what im asking is , have i missed anything??? and will the standard gearbox and diff hold up to the extra power??? im looking at spending no more than 15k any help is appreciated.

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to reliably get 300rwkw you will need a rebuild, a bigger turbo is a must (although you did not mention what you have, with 190rwkw i assume its not standard), oil pump will be fine but may need upgrading depending on what you want to do with the car, bigger injectors, i think a z32 afm will do the job, standard gear box will be fine depending on usage.

Try looking in the rb25 dyno section, that will show you what people have to achieve the power you want.

Also what is a 3 stage heavy duty clutch?

For 300rwkw my build would be as follows.

Decent front mount cooler Blitz or the like.

HKS 3037 Turbo kit @ 20ish psi

lower comp to around 8.5

Decent EBC

Nismo injectors 555's will do the job (740's leave more headroom)

Rebuild bottom end with Forges etc

Z32 AFM

Power FC

Not sure about the 040 but a Nismo Pump will do the job nicely

Gearbox will be fine for street use

Exedy Ceramic clutch

my 2c

buy a real GT3076 or HKS version if you are feeling the need, 550cc injectors, Z32 afm and run it around 270-280rwkw with good tuning on the standard bottom end will be enough to keep you going for a while. this should save you a pile of cash in the short term.

gradually assemble the parts for a forged bottom end if you are feeling the need.

my 2c

buy a real GT3076 or HKS version if you are feeling the need, 550cc injectors, Z32 afm and run it around 270-280rwkw with good tuning on the standard bottom end will be enough to keep you going for a while. this should save you a pile of cash in the short term.

gradually assemble the parts for a forged bottom end if you are feeling the need.

+1

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