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Hey guys first time poster here and looking for some help, I'm about to list every part I have accumulated over the last 1 year in preparation for my r34 GTT manual going in to get built in the next coming weeks

Firstly just like most, my initial plan changed midway and now I'm going slightly bigger turbo 

I have purchased a garrett g30-900 1.01 A/R now previously I had a 3076 (aeroflow turbo) but sold it and decided to go garret. With previous turbo I had purchased a 45mm turbosmart hypergate (14 PSI) 

However now that I have a garrett g30-900 I was wondering is my 45mm turbosmart too small for my set up?

I'm aiming for 500kw on high boost (but will have a low boost setting of about 300kw)

Should I look into getting the 50mm progate or is 45mm OK? I do want some response 

My current list of parts are:

ARP head studs 

arp main studs 

Nitto head gasket 

6 boost manifold 

Turbosmart wastgate 45mm 

Fuel regulator turbosmart fpr6

Fuel rail plazmaman 

Injectors 1650cc Bosch

Turbo garret g30-900

Plazmaman intercooler 

Plazmaman full billet intake manifold 

haltech 2500 

Haltech ic7 

Radiator PWR 

ATP Oil catch can 

Twin plate clutch exedy organic 

Kelford 264 cams 

Kelford spring & retainers 

Supetech valve set 

Nitto I beam rods 

Nitto pistons 86.5

Nitto oil pump and crank collar 

HKS Cam gears 

Prp trigger kit 

ati Harmonic damper 

Astra electric power steering 

2x 525 Fuel pump wallbro and Surge tank

prp ls1 rb25 alternator kit 

R35 coil packs

Aeroflow sump

Hi-Flow pick up for sump

Engine mounts tuff

Radiator overflow bottle

Nitto head drain 

Battery relocation kit 

CAN keypad

1.1mm restrictors 

Gktech clutch fan

I haven't purchased ACL bearings yet I'll just get the builder.to organise thos according to clearance 

Block head and crank will all be machine bore honed etc...

 

I'd go the 50mm gate. The 45 might do everything you want, but it would be such a pain in the arse to do all the work fitting it, only to find out its a little too small for what you want. 

For the small outlay at the start, I'd play it safe and just go with the 50mm gate.

Side note, that's a pretty sexy build you've got in the works.

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