donaldg

anyone ever hear of a 90 or 91 300zx gtz stillen stage 9? original owner says it was one of 2 built? trying to get some info on her.

NismoPick

First Google-Machine result....

NZ 300ZX & GTR Owners Club Technical

Stillen Chart - 300ZX TT
Stage Modifications Required Approximate M-T HP at Flywheel & Boost Pressure
Stock None 300hp @ 9.5 psi
I Performance cat-back exhaust system 320hp @10 psi
II High flow intake 340hp @ 10.5 psi
III ECU EPROM upgrade & boost jets 396hp @ 13.5 psi
IV Larger intercoolers 405hp @ 13.5 psi
V EVC 418hp @ 14.5 psi
VI 555cc injectors & 550 type turbo upgrade 445-500hp @ 16.5 psi
VII Dual high flow intake 520hp @ 16.5 psi
VIII 600 type turbo upgrade 620hp @ variable psi
IX NOS 680-760hp @ variable psi

Stillen Chart - 300ZX NA
Stock None 222hp
I Performance cat-back exhaust system 234hp
II Computer Upgrade & Intake 254hp
III Nitrous Oxide & Injector Upgrade 300-320hp

SGP Chart - 300ZX TT
Stock None 300hp @ 9.5 psi
I JWT POP charger & Underdrive pulley 305-325 hp 10 psi
II JWT ECU upgrade & boost jets 365-380 hp 12-14 psi
III B&B test pipes & Gut pre-cats 385-400 hp 12-14 psi
IV Performance cat-back exhaust system 400-415 hp 12-14 psi
V EVC 420-435 hp 15 psi
VI JWT NOS system 490-505 hp 15 psi
VII Larger intercoolers 495-510 hp 15 psi
VIII JWT dual POP charger 510-525 hp 15 psi
IX Ported throttle bodies & Matched intake 515-530 hp 15 psi
X Nismo 555cc injectors 530-545 hp @ 17 psi
XI Sport 500 turbos
Sport 600 turbos
Sport 650 turbos (cam upgrade required)
555-575 hp @ 17-21 psi
560-605 hp @ 17-21 psi
620-675 hp @ 17-21 psi

XII JWT cams & SGP head package 640-695 hp @17-21 psi

SGP Chart - 300ZX NA
Stock None 222hp
I JWT POP charger & Underdrive pulley 238 hp
II JWT ECU upgrade 250 hp
III Performance cat-back exhaust system (also ALC for A-T) 262 hp
IV Stillen headers 279 hp
V Ported throttle bodies & Matched intake 290 hp
VI Injector upgrade & JWT NOS system 390 hp
VII SGP head package (porting & 5 angle valve job) 420-430hp

akuma_z31

i’ve recently picked up a 90 twin turbo with 62k on the odometer that was built by stillen back in the 90s, is there any more info on these cars?