Stage Charts
- 300ZX
Stage Charts
- 300ZX
Stillen came up with the first stage chart, as a rough guide to how the most effective way to upgrade 300ZX's. Unfortunately, with the new mods coming onto the market, their charts are a bit outdated. So, SGP Racing, one of the best 300ZX tuners in the USA, came out with their own guide. Both are included below, for both the TT and NA versions.
| 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 |
555-575 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 |