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Posted by hoss on May 30, 2003 at 11:34 AM
  This message has been viewed 77 times.
     
In Reply To Newb Question/free mods? posted by 93SCTT on May 30, 2003 at 11:21 AM
     
Message from: [ http://www.twinturbo.net/ttnetfaq/appendixz.aspx#Stages ]

This is the standard benchmark Twinturbo Z stage chart. Most people use this as
their performance upgrade path:



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


This standard stage chart is a bit dated.

SGP Performance has made an updated TT chart to include newer
modifications & rearranged a few of the steps in their performance upgrade
path. On the forum, you'll see this noted as SGP Stage ????.






























































Stages: Modifications Required:Approximate M-T HP at Flywheel & Boost Pressure
Stock None 300hp 9.5 psi
Stage I JWT POP charger & Underdrive pulley 305-325 hp 10 psi
Stage II JWT ECU upgrade & boost jets 365-380 hp 12-14 psi
Stage III B&B test pipes & Gut pre-cats 385-400 hp 12-14 psi
Stage IVPerformance cat-back exhaust system 400-415 hp 12-14 psi
Stage V EVC 420-435 hp 15 psi
Stage VI JWT NOS system 490-505 hp 15 psi
Stage VII Larger intercoolers 495-510 hp 15 psi
Stage VIII JWT dual POP charger510-525 hp 15 psi
Stage IX Ported throttle bodies & Matched intake 515-530 hp 15 psi
Stage X NISMO 555cc injectors 530-545 hp 17 psi
Stage 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

Stage XIIJWT cams & SGP head package 640-695 hp 17-21 psi


















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