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Registered
Join Date: Jun 2009
Posts: 745
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where can I purchase a 0.9 bar spring??
where can I purchase a 0.9 bar spring for the stock wastgate ?
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06-07-2009, 09:31 PM
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Twins are more fun!
Join Date: Dec 2005
Posts: 639
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James Carrera TT (3.3, Protomotive MAP ECU, EFI, GT2 EVO CAMs, Twin Plugged, Twin Turbo's) |
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06-07-2009, 10:11 PM
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Registered
Join Date: Jun 2009
Posts: 745
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do I need 38 or 44 MM for the stock wastgate?
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06-08-2009, 04:57 AM
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Twins are more fun!
Join Date: Dec 2005
Posts: 639
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46mm
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James Carrera TT (3.3, Protomotive MAP ECU, EFI, GT2 EVO CAMs, Twin Plugged, Twin Turbo's) |
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06-08-2009, 02:07 PM
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Metal Guru
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I believe that Tial wastegate springs will not work in a factory wastegate.
Spring sizes available for the factory wastegate are .7 bar , .8 bar, 1 bar and 1.2 bar. The .7 and .8 wastegate springs are, to my knowledge, only available as used. The 1 and 1.2 bar springs are available from Weltmeister through Performance Products. To achieve .9 bar you will have to do one of the following: (1) Buy a Tial 46 mm wastegate as James has stated and select the correct spring that yields .9 bar on a boost gauge (on my 965 with a stock exhaust that was a .8 bar spring). (2) Find a factory .7 or .8 bar spring, install it, a mechanical boost controller and a mechanical boost gauge and adjust until you achieve .9 bar.
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Paul B. '91 964 3.3 Turbo Port matched, SC cams, K27/K29 turbo, Roush Performance custom headers w/Tial MV-S dual wastegates, Rarlyl8 muffler, LWFW, GT2 clutch & PP, BL wur, factory RS shifter, RS mounts, FVD timing mod, Big Reds, H&R Coilovers, ESB spring plates- 210 lb |
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06-08-2009, 03:32 PM
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1991 Porsche 964 Turbo
