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Registered
Join Date: May 2002
Location: Up North
Posts: 1,449
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Dumb question about pop off valve
I've read lots about pop off valve for CIS cars and even know how/where they fit in a normally aspirated cars.
But where does it fit for a 930? In fact, I remember reading somewhere that the turbo doesn't really need it. So, what's the verdict? thanks...
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87 930 K27HFS/B&B/Twin-Plug... Megasquirted 
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09-06-2002, 11:14 AM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,431
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the turbo has a metal intake, not plastic like normally aspirated 911s 73-83, so if it did backfire, the intake would not blow up. the turbo HAS a pop off valve, but it is really a bypass valve that redirects air back around the turbo when the throttle is closed between shifts, so the boost pressure against the closed throttle doesn't stall the turbo.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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09-06-2002, 11:25 AM
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Registered
Join Date: May 2002
Location: Up North
Posts: 1,449
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John, thanks for the explanation...
It sounds like there is no need for a separate CIS pop off valve for the turbo then? Any idea where is the bypass valve for the turbo?
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87 930 K27HFS/B&B/Twin-Plug... Megasquirted
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09-06-2002, 11:50 AM
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