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Matt
Join Date: Jul 2008
Location: Saint Robert, MO
Posts: 17
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Pop-Off Valve??
Guys, I've looked all over the forum . . . one thing I can't figure out is weather my '77 930 needs a pop-off valve. Every photo I see of the airboxes guys are installing these valves on is different than mine. I've looked on my airbox (unless I'm looking at the wrong part) and can't find a valve that the PO may have installed.
Any thoughts? Thanks for your help. I know this may seem like an elementary question.
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'77 930 with a few mods to include intercooler and K27 turbocharger . . . who needs anything else? |
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06-23-2009, 04:27 PM
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Banned
Join Date: Nov 2007
Location: Rockwall, Texas
Posts: 8,559
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The 930s do not utilize pop-off valves in the airbox . . .
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06-23-2009, 05:40 PM
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Matt
Join Date: Jul 2008
Location: Saint Robert, MO
Posts: 17
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That's what I figured, why was that?
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'77 930 with a few mods to include intercooler and K27 turbocharger . . . who needs anything else? |
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06-23-2009, 07:11 PM
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sudo apt-get purge 930
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,838
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Because it would take an impossibly enormous back fire to blow a metal airbox.
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Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL*** "Worrying about depreciation on your car and keeping mileage down is like not ****ing your girlfriend so her next boyfriend finds her more appealing" --clutch-monkey |
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06-24-2009, 07:29 AM
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Smart quod bastardus
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main reason is they function by opening under pressure in a normally aspo manifold which only sees vacuum. in a turbo we develop positive pressure in the manifold too under boost. to work it would have to have large opening pressure spring which defeats the purpose to some extent.
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1979 930 Turbo....3.4L, 7.5to1 comp, SC cams, full bay intercooler, Rarlyl8 headers, Garret GTX turbo, 36mm ported intakes, Innovate Auxbox/LM-1, custom Manually Adjustable wastegate housing (0.8-1.1bar),--running 0.95 bar max ---"When you're racing it's life! Anything else either before or after, is just waiting" |
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06-24-2009, 07:57 AM
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Herman the German
