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BAE turbo installed ok, but we routed the PCV wrong
It seems like we have pressurized the crankcase PCV system.
Can anyone help us figure out which hose(s) we connected wrong? I'll reach in there and try to take some pics in case anyone here has been through this.
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2000 Boxster S 2004 330ci convertible 1978 450 SLC 1924 Model T Ford touring Fleet of Ford Buses, Sedans, SUVs and Limos |
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10-09-2010, 11:01 AM
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Where is your oil-tank vent hose going? You may need an oil catch-can in the crankcase/oil-tank ventilation setup.
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Steve Sapere aude 1983 3.4L 911SC turbo. Sold |
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10-09-2010, 11:14 AM
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Sherwood |
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10-09-2010, 11:15 AM
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Connect the crankcase vent hose on the suction side of your turbo and upstream of the throttle .Perhaps directly into the airfilter
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1980 911 SC 3.6 coupe sold 1995 993 coupe 1966 Mustang Shelby clone 1964 Corvair Spyder Turbo gone 2012 Boss 302 |
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10-09-2010, 11:30 AM
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Happiest when Tinkering
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Connect the crankcase vent to oil tank and vent oil tank to catch can and atmosphere vent to turbo suction will suck oil vapor into turbo.
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10-09-2010, 12:40 PM
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The idea of positive crankcase ventilation IS to draw blowby vapour into the engine to be burned. You may need to restrict the flow and consider a catch can seperator to get just vapour and not any quantity of oil. The vent hose has a restrictor in it already as it is usually connected to manifold vac in a NA application.Venting into the airfilter would be my choice.
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1980 911 SC 3.6 coupe sold 1995 993 coupe 1966 Mustang Shelby clone 1964 Corvair Spyder Turbo gone 2012 Boss 302 |
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10-09-2010, 03:38 PM
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what about a getting pvc valve from a 930 ? that should have a check valve to prevent the boost pressure from pressurizing the crank case.
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10-09-2010, 05:42 PM
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A check valve won,t work because you would then have nil crankcase evacuation when you need it the most. blowby is greatest under boost. The early 930 used a simple vent system similar to what I am suggesting. later 930 added a catch can and drainback hose to assist in oil/vapour seperation.
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1980 911 SC 3.6 coupe sold 1995 993 coupe 1966 Mustang Shelby clone 1964 Corvair Spyder Turbo gone 2012 Boss 302 |
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10-09-2010, 05:59 PM
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You need to put some photos up of what you have. Have you done a leakdown test?
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Patrick E. Keefe 78 SC |
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10-10-2010, 03:25 AM
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Old Yeller
Boxster
1983 Porsche 911SC
