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PCV valve for boosted engines (Page 1/4) |
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fierosound
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JUL 10, 09:00 AM
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KillerFrogg
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JUL 10, 08:40 PM
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A few other potions (not researched, but just a thought) may be from one of the turbo eco-tech engines, from the SS Coblat, SS HHR i believe, as well as the top end solstice and sky.
Option 2 may be looking at the turbo Small Block Chevy or the 90* v6 aftermarket community to see what PCV they use and see if it is adaptable.
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fierosound
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JUL 16, 07:02 PM
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I'm surprised the guys who added a turbo haven't commented on the need for an appropriate PCV valve before (not that I could find).
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ericjon262
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JUL 16, 07:10 PM
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I use a crankcase evacuation setup the pulls through the exhaust.
http://www.summitracing.com/parts/sum-120108
make sure it's installed after the o2 sensors, and that you have a catch can to prevent pulling oil into the exhaust.
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Neils88
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JUL 16, 07:37 PM
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quote | Originally posted by ericjon262:
I use a crankcase evacuation setup the pulls through the exhaust.
http://www.summitracing.com/parts/sum-120108
make sure it's installed after the o2 sensors, and that you have a catch can to prevent pulling oil into the exhaust. |
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I notice these two points for the evacuation system you used: 1. Cannot be used on vehicles with mufflers 2. Summit crankcase evacuation systems are designed for drag race use only
These may just be emission based concerns....any thoughts?
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josef644
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JUL 16, 07:52 PM
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Any Idea what year this Toyota was? You know they are gonna ask when we go there.
And thank for the information.
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Dennis LaGrua
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JUL 16, 10:19 PM
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AFAIK, PCV valves are one way valves for the suction direction only. If they flowed both ways why would they be called a valve? You are not running in boost mode most of the time so I wouldn't worry too much about continuous crankcase evacuation.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Powerlog manifold, Northstar TB, LS1 MAF, 3" Flotech Afterburner Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE " [This message has been edited by Dennis LaGrua (edited 07-19-2014).]
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fierosound
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JUL 17, 08:11 AM
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quote | Originally posted by josef644:
Any Idea what year this Toyota was? You know they are gonna ask when we go there.
And thank for the information. |
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I thought the part number would cover that so there's no mistake - 1995.
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ericjon262
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JUL 18, 01:25 PM
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quote | Originally posted by Neils88:
I notice these two points for the evacuation system you used: 1. Cannot be used on vehicles with mufflers 2. Summit crankcase evacuation systems are designed for drag race use only
These may just be emission based concerns....any thoughts? |
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1. The idea is that gas velocity will en-train the crankcase gasses and pull them from the the angled tubes, should still work fine with mufflers as long as they aren't super restrictive. similar to how a carburetor works.
2. Setup as a crankcase evacuation system, probably best left to the track, but as a PCV system, it'd probably be fine on the street.
3. Definitely not emissions friendly...
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thesameguy
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JUL 18, 11:37 PM
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You could always run the suction for the thing to the low side of the turbo, where there is never positive pressure. On my XR4Ti, there is an oil separator on top of the valve cover that keeps the big stuff from being sucked into the turbo. On my old 8v Saab there was a separator inside the airbox, so that big stuff accumulated there and the small stuff was filtered by the air filter. There are plenty of turbo cars out there to draw inspiration from - and virtually none of them have a "conventional" PCV valve like GM was half-assing with in the '80s. Personally, I think a catch can filled with steel wool connected to the low side of the turbo should work great. That's how I plumbed my Saab track car, and it's never given a problem. [This message has been edited by thesameguy (edited 07-18-2014).]
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