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Originally Posted by psfred
Later model turbos (85 california, 86 49 state engines) have an air recirculation valve that vents boost back into the air intake duct -- this is both to keep the turbo up to speed and for the trap oxidizer that you don't have. On the KKK it's on the front of the housing, I think somewhere else on the Garret, but I'm not sure. Just leave the vacuum line off, you don't need it in your application.
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Thats the whachamacalli was talking about. Interesting about keeping the turbo up to speed. Do you think that functionality would keep the turbo spooled during gear shifts (manual remember)?
Quote:
How did you measure vacuum pump output? I thought those pumps (post 76) vent into the crankcase, not the intake manifold, so there is no accessable output.
Peter
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I unhooked the main vac line and plugged the mighty vac up to it. It also seemed to go up in stages? I'll check it again when I swap the line and booster from my old daily driver. The inline check valve appear to be ok, but without the auto tranny there is no need for it right?