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forced induction issues (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Michael McCoy on October 21, 2001 at 12:46:38:

well, its kinda set up. I Ghetto-geneered the intake a bit, just to test with until I get the real intake tubing bent. Using flexible plastic tube (some sort of fiberglass reinforced stuff) to connect the turbo to the intercooler.
Had a little mishap with not disconnecting the crank case ventilation tube. blew the dipstick out of its tube and it was followed by about 1/4 of a quart of oil. most of the oil cleared the hood (about a meter in the air from the outlet of the tube?). It was by far the funniest thing I have seen all week. so needless to say, the crankcase is vented to atmosphere now. but now I have other weirdness. like i never get positive pressure in the manifold. I get
as high as 0. means no more vacuum in the manifold, but no boost? kinda strange it seems. the boost gauge is just run off the vacuum line on the intake manifold, T'd with the fuel pressure regulators and the blow off valve. I would assume that would give me correct readings including positive pressure. I also am looking for an optimal way to tune the fuel pressure regulator. (can't do that if it doesn't know i am getting boost though...)any ideas? Is it possible that i am getting lots of pressure and the gauge just doesn't know it? It was enough pressure to blow the
dipstick out of its tube, so there must be _some_ pressure.

-Michael McCoy

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