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sudden boost drop higher rpms procharger

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Old 08-27-2020, 05:34 PM
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Well the bov is getting replaced regardless. I have a 50mm flange and I found a percision and tial unit to replace the cheap one. The tial reccomends a 2 psi for supercharger applications, but that doesn't sound right to me. Any input on which one and also what spring I should get for it?
Old 08-27-2020, 06:00 PM
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The lighter the better so it bleeds off at idle and tightens up when it senses boost. Make sure you have a ref line feeding the top of the bov
Old 08-27-2020, 06:22 PM
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Originally Posted by madmann26
Is your crank pinned?
No it is not, will pin and retest.

Originally Posted by BigKID
The bold statement caught my attention. Is there a noticeable power loss associated with the boost drop? Are you seeing an airmass change thru the MAF?

EDIT... I may have misread the statement. I read it as you are seeing the boost drop on teh log but not on the boost gauge however you may mean the log is the only reference you have?
I wouldn't say noticeable, still pulls strong. I'm going off the map sensor, no maf because I'm running speed density.
Old 08-27-2020, 11:33 PM
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I bet it's the crank spinning in the pulley
Old 08-28-2020, 11:12 PM
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Bov or something on the inlet side of the charger sucking shut, a weak coupler or even filter..
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