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Well things aren't going as well as I'd like with this bench.
It's not consistent, and the manometer reading can (depending on circumstances unbeknown to me) fluctuate pretty wildly. This makes getting an accurate reading very hard. When I do manage to get a reading I've found that the same port (with no changes) can fluctuate as much as 15% at low lift and 5% at high lift.
This makes the ability to see improvements from port changes next to impossible.
What am I doing wrong? I saw in porting school #3 the mention of a voltage monitoring/regulating device for the vacuum. Is the lack of this causing my problems?
Any advice would be appreciated.
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