Yeah, at about 800 RPM I was seeing 30* or a little more when connected to manifold vacuum. (Base setting of about 12* at the crank) And I know on part throttle Im seeing deep 50s which ive talked about in other threads. I know I need to limit it. I have been waffling between that Crane product you showed and limiting it manually with a screw or something as others have documented.
That is kinda my plan. Limit the canister so it only allows maybe 12* added instead of closer to 18-19. Then maybe give the manifold thing a shot again.
Ive read all the arguments, at least on paper I agree that manifold maybe the way to go.
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1967 Firebird 462 580hp/590ftlbs
1962 Pontiac Catalina Safari Swapped in Turd of an Olds 455
Owner/Creator Catfish Motorsports
https://www.youtube.com/@CatfishMotorsports
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