Mallory 4309 and vacuum/boost port?
08-20-2006, 03:23 PM
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Car: '84 Z28
Engine: 406 sb
Transmission: th400
Axle/Gears: Moser M9/5:14 ratio/Billet Locker
Mallory 4309 and vacuum/boost port?
Most of the pictures I've found on here have the vacuum/boost port disconnected. Is it not worth hooking up?
08-20-2006, 03:34 PM
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Car: '84 Z28
Engine: 406 sb
Transmission: th400
Axle/Gears: Moser M9/5:14 ratio/Billet Locker
If it was hooked to a manifold vacuum source wouldn't it lower fuel pressure at an idle and let more fuel return to tank. This could make your fuel pump live longer and run cooler.
08-20-2006, 07:01 PM
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Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
I was having problems with my fuel pressure remaining steady when I had it connected, sometimes the pressure would be 2psi, next start it would be 10psi - so I disconnected it on mine and no more problem.
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