Re: Alpine Engine Compartment Questions

John Souders (frodo4(at)ix.netcom.com)
Thu, 27 Jun 1996 15:07:16 -0700

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You wrote: >
>Steve,
>
>My guess on the second manifold opening is that it attaches to the
vaccum >advance for the distributor. It, along with the mechanical advance
(springs and >weights under the points plate), adjusts your ignition timing.
>
>Brian
>
No - the vacuum for the distributor comes off the carb. It is a ported vacuum take off, meaning that when the throttle plate is closed the vacuum port is covered and vacuum is not present. Under driving conditions when the car in under load or accelerating the vacuum causes the distributor to retard the ignition to prevent pinging. At cruising, there is little vacuum and the ignition advances. The manifold take off on the manifold is for the PCV system.

John Series IV

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Maybe in reply to: Steven Semeraro, ATR,: "Alpine Engine Compartment Questions"