The Ford Barn - View Single Post - Anyone have experience with this electronic ignition distributor on 1956 Thunderbird?

Ole Don · 03-23-2018, 08:48 AM

At idle 30° or more BTDC tends to cause alarm, but there is no load on the engine. And as soon as there is, the vacuum goes away. Most engine tuners recommend a stock engine be connected to "ported" while a modified street engine will prefer being connected to a straight manifold source, mainly for the reasons mentioned.
This is why it worked so well for me, my 312 had higher compression, big valves, an Isky cam and other goodies. At idle, it had a bunch of advance, and while opening the throttle, both vacuum and advance would drop significantly. It needed 89 octane all the time, and 91 or 93 if I raced. It would eat orange 350's for breakfast. It was a fun car.

03-23-2018, 08:48 AM	#13
Ole Don Senior Member Join Date: May 2010 Location: St. Michael, Minnesota Posts: 1,713	Re: Anyone have experience with this electronic ignition distributor on 1956 Thunderb At idle 30° or more BTDC tends to cause alarm, but there is no load on the engine. And as soon as there is, the vacuum goes away. Most engine tuners recommend a stock engine be connected to "ported" while a modified street engine will prefer being connected to a straight manifold source, mainly for the reasons mentioned. This is why it worked so well for me, my 312 had higher compression, big valves, an Isky cam and other goodies. At idle, it had a bunch of advance, and while opening the throttle, both vacuum and advance would drop significantly. It needed 89 octane all the time, and 91 or 93 if I raced. It would eat orange 350's for breakfast. It was a fun car.