Inline 6 devac

jrios104 · Apr 2, 2026

justhorns said:
Ralph running great!

Awesome! Did you remove the efe aswell? If so did you just cap it?

justhorns · Apr 8, 2026

Not sure. Which is the EFE.

Ricko1966 · Apr 8, 2026

EFE is the exhaust heat riser.

jrios104 · Apr 25, 2026

justhorns said:
Started right up after priming the carb. OK, so I cheated by rebuilding the carb, setting valves, retiming the engine, but, with only a vacuum advance hooked up, and the stock air cleaner. Nothing going to any of the 4 Ported vacuum switches and all the junk removed from the valve cover. Engine runs better than fine (the other mods I did probably). Here is a picture of the back of the carb. Of the 4 ports I only have 2 hooked up, The advance and the secondary vacuum break. The other two for now are disconnected. and plugged. I'm gonna get the charcoal canister working properly, and the manifold preheat (what's gm call it?). Will upload diagram soon. Probably write this up in its own thread, someday.

What did you end up setting the timing to degree wise?

justhorns · Apr 25, 2026

To get it through emissions, it went to stock, on the label. I think it was 10 btdc. I'm about to add 15 more.

justhorns · Apr 25, 2026

Here is a few pictures as it sits now. The air injectors will be removed also. Performance wise, only timing makes a difference.

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Inline 6 devac

jrios104

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justhorns

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Ricko1966

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jrios104

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justhorns

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