Thread: incredibly hot engine bay temps, need advice or suggestions 41 Willys 350, pics insid

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Originally Posted by 36 sedan

Since the problem started with the carb change, have you perhaps connected your vacuum advance to the timed port (above throttle port) on the carb instead of the manifold (below throttle port)?

Interesting info here on this and how it effects idle and low speed motor temps;manifold vacuum versus ported vacuum

Now this is interesting, I didnt tune the carb in or time it as I had a shop take care of that. They capped the timed port on the carb and removed the vacuum advance line off the distributor. The timing is set at 36 degrees, when I asked them about it they said that it did not need to be hooked up. However its having some cool starting issues so it is going back to them and they said that they will hook it back up and re-time it.

That read is interesting, that guy is running the same carb as me minus the electric choke. Ive been told not to run manifold vacuum though, I have a electronic Mallory ignition if it matters.

As I read there it seems like they are recomending manifold vacuum...interesting. So as I understand it and correct me if im wrong, the engine is running leaner at idle which of course makes things warmer inside naturally. So with ported vacuum advance from the carb its basically not adding spark timing therefore running warm, where as with manifold vacuum its adding spark timing in at idle.