Reply To: exhaust manifold advise

Home Page Forums Engine exhaust manifold advise Reply To: exhaust manifold advise



If the heat riser is your only concern, don’t worry about it. The manifold heat system which included a hot spot was used to heat the old gas which was not anywhere as volatile as what we use today. Exhaust manifold preheat is now a contributor to vapor lock problems and we routinely block the preheat passages in order to keep the carburetor a cool as possible. I assume that you have the late 29/ manifold which was continued into 1930. On my ’29 I’ve installed an aluminum plate between the two manifolds to stop the hot air movement around the intake manifold.

Good luck.