This is not to start the fight about heat risers.
I'm installing an Offey dual manifold and Fenton exhaust on a 235.
The intake manifold heat kit is a plate with a single 1/2 inch copper tube connection to 1 header.
There is no outlet/circulation. Trying to push exhaust into a closed container is not very useful.
Further, on a stock manifold the carb is directly above the heat riser so any unatomized droplets fall on the hot spot. Here the carbs are equidistant on either side of the heat source. So half the flow from each is away from the center and half toward.
Yes I know there is a a channel cast the full length, but that assumes something is going to circulate through it.
No, I really don't want to run a hot water system.
Since the headers run directly under the full length of the manifold and actually touch in a few spots, has anyone ever documented any actual improvement by adding the exhaust heat kit?
