@Stevehose , i noted in a zenith string you mentioned:
"based on experiments with a balance pipe system on my triples, I believe the smoothness comes from added slight richness with the pipe allowing residual mixture to be sucked in from the other manifold(s). I never confirmed it on Zeniths but did on the triples."
Do you connect all three manifolds together directly from manifold vacuum port on the carbs? I am interested to know if you think it smooths out some of the vacuum pulse signals.
I have the coupe running, not well yet though. I didn't have time to put the air fuel meter on, but I did put a vacuum gauge on the manifolds and have never seen anything so crazy. The bounce would normally indicate valves or head gasket. I did adjust the valves, but have no symptoms that would indicate a head gasket issue.
"based on experiments with a balance pipe system on my triples, I believe the smoothness comes from added slight richness with the pipe allowing residual mixture to be sucked in from the other manifold(s). I never confirmed it on Zeniths but did on the triples."
Do you connect all three manifolds together directly from manifold vacuum port on the carbs? I am interested to know if you think it smooths out some of the vacuum pulse signals.
I have the coupe running, not well yet though. I didn't have time to put the air fuel meter on, but I did put a vacuum gauge on the manifolds and have never seen anything so crazy. The bounce would normally indicate valves or head gasket. I did adjust the valves, but have no symptoms that would indicate a head gasket issue.