01-02-2018, 02:37 AM
Guys,
The manifold on ebay is a stock original Mc30 intake manifold. It is designed for early Mac engines with the combo reed valve/ piston port induction so it won't work with a motor that is 9 ported unless the third port passage in the manifold is blocked off or filled in. On paper it looks like a good manifold but they don't work very well no matter what you do with them because they are too tall and the long intake tract kills off the top end. If I were the tech guy at an event I would allow it in the Sportsman class for the simple reason that it is not a performance boosting part compared to the other manifolds allowed in the class.
Steve O'Hara
The manifold on ebay is a stock original Mc30 intake manifold. It is designed for early Mac engines with the combo reed valve/ piston port induction so it won't work with a motor that is 9 ported unless the third port passage in the manifold is blocked off or filled in. On paper it looks like a good manifold but they don't work very well no matter what you do with them because they are too tall and the long intake tract kills off the top end. If I were the tech guy at an event I would allow it in the Sportsman class for the simple reason that it is not a performance boosting part compared to the other manifolds allowed in the class.
Steve O'Hara