I apologize if this is being posted twice. I don't think my initial post uploaded.

Does anyone know if increasing intake manifold volume is beneficial? I recently designed and installed a 3/16" intake manifold spacer on my 59ci mercury. I don't have a vbox or a dyno so I don't really have any way of measuring its results. I also had some prop work done and some other modifications done when I put the spacer on. I've heard of guys running 3 gaskets between the manifold and reed plate to increase performance, that is what actually sparked my idea of making a spacer. I'm thinking that this would especially be beneficial on high rpm powerhead with some aggressive port work. What's everyone's thoughts on my idea? Do y'all think this could be a beneficial bolt on part? I also have a few of them available if anyone is interested.

I have uploaded a photo of one installed on my motor. Notice the bare aluminum plate under the manifold.Name: 20200609_190632.jpg Views: 1516 Size: 266.1 KB