This is the first proto type casting. They will machine it this week, then box it up and send to me in just in time for the Inliners Convention. Since we don't have time to fully machine (and still get it here in time), this one is for visual purposes only. 
They need to make a couple small changes before casting more. However, the next castings will be fully machined and assembled for flow testing and dyno runs. Once were sure were happy with it, we'll start the production runs.
I've had a lot of guys e-mail and ask me if this was for real. I guess they are to use to being told "we are working on it", only to see nothing materialize. Well here's proof its for real.
It may not look much different than a cast head, but the ports are completely redesigned and flow considerably better. However, I don't want to release the numbers until we actually flow test the real mccoy.
If you look closely, you will notice it's taller than a cast head. This required us to order custom valves with longer stems, however SI is producing a PortFlow series valve to suit our needs. Corteco has also agreed to produce a high performance gasket suited specifically to the new head. Existing headers will work fine in most cases, but we are looking into custom headers with larger diameter primaries for engines built with more HP in mind. We will publish the exact specs and recomendations once we dyno the heads.
They need to make a couple small changes before casting more. However, the next castings will be fully machined and assembled for flow testing and dyno runs. Once were sure were happy with it, we'll start the production runs.
I've had a lot of guys e-mail and ask me if this was for real. I guess they are to use to being told "we are working on it", only to see nothing materialize. Well here's proof its for real.
It may not look much different than a cast head, but the ports are completely redesigned and flow considerably better. However, I don't want to release the numbers until we actually flow test the real mccoy.
If you look closely, you will notice it's taller than a cast head. This required us to order custom valves with longer stems, however SI is producing a PortFlow series valve to suit our needs. Corteco has also agreed to produce a high performance gasket suited specifically to the new head. Existing headers will work fine in most cases, but we are looking into custom headers with larger diameter primaries for engines built with more HP in mind. We will publish the exact specs and recomendations once we dyno the heads.
Really great job, keep the products coming!
