I4 inlet manifold again

[jiwillia]

Rapid - in practice each manifold would be bespoke to suit the throttle bodies used.

Matt - The inlet casting port cross section is nominally 35mm square with a wall thickness of 6mm. The stubs are 50mm outside diameter and 40mm inside diameter to match the throttle bodies. After welding I used a carbide burr to blend the round/square bores followed by a good polishing. There was enough material to get a reasonable blend without breaking out.
the throttle bodies comfortly clear the chassis brace. I have set the engine height to ensure a reasonable ground clearance. This means that I will have to cut the bonnet to allow the cam cover to protrude. I have added a photo showingthe chassis brace /manifold clearance.

John