Port flow as measured on a flow bench

[Tucurious (Art Ford)]

Has anyone seen any info on actual port flow, as tested, for either the standard head or straight port? I have always noticed a tendency for the outboard cylinders to show a leaner look to the plugs and the center cylinders to look a bit darker. A quick look at any two carb set up makes it easy to see how the center cylinders are favored. I suspect this might be measurable on a flow bench.

[Wiggles (Paul Wigton)]

This concerns the 12, but there may be some information within the thread itself about the XK.

@angelw may have data.

Engine Development - Inlet Ports

I am attempting to rebuild a Jag V12 with a view to achieving in excess of 700bhp in normally aspirated guise. To this end I have been analysing what others have done and have been interesting primarily in asking “what would they do now?” if they could. The output of the engine is constrained by stress limits in the block and flow/stress limits in the heads. And combustion efficiency. I propose (sometime in the distant future) to publish a web site with details of my investigations into these a…

[Tucurious (Art Ford)]

Thanks. There is a lot of theory to digest and possibly some actual suggestions for slight increases if they can be applied to an XK head. I’m not looking for maximum power at top end but sort of like trying to equal things out like in CCing the combustion chambers.

[Mike_S (Mike Spoelker)]

I would think Bill Terry at TT Race Engines could answer those questions.

Tt Engines - Online