Cylinder heads
 

Anyone have any info about knife edging the intake side of the heads.

I’ve never even heard of that on any car. You don’t mean knife edging the crank?

No the heads

Done on oldschool heads with siamiesed inlets.

I ran a 1964 EH Holden in Historic Touring cars 15-20 year ago and this was a 3-litre striaght 6 with a 9-port head. The inlets were siamesed so you have 3 inlet openings feeding 6 cylinders and 6 individual exhaust ports ... and the inlets were knifed edged to get flow separation into each of the inlet valves.

All ports on the same side of the head and the ports went
1 exhaust
1 and 2 inlet
2 exhaust
2 and 3 inlet
3 exhaust
etc etc

Very old-skool !!

Only useful knowledge for old f4rts

That said, VQ engines are 4-valve and knife edging the port separator on the inlets could conceivably give benefit to an all-motor/NA build ....

I'd be surprised if someone has. What I have learned just trying to get people to touch our heads and do a valve job is difficult because they are all afraid of the VVEL ladder. Doesn't head the FSM has do not touch written all over it.

Is good if you have the VVEL delete option though

Hate the vvel.

A good shop can do the work