Intake ports and valves....

[hongkongphooey]

As a matter of interest,how finished are the standard intake ports in the head,and do the valves have slightly wasted stems?

I ask because i've had the intake manifold off and the ports look like they've had work and the intake valve stems are slightly wasted.

[hongkongphooey]

Has nobody had a head apart then? 

[75coupe]

I have had a few heads apart, and can tell you that the stems are not normally wasted. The port finish is a cast finish with a line (casting mark ) running through the centre line of the port where the sand cast forms meet. Are the valve guides still protruding through into the port? Do you have a pic? I'll see if I can take a pic of a std head.

[75coupe]

Sorry I got that wrong, the inlets are very slightly wasted stems, just below the guide......

[hongkongphooey]

Sorry I got that wrong, the inlets are very slightly wasted stems, just below the guide......

Yeah that sounds about like mine....the ports however don't have any casting lines,just fine circular lines that look like they have been made by a flap wheel or something. The guides have not been touched by the looks of things.

Thanks

[WestonE]

Hong Kong

Have a look at Guy Croft Racing Engines website there are lots of pictures of tuned and ported components so you will be able to spot 3 angle valve seats and real performance cams.

Eric

[hongkongphooey]

Thanks Eric....i'll do that.