[blykins]

I can't take credit for it, Lawes Mayfield did the port work. There are a few bottlenecks in a TP port...the sheer size of it can be one. The pushrod tubes going down through the intake ports can be another. These don't have many bottlenecks now though....

A tidbit of info is that a smooth port isn't always a good thing. A rough CNC finish or even dimples in the port can work wonders. Think of a golf ball... Sometimes it makes more horsepower, sometimes it doesn't make more horsepower, but makes the engine more efficient, to the point where you can pull fuel out to hit the A/F ratio target.

Got up this morning and it's 1 degree here. Global warming?