Question on port matching
A Weiand Action+ on a set of 318 heads no need to bother, but on a set of 340/360 heads, definitely a case of “really off” and requires some work. The actual runners are fine, it’s the abrupt tapering down of the roof of the runners to the smaller port opening that is horrendous. A rough sketch for those who haven’t laid eyes or fingers on one of these:
A Weiand Action+ on a set of 318 heads no need to bother, but on a set of 340/360 heads, definitely a case of “really off” and requires some work. The actual runners are fine, it’s the abrupt tapering down of the roof of the runners to the smaller port opening that is horrendous. A rough sketch for those who haven’t laid eyes or fingers on one of these:
