|
Granted, unless you're working on prewar antiques, you're unlikely to ever see a transition as stark as image 1, but it does create an excellent visual aid for how flow increases with less dramatic valve seat angles. Image 2 is similar to many early heads with a single 45-degree valve seat, image 3 is a three-angle cut, and image 4 represents a four-angle similar to what FPS uses with 30-, 45-, 60-, and 75-degree cuts from top to bottom. View Related Article
|
|