Port fuel injection and direct injection are similar but distinct systems, so why do some engine designs include both?

Without question, cylinder-head porting is a science. The act of removing metal from the intake and exhaust ports to increase airflow has been used for decades, and in most cases, a skilled head ...

1) What is head porting and polishing and how does it work?Porting involves shaping and/or polishing the intake port openings, the inside of the ports, the exhaust ports, the bowl area below the valve ...

Mopar Performance has been in the aluminum head market for quite a few years now with their Stage VI variations, which deliver the one-two punch of more power and lighter weight. The Stage VI heads ...

Since the days of relieving flathead Fords, we've known about the advantage of porting. Grind those critical passages with the right touch, and airflow through the engine improves-and with more air ...

SAE Transactions, Vol. 107, Section 3: JOURNAL OF ENGINES (1998), pp. 994-1005 (12 pages) This paper reports on the experimental evaluation of the coefficient of discharge of ports in the cylinder ...