Aluminum Cylinder Heads Urged as Way to Better Design

MEASURED gains in performance obtained by using aluminum instead of iron for cylinder head material come from the increased compression ratios possible, Mr. Kishline says, and recommends higher ratios “as a logical means for the engineer to use in creating better transportation.”

He gives actual figures taken from observed dynamometer performance showing comparable results on similar engines with aluminum and iron cylinder heads. Desirable features of aluminum heads are presented, after which are discussed design improvements necessary if such heads are to be used successfully.

Differences in combustion phenomena resulting from use of iron and aluminum heads also are outlined.