DICTIONARY OF AUTOMOTIVE TERMS - "Ih"

I head

An overhead valve engine.

Also See
I-head engine
engine type

I-head

An overhead valve engine.

Also See
I-head engine
engine type

I head engine

An engine where both intake and exhaust valves are placed directly over the piston. The cam is located in the block and the valves are activated by pushrods and rocker arms. Also called "overhead-valve engine" or "valve-in-head engine."

I-head engine

An engine where both intake and exhaust valves are placed directly over the piston. The cam is located in the block and the valves are activated by pushrods and rocker arms. Compare F-head engine where one valve is in the head and the other in the block; and the L-head engine where both valves are in the block and none in the head. Also called "overhead-valve engine" or "valve-in-head engine."

IHP

Acronym for indicated horsepower. Indicated horsepower developed by an engine and a measure of pressure of explosion within cylinder express in pounds per square inch

IHRA

Acronym for International Harmonized Research Activities.