Very interesting 292 dyno testing result concerning the higher compression ratio 194 cylinder head yielding less power. In basic four stroke engine design, compression ratio sets the thermodynamic (also personally called thermogoddamics at times) limit on engine efficiency and power. Of course numerous other factors are involved before that limit is reached, such as inlet and outlet flows, combustion surface area, detonation, mixing involving swirl and swish, flame travel, spark intensity, etc.
Tom Lowe's and Twisted 6 Larry's information are both valuable. The standard taken-for-granted modification of installing a cylinder head to raise combustion ratios for increased power may require additional special cylinder head modifications to work in our engines.
How do the BSFC (brake specific fuel consumption) figures compare with the 194 head? Tom Langdon can probably add some insight here, with all of his years dyno testing for General Motors.
Hopefully this discussion on the 194 head will be carried over to the 292 dyno testing thread.
Last edited by Winter; 11/28/09 01:01 PM.
