Re: gasoline powered 7.3 Power Stroke

Posted by scotc on February 06, 2011 at 19:56:52 from (72.101.231.77):

In Reply to: Re: gasoline powered 7.3 Power Stroke posted by 43warhorse on February 05, 2011 at 18:45:08:

The 6.9 and 7.3 diesels are indirect-injection, compression-ignition engines. The 7.3 Powerstroke, as well as the 6.0, 6.4, and new 6.7, the Duramax, and Cummins are direct-injection compression-ignition engines. Gasoline motors are spark-ignition motors. Compression has to be kept low on them to prevent pre-ignition because the fuel is drawn in with the inatake air, before compression. Compression-ignition motors have the fuel injected into the cylinder near TDC (top dead center), eliminating the chance for pre-detonation.

As for combustion temperature, diesel has about 30-35% more BTU per volume than gasoline. So how does the gasoline burn hotter? It doesn't, it burns colder.

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