SnoMan proclaimed:

> On 7 Nov 2006 13:23:04 -0800, "Doug" <anothername@access4less.net>
> wrote:
>
>
>>Diesel fuel has more btus (watts) per gallon than gasoline. Diesels
>>engines can be run at higher compression ratios because engines wont
>>ping with the diesel fuel. I think just about all diesel engines are
>>fuel injected (but so are gas now). Anyway, both work. Personally I
>>don't like the noisy, dirty, stinky diesel (prefer gasoline), but they
>>do work well. Make an engine with really big cylinders and big flywheel
>>and you will have a torqy sob no mater what fuel you use.
>
>
>
> Actually diesels ?ping/knock" all the time, that is where noise comes
> from. while there is about a 12% difference in BTU content the biggest
> thing limiting gas engine power and efficency is low octane fuel
> because there are those that think 87 octane is the wonder fuel which
> it is not and detriot has to do a LOT of trickery with timing curves
> and CR ratios to control knock from it which reduces power and MPG. In
> the 60's and early 70's you knew when you were not feeding your engine
> right because it would knock big time but today they mask it with
> knock control that quietly steals your power from you.

High pressure direct cylinder injection appears to be giving a lot of
the benefits of diesel in gas engines.