On Fri, Jul 22, 2011 at 2:52 PM, wrote:
>> ..As some people on the list have noticed (Kaleb for one), the mid-'80s
>> Mercedes engines that supposedly require premium---the M103 in the
>> 300E, for instance---run just fine on regular, so they are apparently
>> sophisticated enough to retard their timing correctly to avoid knock.
>>
> Not on that car which had a conventional ignition system. The M104 was a
> Motronic engine with knock sensors.
Yeah, just after I hit "send" I was thinking I was wrong about that.
I remember when it was a big deal that the first Saab Turbos could
adjust timing on the fly to maximize boost with whatever grade of gas
they were getting. Didn't remember exactly when that feature was
folded into the main evolutionary tree, so to speak, of Bosch gas
injection systems.
Alex
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