Nice article on turbos the
http://www.answers.com/topic/Turbocharger



"JP Roberts" > wrote in message
...
> As usual you're totally wrong once again.
>
> "Pinging" is only a vulgar form of addressing the technical word
> "Detonation". I'm not surprised that you only knew the vulgar form, given
> your poor education.
>
> What really surprises me, and in all probability everyone in this
> newsgroup, is how on earth you might ever have managed to be a petroleum
> chemist without this knowledge. Then again you wrote "former". I guess
> that was just a case history of redundancy? LOL
>
> Pinging is just a poor attempt at simply describing the metallic noise the
> engine makes when there are instances of detonation. Knocking is yet
> another way of describing this.
>
> Collins English Dictionary definition for "ping":
>
> 1.- a short high-pitched resonant sound, as of a bullet striking metal or
> a sonar echo.
>
> I suggest you read this, just in case you want to seek a new job in the
> Petroleum Industry of the Uneducated:
>
> http://www.answers.com/topic/engine-knocking
>
> Engine knocking
>
> Knocking (also called pinking or pinging)-technically detonation- in
> internal combustion engines occurs when fuel in the cylinder is ignited by
> the firing of the spark plug and smooth burning proceeds but some of the
> unburned mixture in the combustion chamber explodes before the flame front
> can reach it, combusting suddenly before the optimum moment of the
> four-stroke cycle. The resulting shockwave collides with the rising
> piston, creating a characteristic metallic "pinging" sound.
>
> Anyway, why bother to answer any of your low posting again?
>
> ...
>>
>>
>> JP Roberts wrote:
>>>
>>> The Octane number is just a measure of how easily the fuel will
>>> self-ignite,
>>
>>
>> Bzzzt.
>>
>> Octane number is measure of the fuel's resistance to *detonation.*
>> Self-ignition is called "ping", and that's something different.
>>
>> Turbomotors should use the highest available octane fuel, due to
>> effective compression ratio and charge temperature. 98 RON or better.
>>
>> E.P. (former petroleum chemist)
>>
>
>