Gasoline
#21
Guest
Posts: n/a
Re: Gasoline
In message <GCZte.1554855$I96.1855935@telenews.teleline.es>
"Exceso" <exceso@elcaminodelexceso.es> wrote:
> I've read that the choice of one or another type of gasoline depends of the
> compression ratio of your car, not estrictly of the power.
It's correct that compression ratio may be the major factor in
determining what octane rating best suits an engine, but there will be
other, less significant, factors. Do remember, though, that a
compressor (turbo or super-charger) does, in effect, increase the
compression ratio significantly.
--
Peter Bell (Note Spamtrap - To reply, replace 'invalid' with 'bellfamily')
"Exceso" <exceso@elcaminodelexceso.es> wrote:
> I've read that the choice of one or another type of gasoline depends of the
> compression ratio of your car, not estrictly of the power.
It's correct that compression ratio may be the major factor in
determining what octane rating best suits an engine, but there will be
other, less significant, factors. Do remember, though, that a
compressor (turbo or super-charger) does, in effect, increase the
compression ratio significantly.
--
Peter Bell (Note Spamtrap - To reply, replace 'invalid' with 'bellfamily')
#22
Guest
Posts: n/a
Re: Gasoline
In message <GCZte.1554855$I96.1855935@telenews.teleline.es>
"Exceso" <exceso@elcaminodelexceso.es> wrote:
> I've read that the choice of one or another type of gasoline depends of the
> compression ratio of your car, not estrictly of the power.
It's correct that compression ratio may be the major factor in
determining what octane rating best suits an engine, but there will be
other, less significant, factors. Do remember, though, that a
compressor (turbo or super-charger) does, in effect, increase the
compression ratio significantly.
--
Peter Bell (Note Spamtrap - To reply, replace 'invalid' with 'bellfamily')
"Exceso" <exceso@elcaminodelexceso.es> wrote:
> I've read that the choice of one or another type of gasoline depends of the
> compression ratio of your car, not estrictly of the power.
It's correct that compression ratio may be the major factor in
determining what octane rating best suits an engine, but there will be
other, less significant, factors. Do remember, though, that a
compressor (turbo or super-charger) does, in effect, increase the
compression ratio significantly.
--
Peter Bell (Note Spamtrap - To reply, replace 'invalid' with 'bellfamily')
#23
Guest
Posts: n/a
Re: Gasoline
Obviously, because of less potential detonation problems. These are
exacerbated by hot temperatures as the intercoolers in the early 1.8T are
somewhat underengineered considering the demands of chipped cars. The net
result is hotter air intake, which means the fuel mixture shows a tendency
to self-ignite at the wrong times for the engine - read detonation
translating into less power per time unit.
The chips adjust the fuel-air-boost map to provide maximum efficiency, but
they also advance ignition timing to the maximum bearable by the engine,
given a particular temperature. The engine is possessed with two detonation
sensors, and the moment the ECU detects any instance or this happening, it
will delay ignition, thus providing less energy release per fuel unit - read
power. The problem with this is that even if the ECU and sensors do a fine
job, there always needs to be detonation for the system to delay timing -
read the fewer the instances of detonation before the system acts the less
stress on the engine in the long term.
The Octane number is just a measure of how easily the fuel will self-ignite,
therefore, the higher this number, the better the fuel in terms of lower
detonation, which translates into lower consumption as the fuel is more
efficiently burned because it is not being burned at the wrong times.
JP Roberts
"Dave" <dave@nobody.com> escribió en el mensaje
news:6DXre.17424$m4.10249@newsfe3-gui.ntli.net...
>> Obviously the SuperPlus98, but if your car is not chipped, then the 95
>> will just do the same job at a cheaper price.
>>
>> The higher the Octane number, the better the engine will run in the
>> summer when it's hot.
>
> Why do you say obviously?
>
> Buying 98 for that engine is probably just going to empty his wallet
> faster. 163PS isn't a particularly high power output so it should be happy
> on good quality 95. AFAIK, the 1.8T from 180PS and up requires 98 for full
> power and better fuel consumption.
>
>
>
exacerbated by hot temperatures as the intercoolers in the early 1.8T are
somewhat underengineered considering the demands of chipped cars. The net
result is hotter air intake, which means the fuel mixture shows a tendency
to self-ignite at the wrong times for the engine - read detonation
translating into less power per time unit.
The chips adjust the fuel-air-boost map to provide maximum efficiency, but
they also advance ignition timing to the maximum bearable by the engine,
given a particular temperature. The engine is possessed with two detonation
sensors, and the moment the ECU detects any instance or this happening, it
will delay ignition, thus providing less energy release per fuel unit - read
power. The problem with this is that even if the ECU and sensors do a fine
job, there always needs to be detonation for the system to delay timing -
read the fewer the instances of detonation before the system acts the less
stress on the engine in the long term.
The Octane number is just a measure of how easily the fuel will self-ignite,
therefore, the higher this number, the better the fuel in terms of lower
detonation, which translates into lower consumption as the fuel is more
efficiently burned because it is not being burned at the wrong times.
JP Roberts
"Dave" <dave@nobody.com> escribió en el mensaje
news:6DXre.17424$m4.10249@newsfe3-gui.ntli.net...
>> Obviously the SuperPlus98, but if your car is not chipped, then the 95
>> will just do the same job at a cheaper price.
>>
>> The higher the Octane number, the better the engine will run in the
>> summer when it's hot.
>
> Why do you say obviously?
>
> Buying 98 for that engine is probably just going to empty his wallet
> faster. 163PS isn't a particularly high power output so it should be happy
> on good quality 95. AFAIK, the 1.8T from 180PS and up requires 98 for full
> power and better fuel consumption.
>
>
>
#24
Guest
Posts: n/a
Re: Gasoline
Obviously, because of less potential detonation problems. These are
exacerbated by hot temperatures as the intercoolers in the early 1.8T are
somewhat underengineered considering the demands of chipped cars. The net
result is hotter air intake, which means the fuel mixture shows a tendency
to self-ignite at the wrong times for the engine - read detonation
translating into less power per time unit.
The chips adjust the fuel-air-boost map to provide maximum efficiency, but
they also advance ignition timing to the maximum bearable by the engine,
given a particular temperature. The engine is possessed with two detonation
sensors, and the moment the ECU detects any instance or this happening, it
will delay ignition, thus providing less energy release per fuel unit - read
power. The problem with this is that even if the ECU and sensors do a fine
job, there always needs to be detonation for the system to delay timing -
read the fewer the instances of detonation before the system acts the less
stress on the engine in the long term.
The Octane number is just a measure of how easily the fuel will self-ignite,
therefore, the higher this number, the better the fuel in terms of lower
detonation, which translates into lower consumption as the fuel is more
efficiently burned because it is not being burned at the wrong times.
JP Roberts
"Dave" <dave@nobody.com> escribió en el mensaje
news:6DXre.17424$m4.10249@newsfe3-gui.ntli.net...
>> Obviously the SuperPlus98, but if your car is not chipped, then the 95
>> will just do the same job at a cheaper price.
>>
>> The higher the Octane number, the better the engine will run in the
>> summer when it's hot.
>
> Why do you say obviously?
>
> Buying 98 for that engine is probably just going to empty his wallet
> faster. 163PS isn't a particularly high power output so it should be happy
> on good quality 95. AFAIK, the 1.8T from 180PS and up requires 98 for full
> power and better fuel consumption.
>
>
>
exacerbated by hot temperatures as the intercoolers in the early 1.8T are
somewhat underengineered considering the demands of chipped cars. The net
result is hotter air intake, which means the fuel mixture shows a tendency
to self-ignite at the wrong times for the engine - read detonation
translating into less power per time unit.
The chips adjust the fuel-air-boost map to provide maximum efficiency, but
they also advance ignition timing to the maximum bearable by the engine,
given a particular temperature. The engine is possessed with two detonation
sensors, and the moment the ECU detects any instance or this happening, it
will delay ignition, thus providing less energy release per fuel unit - read
power. The problem with this is that even if the ECU and sensors do a fine
job, there always needs to be detonation for the system to delay timing -
read the fewer the instances of detonation before the system acts the less
stress on the engine in the long term.
The Octane number is just a measure of how easily the fuel will self-ignite,
therefore, the higher this number, the better the fuel in terms of lower
detonation, which translates into lower consumption as the fuel is more
efficiently burned because it is not being burned at the wrong times.
JP Roberts
"Dave" <dave@nobody.com> escribió en el mensaje
news:6DXre.17424$m4.10249@newsfe3-gui.ntli.net...
>> Obviously the SuperPlus98, but if your car is not chipped, then the 95
>> will just do the same job at a cheaper price.
>>
>> The higher the Octane number, the better the engine will run in the
>> summer when it's hot.
>
> Why do you say obviously?
>
> Buying 98 for that engine is probably just going to empty his wallet
> faster. 163PS isn't a particularly high power output so it should be happy
> on good quality 95. AFAIK, the 1.8T from 180PS and up requires 98 for full
> power and better fuel consumption.
>
>
>
#25
Guest
Posts: n/a
Re: Gasoline
Obviously, because of less potential detonation problems. These are
exacerbated by hot temperatures as the intercoolers in the early 1.8T are
somewhat underengineered considering the demands of chipped cars. The net
result is hotter air intake, which means the fuel mixture shows a tendency
to self-ignite at the wrong times for the engine - read detonation
translating into less power per time unit.
The chips adjust the fuel-air-boost map to provide maximum efficiency, but
they also advance ignition timing to the maximum bearable by the engine,
given a particular temperature. The engine is possessed with two detonation
sensors, and the moment the ECU detects any instance or this happening, it
will delay ignition, thus providing less energy release per fuel unit - read
power. The problem with this is that even if the ECU and sensors do a fine
job, there always needs to be detonation for the system to delay timing -
read the fewer the instances of detonation before the system acts the less
stress on the engine in the long term.
The Octane number is just a measure of how easily the fuel will self-ignite,
therefore, the higher this number, the better the fuel in terms of lower
detonation, which translates into lower consumption as the fuel is more
efficiently burned because it is not being burned at the wrong times.
JP Roberts
"Dave" <dave@nobody.com> escribió en el mensaje
news:6DXre.17424$m4.10249@newsfe3-gui.ntli.net...
>> Obviously the SuperPlus98, but if your car is not chipped, then the 95
>> will just do the same job at a cheaper price.
>>
>> The higher the Octane number, the better the engine will run in the
>> summer when it's hot.
>
> Why do you say obviously?
>
> Buying 98 for that engine is probably just going to empty his wallet
> faster. 163PS isn't a particularly high power output so it should be happy
> on good quality 95. AFAIK, the 1.8T from 180PS and up requires 98 for full
> power and better fuel consumption.
>
>
>
exacerbated by hot temperatures as the intercoolers in the early 1.8T are
somewhat underengineered considering the demands of chipped cars. The net
result is hotter air intake, which means the fuel mixture shows a tendency
to self-ignite at the wrong times for the engine - read detonation
translating into less power per time unit.
The chips adjust the fuel-air-boost map to provide maximum efficiency, but
they also advance ignition timing to the maximum bearable by the engine,
given a particular temperature. The engine is possessed with two detonation
sensors, and the moment the ECU detects any instance or this happening, it
will delay ignition, thus providing less energy release per fuel unit - read
power. The problem with this is that even if the ECU and sensors do a fine
job, there always needs to be detonation for the system to delay timing -
read the fewer the instances of detonation before the system acts the less
stress on the engine in the long term.
The Octane number is just a measure of how easily the fuel will self-ignite,
therefore, the higher this number, the better the fuel in terms of lower
detonation, which translates into lower consumption as the fuel is more
efficiently burned because it is not being burned at the wrong times.
JP Roberts
"Dave" <dave@nobody.com> escribió en el mensaje
news:6DXre.17424$m4.10249@newsfe3-gui.ntli.net...
>> Obviously the SuperPlus98, but if your car is not chipped, then the 95
>> will just do the same job at a cheaper price.
>>
>> The higher the Octane number, the better the engine will run in the
>> summer when it's hot.
>
> Why do you say obviously?
>
> Buying 98 for that engine is probably just going to empty his wallet
> faster. 163PS isn't a particularly high power output so it should be happy
> on good quality 95. AFAIK, the 1.8T from 180PS and up requires 98 for full
> power and better fuel consumption.
>
>
>
#26
Guest
Posts: n/a
Re: Gasoline
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)
#27
Guest
Posts: n/a
Re: Gasoline
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)
#28
Guest
Posts: n/a
Re: Gasoline
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)
#29
Guest
Posts: n/a
Re: Gasoline
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)
#30
Guest
Posts: n/a
Re: Gasoline
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?
<gcmschemist@gmail.com>news:1119467145.503005.8427 0@o13g2000cwo.googlegroups.com...
>
>
> 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)
>
"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?
<gcmschemist@gmail.com>news:1119467145.503005.8427 0@o13g2000cwo.googlegroups.com...
>
>
> 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)
>