a while back i was browsing the pistonheads and came across this article published on Thursday 31 August 2006.
http://www.petrolheads.co.uk/news/default.asp?storyId=14919
Those of us that are lucky enough to have a Tesco near them that sells 99 ron could try it for themselves and perhaps give us some feedback.
There are some interesting comments at the end, one stating that as you can tune for car to suit any given fuel (F1 style I guess), for some people the T99 will pay dividends. where as new cars can effectively 'remap' themselves according to fuel octane WOW
taken from the test;
This apparent gain in power is due to the ECU of the car’s ability to advance the ignition timing to take advantage of the extra power the higher octane offers. Looking at the air/fuel ratio on the charts does show that the higher octane fuel allows a more efficient burn creating more power.
The chart shows the car’s ECU when running on 95 Octane fuel enriches the fuel mixture (adds fuel) to compensate for the less efficient burn and to avoid early detonation. This extra fuel robs power as the air/fuel mix is less efficient. By changing this fuel to a higher octane the car is able to advance the ignition (essentially using less fuel at higher rpm’s) to create more power.
David
http://www.petrolheads.co.uk/news/default.asp?storyId=14919
Those of us that are lucky enough to have a Tesco near them that sells 99 ron could try it for themselves and perhaps give us some feedback.
There are some interesting comments at the end, one stating that as you can tune for car to suit any given fuel (F1 style I guess), for some people the T99 will pay dividends. where as new cars can effectively 'remap' themselves according to fuel octane WOW
taken from the test;
This apparent gain in power is due to the ECU of the car’s ability to advance the ignition timing to take advantage of the extra power the higher octane offers. Looking at the air/fuel ratio on the charts does show that the higher octane fuel allows a more efficient burn creating more power.
The chart shows the car’s ECU when running on 95 Octane fuel enriches the fuel mixture (adds fuel) to compensate for the less efficient burn and to avoid early detonation. This extra fuel robs power as the air/fuel mix is less efficient. By changing this fuel to a higher octane the car is able to advance the ignition (essentially using less fuel at higher rpm’s) to create more power.
David