Quote:
Originally Posted by msmiljanic
Quote:
Originally Posted by nioh_lbbm2
Guys it's important to note the limitations of your local fuel. The octane rating might not be very accurate depending on where you are which is why it is important to log your runs with each map.
"Stages" are a useless arbitrary term and in reality basically just refers to how much boost the map targets.
For example: even though you might have access to 93 oct gas in your area, it might not truly be 93 oct and therefore your car might respond better to the 91oct maps regardless of either stage 1 or stage 2. And even then perhaps
Mods play a part in your POTENTIAL to run higher boost (aka higher stages) but fuel is the ultimate limiting factor
Disclaimer: I am no expert but I like to read and gather as much information as I can to make informed decisions.
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In Texas, the dept of agriculture routinely spot checks fuel stations for octane levels, water, contaminants, distillation, vapor pressure, and ethanol. The octane level cannot be lower than the posted number. If found under the number, the TDA will place penalties and stop sales on the seller.
All that said in Texas, the posted octane is what you will get as a general rule of thumb. The detergent levels are a major difference where Shell has routinely tested the highest levels in their 93.
I do wonder if the map is possibly too aggressive relying on something slightly more than 93 since its an art not science. In other words, how does Halim make adjustments right up to 93 without causing a knock without extensive testing with exactly 93 octane fuel. If you are worried about knock damage(if that can happen in the n55), then it seems prudent to go with the 91 map or maybe the last release of the 93 that wasn't as aggressive.
Question for Halim - how do you know if your map has gone over the 93 threshold? Does it matter? |
Good points but I also want to add that our USA oct rating is AKI which is an average between two values: RON and MON
So possible variances between RON and MON value can still come to a "valid" AKI number but can affect your timings. Halim is in Denmark I believe so their fuel is RON
There is good 93 AKI fuel in the USA but since it varies so much from location to location taking logs to confirm your findings is the best thing to do