Quote:
Originally Posted by Halim@HCP
Ok so, we look at different logging channels when we tune. Boost, timing, AFR and IAT are very important.
Octane affects timing, the higher the octane the higher ignition is possible resulting in higher power. We do not push the OTS maps to max, there is always a little room, why?
I've seen that the 93OCT can be good, but then you could have the perfect 93OCT but a very hot weather. There are too many variables that come into play, that's why we do NOT push the OTS maps to maximum. It's done in a way so it suits the majority of the cars, regardless if the octane is 92.7 or 93.x, hot or cold weather. Basically like OEM, just more power.
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Everyone seems to be afraid of the "unfulfilled power potential" of their car and is extremely happy to know you add more aggression to the OTS. But really they're trading power consistency for it.
From new logs, I don't really think US 93OCT is able to handle V5.7 on hot days. I even doubt Dinan turbo be enough to do it. Guys here must be much more excited than worried to hear that and cannot wait to try V5.7. Human nature.
Though I'm sure in Europe with better gas and cooler temp, V5.7 works very well.
To my standard, with western USA pump gas, V5.7 is over aggressive that it be best run with the STG2 turbo (bigger turbine and low manifold back pressure) which requires less octane for any given boost.
N55 is and has always been more of the little octane game, than anything else.