Quote:
Originally Posted by nikitopo
Are the 2 tunes on the same car and same fuel quality?
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No not same car
one stock on stock tune other with header and tune etc.
The point was to demonstrate that the stock car on the stock tune is not that good, especially on fuel of lower quality than whats found in Japan.
and that you can have a modded car with a tune, that runs way better than the stock tune.
but you can tune out the knock on a stock car on our fuels and get a car that runs better smoother and with slightly more power.
unfortunatly most people add a header when they get tune.
here is a car on same quality petrol as first car but on modded tune with header, again IAM now one, its not constantly getting significant knock correction like stock tune, doesnt run super rich high rpm like stock tune.
note on the stock tune log the 02 sensor is only scaled down to 12.1 afr that why the afr measures flat line on stock tune compared to the commanded afr. In the tuned cars the 02 sensor is rescaled to read correctly down to 10 afr.
http://www.datazap.me/u/steve99/jj-a...zoom=2469-2658
Stock cars run super rich (well 2012-2016, they sorted this out on the 2017 it runns about 12.3 afr not 10.7 like the older tunes stock). If you want to see the true afr on a stock tune car you need to use tailpipe 02 sensor.
below is stock car dyno with tailpipe afr measurement
