I did some feul consuption testing the last month or so. With al the changes to the car ext. I wanted to see how it effects what.
My first test was with and with out roof rack. 1 week with and one week without. Same route. Same driver same conditions. From my house to Micheals house. From centurion to jhb and back everyday and back to my house. The difference was 0.7km/l. I still havent put the roof rack back.
Then after the dyno on the way to gansbaai I tested some speed driving long distance. Car fully loaded at the rear with 4 people. Tyres 2.9bar. Heavy wind from kroonstad to Beaufort wes.
120km/h - 130km/h GPS speeds. Drove 1050km in 10h15min. With a breakfast and a lunch stop in between.
Got 6.5km/l.
The next day. Not as windy. Drove 100km/h-110km/h GPS speed.
Got 8.2km/l.
A week of driving along the coast and up to stellies for wine tastings. In total just over 650km's. No load, just 4 people.
Got 8.5km/l.
So yes. Wind resistance and rolling resistance make more diffs in consumption then weight I recon
After the dyno my car now makes 138Kw and 438nm.
I will post the results when I get hom. The 3inch freeflow with the right guy tuning the car made a wopping +- 31Kw and 120nm difference.