Shed me some light. I'm at the point where changing setting only make me slower.

use default.. lower your ride height..
for quali run..
rad 2
boost 1
brake map 3
20L fuel
1 hot tires

Stop fiddling with your setups. It's your driving skill that makes the biggest difference to your lap times.

...there are drivers who continually want to alter something. No matter what the designers or mechanics do it is never quite right, and I find that those drivers seldom, if ever, are vying for the front row on the starting grid; in fact, they are often not even the fastest man in the team.

-- Denis Jenkinson

not of my words but something i hold close over the years

no la...u can still hafta find a good basic setup first...the key is u gotta know where to stop tweaking n knows its ur driving that needs improving instead

Default seems to work nicely for me. Didnt even change the gear ratios.

Changed Values:
--------------------
Brake bias : 54/46
Pressure : 90%
Boost : 5
Rad : 5
Brake Map : 3
Brake ducts : 4
Front Ride Height : - 4 clicks from default
Rear Ride Height : -4 clicks from default

Quali on a single lap run : 1.37s
Race on full tank : 1.41s high and 1.42

Although I am not happy with my race pace yet

Still the same.