Thanks Kurt and Tony for the points and results.
I was having a great time, not sure why though, not really a success story.
I decided to go with a bit orthodox gearbox for this. Changed final gear so that top speed was ~240kph, but shortened 4th gear one notch. Of course 5th gear became sort of overdrive by this choice and made Capri nicely reach the limiter in fourth on the infield section, but still reach the 5th gear limiter just before first corner braking point. For drafting gear box was awesome and so I always went close to BMW's, like Daz, overtaking me to get the 5th gear top speed immediately and stay there until I needed to stamp on brakes in first corner.
as a result I was over a second faster than Tony in infield section but lost only 0.6 seconds on banking and when I got drafted, the loss was there minimum.
So everything well planned and laid out for battling 3rd place in class? yep. Unfortunately the true race logic was something like this:
1. spin on corner with position and time loss.
2. hunt down next guy, usually Tony in BMW
3. Overtake the next guy
4. if spin count in race is less than 10, continue from step 1, otherwise continue from next step
5. make great tactical move and pit at the same time with Tony.
6. miss your pit box with just few inches
7. hunt down several backward-forward moves for the exact location of your pit box losing all the advantage you had by having smaller fuel tank and consumption than in BMW
8. leave pits with exactly same time and same time difference to Tony.
9. spin on corner.
10. hunt down the next guy
11. battle several corners with next guy without any touching nor problems and eventually gain a position.
12. if spin count in race is less than 20, continue from step 9, otherwise spin once more and continue to finish in 4th.
...For some reason I was still enjoying it. Not sure why though.
Normally I would been frustrated like no tomorrow.