Innovate Motorsports LogWorks 3 - Manual (Page 135)

LogWorks3_Manual_1.01.doc - 135 -
What is immediately noticeable is that the AFRs of session 3 are higher than those of session 1 in
the area below 7000 RPM, but lower above. Let’s see how that affects power and acceleration.
Acceleration can be determined by the slope of the RPM curve. The steeper the slope, the higher
the acceleration and therefore power (assuming other conditions like weight and wind are the
same).
In area 1, acceleration is slightly lower in session 3, while AFRs are higher than in session 1.
In area 2, both RPM slopes match. Therefore the AFR change had little effect.
In area 3, the RPM slope of session 3 is noticeably steeper. The engine made more power with
the leaner AFR.
In area 4, the RPM slope of session 3 is flatter. The engine made less power, but AFRs are richer
than in that area.
You can also see than when you compare the WOT rows in the charts of the session
Session 1
Session 3
You can see that the power curve can be improved by richening up the fields below ~4500 RPM
and leaned out in the fields at 7000 RPM and above.