We brought the #11 car down to ICAR for a private test day last
week. We also brought along Andrew and Andy Wojteczko from Auto
Analyser in order to help tune the setup of the car, and to
provide some driver coaching. After a small issue with
registration (noone knew we were coming!), we get setup in the
paddock. It turned out that we were the only car testing that
day, and only one student in the ICAR Mustnag would occasionaly be
on track ... essentially, we had the entire track to ourselves. A
perfect test day, and even the weather cooperated.
As Andrew was dialing in a baseline setup on the suspension, a
problem with one of the shocks was found ... the low speed bump
knob was not stopping, and instead going round and round. We
had no idea what the setting was. A couple of calls to Moton,
some heavy lifting to stroke the damper, and the settings were
discovered (and marked!). We were ready to go, but not before
Andrew (with a straight face, no less) explained that what we
thought was the low speed bump knob, was actually the high speed
bump knob ... so much for twittling our knobs at Mosport and
thinking we were making good adjustments!
Andrew went out first to set a baseline. He right away got
a great time, we made some small adjustments to the car.
Amazingly, not much was required! Andrew was happy with the
setup. It was Eric's turn to get in the hot seat. A new
car, different gear box and diff ratios, no ABS ... this was a lot
to re-learn for a first session! Eric set some decent lap
times, and got used to the car. We made some more adjustments
to the car (Eric felt the car was a bit too tail happy ... unusual
for us!), and we discussed some of the driving. Improvements
were seen.
At lunch, we all went for a track walk. Always an
enlightening experience, this proved no different. There is
definitely more time to be gained on this track! It's time to
try it out. Finally, we are goetting somewhere! The combined
efforts of car setup and driver coaching has brought Eric's time to
within 1/2 second of Andrew's best, and the consitency is getting
better as well. At this point however, the tires we were
using were quickly nearing the end of their useful life ... which
meant that it was MY turn to have some fun ;-)
I got in the car, drove out on to the track, and promptly forgot
all about the shiftpoints ... boucing off the limiter, shifting
into 5th instead of 3rd ... boy this car really is different than
our old e36. The next lap was better, and my best (slower
than Eric's though!). After that, it was drift mania at ICAR,
with the rear end sideways at nearly every turn. This ended
is a dramatic high speed 360º, at which point I (and the tires)
were done. We swapped the dead tires out for some nearly dead
ones (sigh).
The last hour of the day was spent with Eric working on
consitency and line ... pushing his braking points deeper, and
trying new corner approaches. We felt the car is nearly there
setup wise, and while it can of course get better, it's not a
matter of simple adjustment (ie: time and money, and parts!).
We examined some data on the ride home and had a great dinner with
good discussion. All in all, a terrific and very productive
test day. Thanks to Andrew and Andy for coming down with us,
and we look forward to the next ICAR event on July 3/4!
Important things we learned:
- organized data capture is of utmost importance. If you
don't have data to refer to, you can't make educated changes
- capturing driver debrief sessions in a consitant manner will
help the crew fix the problems
- The Motec data aquisition systems is far (and I mean FAR)
supperior to the Racepak IQ3 system .. particularily the
software
- GPS track mapping and comparing lines between runs appears to
be useless with the IQ3. This is too bad since we could learn
a lot from this
- knowing which knobs to turn on your suspenion is a good thing
(duh).