Any ideas what am I doing wrong?
Thanks in advance,
Alex
(alexti)
85/30 is much more stable during braking... so you are not really doing
anything 'wrong', it's just harder to keep the car going the way you want it
with 60/45. You can prolly go faster (at least in theory) with 60/45 'cause
the car turns easier when no throttle is applied and you can apply the
throttle sooner without spinning the wheels (again, in theory). Personally I
find it hard to get close to my PB's even at 60/30, and way too hard to
drive (brake) at xx/45 or more...
BTW, I've read that in -67 they actually used 30/85...
- Igor -
They did use numbers like that. For this reason I've been using 45/85 for
about two years now. Took me a long time to get used to (about 6 weeks), but
I find I can lean on the car just as hard, if not harder than using 83/30.
Might be a different story if one uses left foot braking and trails heavily,
though. I RFB only and trail slightly.
To get back to Alex's question. Maybe these intermediate settings are too
much of the one and not enough of the other (I've never tried these myself).
I.e. the disadvantages of the one setting are not cancelled/superceded by
the advantages of the other. So go all the way Alex and give it a couple
weeks. 45/85 and two clutches is drivable in the Lotus and I have no trouble
beating my 85/30 PB's with it. Although I prefer to drive the other
chassises like Ferrari and Cooper (the Lotus doesn't suffer fools like me
gladly ;-)).
Jan.
=----
"Pay attention when I'm talking to you boy!" -Foghorn Leghorn.
>Any ideas what am I doing wrong?
>Thanks in advance,
>Alex
>(alexti)
I've read the following 2 posts also. I as going to reply
and say that as you change ramp-angles significantly
you also need to adjust your driving. If you could "record"
a script of controller movement at 85/30 and "play" it
back with 60/45/1 you'd be no quicker.
I read all the stuff about diff & ramp angles and
stuff. I looked at very detailed diagrams and
pictures etc and I do understand the concept of
the Limited Slip Diff but my question was "well what
does it FELL like, HOW can I drive with it and HOW
can it make me quicker.
My first outing in an F1 car with 45/85/1 setting
was a disaster and I never did get to grips with
it and thought it was totally unrealistic.
However, since driving FD cars I found that I
could ease my way into these.
I started with 60/45/1's and 60/60/1s and liked
the feeling they gave me, but they didn't make me
any faster.
Now I generally use 45/85/1 and I can more
readilly feel the effects AND use them.
It seems to me from a purely feel point of view that
reversing the more usual 85/45/ gives me two
very useful things.
The ability to provoke more readilly and effectively
Lift-Off Oversteer and Power-On Oversteer. I think
the single clutch helps this also but have not really
experimented.
The big problem with GPL and possibly 67 era
GP cars as a whole was very bad understeer.
An understeering car is generally safer but slower,
and I've heard that that is the reason the default setups
where created as they were.
I understand the 45/85/1 arrangement is more realistic
as to what was run at the time on the real GP cars
(although I've no idea where I picked this info up
from).
So, if you have a car that turns in better and more
decisively, you can generally brake a little later.
If you have a car that does not PUSH or understeer
under power you can get on the power a little earlier.
Both of these are very desirable and will result in
quicker lap times ASSUMING the driver is exploiting
these characteristics to the full.
If you have a car that is prone to severe lift-off
oversteer, you need to be more precise and gentle
with your transistion from gas to brake (essentially
avoid the on-off approach).
If you have a car that is going to oversteer under power
then you'd better be very, very precise with the throttle
application. Too much, your history, too little and you
are not exploiting that particular handling trait.
I'd try a track you know really well, one that you
can put in fairly consistent lap times at. Try going
45/60/1 and "play" with the car in the corners, easing
off the gas a little, pressing it a bit more, see what
effect it has on the car.
The Lo/Hi arrangement also can cause much more
instability under braking and you may need to keep a little
gas on as you brake (so you really need to be left-foot
braking to do that). If you don't want to do this, or can't
you could try adding some stability by setting the front
toe to quite a high -ve value (i.e. -3.5) and the rear to
a medium high +ve value (say +2.00). Under normal
circumstances this would effect the speed of the car
negatively, but this is not modelled in GPL.
The bottom line is, as Jan has said, that it will take time
to begin to exploit these type of setups.
Maxx
PS. There is a good section in GPL Race Engineer
which explains more about what the diff does and how
it theoretically effect the car. Also some more technical
stuff as GPL Foolishness (Nunnini's).
