I posted this on the simmods editing forum, but I figured there might
be someone here who might be able to help.
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Hi. I've been tuning the physics in the turbo mod to make the cars a
bit more convincing (upping the brake pressure, increasing the
downforce dropoff with yaw, etc) and I found a weird "bug" that I
can't solve.
F1 cars prior to 1989 did not have semi-automatic gearboxes, so I
decided to set the semi-automatic=1 line to semi-automatic=0. This
causes a problem I haven't seen in any other mods however. As long as
you fully lift off the throttle when shifting, everything is ok and
the car plods along as you would expect.
What's weird, and this causes problems if you try to blip the throttle
on downshifts actually, is that if you have the throttle down at all
when you shift it will refuse to engage the next gear. The indicator
says you've switched gears, but it will just sit there hammering the
rev limiter like you're in neutral unless you completely lift off and
put the gas back down. It's mostly an annoyance on downshifts, but
it's highly unrealistic on upshifts as well.
If anyone has any ideas on how to fix this I'd appreciate it. I tried
tweaking the high and low RPM range torque/horsepower, changing all of
the engine/clutch inertias, changing the rev limiters, etc and I can't
get it to properly speedshift or to allow realistic throttle blipping
on downshifts. I've also tried it with and without clutch assistance
turned on.
As a final unrelated note, I found a few lines that I highly recommend
people modify both in the turbo mod and in the original F1 cars if you
want a more convincing aero model:
FWLiftSideways=(0.5) // dropoff in downforce with yaw (0.0 = none, 1.0
= max)
RWLiftSideways=(0.5) // dropoff in downforce with yaw (0.0 = none, 1.0
= max)
DiffuserSideways=(0.5) // dropoff with yaw (0.0 = none, 1.0 = max)
Since wings on F1 cars don't generate downforce when the car isn't
pointing in the same direction it's traveling I prefer:
FWLiftSideways=(1.0) // dropoff in downforce with yaw (0.0 = none, 1.0
= max)
RWLiftSideways=(1.0) // dropoff in downforce with yaw (0.0 = none, 1.0
= max)
DiffuserSideways=(1.0) // dropoff with yaw (0.0 = none, 1.0 = max)
Now if you try and slide in a high speed turn the wings will stop
helping you and you'll be left with nothing but mechanical grip. In
other words, you'll be facing backwards in the sand trap if you aren't
incredibly lucky.
In the turbo mod if you want brakes that lock change the following
lines in all the car.hdv files:
BrakePressureRange=(0.30, 0.05, 11)
BrakePressureSetting=6
To:
BrakePressureRange=(2.00, 0.00, 1)
BrakePressureSetting=1
This will force a brake pressure setting of 200% which causes lockups
beginning at 135km/hr with low downforce. Personally I prefer 2.50 to
2.00 for this setting for that GPL-type brake feel.
Keep in mind that modifying your .hdv files will invalidate hotlaps
and multiplayer sessions.
Edit: Also, the brake change above isn't paricularly realistic but
it's a good quick fix until someone fixes the overall brake model.
Jason
