rec.autos.simulators

GPL: problems braking straight

Bill Met

GPL: problems braking straight

by Bill Met » Tue, 06 Oct 1998 04:00:00

  Am I alone or is anyone else having problems braking in a straight line?
This seems to be more of a problem for me when using D. Arnao's setups,
but it still occurs with the defaults.
  I'm fine under power so I don't think it's my wheel.  However, more
often than not, the car pulls to one side or the other under heavy
braking.  Lower values on the "power-off" ramp angle?  Fewer clutches?
Help!
  BTW - My hands are NOT moving the wheel.  I've seriously tested it, it's
the car.

--
Bill Mette      | "A person is smart.  People are dumb."
MCSNet, Chicago |                        - K MiB

Mark E. Moone

GPL: problems braking straight

by Mark E. Moone » Wed, 07 Oct 1998 04:00:00

Lower power off ramp angle.
More clutches.
More front bias.

Also try the tinest smidgen of non-linear steering.
I set mine between the a and r in linear....

MM


>   Am I alone or is anyone else having problems braking in a straight line?
> This seems to be more of a problem for me when using D. Arnao's setups,
> but it still occurs with the defaults.
>   I'm fine under power so I don't think it's my wheel.  However, more
> often than not, the car pulls to one side or the other under heavy
> braking.  Lower values on the "power-off" ramp angle?  Fewer clutches?
> Help!
>   BTW - My hands are NOT moving the wheel.  I've seriously tested it, it's
> the car.

> --
> Bill Mette      | "A person is smart.  People are dumb."
> MCSNet, Chicago |                        - K MiB


LavaB

GPL: problems braking straight

by LavaB » Wed, 07 Oct 1998 04:00:00

Yes, I've noticed the same thing, Doug seems to have much more steering
precision than I do, which translates into the same braking looseness you're
experiencing. The way I've kind of "tightened" the braking on his setups so
far is to increase the rear rollbar slightly until the back end no longer
has such a tendency to come around, but the tradeoff is that the back
end breaks loose easier under power such as during fast power-on curves,
not a bad trade-off since I can use the throttle to control that. Note
that I am not an expert at setups, this is my experience as I learn to
tweak GPL setups and Doug's in particular. Maybe that is not the right
"textbook" answer but seems to work ok. Hope that helps.

Overall, big thanks to Doug Arnao and Alison Hine for making these setups
available for us, I'm learning a lot by comparing them to default setups.

--John


>  Am I alone or is anyone else having problems braking in a straight line?
>This seems to be more of a problem for me when using D. Arnao's setups,
>but it still occurs with the defaults.
>  I'm fine under power so I don't think it's my wheel.  However, more
>often than not, the car pulls to one side or the other under heavy
>braking.  Lower values on the "power-off" ramp angle?  Fewer clutches?
>Help!
>  BTW - My hands are NOT moving the wheel.  I've seriously tested it, it's
>the car.

>--
>Bill Mette      | "A person is smart.  People are dumb."
>MCSNet, Chicago |                        - K MiB


Rick Mille

GPL: problems braking straight

by Rick Mille » Wed, 07 Oct 1998 04:00:00

    I have the same problem with his setups.  Not saying that they are bad
setups, just I can't drive them (yet).  Even his soft Glen setup seems
somehow stiff or nervous.  Once I learn to drive, this might be a good
thing.

Rick Miller
Arrowhed12 on TEN
"Nascar head trying to learn to drive again with GPL (and loving it, even on
my P166 w/monster 1)"


>  Am I alone or is anyone else having problems braking in a straight line?
>This seems to be more of a problem for me when using D. Arnao's setups,
>but it still occurs with the defaults.
>  I'm fine under power so I don't think it's my wheel.  However, more
>often than not, the car pulls to one side or the other under heavy
>braking.  Lower values on the "power-off" ramp angle?  Fewer clutches?
>Help!
>  BTW - My hands are NOT moving the wheel.  I've seriously tested it, it's
>the car.

>--
>Bill Mette      | "A person is smart.  People are dumb."
>MCSNet, Chicago |                        - K MiB


Bill Met

GPL: problems braking straight

by Bill Met » Wed, 07 Oct 1998 04:00:00

  I kind soul emailed me (I'd give you credit, but I accidently hosed your
message) a suggestion.  Engine braking may be throwing the car sideways.
Try downshifting only after the engine RPM has dropped siginificantly.
After reading the words on the screen, I remembered that all of the
drivers in the included replays do this.  Get *** the binders, let the
revs drop way down, then quickly bang down to the desired gear.  I'll have
to give this a shot when I get home tonight.
  I haven't had this much fun being frustrated since I was learning to
skate for hockey.  Of course, I still can't do that too well either! :-0
  Thanks all for the suggestions.

-Bill



>    I have the same problem with his setups.  Not saying that they are bad
>setups, just I can't drive them (yet).  Even his soft Glen setup seems
>somehow stiff or nervous.  Once I learn to drive, this might be a good
>thing.


>>  Am I alone or is anyone else having problems braking in a straight line?
>>This seems to be more of a problem for me when using D. Arnao's setups,
>>but it still occurs with the defaults.

--
Bill Mette      | "A person is smart.  People are dumb."
MCSNet, Chicago |                        - K MiB

Doug Arna

GPL: problems braking straight

by Doug Arna » Wed, 07 Oct 1998 04:00:00


>   I kind soul emailed me (I'd give you credit, but I accidently hosed your
> message) a suggestion.  Engine braking may be throwing the car sideways.
> Try downshifting only after the engine RPM has dropped siginificantly.
> After reading the words on the screen, I remembered that all of the
> drivers in the included replays do this.  Get *** the binders, let the
> revs drop way down, then quickly bang down to the desired gear.  I'll have
> to give this a shot when I get home tonight.
>   I haven't had this much fun being frustrated since I was learning to
> skate for hockey.  Of course, I still can't do that too well either! :-0
>   Thanks all for the suggestions.

I would say this is a good bet Bill as not being able to stop straight is almost
always a problem with the rear wheels doing more braking than than intended.  My
brake bias settings are a tad more towards the rear than most and pretty
balanced if you don't induce any other drive-train related rear wheel braking.
As I brake, I am usually slightly blipping the throttle to match the rev's up to
avoid this drive train lag and let the brakes do their job as intended.  Alison
moves the brake bias more towards the front with every setup of mine she tries.
She trail brakes which I don't (carrying the brakes slighty on at the entrace to
a corner). She also considers them "loose" for her because of her style of
throttle application........

That being said, try down shifting less aggresively, run 30 ramp angle on the
decell side of the diff, and as a last resort, move the brake balance to 60%
front.

And lets thank Papyrus for even modelling this stuff :)

--Doug

Byron Forbe

GPL: problems braking straight

by Byron Forbe » Thu, 08 Oct 1998 04:00:00

Are your setups symmetrical Doug?



> >   I kind soul emailed me (I'd give you credit, but I accidently hosed your
> > message) a suggestion.  Engine braking may be throwing the car sideways.
> > Try downshifting only after the engine RPM has dropped siginificantly.
> > After reading the words on the screen, I remembered that all of the
> > drivers in the included replays do this.  Get *** the binders, let the
> > revs drop way down, then quickly bang down to the desired gear.  I'll have
> > to give this a shot when I get home tonight.
> >   I haven't had this much fun being frustrated since I was learning to
> > skate for hockey.  Of course, I still can't do that too well either! :-0
> >   Thanks all for the suggestions.

> I would say this is a good bet Bill as not being able to stop straight is almost
> always a problem with the rear wheels doing more braking than than intended.  My
> brake bias settings are a tad more towards the rear than most and pretty
> balanced if you don't induce any other drive-train related rear wheel braking.
> As I brake, I am usually slightly blipping the throttle to match the rev's up to
> avoid this drive train lag and let the brakes do their job as intended.  Alison
> moves the brake bias more towards the front with every setup of mine she tries.
> She trail brakes which I don't (carrying the brakes slighty on at the entrace to
> a corner). She also considers them "loose" for her because of her style of
> throttle application........

> That being said, try down shifting less aggresively, run 30 ramp angle on the
> decell side of the diff, and as a last resort, move the brake balance to 60%
> front.

> And lets thank Papyrus for even modelling this stuff :)

> --Doug

--
 Byron Forbes
 Captain of Team Lightning Bolt

 http://www.racesimcentral.net/~HOSHUMUNGUS

    and

 http://www.racesimcentral.net/~godsoe/bolt/home.htm

Doug Arna

GPL: problems braking straight

by Doug Arna » Thu, 08 Oct 1998 04:00:00


> Are your setups symmetrical Doug?

Except for Monza, Yes.

--Doug


1. GPL: Too skittish in straights

2. what road circuits in GPL have nice long straights?

3. GPL - brakes not locking (was GPL Online Carset Project)

4. Beetle Not Braking Straight!

5. The GPL Engine wasn't GPL's problem

6. '95 4.0 Straight v6, automatic transmission problem

7. 2002 Passat Straight Line Tracking Problem

8. Baffling Straight-8 Timing Problem

9. Cherokee Brake Problems-Brake Booster?

rec.autos.simulators is a usenet newsgroup formed in December, 1993. As this group was always unmoderated there may be some spam or off topic articles included. Some links do point back to racesimcentral.net as we could not validate the original address. Please report any pages that you believe warrant deletion from this archive (include the link in your email). RaceSimCentral.net is in no way responsible and does not endorse any of the content herein.