rec.autos.simulators

N2: How to adjust setups for temperature?

Lis

N2: How to adjust setups for temperature?

by Lis » Tue, 01 Jul 1997 04:00:00

  I'm curious as to what to do to adjust d/l'ed setups for temperature
changes.  I see that most setups I have d/l'ed are used at 70 degrees; what
would I need to do to get them to run the same at 80 degrees?  I would think
that probably increasing tire pressures to keep them from getting too hot
would work, but it doesn't seem to work for me.  I've tried going the other
way, and the car just won't work.  If I leave them alone, I just run about 4-5
mph slower than what the setup says it'll run.
  I have a set up that says it'll run 164-65 mph at Darlington at 70 degrees.
But with the series mandating an 80 degrees temperature, I can only get about
160-61.
  Can anyone help with this problem?

                                                                       Jimmy

Jim Sokolof

N2: How to adjust setups for temperature?

by Jim Sokolof » Wed, 02 Jul 1997 04:00:00


>   I'm curious as to what to do to adjust d/l'ed setups for temperature
> changes.  I see that most setups I have d/l'ed are used at 70 degrees; what
> would I need to do to get them to run the same at 80 degrees?  I would think
> that probably increasing tire pressures to keep them from getting too hot
> would work, but it doesn't seem to work for me.  I've tried going the other
> way, and the car just won't work.  If I leave them alone, I just run about 4-5
> mph slower than what the setup says it'll run.
>   I have a set up that says it'll run 164-65 mph at Darlington at 70 degrees.
> But with the series mandating an 80 degrees temperature, I can only get about
> 160-61.
>   Can anyone help with this problem?

The first question is: how fast do YOU run with those setups at 70
degrees? I suspect that the problem is that you can't run the claimed
speeds at 70 degrees and therefore it's not really the temp that's
causing the problem. Different drivers do better with different setups;
just because someone can drive that setup to 164-165 doesn't mean that
you can... You might just need a different setup...

---Jim

David Spark

N2: How to adjust setups for temperature?

by David Spark » Wed, 02 Jul 1997 04:00:00



>>  I'm curious as to what to do to adjust d/l'ed setups for temperature
>>changes.  I see that most setups I have d/l'ed are used at 70 degrees; what
>>would I need to do to get them to run the same at 80 degrees?  I would think
>>that probably increasing tire pressures to keep them from getting too hot
>>would work, but it doesn't seem to work for me.  I've tried going the other
>>way, and the car just won't work.  If I leave them alone, I just run
about 4-5
>>mph slower than what the setup says it'll run.
>>  I have a set up that says it'll run 164-65 mph at Darlington at 70
degrees.
>>But with the series mandating an 80 degrees temperature, I can only get
about
>>160-61.
>>  Can anyone help with this problem?

>>                                                                       Jimmy

>Ahh.. Temperature in real life affects the car's handling. The
>"hotter" the temperature, the more in the likely the car will be
>"looser". The colder the temperature, the car will get "tighter"..

>So now think about what I just said. Set the car tighter for "hotter"
>temperature. And vice versa for colder temperatures.. Got it, Big J!!:
>))

One other thing: the engine generates less horsepower at higher
temperatures, due to lower air density. Lower air density means less
oxygen, so the crews have to lean out the fuel mixture. This is why
qualifying records on the big speedways are set in the spring when
temperatures are cooler.

Also, as a side note, I believe on the concrete tracks, the effect on
handling is reversed, i.e. hotter temperatures make the car tighter. I
doubt that this is simulated in N2, though.

Dave Sparks
IWCCCARS Project: http://www.theuspits.com/iwcccars
Late Night League: http://www.sequoia-dev.com/Hawaii/latenite.html
Hawaii Handle: davids


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