rec.autos.simulators

T/A Physics: Car-performance a bit 'off.. Papy?

Ed Solhei

T/A Physics: Car-performance a bit 'off.. Papy?

by Ed Solhei » Wed, 20 Aug 2003 12:57:57

I dont know what stuff Papy used to get the settings for these cars...  but
that are a bit exaggerated for sure...

I just did a quick performance test:

0-100 km/h (60mph): 3 seconds!

and even more wacko:

0-200km/h (120mph): in *7* seconds!  - Thats close to a F1 car!

I actually did 0 to 147mph in a tad over 10seconds...  And that was from a
"okey" start - slight wheelspin in 1st and 2nd. and without a fully
optimized gearbox...

If they - Papy - have and time to do it - I would be if they could get these
figurs a bit closer to reality... i.e slow the cars down!

--
ed_

Pete

T/A Physics: Car-performance a bit 'off.. Papy?

by Pete » Wed, 20 Aug 2003 13:14:01

    Ed, first of all we need to know the weight of the vehicle and how
much HP the cars engine developes. If you can tell me these numbers
I have a power to weight calculator somewhere that will tell me what it
should be with optimal traction.
    If you want to get a rough idea go look at some of the drag racing
sites and you should be able to get some ball park figures.
    That being said the numbers look a bit quick.

    Pete


Gerald Moo

T/A Physics: Car-performance a bit 'off.. Papy?

by Gerald Moo » Wed, 20 Aug 2003 20:36:49



> > I dont know what stuff Papy used to get the settings for these cars...
>  but
> > that are a bit exaggerated for sure...


> Ed, first of all we need to know the weight of the vehicle and how
> much HP the cars engine developes. If you can tell me these numbers
> I have a power to weight calculator somewhere that will tell me what it
> should be with optimal traction.
>     If you want to get a rough idea go look at some of the drag racing
> sites and you should be able to get some ball park figures.
>     That being said the numbers look a bit quick.

I have read that T/A cars have about 100 less HP, but also weigh in
about 1000 pounds lighter, so figger something like 650HP and 2500
lbs?
Gerald Moo

T/A Physics: Car-performance a bit 'off.. Papy?

by Gerald Moo » Wed, 20 Aug 2003 20:42:45


>     If you want to get a rough idea go look at some of the drag racing
> sites and you should be able to get some ball park figures.
>     That being said the numbers look a bit quick.

>     Pete



> > I dont know what stuff Papy used to get the settings for these cars...
>  but
> > that are a bit exaggerated for sure...

> > I just did a quick performance test:

> > 0-100 km/h (60mph): 3 seconds!

> > and even more wacko:

> > 0-200km/h (120mph): in *7* seconds!  - Thats close to a F1 car!

> > I actually did 0 to 147mph in a tad over 10seconds...  And that was from a
> > "okey" start - slight wheelspin in 1st and 2nd. and without a fully
> > optimized gearbox...

According to the online calculator I found at
<http://www.web-cars.com/math/qtr_mile.html> for a 650HP car that
weighs 2500 lbs, this is about correct.  Actually, it came out to
149mph in 9.8 or so in the 1/4 mile.  <= my assumptions about power
and weight of T/A.
Matt Knutse

T/A Physics: Car-performance a bit 'off.. Papy?

by Matt Knutse » Wed, 20 Aug 2003 20:56:57


Still too quick. The HP/weight ratio of the trans am cars are quite similar
to the Norwegian Thunder Car series.
For comparison, our old C2 (Camel Lights) prototype had roughly 550hp with
1,3 bars of Turbo boost. A good bit over 600 with 2 bars. It weighed 640kg,
had huge fat slicks, very little aero resistance and did 0-120mph in about
8-9 secs with moderate boost. I'll guarantee you its faster than a Trans Am,
Just look at the ALMS prototypes vs the GTs..
We ever tried many standing starts though, too much mechanical sympathy for
that!

On the other hand, performance at least felt about right in N2003 T/A :)

/Matt

jason moy

T/A Physics: Car-performance a bit 'off.. Papy?

by jason moy » Wed, 20 Aug 2003 23:01:03

On Tue, 19 Aug 2003 05:57:57 +0200, "Ed Solheim"


>I dont know what stuff Papy used to get the settings for these cars...  but
>that are a bit exaggerated for sure...

I was under the impression that the "Papy Trans Am" cars were purely
fictional generic touring cars made for people to stick Trans Am or V8
Supercar or BTCC models on.

Jason

Edward

T/A Physics: Car-performance a bit 'off.. Papy?

by Edward » Thu, 21 Aug 2003 01:00:33


> On Tue, 19 Aug 2003 05:57:57 +0200, "Ed Solheim"

> >I dont know what stuff Papy used to get the settings for these cars...
but
> >that are a bit exaggerated for sure...

> I was under the impression that the "Papy Trans Am" cars were purely
> fictional generic touring cars made for people to stick Trans Am or V8
> Supercar or BTCC models on.

> Jason

You are right Jason, it has been emphasized that they are Trans Am "TYPE"
physics, not exact Trans Am physics.... generic

Edward

ymenar

T/A Physics: Car-performance a bit 'off.. Papy?

by ymenar » Thu, 21 Aug 2003 05:53:06


> I was under the impression that the "Papy Trans Am" cars were purely
> fictional generic touring cars made for people to stick Trans Am or V8
> Supercar or BTCC models on.

Exactly.  I would say that modeling a single, unique, "Trans-Am" car is
quite impossible considering the large difference between models in that
series (imho).  Going the fictional way, creating a realistic
yet-non-existing motorsports is a very good idea.  Live For Speed does that
quite good.

I don't even know if they are going to name it "Trans Am", if there is
licensing issues there.

--
-- Fran?ois Mnard <ymenard>
-- http://ymenard.cjb.net/
-- This announcement is brought to you by the Shimago-Dominguez
Corporation - helping America into the New World...

Haqsa

T/A Physics: Car-performance a bit 'off.. Papy?

by Haqsa » Thu, 21 Aug 2003 07:22:27

That explains a lot, and I think it is basically a good idea, but they still
need to fix the ground clearance in the setup or it won't even be a
realistic fictional car.


Ed Solhei

T/A Physics: Car-performance a bit 'off.. Papy?

by Ed Solhei » Thu, 21 Aug 2003 08:12:28

"jason moyer" said:

Fictional or not - do they have to be so damn unrealistic?

As for putting BTCC models on 'em - would'nt that look like a joke... a 2.0
litre 350bhp car that weigths over 1000kg - performing close to an F1!

Theory is one thing, but practice is another....  and you'll not find any
Trans-am typish car that will do 0-120mph in 7 seconds! (or any 650bhp
2000lbs un-supercharged stock-block car for that matter)

--
eD_

Ed Solhei

T/A Physics: Car-performance a bit 'off.. Papy?

by Ed Solhei » Thu, 21 Aug 2003 08:16:24

"ymenard" said:

Thats exactly what I'm trying to say here;  it NOT realistic!
The performance is way too good for such a type of car.  It would be like
racing a Mini on steroids (or a V8!) You might aswell fire up GTA or some
other unrealistic arcade-racer.

--
ed_

Ed Solhei

T/A Physics: Car-performance a bit 'off.. Papy?

by Ed Solhei » Thu, 21 Aug 2003 08:17:17



What would  you do with those numbers?
Change the physics?

--
eD_

Pete

T/A Physics: Car-performance a bit 'off.. Papy?

by Pete » Thu, 21 Aug 2003 11:34:02

    I would wait and see what the official Mod brings. I guess
you could go in and start playing with the ini files.
    I do know from talking with some of the hackers out there that these
numbers can be altered. And I know of one group that would probably
be interested. I guess we will just have to wait a bit and see what shakes
out once the patch is released.
    I don't think the power to weight is too far out of kilter. It appears
that
they have too much straight line traction. But whether you can alter that
and not effect the cornering traction I don't know.
    It looks like they left the HP alone and dropped the weight down
significantly.

    Pete




> What would  you do with those numbers?
> Change the physics?

> --
> eD_

Pete

T/A Physics: Car-performance a bit 'off.. Papy?

by Pete » Thu, 21 Aug 2003 11:41:21

    I watched the American Lemans series at Mosport on the weekend
and it appears the performance is very close to the LMP-675 class.
Or I think thats what its called. These cars eat the GTP cars and remind
me of the old Can-AM racers.

    Pete


Pete

T/A Physics: Car-performance a bit 'off.. Papy?

by Pete » Thu, 21 Aug 2003 11:42:47

    The LMP-675 class at Mosport scraped the track all the way around
on the weekend. There were running 1.5 to 2 inches of clearance.

    Pete



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