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Scenic Train Ride: Views & Experience

 
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Ernst S.
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Post08-11-2002, 13:38    Subject: Scenic Train Ride: Views & Experience Quote

Hello!

I added new features to the driving simulator and sent it to Rainer... I hope he has time to put it online soon.

First, let's address the 'AltOpa' issue with Gremlins.
Possible causes for driving image failure:

1.) The old valve amplifier is no longer performing as it should (the valve seats are damaged or something similar).
2.) The comparison TDI has more power than stated in its official specifications.
3.) Older cars often have more aerodynamic drag.
4.) The efficiency of the powertrain is lower in older cars.

So, my 90 horsepower gasoline engine from 1991 performs just as well as my father's 90 horsepower TDI... icon_smile.gif with a 20% weight advantage for the gasoline engine.
Purely based on feel, the gasoline engine felt stronger than it was when it was new.

Questions for Gremlin:
(I assume you've entered the correct km/h values for each RPM. I think that each gear of the old [vehicle] is geared longer (achieving a higher km/h).)

Where did you get the torque curve for the older model? I want to see the one for mine, but I can't find it online.

Best regards,
Certainly! Please provide the German text you would like me to translate into English. I will only provide the translation.


Translated on 03-08-2026, 10:46.
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Ernst S.
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Free account, no CAN development support

Post08-11-2002, 14:09    Subject: New Features: What's New? Quote

Okay, let's talk about the new features now:

Slope in percentage (%) ... with this, you can quickly drain the fuel tank of gasoline engines. At steeper inclines (around 10%), you can clearly see the advantage in top speed that a TDI engine provides.

Headwinds: For anyone who's interested.

And then, a few correction options were also included in the calculation.

The most important factor is increasing the aerodynamic drag to approximately 900-1200 N when towing a caravan. (You only need to add its weight to the vehicle's weight.)
For older cars with less aerodynamic designs, you could also enter around 400 or slightly more.

Furthermore, the rolling resistance can be increased or decreased by approximately 20% depending on the tires used or the tire pressure. Therefore, a correction factor of 0.8 should be applied for fuel-efficient tires to account for this difference in rolling resistance.

The other settings are not as important and should only be adjusted if you really know what you're doing. You also can't achieve major changes with them.

Perhaps with the efficiency of the powertrain. For example, in the 'AltOpa' version of the Gremlin, I would set it to 0.9 or something similar.

More or less performance must be taken into account when entering torque values. These are not normally constant throughout the entire range.
If one is so confident in having a 'constant additional torque,' one could also misuse the correction factor of the powertrain for that purpose.
So, for example, you can change a value to 1.3 to quickly simulate chip tuning. (But not every tuning method increases torque by a constant percentage across the RPM range; some might increase it more at certain RPMs.)

Best regards, Ernst.


Translated on 03-08-2026, 10:50.
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