Unrealistic gear settings?

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Landbergaren

Landbergaren

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Landbergaren
Hello, when i buy a sportcar as say the Aston Martin - DB9 I like to run it around total unmodified. Doing so I seem to find this particular little question in my head. Is the gears correct? More then once I find it impossible to get use of the last gear unless I put the rounds up to MAXIMUM and going downhill! Not until then can I move up to topgear. I've only driven 🤬-cars IRL but i doubt this is how the manufacturer sets up their gears? "uhm our customers need an extra gear.. One modified for the people going 220 km/h downhill".

Let me hear your thoughts about this topic! :cheers:
 
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Usually that "extra gear" is there for fuel economy.

Most vehicles are happy at 70mph anywhere from 1500 to 3000rpm... Usually those happy at 3000rpm are less powerful vehicles with smaller motors... And yet you'd still only be doing 6000rpm at 140mph in that gear. Those that only do 1500? Try 280mph at 6000rpm if you had enough power to get there.
 
Now I must test the car in realistic traffic-speeds and see how well the gears dose! Since it struggled really much at shifting from 8000 rpm I just automatically came to the conclusion that this was not a gear for lower speeds.

Now lets see! A perfect opportunity to use the highway-map!

EDIT:
So I've taken my Aston Martin for another trip to run some tests. at 100 km/h it actually is capable of keeping the speed and even slowly advance a little bit. Even though it is at scary 1500 RPM. Funny though that when you shift to top gear at 260 km/h (6500 RPM sort of in the earlier gear) you will lose speed pretty fast.
 
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Ah how cute! So I guess what you are saying is that GT is point on!
We have a fuel-saver if we decide to race an endurance race in say about 140 km/h at most ^^.

Maybe I'll buy an sport gearbox after all.
 
Landbergaren
Hello, when i buy a sportcar as say the Aston Martin - DB9 I like to run it around total unmodified. Doing so I seem to find this particular little question in my head. Is the gears correct? More then once I find it impossible to get use of the last gear unless I put the rounds up to MAXIMUM and going downhill! Not until then can I move up to topgear. I've only driven ****-cars IRL but i doubt this is how the manufacturer sets up their gears? "uhm our customers need an extra gear.. One modified for the people going 220 km/h downhill".

Let me hear your thoughts about this topic! :cheers:
Click to expand...

Google is a wonderful thing

Found this
http://www.supercars.net/cars/3477.html

transmission 6-Speed Transaxle
gear ratios 3.15:1, 1.95:1, 1.44:1, 1.15:1, 0.94:1, 0.76:1
final drive 3.71:1
 
Yea sometimes supercars have an overdrive gear to pass emissions/get better fuel economy and to bypass some sort of "gas-guzzler" tax. Dodge vipers have always had 6 gears, but only the first 5 are "usable." I don't know exactly the gear ratio of the 6th gear, but it was ~.57
 
I've checked the final drive ratio on several cars and the GT5 numbers have agreed with the manufacturers reported numbers.
 
The best place to check the performance data (and test data) on quite a good collection of cars is on Road and Track Data Panel Archive: http://tiny.cc/syrfk

Unfortunately the DB9 data R&T had is based on the flappy paddle Automatic and I'm not sure if the car in the GT5 is semi-automatic or full manual (or if such option exists for the DB9). But on cars like the Ford GT and a few others, the gear ratio in GT5 is spot on.

BTW, the data Jack002 provided above is actually that of the DBS. For all I know it might be the same although the DBS as we know has more power than the DB9.
 
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