!!! incoming bad english ;) :

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update from 1.1 to 1.11
better screen resolution support
now you can record 40 seconds 
you have maximal 60 seconds for a test 

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speedtests: 

0 - 100 km/h 
0 - 200 km/h 
1/4 Meile 
1/2 Meile 
1 Meile 

outputs: 
current time of race / taken time of race
distance in meters 
current speed  
max speed of the test
g-force * 
engine - rounds per minute
acceleration curve ( current - white ) 
acceleration curve ( last one - gray ) 
chart of last runs: seconds, distance, v-max, g-force, speedtes, car
best time + car of the chart 
( if the current run is bether it won't be taken ofer at same time, so you can check the difference )

now there is a folder with 5 txt files, in this files every race will be saved.
you can copy all and paste it to your excel program to sort it by your choise.

*g-force: 
its not possible for me to calculate the KW/PS but i'm able to calculate the g-force
off the acceleration. So you can compare the strange of the vehicles.

on the screenshots you can see a minus g-force, if have an accident and fly out of the car
the g-force calculation stops :).

keys: 
U: show / prepare for race / cancel
Z: choose the race type / stops the car too

 
if you want to change the top speed of cars in handling-files to a special value... look at:
http://www.gtainside.com/gta5/other/79539-geschwindigkeits-balupausen-handlingoptionen-mit-deutscher-beschreibung/
there you find an excel-chart with the right values for the top speed of your choise.
to get other acceleration, play with the values that i pointed.

the speed data you see in my screenshots are not from the original game settings ;)


<b>//-----Installation-----\\</b>

you need: 

http://www.dev-c.com/gtav/scripthookv/ 

and 

https://github.com/crosire/scripthookvdotnet/releases 

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put the speedtest.dll and the speedtests-folder in the scripts folder where gta is installed.
( the mod will not run if the speedtests-folder is not in your Grand Theft Auto V\scripts folder )

if ther are some problems reload the scripts by pressing insert in game ;)