What is FATS?
FATS is time in 3rd gear that takes for and S4 b5 to accelerate from 4200 -6500rpm
This is specific to S4 b5 98-2002 01 transmission with 3rd gear ratio 1.231
Any other gear ratios do not translate into correct FATS.
As its popular to swich to RS4 gearbox which has 7% shorter 3rd gear, therefor getting faster FATS and bigger bragging rights?
To put this into perspectiv.
S4 with std k03 turbos most often tend to be in 4-5 sec range
S4 with pjk04 3-4 sec Fats
S4 with RS6 turbos 2.5 – 3 sec.
Note – it takes apx 500whp+ or 600bhp to achive 2.5sec. This is generally a very fast street cars.
Bigger turbo cars get somewhere between 2 – 2.5sec FATS.
Note – it takes apx 650-700+ whp to achive this.
These are extremelly fast cars, super car level.
###Under 2sec
Note – This is very rare. There has been couple through all these years.
NOTE – FATS must be done on a flat road and full weight car ( apx 1700kg for en S4).
RS4s weight at 1800kg+
FATS is measured with Me7 logger only!
This is not sciantific but its very good pointer of a cars torque range.
Not most Power car has the best FATS – but those that has broadest TQ range.
FATS are not meassured from speed sensor, but from flywheel sensorn.
Enjoy it.
FATS car examples
Full weight RS4 Built 2.8L engine
TTE780
TDI tranny – same 3rd gear as S4
E78 fuel
Fats – 1.87 sec blank
click on the image for full-size
Full weight RS4
AZR with rods
TTE780
E78
RS4 tranny
Fats – 1.84
click on the image for full-size
Full weight RS4
AZR with rods
E78
TTE780
S4 tranny
Fats – 2.13
click on the image for full-size
S4sedan
pjk04
Stock AZR
S4 tranny
E78
Fats – 2.75
click on the image for full-size
Full weight RS4
OERS6 turbos
RS4 tranny
E85
Software Extreme
Fats – 2.28
click on the image for full-size
Dyno – 700wnm/577 whp
click on the image for full-size
S4 wagon with full RS widebody
S4 tranny
Oe RS6 turbos
E85
FATs – 2.54
click on the image for full-size
S4 Wagon- 98
PJk04
Petrol 98
2 person in car
FATs – 3.08
click on the image for full-size
RS4 wagon
3L stroker
RS4 tranny
Loba 750 turbos
Petrol 98
FATs – 2.14
click on the image for full-size
RS4 wagon
3L Stroker (2 ppl in car)
RS4 Tranny
Loba 600
Petrol 98
FATs – 2.3
click on the image for full-size
S4 wagon
3L Stroker (2 ppl in car)
RS4 B7 Tranny
TTE880
Petrol 98
FATs 1.58
RS4 Wagon
RS4 tranny (2ppl in car)
Custom RS6 – K16 turbos
Pump petrol 99
FATs 2.56