Reviews DeDe's first performance test via GPS

[DeDe]

Hi guys,

Today I measured the performance of my brother's 2005 Suzuki Swift 1.3 on a traffic-free, 1.5 km-long concrete road.
My equipment was a 10Hz Qstarz GPS-receiver paired with the RaceChrono software on my laptop. I did several runs: acceleration from standstill up to the quarter mile (on both directions), flexibility in 4th and 5th gear and also a braking test.

It was hot today (33 Degrees C/91 Fahrenheit), but I'm pretty satisfied with the results.
After the tests I analyzed the runs with Racelogic PerformanceTools software.

Acceleration:
With only me onboard and minimal fuel I managed a 0-60mph time of 10,5 and reached 100 kph in 11,3 sec (factory's claim is 11,0 s, AutoBild did 11,2 s with full tank.)
My quarter mile time is 18,0 sec @ 126 kph (without rollout; 1-ft-rollout time is 0,4 sec).

Flexibility:
According to German magazines, the flexibility of the 92-hp engine is tragic. The best 80-120 kph time in 5th gear is 31,8 s (AutoBild). My average came up in 23,4 s - much faster, even if we consider my 30-40 kg advantage (less fuel).

Braking:
At panic braking the ABS works very harsh, probably because of the edgy surface of the track. With semi-hot brakes I managed 46,2 m (100-0 km/h), which is terrible. Probably the brakes will need new pads after these 8 years...

The results (two-way average times):

• 0-50 km/h: 3,7 s
• 0-80 km/h: 7,5 s
• 0-100 km/h: 11,3 s
• 0-120 km/h: 16,1 s
• 0-30mph: 3,5 s
• 0-60mph: 10,5 s
• 200 m: 11,6 s (101 km/h)
• 400 m: 17,9 s (126 km/h)
• Quarter mile: 18,0 s (126 km/h)
• Flexibility (60-100 km/h) in 4th gear: 12,7 s
• Flexibility (80-120 km/h) in 5th gear: 23,4 s
• Braking (100-0 km/h): 46,2 m (0,85 G average, 1,11 G peak)
• Speedo error: 94 km/h at indicated 100 km/h

 

[Giannis]

No photos of your measuring equipment?

 

[DeDe]

No photos of your measuring equipment?

I only took screenshots from my laptop, the GPS-receiver is just a little box, which connects to the laptop via Bluetooth.

It has only one switch (Off /1Hz/10Hz). As far as I know AMS and Sport Auto uses 12Hz GPS-receivers (2D datarecording), so I think mine is pretty accurate too.

 

[ACE]

Does your brother know what you are doing to his car?

 

[Giannis]

This software seems quite interesting. I'll check it out!

I did some measurements last year, too, but I only had an accelerometer for lab use

that was connected to the data recorder

So, I only had acceleration vs time graphs as output. Using Originlab's Origin 8 I got this (it's acceleration)

and this which is a handbrake turn

 

[DeDe]

Does your brother know what you are doing to his car?

Nope Actually I felt sorry for the little Suzy after the acceleration runs - I think I was too brutal to her clutch

 

[DeDe]

This software seems quite interesting. I'll check it out!

I did some measurements last year, too, but I only had an accelerometer for lab use
that was connected to the data recorder
So, I only had acceleration vs time graphs as output. Using Originlab's Origin 8 I got this (it's acceleration)
and this which is a handbrake turn

That's interesting - I can calculate your acceleration times from the G-forces, if you still have those data for every single 0,01 sec time periode.

 

[Giannis]

I think I still have the data, but the accelerometer worked at 100Hz. The files are quite big

 

[DeDe]

I think I still have the data, but the accelerometer worked at 100Hz. The files are quite big

100Hz is even better (if those G's are in an Excel-sheet of course)

Here is the datapanel (in Hungarian) with all of my measured data:

 

[DeDe]

I made two short videos with RaceChrono2avi software.

1. 0-129 km/h acceleration


2. Braking from 100 km/h

 

[DeDe]

Hi there!

Today I did another run with the Suzy, but this time with my camera onboard. It was even hotter today (38 Degrees C), so I only did one run. The surface where I launched the car was very grippy, and finally I was able to match the perfect wheelspin-traction point.
I tried to avoid hitting the limiter of 6800 rpm, so I did my upshifts 2-4 km/h below the maximum possible speeds.

Here's the video of my run:


And the acceleration-graph:

 

[Giannis]

I'm sure you can achieve a faster gearchange

Or didn't you want to stress the gearbox that much?

 

[DeDe]

I'm sure you can achieve a faster gearchange

Or didn't you want to stress the gearbox that much?

Yes, my 2nd to 3rd gearchange was pretty slow, but I don't think I could be faster with that particular gearbox.

We'll see, I will go back to my "runway" this autumn at better weather conditions - my goal is to go under 11 seconds, 10.99 would be perfect.

 

[Giannis]

I'm sure you can achieve a faster gearchange

Or didn't you want to stress the gearbox that much?

 

[DeDe]

Finally!
No farmers near the road, no bikers, no cars, no one - only me, the Suzy and 1,5 km-concrete road.
Perfect conditions for some 1000 m acceleration-tests.