what time 0-100km?

[rodders]

Never really played with cars before but couldn't help myself with the scirocco.

Have no timing equip and never contemplated looking at dyno but have wondered what 0-100km times I could expect with my mods.

Have stock tyres on my my13.5 with as follows:

APR tune and upgraded with each mod addition
APR full turbo back exhaust
VWR CAI
VWR springs

Only ever used Shell 98 fuel.

Seems fast but I know they quote 6.2s for stock.

Any idea what it would be now?

[Deadpool]

I ran a 5.1 using a P3 Gauge today on a slight up hill with a bit of wheel spin and I've got a Stage 2+ GTI. You should be able to get into the 4's even without a Fuel Pump.

[JohnA]

havent tried mine either, but may do so when the p3 cars gauge arrives.

[Ryan_R]

Point a video camera at the speedo, do a run in (or two in both directions), then subtract the start time from the end time in your video player software.

Or install a Polar FIS unit. Or some other OBD bluetooth adapter and Android app.

I've done a 6.68 in my car once but really need to try it again to see if the intercooler swap makes any difference.

[Josh84]

Interesting thread! I managed a 4.8 second run with all the above mods the op had but also with the APR Hpfp, intercooler and the Quaife LSD. P3 gauges are generous on their time tracking though lol

[Deadpool]

Generous you say? Mine doesn't stop until I hit 110KM/h because that's when the P3 recognizes you've done 100. Well at least on mine anyway. Sitting at 110 on the speedo the P3 speed says 101.


Sent from my eyePhone in the year 3014.

[Josh84]

That's true. My p3 does the same thing too. I forgot about that. I guess the stock VW speedometers are always slightly off in accuracy

[AdamD]

That's true. My p3 does the same thing too. I forgot about that. I guess the stock VW speedometers are always slightly off in accuracy

The P3 reads the canbus speed figure, which is the accurate speed as the car perceives it. There is a significant error introduced to the MFD readout, and even more to the analogue speedo.

Further, there are a ton of factors which make these canbus-based accelerometers far from accurate, and really not worth quoting. (Consider canbus sample rate, tyre pressures and sizes, etc etc.) I've seen canbus figures compared to serious VBOX (industry standard GPS-based timing) equipment with almost a 20% discrepancy on the same 0-100 run. I have a cheaper - but still 10hz GPS based - GTech Pro SS Fanatic, and while there's some margin for error in it, at least it's in the ballpark.

[Ryan_R]

The models ones with the smallest wheels would be off by close to 10% but I'd expect the ones with larger wheels would only be off by a smaller margin (3-4 %)

[AdamD]

The models ones with the smallest wheels would be off by close to 10% but I'd expect the ones with larger wheels would only be off by a smaller margin (3-4 %)

Even if the wheel rotation were perfectly accurate (and that's never going to happen), there are several other reasons why these devices are inaccurate. For example, the canbus won't be providing road speed data to the measuring device over the canbus at anything like a rapid rate, or with a fine degree of precision - it may only register vehicle movement after the car has been rolling for half a second or more, and the next speed reported after 99km/h may be 102km/h.

If you want accuracy to within a second or so, there's no substitute for a GPS-based device with a 10Hz or faster sample rate.

[Ryan_R]

Or an advisory radar/laser speed check if they're nearby.
I know that 100kph (real) = 102kph (OBD) = 108kph (MFI) on my car and it's out by 8% at other speeds as well so I'm all good there. I've often travelled to/from Geelong with cruise control set to 110kph and never had an issue.