TT (Mk1) Discussion Discussion forum for the Mk1 Audi TT Coupe & Roadster produced from 2000-2006

Pulled over the side of the freeway and did a 0 - 80 ish run to see how fast my 0-60 would be.

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Old Jun 2, 2006 | 12:01 PM
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Default Pulled over the side of the freeway and did a 0 - 80 ish run to see how fast my 0-60 would be.

It's rather disappointing to me actually. Maybe I'll try again later and hopefully there is not much traffic.

<img src="http://pictureposter.audiworld.com/9/tt0-80run.jpg">

Notice how load (red line) dictates the engine power. I was already accelerating in 1st (RPM on dark blue) when engine load was calculated as meeting spec load, so it probably told adjusted load to shut down. As you can see, even with my foot all the way down, the throttle (purple) shuts - but I am still accelerating.

Somewhere before I shifted 2nd to 3rd, you can see that engine load dropped dramatically. This is now the ECU trying to control boost (N75), until a new spec load was compared with at a new RPM (after the shift).

As RPM's build again in 3rd, load tells the ECU it's met, so it's time to shut down the turbo. Therefore the N75 starts to drop to about 60%.

As for my boost gauge, it's reading kg-cm2 (not bar) so that's about 14.22 psi per 1 kg-cm2. Nevertheless, it is showing slightly less that 1.5 bar during the run, and then holding around 1.2 (~17 psi). At the race track, it was holding at 1.5, even at 80+ degree weather.

My theory is, other than the conservative chip programming, is the adaptive driving nature of the ECU. During the race track, it was driven 100% all the time. Then we drove it over 3 hours home conservatively (freeway).
This morning was the 1st time I drove her since the race track and I pulled over to the side to do the run after stop and go traffic disappeared. I think it adapted to Grandma driving.

There's probably also temps that I have to monitor - intake and coolant to see how they affected this. I haven't replaced the coolant temp sensor yet. It might improve it when I put the green top on.
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Old Jun 2, 2006 | 12:10 PM
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Interesting data, did you run several blocks to get that?
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Old Jun 2, 2006 | 12:12 PM
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Yes, my favorite logs are 2,3 and 118 at the same time. This time I did 5, 3 and 118
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Old Jun 2, 2006 | 12:20 PM
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Last time I checked, 1370.72-1363.53 was 7.19 not 6.28 or am i missing something?
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Old Jun 2, 2006 | 12:25 PM
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Default Should be 1370.72 - 1364.43.

Actually it should be 6.29, but I just took the number from excel. Must be some rounding off.
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Old Jun 2, 2006 | 12:27 PM
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gotcha
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