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[Webby the Bear]

Hi guys,

DISCLAIMER: I know the 0-60 test has a lot of variables like imperceptible gradients, wind strength and direction, temperature, stopwatch/acceleration being synchronised spot on etc etc however I feel I'm getting close to what the manufacturers say and going to be honest I love doing this test when I'm bored

Anyway, 0-60 in my car should be 9.5s.

I did it the other day and got an awesome 9.3s.

However, did it two days ago and got 10.5s. However, there was me, the wife and 2 full size spare wheels in the boot (1 is my spare, the other was one I 'borrowed' from college to have the tyre off asit had 7mm and mine had...well... something worse  )

Dropped the wife off and went to do the test by myself (still with 2 full sized spares in the boot) managed bang on 10s)

So, to recap:
Me on my own with just 1 spare - 9.3
Me, wifey and two spare wheels - 10.5
Me, no wifey and two spare wheels - 10.0

Is this expected?

Also, I was chatting to my tutor the other day about EGR. I thought the exhaust gas going back in to the inlet (when EGR valve is opened) was actually more combustable. However he told me it's ''inert'' thus has no reaction to combustion. Therefore that exhaust gas going back in is essentially ''dead'' and there's going to be less power. I'm assuming there's no way of finding out when the EGR valve is activated but if it was open when I was doing my 0-60 test then that would also affect it???

Your thoughts to all the above?

[05omegav6]

Weight makes a difference... the handbook might tell you how the GM figure is reached, ie fuel load/number of people etc. A tank of fuel weighs about 67kgs for example. GM might calculate the performance/economy figures at maximum gross vehicle weight, but equally might be a 40kg test driver and about 3 litres of fuel and nowt else

[Webby the Bear]

I know test drivers are meant to be skinny but 40kg.... I'm surprised he'd have enough strength to open the doors 

Only kidding Al but I get the sentiment. Thinking about it I suppose without knowing exactly how those figures have been calculated (i.e. passengers in car, fuel load, tyre pressures, misc. weight etc) it's going to be impossible to compare real world times to manufacturers' times.

I suppose though that only a second over what they said with half a tank, two passengers and two full sized spares is pretty good? What do you think?

[05omegav6]

As a 0-56 time, not bad

[Webby the Bear]

Huh? lol that was to 60

[Webby the Bear]

Found this with soooo many variables too...

http://en.wikipedia.org/wiki/0_to_60_mph

[Webby the Bear]

Ps, anyone think I may beright on the EGR thing?

[Webby the Bear]

Just to add... I've read a thread on this very site where kick down is sometimes very powerful and some other times its just a gradual push (still drops a gear and red lines but power is sometimes applied faster and harder and other times not). The person who's thread it was blanked off EGR and had constant good/hard power from then on.

This would explain everything......

[martin42]

Go to santa pod when they do rwyb and you will get a 0-60 and also quarter of mile time.

[05omegav6]

Said it before and shall say it again...

What your speedo says and what the car is doing are two different numbers

[05omegav6]

Go to santa pod when they do rwyb and you will get a 0-60 and also quarter of mile time.

As long as Webby keeps his boot in

[Webby the Bear]

Said it before and shall say it again...

What your speedo says and what the car is doing are two different numbers

Is the speedo always wrong then?

[Webby the Bear]

Go to santa pod when they do rwyb and you will get a 0-60 and also quarter of mile time.

Would love to. But if I'm not comparing like for like (my set up vs GMs set up) then it's going to be pointless.

Al, you said that the handbook may say the 0-60 testing conditions? Which handbook exactly?

Does anyone havethis info? Then I can do a proper test 

Would also be interesting to hear some 0-60 times done by OOFers and how they set up i.e. no. of passengers, extra weight added, any weight removed (thinking seats for example) fuel load etc etc

[Webby the Bear]

Ps...

I've been putting it in 'D' and in sports mode. Should I perhaps do it in '2' andin sports mode?

[omega3000]

Ps...

I've been putting it in 'D' and in sports mode. Should I perhaps do it in '2' andin sports mode?

Aye you will notice the difference , mite need a change of pants if you floor it  Oh and keep an eye on the fuel gauge