[gassy]

After having had the car for 4 years, and only just got a stop watch I decided to check some times. The first I've tried was 0-60, which came in at about 7.4 seconds. Do you guys think this is about right?

2.3t, 1991, Auto, 248bhp running on LPG

Keith

 

[markcanderson]

Sounds about correct...

 

[markcanderson]

I'd be more interested in 50 to 70 times in 4th and 5th gear.. (oops.. sorry you've an auto..) so 50 to 70 locked in 3...

 

[John Vaughan]

If you run at 50mph in 4th with the auto, you should be able to use the kickdown to third and start the watch at the same time. I will try this over the weekend if I can find a spot of straight road clear of the local "revenue enhancement forces"!!

 

[cdcarlsson]

I think you'll find that 50-70 increments and similar are measured with the vehicle 'passing through' this band accelerating already rather than starting to accelerate at the moment the clock is started.
Oh, and 7.4 sounds on the money, unless you're totally brutal in the way only a magazine road tester would be...
Nick.

 

[billj]

Just pipped me to it, Nick. Kicking down into 3rd at 50 and waiting for the turbo to spool up would likely result in a very disappointing time. The kickdown always seems to take a second (probably not, but feels like it).

 

[paulmanchester]

so performance times are done 'through' the speeds? I have tried 50-70 by accelerating from 50 to 70 at same time hitting stop watch. I asm doing that in around the 7 second mark.accelearting through the time should see me do it in around 6 secs. Which is pretty impressive.
What are people getting 30-70?(mph) Has anyone tried it?

 

[jeremyfrost]

Not tried that, but these are my third gear times with 3 people in the car:

mph secs
40-60 3.64
50-70 3.59
60-80 3.65

for comparison, 2001 911 Carrera 3rd gear:

40-60 3.6
50-70 3.4
60-80 3.4

 

[John Vaughan]

So if I kick it down around 45 and wait to start the watch until I roll through 50, this will be a more accurate test? If I start it at 30mph and kick down into 2nd it will pull all the way to about 60mph and 62-6300rpm before it shifts. Would this be a correct time as well? If I do it the latter way it is coming in under three seconds for 50-70! Doesn't seem right somehow.

 

[jeremyfrost]

May well be as my Aero 3rd gear goes to around 105mph. I guess that your car will be working in much shorter gear.

 

[cdcarlsson]

Yep, tried just about everything with the help of a little black box, Ooh err.

30-70 in third 7.68 secs, regrettably slower than Jez who even had myself and /john as ballast, and /john had just eaten! (Sorry /john couldn't stop myself. When are we going to meet again?)
Nick.

 

[billj]

I'd like to try that too. Let me know when you're next getting together. Should be interesting...

 

[Aero]

For fun I'm thinking of getting an accelerometer. One called an AC-22 seems to have some good functions (i.e. not just 0-60).

Anyone tried a performance meter?

 

[cdcarlsson]

Aero,
How do you think I measure mine to a hunderedth of a second?! Yep, with the AP22. Great for tuning as even if the figures aren't comparable with a rolling road they are undoubtedly accurate enough to be repeatable and of a very high resolution. If you want 'before' and 'after' figures it's great, and throws up the odd surprise, often the 'seat of the pants' feeling lies.
Bill,
I'll be bringing it to Wales in June, if the track is level enough or a road close by is, then it could be illumuniating.

 

[paulmanchester]

On my trip home from work I used a digital stopwatch to time myself.
50-70 mph (accelerating from ~45mph through 50 to 70).Best = 4.4 secs, worst =5.2 secs. Average of 4.8 secs. (6 runs)
30-70 mph = wheelspin!!! through 2nd into 3rd. Backed off and changed up very very early. Still got 7 secs for that. (Should see 5 secs in the dry!)
70mph-90mph in 5th was 6 secs (just 1 run)

I know this is way off topic now

, but how does that compare with other people?

 

[jeremyfrost]

Nick, we should get together soon, shouldn't we? I'll mail John and we'll sort out a mutual date.

 

[billj]

Originally posted by cdcarlsson:
[qb]Bill,
I'll be bringing it to Wales in June, if the track is level enough or a road close by is, then it could be illumuniating. [/qb][/b]

I'd suggest we try to find a nearby road, since we've had trouble zeroing the device at Goodwood in the short time we get while waiting for the green light. Also, I don't know about Anglesey, but it was hard to get a clean start at Goodwood with having to swerve out of the pit lane.

I also intend to try timing some acceleration runs shortly with the aid of a video. Just as with the accelerometer, a single run should yield a variety of timings.

 

[billj]

Bet it rains

 

[cdcarlsson]

That might level the playing field somewhat!

 

[billj]

The limited-slip-diff might help a bit, though...