1/4 mile list...

[jeremyc74]

Originally Posted by Jeff1962

I think when Magazines test cars it starts the time when the car starts to move, unlike wasting .5 seconds reaction time at a Dragstrip. 13.8 1/4 minus .5 sec reaction time is 13.3 1/4.

Reaction time isn't the issue. It isn't factored into the Elapsed Time at all, whether it's a magazine doing the testing or an individual in an actual race. The 1/4 mile times should be the same either way. The time is started when the front tires break the beam, at the start line, and stopped when they break the beam at the 1/4 mile mark.

What you are thinking about is "Roll out", which is closely related.

Where the magazine tests vary is in the 0-60 times. Some use "roll out" and some don't. The roll out comes from the fact that it takes a couple of milliseconds for the front tires to break the beam at a drag strip once it starts moving.

Traditionally in the US 0-60 times were calculated just like the 1/4 mile times, which always include roll out, because that's the way cars are timed at a drag strip.

Drag racing isn't as popular in Europe, so the 0-60 times from European magazines typically don't include roll-out, and are a few tenths slower.

[atr_hugo]

Very nice Jeremy, well presented explanation of how R/T is not factored into E/T.

Now, explain deep staging and its impact on rollout. ; -)

[jeremyc74]

Originally Posted by atr_hugo

Very nice Jeremy, well presented explanation of how R/T is not factored into E/T.

Now, explain deep staging and its impact on rollout. ; -)

Oh the worms that are crawling around now!

[knat]

Hi, I timed my 1/4 with a beltronics performance timer
calibrated @ 3475lbs @ sea level near where I live.

Everything on my 135i is stock and it is manual

60 ft- 1.95
330 ft - 5.57

1/4 13.18 @ 107.8 mph
When I launched i sliped the clutch a lil bit around 2500k/3000 rpm
and shifted @ redline 1-2 a lil bit slower than 2-3
and went till the end of 3rd gear without shifting the 4rd
hope you enjoy

(0-60 4.71)

[blklacker]

Wet/damp track conditions

[WAY]

I have never done 1/4. Been a track junkie but not 1/4 mile junkie. This sounds like fun, just like my 0-98kmh run on my signature. My car has RR catless downpipe and is chipped. I will have to take it for a 1/4 mile run one of these days!

[Bdh821]

13.65 @ 101.94 with a 2.1 60'
Best trap speed 104mph

Stock car 6 speed

[stefan]

Quarter-mile best results
DSC: 14.62
DCT: 14.43
All-off: 14.02

Had somewhat significant wheel spin with traction off, so I think I can improve that time.

Car is stock, 6sp. Elevation 3400ft.