Racelogic Bruntingthorpe Data

[stephendell]

Is Mr Dell usually this slow at putting up the data or have I missed it somewhere?.

He can be sometimes but this time mainly down to moving home, lack of internet access and no phone line until 4th November

I have to write a report tonight for BigMVS's cars so will try and do it then.

Steve,

Good man, now get on with it. .

Trevor.

Is Mr Dell usually this slow at putting up the data or have I missed it somewhere?.

He can be sometimes but this time mainly down to moving home, lack of internet access and no phone line until 4th November

I have to write a report tonight for BigMVS's cars so will try and do it then.

excuses excuses

[stephendell]

Bruntingthorpe 5 Results - 30/07/09

NAME VEHICLE WEIGHT COLOUR 0-60* 0-100 VMAX VMAX Flying BHP 1/4 Mile**
DELL, Stephen A610 1420 Red 5.7 14.8 149.9 151.5 266 14.6@98.0
LAW, John GTA Turbo 1250 Red 7.5 17.0 145.6 NT 203 15.4@93.7
WARFIELD, Richard Spider 965 Yellow 7.0 21.1 127.6 NT NT 15.7@90.2
GIBBONS, James Megane R26 1353 Black 6.1 15.5 144.1 NT 267 14.9@97.5
SMITH, Tony GTA Turbo 1218 Black 5.1 13.0 145.9 153.1 284 13.9@103.9
PEARSON, Duncan Secma 560 Red 6.9 NT 95.5 NT NT 15.6@86.1
MILES, Dave GTA Turbo 1180 Red 6.2 19.8 146.0 150.2 216 15.8@88.2
THOMAS, Miles Spider 965 Blue 7.5 19.2 129.5 NT NT 16.0@91.4
KENNY, Jon Megane R26 1353 Black 7.2 18.9 143.1 NT NT 15.8@91.2


NT = Not Tested
* = True 0-60 (no rollout)
** = True 1/4 mile (no rollout)

Please note that we have measured true 0-60 and true 1/4 mile without rollout. Whilst it is convention to measure 0-60 without rollout 1/4 mile times are almost alwyas recorded with 1 foot roll out at drag strips. For the range of performance of the vehciles tested this would equate to a reduction of approximately 0.3 seconds off the stated 1/4 mile times.

We also tried something new on this occassion. We measured Vmax from standing and flying starts to see if there was any improvement.

Bruntingthorpe 6 Results - 22/10/09

NAME VEHICLE WEIGHT COLOUR 0-60* 0-100 VMAX BHP 1/4 Mile**
DELL, Stephen Spider 965 Blue 5.8 16.4 137.2 NT 14.7@95.2
LAW, Tony GTA Turbo 1250 Red 7.3 17.3 142.4 NT 15.3@93.5
CHAPMAN, Gavin Spider 965 Blue 5.9 16.9 129.3 174 14.6@94.0
FIELDHOUSE, Andy GTA Turbo 1180 Silver 8.5 23.0 132.9 177 16.3@86.7
SALAMA, Joe Clio Williams 1010 Yellow 8.2 22.4 126.4 NT 16.3@87.8
SKEDGE, Trevor GTA Atmo 1140 White 7.8 23.1 128.7 150 16.1@86.7
BEST, Simon Clio V6 1340 Silver 6.3 19.1 127.7 210 15.1@90.5
LAW, John GTA Turbo 1250 Red 7.4 18.8 141.5 NT 15.2@89.6
EYLES, Alan Clio Williams 1010 Yellow 7.4 19.8 127.2 NT 15.8@90.1
GARNER, Mark Clio V6 1340 Silver 6.4 17.8 134.4 NT 15.0@93.1

Also in the relevant Bruntingthorpe threads.

[stephendell]

Lies, Damned Lies & Statistics...

A Few Words About Rollout
The term "rollout" might not be familiar, but it comes from the drag strip. The arrangement of the timing beams for drag racing can be confusing, primarily because the 7-inch separation between the "pre-stage" and "stage" beams is not the source of rollout. The pre-stage beam, which has no effect on timing, is only there to help drivers creep up to the starting position. Rollout comes from the 1-foot separation (11.5 inches, actually) between the point where the leading edge of a front tire "rolls in" to the final staging beam — triggering the countdown to the green light that starts the race — and the point where the trailing edge of that tire "rolls out" of that same beam, the triggering event that starts the clock. A driver skilled at "shallow staging" can therefore get almost a free foot of untimed acceleration before the clock officially starts, effectively achieving a rolling-start velocity of 3-5 mph and shaving the 0.3 second it typically takes to cover that distance off his elapsed time (ET) in the process.

We believe the use of rollout for quarter-mile timed runs is appropriate, as this test is designed to represent an optimum drag strip run that a car owner can replicate at a drag strip. In the spirit of consistency, we also follow NHRA practice when calculating quarter-mile trap speed at the end of the run. So we publish the average speed over the final 66 feet of the quarter-mile run, even though our VBOX can tell us the instantaneous speed at the end of the 1,320-foot course, which is usually faster.

On the other hand, the use of rollout with 0-60 times is inappropriate in our view. For one, 0-60-mph acceleration is not a drag-racing convention. More important, it's called ZERO to 60 mph, not 3 or 4 mph to 60 mph, which is what you get when you apply rollout. While it is tempting to use rollout in order to make 0-60 acceleration look more impressive by 0.3 second, thereby hyping both the car's performance and the apparent skill of the test driver, we think it's cheating.

Nevertheless, some car magazines and some automobile manufacturers use rollout anyway — and fail to tell their customers. We've decided against this practice. We publish real 0-60 times instead. But in order to illuminate this issue and ensure we do justice to every car's real performance, we've begun publishing a clearly marked "with rollout" 0-60 time alongside the primary no-rollout 0-60 time so readers can see the effects of this bogus practice.

I think we need a top 10 so there is something to aim at in the future