0-100mph-0

[motion]

Mike - On the subject of speedo calibrations... every car I've ever owned, and bikes, too, have always had an optimistic speedo. IE, an indicated 80mph was actually around 73-74. I've confirmed this by looking at digital speedos in other cars at night, the mile markers, and the radar displays that the cops set up from time to time on the side of the road.

When driving my new Cab back from Florida last month, I had the cruise set on 87 in a 75 zone, thinking my actual speed was around 80-81. Well, I got tagged for doing 87 in Texas. I tried reasoning with the trooper about my logic, but eventually I shut up, fearing that I might be arrested and put in jail. He wasn't too amused.

[Emission]

There are so many variables involved, that the only way to get an accurate comparison is with the same driver, on the same "track", on the same day, with the same timing system.

I've heard of road test gear that uses optical sensors to read the pavement. The instruments start counting when you first roll and can track speed. They can also determine exact braking distances as they see the pavement "slow" as brakes are first applied. The "gray area" is between acceleration and braking in a 0-100-0 test. That could be a second lost!

[thabaer]

Originally posted by Early_S_Man
Wonder what Bill Cosby's twin-Paxton-supercharged 427 Cobra [600 hp] was capable of???

Dunno Warren, those hickies on the hood probably add a lot of drag. Having "Bob" in the passenger seat adds mass too!

I seem to recall the ZR1 was good at this game.

[Jack Olsen]

For the ordinary driver, you might see more consistent results from combining 0-100 acceleration times with 100-0 braking times, both of which can be accurately measured with an accelerometer. The driver's ability to know when to stop accelerating and hit the brakes has nothing to do with the car's ability to acclerate or stop, and it's the one part of this test where driver inconsistency will have the greatest impact.

[jstgermaine]

Originally posted by JackOlsen


How do they do it for the magazines?

R&T did it this way:

Accel
Same driver for every vehicle;standing, drop clutch launches and lift throttle shifts (except auto trans).

Decel
Full braking occurs only after 100MPH is registered on the radar gun strapped inside the vehicle. No left foot braking with a minimum of 10 trials for each car with the best time used as the final.

Several of the cars went beyond 100MPH due to the reactions of the driver Patrick Hong

The actual top speed hit prior to braking was:

MB E55 AMG-102.9
Audi RS 6-102.9
911 Turbo-103.0
Viper SRT 10-102.3
Ferrari 575M-103.2
MB SL55 AMG-103.6
Saleen S7-103.8
Lambo Murc-104.0

[Teutonics]

Originally posted by ZAMIRZ
that's ABSOLUTELY PATHETIC that the Saleen S7 "supercar" is that slow amongst those cars.

I read this article a few days ago, and if I remember correctly (up front disclaimer!), the S7 had two distinct disadvantages that hampered its overall time for this specific test: gearbox ratios and lack of ABS. The S7 required a shift to third at 99mph(!) to get above 100, and the Lambo's ABS hauled it down from speed more effectively. Optimize those two minor issues on the S7 (modify trans or diff gearing and add ABS), and it should've spanked the Lambo.

The issue with this kind of "narrow parameter" test is that certain cars will have specific unintended advantages, but in a broader overall test of abilities, that same car may be at the back of the pack sucking dust.

But......it's still a cool test.

[930fan]

Originally posted by Early_S_Man
Funny ... nobody seems to remember the original 0-100-0 tests touted by Carrol Shelby, et al, in the ads for the original Cobra's in the mid-'60s ... IIRC, about 14 sec flat ... for the 260 Cobra!

Wonder what Bill Cosby's twin-Paxton-supercharged 427 Cobra [600 hp] was capable of???

I think those figures quoted by Shelby are wildly optimistic. R&T tested one of the official Shelby 427s that were made in the 90's with the leftover chassis and it was nowhere near as fast as this. IIRC it did 0-100-0 in about 16 seconds or so. Maybe Shelby used slicks for the runs or maybe he just made the figure up...

[banjomike]

Well very very early this morning I did it. I had picked a stretch of road that was flat and straight with no on ramps. On the first attempt some traffic showed up way behind me just before I was going to get on the brakes so I aborted that run though my 0-100 time was about 15 seconds. I looped around and tried again, and this time no other cars showed up and my time was roughly 21.5 seconds, with the 0-100 at about 15.5. On the loop back I got in a slightly uphill 0-60 time of 6.5 seconds. I'm sure these times could be improved on. I just haven't practiced really hard starts in this car. I typically try to go easy on the old 915 in first gear.

Anyone else?

I timed these runs by recording with a digital camera in video mode. It was sitting on the seat so there is nothing to see but I extracted the sound. I'll upload a mp3 of it to:

http://www.benefield.net/zero-100-zero.mp3

[juan ruiz]

I had the opportunity to do this test with the people from "MAX" which is a magazine about european hot rods the test was done with a machine call RACE LOGIC is a sattelite system very very interesting this are the results.......of couse my car is set up for this type of thing


0-60 4.27 sec/0-100 7.87sec with Race Logic

[rick conrath]

Juan...how quickly can you get back down to "0"?
Rick
'78 930

[juan ruiz]

Juan...how quickly can you get back down to "0"?

I havent measure that ,I can make 2-3 good pulls and she will stop fine after that well.........................I need a little more road

[juan ruiz]

http://www.racelogic.co.uk/

[}{arlequin]

I think the magazine tests are still fairly inconsistent until everyone is on the same tires. The fact that some cars went to 102mph and some hit 103+ is not as important as the difference in rubber compounds on all these cars. Are the RS6 tires really in comparison to the Saleen's?

[plain fan]

They found it kind of scary that reving to 5k to get a clean take off with the turbo. Of course I wonder what could have been accomplished with the GT2, rear wheel drive and more power, not to mention PCCB...

[Emission]

[QUOTE]Originally posted by banjomike
[B]Well very very early this morning I did it.

QUOTE]

Pretty cool. I like how you used the video camera to time yourself.