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View Poll Results: Fastest You've Been?
Holy grail of holy grails.... 200mph+ 1 1.15%
199-180mph 6 6.90%
179-160 18 20.69%
159-120 46 52.87%
119-90 12 13.79%
89-50 3 3.45%
49 > aka speed just isn't your thing 1 1.15%
Voters: 87. You may not vote on this poll

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Old 11-14-2013, 05:10 PM   #57
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Originally Posted by TheRipler View Post
Standard GPS doesn't have very good resolution when you approach 200mph (297 fps). With a standard sample rate of 1Hz, you're only getting about one sample every football field. There are 10Hz GPS units that help with this.
That doesn't matter - the GPS is still pretty accurate even at high speed. In fact, typically the GPS accuracy at high speed is much better than it is at low speed, since the signal to noise ratio is quite a bit better. Also, GPS doesn't simply take a sample, then take another sample, and then divide by the time between samples to get speed. The GPS is actually measuring the doppler shift of the signals from the satellites, and combining them with the position to estimate your velocity much more accurately than it could using the simple, obvious method.
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Old 11-14-2013, 05:15 PM   #58
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Old 11-14-2013, 06:24 PM   #59
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Originally Posted by TheRipler View Post
Standard GPS doesn't have very good resolution when you approach 200mph (297 fps). With a standard sample rate of 1Hz, you're only getting about one sample every football field. There are 10Hz GPS units that help with this.
Seems like Chrisl covered this somewhat. I don't have first-hand knowledge, but I would guess that GPS should be reasonably accurate when acceleration is low, and at/near maximum speed, acceleration *is* very low. Whether that means +/-2mph or +/-0.1mph accuracy, I dunno...

GPS aside, my point is that no one should post 182 or 183mph on any R6, no other info given, and expect anyone with any sense to just accept it. If they're going by their speedometers (and telling the truth!), actual speed was more likely in the 160-165mph range. 186mph on an '01 Hayabusa would be about 200mph indicated on the speedo on that bike. 186 indicated ~173 actual.

Same for cars, but generally less extreme. Motorcycle speedometers are *notoriously* optimistic, sometimes much more so percentagewise at higher speeds (and hence *ridiculously* so going by mph error).

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My personal best 198.1mph in a standing mile (avg over 132ft), and cracked 200 on the GPS prior to shutdown. So, been over 200, but still trying to reduce the amount of time it takes to get there.
That's, um, not bad for an econobox! I keed, I keed!

198.1mph car in the Texas Mile should be doing about 197.6 at 5148' and 198.6mph at 5280' according to my spreadsheet model. To gain another 1.4mph would take another ~200'. Did you really keep the throttle pinned 200' past the mile marker?

In any case, you were freaking close to 200mph

Last edited by ZDan; 11-14-2013 at 06:54 PM.
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Old 11-14-2013, 07:43 PM   #60
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An S1000RR has 943 bhp/tonne and maxes its speed in under 20 seconds.
Or in lamens terms I one way ticket to the pearly gates lol
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Old 11-14-2013, 08:12 PM   #61
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Old 11-14-2013, 08:33 PM   #62
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I'm afraid to ask what he drives now
Google "Craig Lieberman" and you'll see some of the ridiculous cars over the years. I had a pretty bomb childhood haha

Right now, he just has some new 7 series as a daily. He says he's working on something for the near future for a track/play car. No idea what though.
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Old 11-14-2013, 10:17 PM   #63
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What do our cars top out at from the factory?

According to one magazine, I forget which one, and a couple of youtube videos (one on the autobahn, I think), top speed is 142 mph, which would be a calculated 6282 rpm in 6th. It's drag limited, of course.

You mentioned top speed difference with a lightened car. I wonder if top speed would be affected at all since it's drag limited and a long ways from the calculated top speed of 167.28 mph @ 7400 in 6th.

My thought is that your lighter car would reach terminal velocity sooner, but it would still be limited to around 142 mph, depending on conditions of wind, grade, etc. You'll want to run it in both directions of course for an "honest" result.

I'd be interested in your results when you get around to it.
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Old 11-14-2013, 10:31 PM   #64
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I didn't know it was drag limited. We'll see though. I would've never taken the GPS along for the ride prior to reading this thread, but I will now. Even though it'll add like half of a pound.

FOR SCIENCE!!!
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Old 11-14-2013, 10:37 PM   #65
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i topped the 86 @ 139 on a dyno, but she was still stock then. once i get the new clutch in, gonna try it again, see how the power has effected it, and what the top speed of the stock transmission is
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Old 11-14-2013, 10:40 PM   #66
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I didn't know it was drag limited. We'll see though.
It cannot pull redline in 6th. The horsepower is insufficient to overcome the drag in 6th gear. Otherwise, it would do 167.28 mph @ 7400 rpm.

Perhaps my understanding of "drag limited" is askew. Help me out here, friend.
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Old 11-14-2013, 10:46 PM   #67
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and what the top speed of the stock transmission is
With OEM gearing and tires (or identical rolling circumference tires @ 844 revs/mi), the calculated top speed in 6th gear @ 7400 rpm = 167.28 mph.

My BRZ "floats" at 120 mph into a headwind. I don't like it.

167 mph?

Better you than me. I'll watch.
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Old 11-14-2013, 10:47 PM   #68
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With OEM gearing and tires (or identical rolling circumference tires @ 844 revs/mi), the calculated top speed in 6th gear @ 7400 rpm = 167.28 mph.

My BRZ "floats" at 120 mph into a headwind. I don't like it.

167 mph?

Better you than me. I'll watch.
i'm smarter than that. i do it on a dyno, i don't have to worry about traffic, bumps in the road, or head/side winds.
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Old 11-14-2013, 10:51 PM   #69
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i'm smarter than that. i do it on a dyno, i don't have to worry about traffic, bumps in the road, or head/side winds.
Heh.

And you're strapped down, too!

Dynos have me scratching my head, Goose. Can you pull redline in 6th on a dyno? If not, why not? There's no wind resistance to overcome...
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Old 11-14-2013, 10:51 PM   #70
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158 MPH in the 400WHP 400WTQ STi Cosworth built 21lb boost 2002 Speed wagon wrx impreza. Had much more to go.... But felt that was fast enough.....
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