how fast have you gone???

[nynor]

damn.

[Dawgz83948]

Don't recommend that speed in an early car, the drivers side windshield trim blew off. It was pretty stable, if a bit twitchy) at that speed.

[Jeff Laurence]

~550 in a 747

[flash968]

lol - ok - about mach .95 in a T38 (they wouldn't let us crack the barrier)

[Schwarzeritter]

To be honest it depends.
If we are talking road or race car and on what circuit. " laughs " air craft >_< too.

On a motorcycle not much over 145-155 I'm factoring speedo error. In a road car north of 180mph, but I personally felt there was speedo error. Race machines 190+ normally.
It's also about how fast you get there combined with the duration you operate the vehicle at and the given vehicle. Winds, Surface, Temp etc doing a 145-165 thru a bend and back up to 180 is way different.

911's are probably the more out of the box fast. Ferrari's too. Some of the Japanese machines " the era " were quick. And achieved maximum operation speed.

One of the coolest cars at 155mph is the 99' Mcoupe.

Air Craft is not bad. It's different being the pilot vs passengers prop vs jet is different. Mostly how G's are placed upon the body vs sheer speed and getting used to rappid elevation changes.

[flash968]

yup

speedos are usually off, and generally read high - the average 968 for example reads 150 when you are only doing 139 - it's pretty close under 100 though

GPS is usually off at high speed too - the delay time to the satellite almost always causes high readings at the upper end - it's because of the calculation that is done, and the refresh rate - i've "fooled" my GPS into reading 10mph high at about 120 - it isn't too hard - i didn't feel it was safe to play around beyond that - too many thing moving too fast to keep fiddling

radar is about the only way to measure speed, unless you can sustain it for a while, which is why the bonneville runs are conducted the way they are - i use a radar gun for my local stuff, and at the track

kids, don't try this at home - high speed runs are DANGEROUS - tires are extremely critical at high speeds

[Dawgz83948]

Originally Posted by flash968

yup

speedos are usually off, and generally read high - the average 968 for example reads 150 when you are only doing 139 - it's pretty close under 100 though

GPS is usually off at high speed too - the delay time to the satellite almost always causes high readings at the upper end - it's because of the calculation that is done, and the refresh rate - i've "fooled" my GPS into reading 10mph high at about 120 - it isn't too hard - i didn't feel it was safe to play around beyond that - too many thing moving too fast to keep fiddling

radar is about the only way to measure speed, unless you can sustain it for a while, which is why the bonneville runs are conducted the way they are - i use a radar gun for my local stuff, and at the track

kids, don't try this at home - high speed runs are DANGEROUS - tires are extremely critical at high speeds

Thats why Y rated tires are so important. GPS can only be fooled if you're bursting up to a speed that is not held. If your car is kept at speed for any period of time over 10 seconds the gps reading is dead on. Radar is very hit and miss and can, depending on the contour of your car, take multiple reading to get an accurate reading. The only sure fire 100% accurate reading is lidar. Also accurate reading can be taken from your ECU (assuming you don't have larger tires than normal) since many car manufacturers (especially German ones) build in anywhere from 5-7 mph extra between the ECU and your speedo gauge. (My 05.5 Jetta TDI was 7mph difference between the ECU and Speedo)

[alfadoc]

141 mph (indicated), in an Alfa Romeo 164S, for about a 3 mile stretch of RT 29N in Charlottesville Va. I was late for work.

Have run around 200 KPH for about an hour or so on the A4, between Verona and Milan. I was late for a plane.

[cockerpunk]

152 indicated in my 951. the speedo is off in the car though, i estiamte i was only going 145ish based on linear extrapolation of error.

[dangerous]

Originally Posted by flash968

yup
kids, don't try this at home - high speed runs are DANGEROUS - tires are extremely critical at high speeds

Huh? What? I was napping....somebody call my name???

[lane912]

105 in my 912.....
stock 912-

[seafeye]

You're all under arrest.................

[v2rocket_aka944]

Originally Posted by Dawgz83948

Anyone else know that the foam spoilers on a 944 tend to vibrate and deform in the middle at over 160? Now I know why the factory racers used a rigid spoiler.

now theres something i never expected to learn.

[stuntman703]

About 105 one time after going the wrong way for about 20 mins, I had to make time up.

[CatsEyes]

About 190kph on a freeway here in outer Sydney, in my other car, for a very short space of time. Ran out of patience with a young man in a V8 who was giving me grief.

Also provided an excuse to see if the Japanese-car-companies'-convention speed-limiter actually worked. (Supposed to kick in at 180.) Answer: sort of.

No opportunity to drive safely very fast in the 944 so far. And I like my license.

[thekidd]

Topped out in my my 87 924s- speedo said 136-7-8 or so, and about the same in my current 84 944. Only did that speed for a mile or so on highways.

[atdc94]

went about 125 in my g6. and about 130 in my 951. and that was in 4th gear at 4300 rpms

[nynor]

Originally Posted by atdc94

went about 125 in my g6. and about 130 in my 951. and that was in 4th gear at 4300 rpms

really? i think my 951 tops out in 4th gear at about 125. not that, you know, i've done that....

[atdc94]

Mine has a few mods on it. I know its the Turbo S model. It has a cat by pass, and it has a ecu guru performance chip in it.

[nynor]

none of that would affect the gearing. just saying. perhaps what i wrote wasn't clear.... my car is redlining at about 125-130 in fourth gear. i still have all of fifth gear. 1BAR of boost, half the interior removed, chipped, etc., here.