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80mph on 175 punter boards. possible? - Page 4

post #91 of 112
Quote:
Originally Posted by TomB
If you are going to jump in here with guns blazing, at least understand where some of us come from.
This is where I was coming from:
Quote:
Originally Posted by TomB
Endless,
In case you have problems with reading comprehension....
post #92 of 112
Quote:
Originally Posted by TomB
Just about everywhere huh? :
I don't think you comprehend just how quickly and easily a good sportbike achieves that kind of speed.
post #93 of 112
I think he had the "kph" button pushed. On my car, I can select the readout in miles or kilometers.

I got passed by a guy like that in CT last year. My comment to my wife and kid was, it's only a matter of time!

A few minutes later the highway came to a halt ... guess who bounced off the side of a car and went over the divider into the east bound lanes of the Interstate?
post #94 of 112
Quote:
Originally Posted by skiingman
I don't think you comprehend just how quickly and easily a good sportbike achieves that kind of speed.
I think I do. I owned 2 bikes around '85-'90 (a Honda 250cc motorcorss with 6 speeds that could reach about 145 kph and a Honda Saber V45 750cc that could reach about 230-240 kph, although I never drove it faster than 210 kph). But I did not drive it "just about everywhere" at 210 kph. I simply hate it when people exagerate for the effect.

Quote:
Originally Posted by Yuki
I think he had the "kph" button pushed.
I guarantee it. No street bike can reach 299 mph.
post #95 of 112
I question the validity of that bike video. Some of the footage seems awfully slow for the numbers on the speedo compared to the rate of passing scenery. The end seems to be much faster - and certainly, as Yuki said it's only a matter of time for this guy too. I can see (someone else) going fast, passing cars etc... but I think passing in both breakdown lanes, as well as between two vehicles borders on a deathwish. What's the average life expectancy of someone that buys one of those things, 5 years (probably a rumor I heard long ago, but a good one to spread)?

Anyway, to get back on topic and answer the question: No, it is not possible to do 80 mph on 175cm punter boards.
post #96 of 112
Quote:
Originally Posted by TomB
I think I do. I owned 2 bikes around '85-'90 (a Honda 250cc motorcorss with 6 speeds that could reach about 145 kph and a Honda Saber V45 750cc that could reach about 230-240 kph, although I never drove it faster than 210 kph)
240kph isn't fast for a bike. Or a car, for that matter.

In a world where 500whp Hayabusas aren't exaggerations or completely unique, there are plenty of bikes capable of going faster than the tires and roads allow.

This one keeps the front wheel off the ground to about 140mph:

http://videos.streetfire.net/search/...76210E5C8E.htm

This one pulls harder than just about anything, runs on pump gas, and looks sweet:

http://videos.streetfire.net/search/...B8DBC32E39.htm

A BONE STOCK R6 (600cc) from the local dealer does better than 160mph.

So yeah, I don't think you have a flipping clue.
post #97 of 112
Skiingman: 240kph isn't fast for a bike ... So yeah, I don't think you have a flipping clue.

You like feeling like the "big man" throwing around BS on the internet? The Hayabusa's top speed is 186 mph (299 kph). As of 2005 this is the imposed speed limit on production bikes. And Ghost's video better show a Hyabusa or a ZX12 or it is probably not a production bike.

So the Hayabusa does 0-60 in 3.5 seconds and some other "not so fast" bike does it in 4.5 seconds. You think that won't give you an idea of the acceleration capabilities of a bike?

Let me emphasize again: pointing to internet videos and bragging about speed limits does not impress me. I lived long enough to know better.
post #98 of 112
Quote:
Originally Posted by TomB
You like feeling like the "big man" throwing around BS on the internet? The Hayabusa's top speed is 186 mph (299 kph). As of 2005 this is the imposed speed limit on production bikes.
Did you watch the videos, tool?

Those 'busas are not stock. They have these little things called turbochargers attached to the exhaust manifolds. :

BONE STOCK Hayabusas run 9 second ETs. They trap at better than 230kph. With a couple simple mods, they'll trap at better than 240kph.

500hp 'busas are a completely different story. They run 7 second ETs with traps towards 300kph. This is faster than any production car at any price. From zero to 300kph in a quarter mile.....240kph not all that impressive or fast. How much faster the turbo bikes will go past 300kph is determined by gearing and rider sanity.

There aren't just a couple of these bikes around. There are hundreds, perhaps thousands.

My last turbocharged grocery getter would achieve 240kph in about 15 seconds. Rarely did a day go by where it didn't see 200kph several times. I drove it across the country once and averaged 160kph for more than ten hours, including fuel stops.

The flipping crown victorias the cops drive are the antithesis of "performance" and will still do 240kph.
post #99 of 112
Since it's raining and since I can't go skiing, why not add a few words.

I have to say that all the major manufacturers of sport bikes make a bike capable of doing what you saw in the video with a few mods. It's not that hard. As to the speed being accurate, it's not less accurate than the typical speedometer; check the speed of the bus when he slows down next to it about 120 kph. The highway is also not "just about anywhere" it looks a little like Sweden to me.

In all fairness to TomB, in truth I didn't ride it at 135 "almost" everywhere, just on the 400 series highways, and highway 7, and highway 9, and the other two-lane black top highways in southern Ontario, and the paved concession roads in southern Ontario. I didn't ride it on dirt roads at that speed. Also in the spirit of being even handed, my bike was a 750 Interceptor, not a Litre-bike, but it was still not at all the same as a Sabre (same displacement V4, but totally different ride and handling, different cam-profile, power-curve, exhaust, etcetera). My bike was geared more for acceleration than top end and would hit the rev. limiter at 225 kph, but only took about a dozen to 15 seconds and between a quarter and 3/8ths of a mile of road to do so from a dead stop. It also cornered quite well at top speed.
post #100 of 112
Quote:
Originally Posted by TomB
endless,

In case you have problems with reading comprehension, this thread is about GPS accuracy, not how fast one can ski under ideal conditions (long run, good pitch, long, straight(ish) skis).
Learn to read before trying to shoot someone down; doesn't make you look too smart.
post #101 of 112
skiingman,

Now you are babling, saying nothing new and desperately trying to show how amazing your riding skills are. Regardless, you don't have to ride a turbocharged Hyabusa to "comprehend" how quickly a sports bike can accelerate. Your air of superiority is getting a little old too. I am done here.
post #102 of 112
Quote:
Originally Posted by TomB
skiingman,

Now you are babling, saying nothing new and desperately trying to show how amazing your riding skills are. accelerate. Your air of superiority is getting a little old too. I am done here.
Wow. As others have noted, you need to learn how to read.

I do not, have not, and will not ride a sportbike...ever. Nor have I ever claimed or implied I would. Only pointed out how clueless you are.
post #103 of 112
Quote:
Originally Posted by Ghost
tief,
I don't know how steep or how long the hill in question is, but Kästle didn't only make girl's skis; they also made some SG skis that could double as DH boards . I own the 208-cm version, and have not been able to find their speed limit, even though I straight-lined every near-cliff I could find at Mt. Washinton BC (see for example of terrain http://community.webshots.com/photo/...18240536UwIzuS.)
I've skied there!
post #104 of 112
Quote:
Originally Posted by Atomicman
I've skied there!
Did they still have the little cliff roped off near the top of the Eagle Express lift? Did you ski it? How about the longer run about a 1/4 mile from there.
How fast do you reckon a guy could get a pair of 208s going down that, or taking the little cliff into west basin or starting just where the cliff begins to get vertical and straightlining as near as possible veering onto westerly(and (w)recklessly straigtlining that too)? Just curious; I didn't have a GPS.
http://www.mountwashington.ca/downlo...ail_Map_05.pdf

edit: It was a really stupid thing to do, and it is only by the grace of God that I didn't kill anyone in my youth. I would never do such stupid things again. I do not advise anyone to ski in such a reckless manner.
post #105 of 112
Speaking of Mt. Washingtons (obviously not this one in BC)....I've always wondered just how fast Toni Matt must have been going when he flew straight over Mt. Washington's Tuckerman headwall already going maybe 20, 30, 40 miles and hour and continued down the entire 1300 foot vertical face without a turn.
http://attitashcondo.tripod.com/id14.html
post #106 of 112
there are constant threads about speed and gps watches being inaccurate, but what happens when u are continually clocking a run about 10 times in a row, the the slowest max speed u get is 70 and the fastest is 82. There has to be truth in some of this, or they wouldnt have max speed on the watch.
post #107 of 112
Interesting thread. I tucked the top 1/2 of snowboard. Which was a black diamond going to a blue run with a nice flat. This was about ten years ago and it felt stupid fast. I was on 185 cm skis and they felt super short. Hitting a little bump I would soar over 10 feet and feel the end of the tail. I had a gps on me and it never registered over 40mph. I was in a full tuck but did not have a race suit. I know I was going faster than that but never could get it to register faster.

Yesterday I going down a Midwest hill 300 vertical feet. Was doing gs turns on my 180s and had it clock out at 43. Of course it's a different gps. It didn't feel stupid fast and it's probably around my average.

Either way do I believe 80 mph with 175s. Nope not on your life. Those skis would feel wicked short. Any mistake and you would find a crazy large yard sale. Watch a downhill those skis bend like noodles just going over a water injected course.
Edited by utahsaint - 3/15/15 at 7:13am
post #108 of 112

ZOMBIE THREAD ALERT

post #109 of 112

Epic CF Rules.

Don't post in Helmet,GPS or Fat vs Wide threads.

post #110 of 112
Thread Starter 

Had a few runs on holiday in February. The hard part is getting a clear run free from other people. I took the ski tracks app out as a bit of fun and give it a boost on a red run in Val D'isere managing 102kmph 1st effort. Finally managed to get a best of 115kmph (72mph) in what was slightly choppy conditions in Tignes on another red. Ideal runs seem to be those which have a long long steep section free from people sitting on their arse and with a nice gradual run out at the bottom. Skis 170 Heads Skier X Sandwich skis from 2004ish (old school). So in reply to my own thread I reckon 80mph on 175ish is certainly doable and on some proper skis with a smooth piste (WC SG or GS) must feel fairly stable.

 

App seemed quite accurate too when comparing it with car speedo when descending the mountain roads.

 

post #111 of 112

I don't think Ski Tracks is very accurate.  I've only used it a few times, but the top speeds don't seem to match what I think I am doing.  I've recorded 56mph on crowded narrow trails at Whiteface, and other days I've struggled to hit 45 on wide deserted trails with B fences.  The recorded slopes don't seem very reliable to me either,  I don't really believe any of it.

 

BK

post #112 of 112
Quote:
Originally Posted by Bode Klammer View Post
 

I don't think Ski Tracks is very accurate.  I've only used it a few times, but the top speeds don't seem to match what I think I am doing.  I've recorded 56mph on crowded narrow trails at Whiteface, and other days I've struggled to hit 45 on wide deserted trails with B fences.  The recorded slopes don't seem very reliable to me either,  I don't really believe any of it.

 

BK

 

The discussion in the "How fast do you ski?" thread starting might help inform this... starting with post 253 : http://www.epicski.com/t/30993/how-fast-do-you-ski/240#post_1852264

 

Summary answer : Except for the occasional obvious glitch, Ski Tracks appears to be pretty accurate to me; With some more data and checking needed.

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EpicSki › The Barking Bear Forums › On the Snow (Skiing Forums) › General Skiing Discussion › 80mph on 175 punter boards. possible?