Rotary Junkie
Premium
- 9,810
- Canton, MI
- RJs_RX-7
Nah, multiply by .62 to get it exact.
Three Hundred Miles Per Hour
- Thread starter Dark Elite
- 7,722 comments
- 654,290 views
- 971
- Sunny Devon
- 2,571
The most accurate real-world conversion you can reasonably expect to use is that 1 mile equals 1.609344 kilometres.speedemon08
However. The rules state that all speeds must be verified in miles per hour for a very good reason - we do not know the exact conversion rate that Polyphony have programmed for speeds. The useful data Car-less provides sheds some light on the situation, although I am still not entirely happy with taking speeds in kilometres per hour and then simply converting them. Who knows, with all the odd glitches GT4 has in it, perhaps the speed is calculated differently to distance, or - more likely - speed is calculated more accurately for Max Speed Test runs. This means that, despite the knowledge of the overall distance conversion rates, we still can't accept proof in kilometres per hour for the Leaderboard: as those who've been around a bit will tell you, in a close speed battle a couple of hundredths can make the difference between being top and not.
Apart from that... Interestingly, gtfan007, you're already on the database, but not with a speed registered. Why this should be, I have no idea, but as this is your first speed (not bad either), welcome to the Club
And that is the five hundredth entry on the Leaderboard
Leaderboard Updated
DE
- 14
w00t i managed 327.67 in the minolta toyota 88c-v watsit thing (oh why didnt you just call it the toyota LM or something?)
now all i need to do is work out how to get a screenshot from the replay and then how to get that onto my PC and THEN how to upload it to the GTP forums...
anyone got any ideas?
now all i need to do is work out how to get a screenshot from the replay and then how to get that onto my PC and THEN how to upload it to the GTP forums...
anyone got any ideas?
- 14
the best conversion is:
km/h-mph: multiply by 0.6214
mph-km'h: divide by 0.6214
for example, 250km/h=155.35mph and just to check, 155.35/0.6214=250. so there you go, the proper formula.👍
this means that to be a fully-fledged member of club 300 you need to have a speed of at least 482.78km/h.
therefore, Street Racer 77 just scrapes in with 300.7576mph. congrats!
hope this helps guys and good luck reaching that magic number
- 971
- Sunny Devon
With the glitch where the Odometer mileage does not equal your stat screen mileage, you are right to be wary of converting speeds. The data I supplied came from Odometer readings, but over 46 laps of the Test track even these differ from car to car by as much as 15 meters per lap - and thats with B-spec Bob driving.
Although I was happy to use these conversions for my purposes - measuring 300 miles to within 0.1%, there is no way they could be considered accurate enough for measuring 300mph to within 0.01%. Useful for ballpark conversions though.
- 2,571
Did you, er, read my post at #6903?gt4 addict
It supplies not only a more accurate conversion method but also a very good reason for not using it on GT4-output speeds.
Thanks for that, Car-less, that little issue is news to me too - makes me feel somewhat more comfortable with my decision though
DE
- 1,164
- gtp_speedemon08
the conversion rate is almost exacly the formula i said, as it works on the mph to kmh conversion, but is slightly out on the kmh to mph conversion.
- 14
Did you, er, read my post at #6903?
It supplies not only a more accurate conversion method but also a very good reason for not using it on GT4-output speeds.
Thanks for that, Car-less, that little issue is news to me too - makes me feel somewhat more comfortable with my decision though
DE
ooooooooops sorry
- 2,571
How can you possibly claim that your conversion rate is 'almost exactly' right, when you can't even get it to work both ways? I have to wonder why you don't simply divide by a constant to go one way, and then multiply by it to go the other.speedemon08the conversion rate is almost exacly the formula i said, as it works on the mph to kmh conversion, but is slightly out on the kmh to mph conversion.
The fact of the matter is, however accurately we know the ratio of miles to kilometres - far more accurately than the figures you suggested - we still have no definite idea as to what conversion GT4 uses, so we cannot convert speeds from kilometres to miles per hour for Leaderboard use.
Yes, patience is wearing a little thin on this one.
DE
mafia_boy
(Banned)
- 5,570
- GTP_Mafiaboy
I think what we need to do is have someone do a 300+ run in any car, then convert to km/h by changing the units marker in options. Then do vice versa by doing the run in km/h then converting to mph. If there is any discrepency it will be found out this way by this method in conjunction with using the calculation.
For example, I ran a 3000GT on max speed today. Got a km/h speed of 518.19km/h, when I used the units change in options, it came up at 322.00mph. Going from this method along with using DE's calculation of 1.609344 it wound up with 518.21km/h, which is just off the mark. HOWEVER, using the tried and universally accepted figure of 1.6093 with no other decimal points put me SPOT ON THE MARK!! 322.00mph = 518.1946km/h. Round that down (under .1950) and it becomes 518.19km/h!! SUCCESS.
Other way around of 518.19km/h divided by 1.6093 = 321.9971mph, rounded up (over .9950) it becomes 322.00mph.
PROBLEMO SOLVE-O!!
*added bit* Still want someone else to do the run to double check if I'm right or not.
For example, I ran a 3000GT on max speed today. Got a km/h speed of 518.19km/h, when I used the units change in options, it came up at 322.00mph. Going from this method along with using DE's calculation of 1.609344 it wound up with 518.21km/h, which is just off the mark. HOWEVER, using the tried and universally accepted figure of 1.6093 with no other decimal points put me SPOT ON THE MARK!! 322.00mph = 518.1946km/h. Round that down (under .1950) and it becomes 518.19km/h!! SUCCESS.
Other way around of 518.19km/h divided by 1.6093 = 321.9971mph, rounded up (over .9950) it becomes 322.00mph.
PROBLEMO SOLVE-O!!
*added bit* Still want someone else to do the run to double check if I'm right or not.
- 345
- Germany at Nürburgring
i have a new record 483.xx km/h, the pic will coming soon, in mp/h if you want
- 1,164
- gtp_speedemon08
I..... ahem....I thinks we should get off the mph/kmh conversion now and leave this for speeds to be posted.
this might get nasty soon.....
this might get nasty soon.....
- 2,571
I thought of that. The issue is that you end up with a constant that works exactly for one particular speed, but may not be exactly accurate for others. It only takes one infinitesimal decimal place to cause rounding to work incorrectly when converting the speed, thus our constant must be perfectly accurate. You have, however, proven that the speed conversion is done differently to the car odometer conversion.mafia_boy
Quite apart from that, this is a Club for people who've reached speeds of over 300 miles per hour. "The 482.8032kph Club" doesn't have quite the same ring to it.
Hi there ty00123, that's a good starting speed. Did you read and follow all of the rules outlined in Post #1 when doing it?
Nice improvement, gtfan 👍
Leaderboard Updated
DE
- 3,948
- Sturgis, MI
- GTP_ty00123
Read them before I started, and just read them again to make sure I didn't miss anything. My run's clean.👍
Thanks for the welcome, too.
Leonidae
(Banned)
- 6,881
- GTP_Leonidae_MFT
Hmm.. btw, is the 6.2 mile 300ZX still the "weakest" roadgoing car to get into 300mph? AFAIK, it had 888bhp while I was doing those runs for a year, over and over and over again.. 
if there's other car that has less power and achieved 300mph+, let me know.
if there's other car that has less power and achieved 300mph+, let me know.
- 2,571
Leonidae
Can't even get 800bhp out of that baby, I believe it would've been around the 770 mark. Shame it had to be an R33, eh mate?Leaderboard
That's probably not the lowest-powered thing out there, either. Ask our esteemed wingman about the maximum power output of an S-Tune and you might have the least powerful car to crack 300mph.
Thanks for that, ty00123 - is there some sort of abbreviation I can use for you
- you're now on the Leaderboard. Welcome, once again, to the Club Leaderboard Updated
DE
- 3,948
- Sturgis, MI
- GTP_ty00123
Thanks for that, ty00123 - is there some sort of abbreviation I can use for you
Just go ahead and use "ty"; most people use that around here when addressing me.
*checks Leaderboard anxiously* YAYYYYY!!!!!! *runs around like a little kid for a minute*
But serioulsly, thanks.One quick question,though: If I update my speed, would you rather me make a new post or edit my old one?
- 2,571
Alright, I'll put it in bold so people know I haven't missed some letters out of 'tyre' or whatever
No problem, seems that's what I'm here for these days! It's nice to see someone genuinely glad to be here, too 
If you make a new speed, I'd prefer you make a new post - unless, of course, the most recent post is one of your own - so that I'm guaranteed to notice it! Apart from that, when this thread's moving at a high pace, backtracking to find your original post could get a bit time-consuming. Anyway, putting it in a new post means you get everyone else's attention and, sometimes, congratulations
Answering another question I misread your post to mean, just in case anyone else new is wondering- to avoid massive amounts of speeds that are sometimes very similar, each member is 'allocated' one slot for each car. So, if you post a speed in a new car, that's in a new entry on the Leaderboard, to allow people to hold speeds and records in multiple cars. However, if you post a faster speed in a car you've already used, your existing entry will be replaced. After all, there's no need for a several-thousand-entry Leaderboard showing everyone how slow you used to be, is there?
Random statistic for the moment: as things stand now, if all of our drivers had used all of the cars proven to be capable of 300mph, the Leaderboard would have 9,940 entries
DE
No problem, seems that's what I'm here for these days! It's nice to see someone genuinely glad to be here, too If you make a new speed, I'd prefer you make a new post - unless, of course, the most recent post is one of your own - so that I'm guaranteed to notice it! Apart from that, when this thread's moving at a high pace, backtracking to find your original post could get a bit time-consuming. Anyway, putting it in a new post means you get everyone else's attention and, sometimes, congratulations
Answering another question I misread your post to mean, just in case anyone else new is wondering- to avoid massive amounts of speeds that are sometimes very similar, each member is 'allocated' one slot for each car. So, if you post a speed in a new car, that's in a new entry on the Leaderboard, to allow people to hold speeds and records in multiple cars. However, if you post a faster speed in a car you've already used, your existing entry will be replaced. After all, there's no need for a several-thousand-entry Leaderboard showing everyone how slow you used to be, is there?
Random statistic for the moment: as things stand now, if all of our drivers had used all of the cars proven to be capable of 300mph, the Leaderboard would have 9,940 entries
DE
mafia_boy
(Banned)
- 5,570
- GTP_Mafiaboy
I think what we need to do is have someone do a 300+ run in any car, then convert to km/h by changing the units marker in options. Then do vice versa by doing the run in km/h then converting to mph. If there is any discrepency it will be found out this way by this method in conjunction with using the calculation.
For example, I ran a 3000GT on max speed today. Got a km/h speed of 518.19km/h, when I used the units change in options, it came up at 322.00mph. Going from this method along with using DE's calculation of 1.609344 it wound up with 518.21km/h, which is just off the mark. HOWEVER, using the tried and universally accepted figure of 1.6093 with no other decimal points put me SPOT ON THE MARK!! 322.00mph = 518.1946km/h. Round that down (under .1950) and it becomes 518.19km/h!! SUCCESS.
Other way around of 518.19km/h divided by 1.6093 = 321.9971mph, rounded up (over .9950) it becomes 322.00mph.
PROBLEMO SOLVE-O!!
*added bit* Still want someone else to do the run to double check if I'm right or not.
Very true with that and I can flip the script on it too. 400km/h FF's sound good, not 248.5552mph FF's.
- 1,164
- gtp_speedemon08
Hmm.. btw, is the 6.2 mile 300ZX still the "weakest" roadgoing car to get into 300mph? AFAIK, it had 888bhp while I was doing those runs for a year, over and over and over again..
there is also a weaker race car. the 787b, with about 700+ hp. but thats out of a turbocharged quad rotary, so that ain't bad.
- 2,571
I'm pretty sure the weakest car, full stop, is the Mitsubishi FTO Super Touring Car - with six hundred and something horsepower, if I recall correctly. I was about to say I have no idea how it managed it, with the not-too-great aerodynamics it has to cope with, but hey: it's four wheel drive, after all, and MasterStorm was driving it
Anyone have a precise figure for that car?
DE
Anyone have a precise figure for that car?
Leaderboard
DE
- 3,948
- Sturgis, MI
- GTP_ty00123
In all honesty, I've only had GT4 for about a month, so this is my first "major ahievement", if you will.Alright, I'll put it in bold so people know I haven't missed some letters out of 'tyre' or whatever
Figured as much; just wanted to make sure.If you make a new speed, I'd prefer you make a new post - unless, of course, the most recent post is one of your own - so that I'm guaranteed to notice it! Apart from that, when this thread's moving at a high pace, backtracking to find your original post could get a bit time-consuming. Anyway, putting it in a new post means you get everyone else's attention and, sometimes, congratulations
Another thing I had kinda figured just from looking at the Leaderboard; I had 3 speeds that were slower than the one I had posted.Answering another question I misread your post to mean, just in case anyone else new is wondering- to avoid massive amounts of speeds that are sometimes very similar, each member is 'allocated' one slot for each car. So, if you post a speed in a new car, that's in a new entry on the Leaderboard, to allow people to hold speeds and records in multiple cars. However, if you post a faster speed in a car you've already used, your existing entry will be replaced. After all, there's no need for a several-thousand-entry Leaderboard showing everyone how slow you used to be, is there?
All I can say is "Wow". I knew there were a lot of people, but I had no idea it went this deep.Random statistic for the moment: as things stand now, if all of our drivers had used all of the cars proven to be capable of 300mph, the Leaderboard would have 9,940 entries
DE
mcsqueegy
Premium
- 1,968
- Antarctica
The FTO tourer has 693bhp with an oil change. MasterStorm must be a madman! It probably is the least powerful car capable of 300mph.
- 1,164
- gtp_speedemon08
i have 2 more speeds i could post.they are both 305.xx mph.
*Question*
Are you allowed to post more than one speed?
*Question*
Are you allowed to post more than one speed?
- 1,164
- gtp_speedemon08
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