How fast?

[SkylineUSA]

R32s use a cable, and I think the R34s do as well, but I am not 100% positive about the R34.

Here is a pic of the R32 with the MPH gear installed.

[RazorGTR]

It actually uses something simular and both. The speedo is as shown is cable driven/operated, but also if you trace that cable up it joins at a little box. The ecu in turns picks up a signal from that to process that information for the ATTESSA.

[Moppie]

Originally posted by RazorGTR
but also if you trace that cable up it joins at a little box. The ecu in turns picks up a signal from that to process that information for the ATTESSA.

God damn :huh: that, ummm somewhat primitive.
It clearly works, but well ask anyone with a rally car where the Halda is driven off a cable and they will tell you how inaccurate it is.

And wouldnt that mean that the cars fitted with a MPH converter are getting a signal being sent to the ECU that would be slower than the car is really going? Not something I would consider to be very good for the speed sensitive 4WS?

[CAptynCrunch]

Ok, I've got to ask cause these speeds seem rather low.

When you guys hit them how much did the car have left in it? I'm asking because my cousin's 91 Protege GT has broken 140MPH completely stock. Actually it is in worse condition than stock, but with only a 1/4 tank and no back seats so it's down to just a bit over 2000lbs.

As has been mentioned speedos aren't that reliable but it reads to just past 140MPH and it was totally buried.

[Assasin11-17]

Had more juice to go but I had to slow down for the upcoming corners. Plus my heart rate was up there. Like I said before it was a short straight way. I am looking for a device with a true speed sensor though. I spotted somthing in a magazine with a lighter plug in that fits in the dash but I forgot what the name was. Like SkylineUSA stated before the car was hugging the ground very well with little or no shaking. In one word "Dreamy".

[SkylineUSA]

Just because a Speedo says your going over a 140MPH, does not mean you are, trust me. I have seen them off over 20mph at higher speeds, not say that speedo was off, but they are not that accurate.

In one of the high speed shootouts I read last year, one cars speedo said its was doing 203, when actually it was doing 178. And this was a very high dollar car.

Also, at high speed like that aerodymanics plays a major roll in speed as well. A few months ago here in the UK, they had a R33 go over 200+, with a radar gun, that was amazing.

[Moppie]

To claim that 250kmh is "slow" implies either your driving some VERY exotic mechinery, or your just ever so slightly mad.

Its faster than most ppl will ever go in thier life, and altough with in reach of most modern cars requires such a long straight piece of road that most would never get the chance.

My dead Civic for example was in theory capable of reaching 240kmh before red lining in 5th. Iv never got above 180 in it becasue the speed cut stopped me, and because the car was never designed to be driven at that speed and started to become aerodynamicly unstable on our uneven roads. However I do know someone who has done it with a European car which never had the speed cut, he claims the car actualy settled down at 240kph, but he did the run on a German autobahn, where the road is long straigh and very smooth.
So although the car could get up there (ands it was a faster car than the average) it took a while to get there, and wasnt really happy to be there.
Its really any great acievement.



Iv hit about 240kph in a car designed to go that fast, and when you get there in the same time it takes most cars to make it to 100 and are able to do it on a county road with out realising untill you stop and think hey im pulling 5,000rpm in 5th, you know that your in a truely fast car.
I should imagine the GTR is a similar experiance.



On the note of accurate speed sensors, Cars fitted with a VSS will be very accurate, since its a purly digital process, there is no room for error from things like flex in the cable, or inacuracy in the speed mechanism.
But they are also very simple, and Im sure you could either build your own with a few simple parts from an electronics store and a circut diagram, or even adapt one designed for use on bikes.
The hardest part would be mounting a sensor somewhere where it will not get knocked or moved which will affect its accuracy. On a drive shaft would be the best option.

But I wonder if you could prehaps also tap into the ABS sensors signal and use that?

[CAptynCrunch]

Originally posted by Moppie
To claim that 250kmh is "slow" implies either your driving some VERY exotic mechinery, or your just ever so slightly mad.

Well, as far as I can tell there were only 1200 or so imported to canada, but it's still a FWD Non-turbo protege. As for the slightly mad part I get that a lot, although the driver is a little more off, he's the one who jumps out of moving cars for happy meals.

Its faster than most ppl will ever go in thier life, and altough with in reach of most modern cars requires such a long straight piece of road that most would never get the chance.

My dead Civic for example was in theory capable of reaching 240kmh before red lining in 5th. Iv never got above 180 in it becasue the speed cut stopped me, and because the car was never designed to be driven at that speed and started to become aerodynamicly unstable on our uneven roads. However I do know someone who has done it with a European car which never had the speed cut, he claims the car actualy settled down at 240kph, but he did the run on a German autobahn, where the road is long straigh and very smooth.
So although the car could get up there (ands it was a faster car than the average) it took a while to get there, and wasnt really happy to be there.
Its really any great acievement.

True, but the car pulls surprisingly well in 5th gear and was very stable. I'm in no way implying it's anything compared to a skyline which is what prompted the question in the first place because it seems that a skyline should be so much faster.

Iv hit about 240kph in a car designed to go that fast, and when you get there in the same time it takes most cars to make it to 100 and are able to do it on a county road with out realising untill you stop and think hey im pulling 5,000rpm in 5th, you know that your in a truely fast car.

This is what I was getting at I know that the skyline would reach 240 way before the protege but I expected that it would be able to keep going a lot farther. But then, I don't know what the gear ratios are like so it was kinda dumb to assume anything

[R33]

Personally I had clocked 245kph on the front straight at Sepang F1 track...the front straight is 0.9 km long.
I am not very much a speedster on the road unless an exotic car is constantly kissing my ass! Never went more than 220kph on the road.
But that crazy Nagata San (he who drove 200mph in a tunnel) had clocked 302kph in my car at 3 am in Singapore with the tacho at almost 8000rpm. The car has another 500rpm to go...so dunno the max speed it cud go....

[Moppie]

Originally posted by R33

But that crazy Nagata San (he who drove 200mph in a tunnel) had clocked 302kph in my car at 3 am in Singapore with the tacho at almost 8000rpm.

Now thats impressive!
I think theres an almost exponetial relationship between a cars top speed and the amount of hp required.
Anything above 250 is impressive, 300 is crazy!

I remember racing a mates MK1 MR2 in my little kit car. He had a huge power advantage, I had a weight advantage. From 0-100kph we were equal (I had wheel spin issues all the way ) but at 100kph it was like my car hit a brick wall as the aerodynamics came into the equation.
For a car to get above about 250kph then it needs to either have a LOT of power, or be every aerodynamic, or both.


But then I find anything above about 160kph feels pretty much the same, and like all driving in a straight line is rather boring.

[gtr baker 207010]

145 mph (245 kph) in my dads mondeo !!!!!!

[Supra650RSP]

Ok, So my Skyline is in pieces right now and this thread sucks, because honestly, I haven't had a chance to find out what the little bastard will do and I'm getting kinda jealous.
Anywayz, I'm pretty sure that when its done it'll play at speeds close to or above the Supra I'm driving now. I've run the Supra up to 180 mph on the speedo and I'm farely confident that it is pretty accurate. The Stock Supra has a speed limiter set by the computer at 160 and they work show 160 on the speedometer. I'm also confident that the Skyline speedo is accurate to some degree, at least at around 80 mph because I've run past those nifty little "Your Speed" signs at 80 to see how accurate they were and they were always within one or two mph. So, what I'm saying is, when the car in done, well see. I'll get to do some testing at a track near here and I'm hoping it out performs the Supra.

[Assasin11-17]

Before I had my car chipped the lil darling's limmiter would come on around 180~190kph unfortunately the dial was way past the 180 mark all the way pegged out. I really hated the feel of the limiter kicking in. Always sucks to know you can go lots faster.

[EncryptedMinds]

Now I'm wondering how fast I was going. The speedo said 165mph but I know it was at least somewhat off. I wonder how much though...

[phatdex]

145mph in a mondeo, a few of these cars I didnt think those speeds were possible. Anywhooo, who cares about topspeed, it only matters how fast it takes u to get to the speed.
Top speed will have a lot to do with gearing. U can gear ur car to get to 200kph in 3 seconds but it wont go much faster than that, alternatively u could take 40secs to get to 200 and be able to make it to 300.
So top speed is gay.