Does anubody know what is signal from VSS? Impulses or voltage? It is relative easy to make speed alarm using VSS signal.

it's impulses m8...625pulses/km

Thanks, very usefull information

Can you tell me what is the shape, square, duty cycle?

I have a logan 1.6 l and when I had 3500km on board the maximum speed I reached it was 165km/h. 5 months ago I've had almost 13500 km and with 4 peoples in it and the trunck loaded I've reached 185 km/h (on speedometer) ofcourse on highway and on stright line. The next day after that I was alone in the car, with no lugage and there was no way I could pass 180. Funny isn't it?

We mustn't forget two physical aspects:

1. Aerodynamic friction force, also knwn as "drag" increases with the square of the speed. So, if wind conditions are not equivalent, it is normal to have differences in maximum speeds of 10-15 km/h

2. Generally, roads aren't 100% horizontal. You either climb, or descend, without actually noticing it. So gravity may help you reach higher speeds when going down, or lower of course, when climbing.

Finally, I believe that in order to have reasonable results of maximum speed or accelerations, tests should be performed in both directions of the same road. Thus the average value is closer to reality.

PS Speeds over 150 km/s should be avoided... I personally believe that the steering isn't accurate enough at these speeds, in order to drive safely.

I`ll simlify: loaded car = lowered car for a few cm = better aerodynamics = higher top speed…

hmmm... by loading a car you don't change its shape, thus the drag should remain the same. Indeed, what you mean by "better aerodynamics" can be translated into better stability at high speeds.
But on the other hand heavier car means higher friction force between tyres and road = lower top speed

I must slightly disagree…
You happened to overlook some other aspects…



Attached File(s)
 Lowering_of_Lgn_1.zip ( 1.43mb ) Number of downloads: 87

chapter II
Lowering a car, even by loading, reduces total front area and the amount of air the car is pushing out of the way and
minimizes ground clearance and air flow under the car which causes a lot of drag.
Thus the drag will not remain the same but much lessened
"Better aerodynamics" means increased aerodynamic efficiency – a car cuts or splits through the air more smoothly,
of course with better stability.
Effects of higher weight and rolling friction are significantly overpowered by the benefit of reduced air resistance so,
on the straight, flat highway, normal weather conditions, decently loaded Logan achieves higher top speed than empty one …
Well, that`s practical, theoretical and scientifical truth
You may prove it...

PS. Gif is gift

Attached File(s)
 Lowering_of_Lgn_2.zip ( 1.52mb ) Number of downloads: 65

Maximum speed reached with 1.4 was 180km/h (on a highway). Speedometer lies not with 12-15 km/h, but with 20km/h.
Don't ask about rpm, at this speed I didn't care about rpm.

PS. I wasn't towed, I wasn't descending or in free fall, the wind wasn't blowing from behind. I don't have a GPS system to verify which is the real speed at 180km/h.

This post has been edited by IRONICK: 22 Feb 2006, 22:05

Logan 1.5dci laureat pack 155km/h on speedometer. This is not the top speed because gas pedal was on 2/3 pushed. My gues is that max on speedometar is 160-165. I will try some other time. This time I did't have a chance for max speed.

This post has been edited by bness: 7 Mar 2006, 12:42

Ambition, 1.6 MPI. I had 140 km/h on the spedometer. Around <4000 rpms. I think that this is a good cruise speed. You are not so bother by the engine noise, the steering feels OK.

P.S. I didn't drive it on the motorway. We have achived this speed on the road from Timisoara to Arad.

This post has been edited by Smeagol: 7 Mar 2006, 13:34

I have Ambition 1,6 MPI and my max speed on speed meter was 160Km/h (but the straight line was only 4Km); very hard from 145Km/h to 160Km/h and only if I change gear at 5000rpm otherwise I can't go faster that 140Km/h (on a 4Km road straight line)

I`ve tested my top speed twice between Ploiesti-Baicoi and Baicoi-Ploiesti. Between Ploiesti and Baicoi my top speed was 155 kmh with 4 people in the car the rpm was 3800-3900, when i returned Baicoi-Ploiesti was 173-174 the rpm was 4000. At 170> i think theat my speedmeter was going crazy becouse my car is a 1.5 dci and the top speed for this model is 155kmh. At theat speed the nois of the engine in the car was very loud. By the time of this test the car had 2000km and the tank half full. If the moderator thinks theat this speed is unreal then i`m asking him to delete my post. I have 3 withneses for this speed...

170km/h - 1,4 laureate

With my Laureate 1.6 MPI I went once in april 2005 from Bucharest to Constanta in a big hurry. I runned up to 160 km/h on the highway and made the whole trip in 2h 30min, even if I had to stay some 15min somewhere on the highway because of a car stopped which cought fire, until the firefighters came.
Anyway, checking some time later the instant fuel consumption readings, I saw that over approx. 130 km/h it goes towards 10 l /100km and higher, so i've let it slower on the road since then (for economical reasons, and safety, of course).

for 1.6 , 10 liters at full speed (4000 rpm) is a normal thing...

it would be 8,5 for 1.4

OK... I've done it again (that's second time). 175 - 180 Km/H on speedometer. Changed at 5500 RPM from IV to V. Started with 4000 RPM on V-th and went to ... I don't remember... somewhere arround 5000 RPM I guess. At that speed the car is more of a World War II airplane when it comes to sound. The engine screams and humms loud and the wind is making terrible noise. The pedal was to the floor.
With all this speed a Megane II Break went past me (I was accelerating from 140Km/H) and altho I stayed on 175 - 180 for a good while I couldn't reach it. It went much much faster.

On Bucharest Constanta highway 175 Km/h Ambiance 1.4

Speed record of my Logan 1.4 is 175 !

Looks like you really trust the speedometer
Logan 1,4 max speed is 162 km/h.

From 162 to 175 is a long way...you need 15 horse power more to do 175 km/h(real speed, not speedometer bullshit)

This post has been edited by argon: 28 Mar 2006, 10:30

ARGON ???

My speed record with Logan 1.6 is 180 km/h , 2 person

On several different occasions (full, half full, just driver) max speed on highway (Novi Sad-Subotica; Novi Sad-Beograd, Beograd-Nis) was 175 km/h @ unknown rpm, I had to look in front of me, not down
As I've read here, some people have problems with accelerating over 130 km/h in 5th gear.......Mine "Dacha" goes like hell in 5th
As far as rpms, this is for sure: 90km/h@2500 rpm; 110 km/h@3000rpm; 60km/h@1500 rpm (all 5th gear)
Fuel consumption at max speed......just 17 L/100 km

EXACTLY
These kids think they have Jags under there arses
I like the one who can see he is doing 175kph but could not read the rev counter
Stu
Ps I have not driven mine over 155 kph .If I wanted to go fast I could have kept my Rover 825 and used lots of fuel doing so
Stu

31 May 2007, 18:31:

................................................................................................................

KEEP ON DRIVING LIKE THAT AND YOU NOISY ENGINE WILL BECOME QUIETER
VERY QUIETER
sTU

This post has been edited by martin245: 31 May 2007, 19:31

I think that speed alarm is board computer feature which can be setting-up by owner, is not? Board computer in VW Cady have this feature - you can adjust this alarm on speed you want, and sound is like a gong.

OH MY GOD
My speed alarm is me !!! Myself ...My own common sense
who need a fucking dong or beep to tell you that you are driving or pushing your car to the limits
Stu

Just one question guys.
On which planet do you live?
Ain't there no cops at all?!

Almost all those "rockets" at 160+ kmph would be caught in Estonia, and you'd have not just fifteen minutes of fame promised by Andy Warhole but the whole evening of fame. Your story would be printed white on black in the evening news.



I'm what Australians call a Volvo driver: town 50/70, highway 90/110 (e.g. always within speed limits).

Ciao

This post has been edited by Uri: 1 Jun 2007, 22:03

Oh martin

Do you maybe know how many lines are in speedometer? You look at it every day

I just know that if I can see the Rev Counter I can see the Tachometer