Aygo Restricted?

[rgvsean]

Testing out the aygo at the weekend it revs happily to 6000 in the first 3 gears but when I did a top speed check (on a closed private road and NOT the A1) it was stopped at 5000rpm and 100 indicated mph.

To me it felt like an electronic restriction as the engine sounded very healthy.

Anybody any info?

[moonstone mart]

It could well be restricted for safety reasons. Toyota dont want people going too fast in them incase they shake to pieces :meet: ;)

Mart

[rgvsean]

That's what I thought. But then I also would like to see the peoples faces as i cruise past at 120 in my Aygo (ok forced smile while scared on the inside)

[moonstone mart]

I usually get one of our courtesy aygos to travel to the Toyota academy in notts every now and again. It doesnt feel the most stable car at that speed but it always gets me there and back.

Mart

[Red Yaris 54]

That's what I thought. But then I also would like to see the peoples faces as i cruise past at 120 in my Aygo (ok forced smile while scared on the inside)

But you wouldn't cruise past people at 120 on a private road..........................would you?? ;)

[Jan van de Wouw]

Could well be restricted, as the original tires are only rated for 100mph.

If they construct the car to go faster they'd need to

fit different tires,which might decrease economy...

And there could be liability issues as well...

[BadBoyVTEC]

But changed wheels and de-restricted how much faster could it possibly go?

[T V O R]

I also would like to see the peoples faces as i cruise past at 120 in my Aygo (ok forced smile while scared on the inside)

The Aygo isn’t built or designed for high speed; it’s an economical city car. Even if you got it that fast there’s the problem of stopping it (thin tyres, drum brakes etc).

If you want a Toyota hatchback that will do 120mph+, look at a Yaris T Sport/1.8 SR or the bigger Auris

[T600]

Testing out the aygo at the weekend it revs happily to 6000 in the first 3 gears but when I did a top speed check (on a closed private road and NOT the A1) it was stopped at 5000rpm and 100 indicated mph.

To me it felt like an electronic restriction as the engine sounded very healthy.

Welcome to air-o-dinamiks ;)

[rgvsean]

Thanks.

It did cross my mind but it doesn't feel like that is what it is. I thought the car felt quite stable at 100 actually.

I don't really want to go any faster as it defeats the object of the car but I simply don't like restrictions.

Can't be a restriction in the exhaust as it's not in all gears. It would be very easy to set and therefore un-set those parameters in the ECU. As they do on BMW's and Audi's etc to limit to 155 for eg.

Only problem is when you take it to a performance tuning centre people may laugh :D

oh and for any fuzz reading this the car is only used for track days

[rgvsean]

I also would like to see the peoples faces as i cruise past at 120 in my Aygo (ok forced smile while scared on the inside)

The Aygo isn’t built or designed for high speed; it’s an economical city car. Even if you got it that fast there’s the problem of stopping it (thin tyres, drum brakes etc).

If you want a Toyota hatchback that will do 120mph+, look at a Yaris T Sport/1.8 SR or the bigger Auris

I know, I am currently selling a 140+mph car because I don't need it. Aygo is the smallest car I have ever owned - I have a small motorbike that I constantly try to make faster and faster (until it blows up of course) but it's much more fun making something faster and better than it came out of the factory and then beating more modern faster stuff, than just buyng one. In my humble opinion ;)

I probably wouldn't do anything about it, I just wondered if it was restricted out of curiosity.

[T600]

It did cross my mind but it doesn't feel like that is what it is. I thought the car felt quite stable at 100 actually.

I wasn't suggesting that it would be unstable at that speed.

But with any car you reach a limit to how fast its engine is capable of pushing it through the air. IIRC, the air resistance rises to the cube of the speed so to increase top speed just slightly requires a lot more power. I could be wrong, but I'd be very surprised if the limit you are experiencing is anything other than you reaching the point where the existing engine cannot make it go any faster without either more power, or less wind resistance.

[rgvsean]

I understand the principle. I am an aircraft engineering techincian, aerodynamics quite important and the theory is very dull and lengthy.

What you are suggesting is that the car gets to the point where drag = thrust If this is the case then top speed runs into and with the wind should throw up differing top speeds.

Will have to check it out someday.

I agree with what you say being a possibilty but I would have expected more protesting from the car if it was the case.

Wish I never mentioned it now lol

[T600]

If this is the case then top speed runs into and with the wind should throw up differing top speeds.

Agreed, if you drive into a head wind your top speed should be reduced by the speed of the wind. And your return trip up the private road would be faster by the same amount.

That would certainly prove it either way. If you still get 100mph each way then it has to be governed in some way.

I'd be interested to hear the results.

T

[rgvsean]

I'll let you know as soon as I find a flat non-inclined road surface with the wind running at a constant speed exactly in line with the direction of travel. Oh and it has to be a closed public road.

Shouldn't take too long

Sooooooooo does anyone know if it's restricted?

[Jan van de Wouw]

I DO know that my Aygo will do 158kmh (on

the GPS) on a flat road, no wind and A/C on...

[rgvsean]

Yeah that's about 98-100 but at what REVs on the engine?

[Jan van de Wouw]

Yeah that's about 98-100 but at what REVs on the engine?

It's been a couple of weeks since then and I didn't really pay attention...

I was in 5th gear and I'm 100% positive I still hadn't touched the redzone,

so I think it'll have been somewhere around 5500rpm?

[Jp-Auris]

what has the A/C have to do with anything when testing top speeds?

[Jan van de Wouw]

what has the A/C have to do with anything when testing top speeds?

A/C typically can take up to 10hp to drive the compressor, with the A/C on and the compressor

engaged you can really feel the engine has to work harder to maintain a certain speed.

As I had the A/C on the engine had to work harder, but still managed to get up to 158kmh.

[Jp-Auris]

what has the A/C have to do with anything when testing top speeds?

A/C typically can take up to 10hp to drive the compressor, with the A/C on and the compressor

engaged you can really feel the engine has to work harder to maintain a certain speed.

As I had the A/C on the engine had to work harder, but still managed to get up to 158kmh.

so basically having the A/C is bad?...if the engine has to work harder.... or its good...because is engine is working HARDER with the A/C on..

[DellaRed]

interested in this one ... awh but poor little engine :( ... just be careful!

[Gryzor]

Yeah that's about 98-100 but at what REVs on the engine?

It's been a couple of weeks since then and I didn't really pay attention...

I was in 5th gear and I'm 100% positive I still hadn't touched the redzone,

so I think it'll have been somewhere around 5500rpm?

Well, I've done the same (some 165km according to the meter, about ten km less according to the GPS), but it never went much more than 4k rpm...

[Gryzor]

so basically having the A/C is bad?...if the engine has to work harder.... or its good...because is engine is working HARDER with the A/C on..

Well, I guess it depends on the conditions. Ceteris paribus, it puts more strain on the engine, but it's not necessarily too bad - normal use is within the design specs, I should guess. But if it's, say, a hot day and your dilemma is "windows down or A/C on?", then if you go fast it's probably better to turn the A/C on because the aerodynamics get screwed up when you go fast with windows down.

Oh, please feel free to bash my head in if what I say is stupid.

[Kev Mc]

Either way, if the top speed is limited it is because certain components can't cope with the 'natural' top speed so if the car has a limited top speed & you want to remove it, make sure you improve whatever needs improving. Something failing at 100mph+ would never be good in any situation. Take care