Technical GPS 1.9 Multijet top speed

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Technical GPS 1.9 Multijet top speed

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mehstg

GPS Multijet 1.9 Orange
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Another question for the more technical peeps, as I am feeling in an inquisitive mood today.

I was over at North Weald Airfield the other day as one of my friends works there and had the chance to take my Grande along one of the runways.

Took it up to about 115, but as the book top speed is 124, didn't want to take it any higher. The thing is, it got to 115 easily, and was still pulling hard....

I take it the fact it still pulls hard at 115 is due to the fact I have had it remapped. But obviously, other components have not been upgraded like the oil pump and i'd be worried about oil circulation at any speed higher than the quoted.

My question is, what really is a safe top speed for the car, and what damage happens if you go over this.

P(y)
 
iv had 120 out of mine and mines still standard. still have a fair amount of rev's left too... again didnt want to take it over that tho... however the question you have raised is a good one...
 
Dont forget the speedo over-reads by 10% to protect the company against speeding pursuits ;)

So when you say you got 120 out of it, it was in all likelihood 108.

Unless of course you used an accurate GPS system.

Also dont forget the T-Jet engines are over-powered compared to what it says in the book. 120 T-Jet is actually about 130BHP so the top speed will be a little higher.
 
Dont forget the speedo over-reads by 10% to protect the company against speeding pursuits ;)

So when you say you got 120 out of it, it was in all likelihood 108.

Unless of course you used an accurate GPS system.

Also dont forget the T-Jet engines are over-powered compared to what it says in the book. 120 T-Jet is actually about 130BHP so the top speed will be a little higher.

I've heard this about speedos before. I thought they had to be accurate from a legal standpoint surely under-reading by 10% wouldn't be accurate.
 
They dont under-read, they over-read. And it is legal they are keeping you in the speed limit, and protecting themselves!
 
good for those average speed cameras though (y)

the top speed before damaging is a good one i heard like with the buggatti veyron its engine could go faster but they wouldnt allow it because of the fact every other componant would need to be built to go faster such as the tyres etc.
 
There is a severe lack of knowledge about Speedo's over-reading it seems. Take these average cameras on the M1 north of leeds, 50MPH for about 5 miles.... I stick cruise control on at 54MPH on the Speedo, and am usually the only person that does it (by that i mean i dont see anyone doing the same speed). Therefore i get through legally, faster, and with no chance of a ticket!
 
Well ACPO guidelines are speedlimit + 10% plus 2 so an actual 57 mph gets you a ticket. So you could theoretically set your cruise to 60mph on the speedo and not get done...not something I'd like to try tho!
 
Well ACPO guidelines are speedlimit + 10% plus 2 so an actual 57 mph gets you a ticket. So you could theoretically set your cruise to 60mph on the speedo and not get done...not something I'd like to try tho!

Haha same with me, wouldnt try it. Dont trust average cameras ;)

I thought those guidelines were only for the yellow boxes, not ASC :eek:
 
There is a severe lack of knowledge about Speedo's over-reading it seems. Take these average cameras on the M1 north of leeds, 50MPH for about 5 miles.... I stick cruise control on at 54MPH on the Speedo, and am usually the only person that does it (by that i mean i dont see anyone doing the same speed). Therefore i get through legally, faster, and with no chance of a ticket!

hang on a minute - i thought it was the speed camara that have a 10%....

n e ways i have never heard of the speedo under reading... that seems a little crazy... anyone one else heard of this?
 
Its true trust me, i imagine about 30% of people will know on this forum...
The Cameras over-read for the guide-lines mentioned above by StevenRB45
 
ok sooooo .... (sorry for using this example i know ppl quote top gear loads but its a valid point)...

tonight on top gear they where trying t get that corvert to hit 170 right.? he was reading up the speedo at some points and i think he managed t get 173... they where clocking this speed with a gun.... so ur telling me for him to hit 170 mph his speedo has to b reading 187mph.........

this is why i kinda dont beleive what ur saying... you could b right. thats why am asking if n e one else has heard this b 4
 
ok sooooo .... (sorry for using this example i know ppl quote top gear loads but its a valid point)...

tonight on top gear they where trying t get that corvert to hit 170 right.? he was reading up the speedo at some points and i think he managed t get 173... they where clocking this speed with a gun.... so ur telling me for him to hit 170 mph his speedo has to b reading 187mph.........

this is why i kinda dont beleive what ur saying... you could b right. thats why am asking if n e one else has heard this b 4

May be different on american cars, i cant remember him saying 172...173 etc i thought he was doing it in the 140's

Also it is a car born to race, the manufacturers will probably want accurate speedos on that kind of car... They have the money for lawsuits etc.

People but them cars to race...... The buyers wouldnt be happy with inaccurate speedo's i imagine.
 
May be different on american cars, i cant remember him saying 172...173 etc i thought he was doing it in the 140's

Also it is a car born to race, the manufacturers will probably want accurate speedos on that kind of car... They have the money for lawsuits etc.

People but them cars to race...... The buyers wouldnt be happy with inaccurate speedo's i imagine.

hmmm ok fare enough - well if its true - you learn something new every day ;)

n e ways back to the point of safe top speeds for the engine???
 
hmmm ok fare enough - well if its true - you learn something new every day ;)

n e ways back to the point of safe top speeds for the engine???

Iirc the speedo cannot under-read at all, but can over-read by up to 10%. It's up the maker of the car how much time and money they spend getting it 100% right.
 
Another question for the more technical peeps, as I am feeling in an inquisitive mood today.

I was over at North Weald Airfield the other day as one of my friends works there and had the chance to take my Grande along one of the runways.

Took it up to about 115, but as the book top speed is 124, didn't want to take it any higher. The thing is, it got to 115 easily, and was still pulling hard....

I take it the fact it still pulls hard at 115 is due to the fact I have had it remapped. But obviously, other components have not been upgraded like the oil pump and i'd be worried about oil circulation at any speed higher than the quoted.

My question is, what really is a safe top speed for the car, and what damage happens if you go over this.

P(y)

:ROFLMAO:
 
hang on a minute - i thought it was the speed camara that have a 10%....

n e ways i have never heard of the speedo under reading... that seems a little crazy... anyone one else heard of this?

No if you go through a camera the general rule is you get 10% on top of what ever the speed limit is where the camera is ie in a 30mph zone your normally fine up to 33, 50mph zone is 55mph etc etc.

Speedos generally over read by up to 10%. This is why you get a road angel or something on the go and it will tell you your true speed.

And do you have alot of keys missing from your keyboard or something?
 
No if you go through a camera the general rule is you get 10% on top of what ever the speed limit is where the camera is ie in a 30mph zone your normally fine up to 33, 50mph zone is 55mph etc etc.

Well ACPO guidelines are speedlimit + 10% plus 2 so an actual 57 mph gets you a ticket.

to quote myself earlier in the evening....
 
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