GTO3 Top speed ???
Discussion
Hi All,
Just ditched my Lotus Elise Sport 160 for a new GTO3 in titanium which I collected this Saturday.
The first question everyone asks is "how fast does it go?". I know this sounds silly, but I don't know the answer. Can anyone actually tell me what the top speed of my car is? I know the 2.5 litre was supposed to be good for 165mph, so does the extra 30bhp make any difference?
Phil
Just ditched my Lotus Elise Sport 160 for a new GTO3 in titanium which I collected this Saturday.
The first question everyone asks is "how fast does it go?". I know this sounds silly, but I don't know the answer. Can anyone actually tell me what the top speed of my car is? I know the 2.5 litre was supposed to be good for 165mph, so does the extra 30bhp make any difference?
Phil
guysh said: I shouldn't think that the top speed will be too different 'cause the car reaches max rev's in top and the wing gives a fair amount of drag...
Sure, but is the final drive ratio not different between the 2.5 litre and 3 litre engines?
I was told by Alan Wallace (I believe he's left the company now) that the 2.5 litre and 3 litre engines were quite different, which led me to suspect that 5th gear and final drive ratio might also have changed to suit the different power characteristics.
Phil
AB - should be fuN!
I had from "unoffical" sources that the 2.5 would hit 'about' 180ish if the ECU limiter was taken off. AFAIK the same code is in the 3l, so expect the same limit. Looking at the power outputs of the two engines, I can't see the 3l engine having much more torque at 6000ish revs at 165 to extend it much further than 175-180....
Remember BHP sells cars, torque wins races.....
J
>> Edited by joust on Wednesday 29th January 07:13
I had from "unoffical" sources that the 2.5 would hit 'about' 180ish if the ECU limiter was taken off. AFAIK the same code is in the 3l, so expect the same limit. Looking at the power outputs of the two engines, I can't see the 3l engine having much more torque at 6000ish revs at 165 to extend it much further than 175-180....
Remember BHP sells cars, torque wins races.....
J
>> Edited by joust on Wednesday 29th January 07:13
In brief, and according to a reliable source, these might help to clarify the situation on 3.0 litre vehicles:
Final drive is not altered at present - it's the same-spec MTX75 it's always been. LSD box may differ though.
2.5's are good for low-160's, whereupon they lose the fight against aerodynamics.
3.0 has been up to 170 (on the clock) at test track, with more to come. This should equate to a realistic v-max of 170 on the road.
Hope this helps any pub-type "What'll she do?" dilemma's...!
Final drive is not altered at present - it's the same-spec MTX75 it's always been. LSD box may differ though.
2.5's are good for low-160's, whereupon they lose the fight against aerodynamics.
3.0 has been up to 170 (on the clock) at test track, with more to come. This should equate to a realistic v-max of 170 on the road.
Hope this helps any pub-type "What'll she do?" dilemma's...!
I posed this question to John Hammond at Noble (I understand that he's taken over from Alan Wallace) and he tells me that the ratios between the two cars are exactly the same and top speed for the GTO-3 is "165 plus".
So until someone puts a GTO-3 through the timing lights then we're not likely to know for sure.
Phil
So until someone puts a GTO-3 through the timing lights then we're not likely to know for sure.
Phil
joust said: Looking at the power outputs of the two engines, I can't see the 3l engine having much more torque at 6000ish revs at 165 to extend it much further than 175-180....
Theory suggests the top speed of the 3l should be about 3% higher than the 2.5l.
See www.pumaracing.co.uk/topspeed.htm
Remember BHP sells cars, torque wins races.....
The dominant force limiting top speed is aerodynamic drag, which requires power to overcome...
Jim
Nooooooooooooo - let's not get into a power vs torque thread - it's been done too many times before!
JimNoble said:The dominant force limiting top speed is aerodynamic drag, which requires power to overcome...
Jim
I was only being toungue in cheek with my comment.
Anyway - anything over 160 is bloddy scary, so I'm not exactly looking to find out what VMAX is anyway
J
stuh said: Excellent article Jim
Is there anything on how power and weight effect acceleration from a similar mathematical perspective ?
As interesting as it is to some people I'm really not too interested about how we guess top speed or acceleration. I want to know what the top speed of my car physically is and there is only one way to arrive at the answer - less jargon and techno-bable and more driving, preferably down a long straight road with some timing lights. I was enquiring about top speed, not the laws of physics - this has been done to death in numerous other forums and is now a bit old. I thought this was a forum for Noble owners, not physicists.
Looks like I'll have to find out the hard way.
Phil
Who cares !
Around Silverstone i hit about 140ish on the straights and if i tried on the public roads i'll get a good slap from nice mr
, a few mph on the top speed means nack all in the real world as your never gonna get there !
I'd expect better from someon hailing from the home of the countries finest football team
Around Silverstone i hit about 140ish on the straights and if i tried on the public roads i'll get a good slap from nice mr
, a few mph on the top speed means nack all in the real world as your never gonna get there ! I'd expect better from someon hailing from the home of the countries finest football team
I did a trackday at Spa and had mine flat out
on the outward and inward journey.
To be honest 150 - 155 is quick there after it tails
away quite quickly. I did manage 160-165 but after
150 the speedo also wobbles as if its not really sure.
As a comparison to my TVR Griff 500 that pulled
170 with the top off. I think if it's straight line top end your on a looser.
Still when do you get to do 150+ in a real world ? Very rarely. However fast you are there is always someone else quicker as the Ferrari 360 Modena proved when he passed my TVR doing 170 on his way to 200+
They have a GTO3 at Gatwick airport in the departure lounge at the moment that they are selling raffle tickets for at £25 a go. The car info next to the car states max speed 186mph Restricted???????
>> Edited by andyeley on Wednesday 29th January 15:00
on the outward and inward journey.
To be honest 150 - 155 is quick there after it tails
away quite quickly. I did manage 160-165 but after
150 the speedo also wobbles as if its not really sure.
As a comparison to my TVR Griff 500 that pulled
170 with the top off. I think if it's straight line top end your on a looser.
Still when do you get to do 150+ in a real world ? Very rarely. However fast you are there is always someone else quicker as the Ferrari 360 Modena proved when he passed my TVR doing 170 on his way to 200+
They have a GTO3 at Gatwick airport in the departure lounge at the moment that they are selling raffle tickets for at £25 a go. The car info next to the car states max speed 186mph Restricted???????
>> Edited by andyeley on Wednesday 29th January 15:00
As already mentioned, it's not that relevant in the real world but if you are insistent 
.
171 mph on the speedo according to my passenger because even at Bruntingthorpe on a 2 mile long by 100 metre wide runway, such speed tends to preclude other than a quick glance (2.5L). Nice to have you on board, let us know what you get.
. 171 mph on the speedo according to my passenger because even at Bruntingthorpe on a 2 mile long by 100 metre wide runway, such speed tends to preclude other than a quick glance (2.5L). Nice to have you on board
, let us know what you get.
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