Discussion
1298 cc, Supercharged Hayabusa, 398 BHP, this is a very serious car, I drove it at Ridge Park Motor Sport, 162 MPH at 10,800 RPM
https://www.facebook.com/video.php?v=3335997833865...
https://www.facebook.com/video.php?v=3335997833865...
Yes they do and it also it rips off the front wings I think someone did some aero work some years ago, but not many 7's can exceed 150ish anyways due to gearing, I run 3.19 diff with a Sadev overdrive box and a K20 Honda that revs to 9k 265 hub BHP and 166 LB FT and it's proper scary above 160, but then most things are!!!
apexcone said:
1298 cc, Supercharged Hayabusa, 398 BHP, this is a very serious car, I drove it at Ridge Park Motor Sport, 162 MPH at 10,800 RPM
https://www.facebook.com/video.php?v=3335997833865...
That's video link to Facebook does not work for me?https://www.facebook.com/video.php?v=3335997833865...
k20erham said:
Yes they do and it also it rips off the front wings I think someone did some aero work some years ago, but not many 7's can exceed 150ish anyways due to gearing, I run 3.19 diff with a Sadev overdrive box and a K20 Honda that revs to 9k 265 hub BHP and 166 LB FT and it's proper scary above 160, but then most things are!!!
My wings are bonded with Bighead fasteners, what are they good for, MPH?Gingerbread Man said:
k20erham said:
Yes they do and it also it rips off the front wings I think someone did some aero work some years ago, but not many 7's can exceed 150ish anyways due to gearing, I run 3.19 diff with a Sadev overdrive box and a K20 Honda that revs to 9k 265 hub BHP and 166 LB FT and it's proper scary above 160, but then most things are!!!
My wings are bonded with Bighead fasteners, what are they good for, MPH?https://www.youtube.com/watch?v=z2SH991zDHE
apexcone said:
The car runs a large front wing CSR front fenders. at NO time at high speed did the car feel unsafe.
https://www.youtube.com/watch?v=z2SH991zDHE
Really? I guess it won't be long before some one claims 180 mph feels safe in a 7 !https://www.youtube.com/watch?v=z2SH991zDHE
The following is from comments from the link below: should help a healthy discussion:
The diffuser is a waste of money. Full stop. Period. Don't even bother.
The CSR front wings will reduce lift by about 3% (+/- ISTR)
The little aero winglets on the nose of the CSR help reduce lift another 3% (again, +/- ISTR).
There's nothing else you can tack on that helps out much, if at all.
Getting rid of the windscreen is about the best thing you can do.
"Doors" may provide a little better airflow over the car.
Putting some kind of roof on would help a lot
The 7 is an aerodynamic brick.
http://californiacaterhamclub.com/chat/archive/ind...
You may find the this document interesting it confirms the 7 is an aero dynamic Brick
Manufacturer
Vehicle
Vehicle Type
CD (base)
CD (best)
Lotus
Elise S2 (2003 MY)
Convertible Sports Car (Mid Engine)
0.29
-
BMW
Z4 (2009 MY)
Convertible Sports Car (Front Engine, Steel Roof)
0.34
-
Mazda
MX5 (1989 MY)
Convertible Sports Car (Front Engine)
0.38
-
GTM
Spyder
Convertible Sports Car (Mid Engine)
0.40
0.40
AMS
Murtaya
Convertible Sports Car (Front Engine)
0.45
0.42
Trident
Iceni
Convertible Diesel Sports Car (Front Engine)
0.46
0.41
Gardner Douglas
GD T70
Open Sports Car (Mid Engine)
0.48
0.48
RAW
Fulcrum
Open Sports Car (Front Engine)
0.57
0.51
Westfield
7
Convertible Sports Car (Front Engine)
0.64
0.64
Caterham
7
Convertible Sports Car (Front Engine)
0.70
-
http://www.nichevehiclenetwork.co.uk/wp-content/up...
clarkey said:
I didn't like driving the 7 at a high top speed - I once got laughed at for lifting off half way down the back straight at Cadwell in an R500..... to me, 130+ didn't feel good at all.
I've owned 7s since 1975, all I can say is maybe I've just got use to it the car feel nervous at high speed. The other issue is alignment changes make a huge difference to the 7s stability. clarkey said:
I didn't like driving the 7 at a high top speed - I once got laughed at for lifting off half way down the back straight at Cadwell in an R500..... to me, 130+ didn't feel good at all.
I've owned 7s since 1975, all I can say is maybe I've just got use to it the car feel nervous at high speed. The other issue is alignment changes make a huge difference to the 7s stability. apexcone said:
I've owned 7s since 1975, all I can say is maybe I've just got use to it the car feel nervous at high speed. The other issue is alignment changes make a huge difference to the 7s stability.
getting used to the 7's nervousness at high speed does not make the 7 stable......its a brick, and does not have any real downforce....... even cars that do have downforce go unstable https://www.youtube.com/watch?v=SFN_Gp1eHN0 end of discussion. Edited by Toaster on Friday 10th April 23:04
Toaster said:
getting used to the 7's nervousness at high speed does not make the 7 stable......its a brick, and does not have any real downforce....... even cars that do have downforce go unstable https://www.youtube.com/watch?v=SFN_Gp1eHN0 end of discussion.
So I guess that's the end. Edited by Toaster on Friday 10th April 23:04
Toaster said:
You may find the this document interesting it confirms the 7 is an aero dynamic Brick
Well, sort of. Whilst it isn't all that great in Cd (OK, it is awful), what really matters is CdA. So it might be a bit bricky, it is a small brick rather than a wall 
Motorbikes have a Cd around the same as a 7, but they are even smaller in frontal area.
Quite often it the gearing that makes the most difference. And the fact that the horsepower needed to overcome drag is dependent on CdA and Velocity, not bhp or weight. So the 7's fairly low power (despite huge power to weight) is also a problem.
162mph....seems interesting.
Edited by PurpleMeanie on Saturday 11th April 17:36
PurpleMeanie]oaster said:
You may find the this document interesting it confirms the 7 is an aero dynamic Brick
/quote]
Well, sort of. Whilst it isn't all that great in Cd (OK, it is awful), what really matters is CdA. So it might be a bit bricky, it is a small brick rather than a wall
Motorbikes have a Cd around the same as a 7, but they are even smaller in frontal area.
Quite often it the gearing that makes the most difference. And the fact that the horsepower needed to overcome drag is dependent on CdA and Velocity, not bhp or weight. So the 7's fairly low power (despite huge power to weight) is also a problem.
162mph....seems interesting.
I seem to remember that the CSR was rated at 155 was it not/quote]
Well, sort of. Whilst it isn't all that great in Cd (OK, it is awful), what really matters is CdA. So it might be a bit bricky, it is a small brick rather than a wall
Motorbikes have a Cd around the same as a 7, but they are even smaller in frontal area.
Quite often it the gearing that makes the most difference. And the fact that the horsepower needed to overcome drag is dependent on CdA and Velocity, not bhp or weight. So the 7's fairly low power (despite huge power to weight) is also a problem.
162mph....seems interesting.
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