Will this really do this speed ?
http://cgi.ebay.co.uk/mk-indy-fireblade_W0QQitemZ4644724688QQcategoryZ29750QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
NEVER!!!
It's got the aerodynamicy of an old womans shopping trolley!!!
Theoritically it could probably attain that top speed with the correct gearing - but in reality it just cant...
Happy to be proven incorrect - but my estimation is about 120-130mph top-end...
And no chance with him sitting in it 
[Edited on 1/6/06 by muzchap]
Not a chance
The speedo might say that, but a gatso wouldn't comfirm it 
Most blade engined Indy's top out at about 130 due to gearing, He might have
got round this with a special diff, but a blade lump wouldn't usualy give out the needed umph to go that fast
Nice car though
Jason
Thats what I thought, perhaps a tryping erior.
dream on!
cant be too light either with a full cage, reverse box and lsd!
350 miles in 2 years seems a terrible shame, i did that in the first week!
i persume that a zonda or ultima is towing it to get to that speed???
Yeh wright!!!!!!!!!!!!!!!!!
Perhaps he has a JATO kit for it? 
Perhaps he lives near a cliff.
Have i to take a look at it, it's not far from me.
But i can get over 190 mph on my speedo. Thats why ive got myself a speedo healer now.
even with a 3.14 dif i'd be suprised if it could pull that speed even on a rolling road without the aero problems to worry about.
highly unlikely on a rolling road - not a chance on the road.
Ned.
Who are you lot trying to kid. Everyone knows the Indy is the most aerodynamic of all the sevens. 160mph........... with a Blade engine? EASY. Ours
will do 220mph, the kid next door told me so..................
LOL.
it might be in with a chance, any kid knows red cars are faster.
Of course they are
I bet it wouldnt do a sub 4 sec 0-60 either!
richijenkin
I love your avatar!
not a chance. even with perfect gear ratios. particularly not from a blade.
that's gut feeling. if anyone can give me a rough guess at drag coeff and frontal area of a seven type car I'll happily work out how much
power you would need to get to 160mph.
the 0-60 is vaguely believable.
According to wikipedia, Cd for a caterham is 0.7. And I found a site listing frontal area as 1.47 m^2
I'd guess an MK has more frontal area with a pretty similar Cd.
I'd do the maths myself but in the 11 months since I finished studying Mech Eng I've forgotton everything
Nothing better to do!
Drag = 0.5 * Cd * Area *Air Density * Velocity^2
160mph = 72 m/s
Drag = 0.5 * 0.7 * 1.47 * 1.3 * 72^2
Drag = 3467N
Power = Force * Velocity = 3467 * 72 = 250kW
250kW = 335 BHP
For those who can't be arsed with the formulae and conversion factors, this is what it boils down to for a seven in BHP and MPH.
Approximately:
Power Required = 0.00008 * Velocity^3
And
Max Velocity = Cube root of (12500*Power)
Remember this is power at wheels, not engine power.
For my car (137bhp engine) this would give 120mph. I've managed about 105-110 so taking account of drivetrain losses this sounds about right.
[Edited on 2/6/06 by matt_claydon]
quote:
Originally posted by JoelP
dream on!
350 miles in 2 years seems a terrible shame, i did that in the first week!
I make it about 360bhp, but my calc includes a few more losses, such as:
- rolling resistance (I've borrowed values for a daewoo matiz)
- difference between engine test bed power (the 360bhp) and the power it produces under the bonnet with an exhaust on (estimated at 5% loss of
power)
- transmission losses (again estimated as 5% loss of power).
pretty highly tuned fireblade engine to put out 400bhp/litre! maybe he could teach some F1 teams how to build engines!
160mph on the rolling road is not the same!
[Edited on 2/6/06 by wildchild]
losses from crank to wheels are about 17-22% probably at the lower end for a bec. so 335rwhp means more like 405bhp at the crank.
and fireblade indy would be nearer to 115mph.
youd need at least a busa turbo running 580 at wheels to hit 160, holeshot racing have got one.