top speed
Turbo Mini Forums

What do you reckon the fast top speed in a mini is?

Has anyone attempted a record?



Yes, I have been watching 5th Gear lol

Alex

AlexF

I missed it :(

Aparently Rods saph was on there? Do you know when it's repeated?

I reckon you'll pull 140 with enough power - much after that and you'll have your windsreen in your chest however!!!!!

Hey - good discussion starter AF!

Edited by TurboDave16V on 7th Nov, 2005.

I had my last one up to 100mph. Doubt that's a top speed, but gives somewhere to start! :)

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1967 Cooper 's' Turbo build @ www.drjing.com

i knew a guy who claimed that he had 125 and said it was almost undriveable as the tyres were so thin and there's so many holes for air to get in.

I guess the 16v guys would be able to give you a good idea of top speed as most of them run 5 speed box's from vauxhalls and hondas.

That Fifth Gear was sooo cool. I would love a Lotus Esprit, a dream since i was a little boy. Not to mention the fact that i live two miles from the Lotus Factory since i was small!

Good topic, i have always wonered about sticking a 2.7 or 2.9 FD in and inviting myself along to Bruntingthorpe with retro mag to do the test.

I ran a 3.1 at Combe this year and that was very quick flat out, unfortunatly my battery had gone on my digital speedo.

AlexF

yes 5th gear was cool.

i agree with Dave 140 shouldn't be a problem but a 2.7 diff would be needed unless you have a revver of an engine.

I run a 2.9 as we no, and at speeds of 120+ a tad it still feels very safe and stable, i just don't go much more as if your ever going to melt any thing, it will be on the high speed passes and i don't have the cash to rebuild, but i to have wondered.

Edited by Miniwilliams on 7th Nov, 2005.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

don`t feel so bad after watching that .. i took the mini round there in 57 secs .. with traffic on the trck

Everyone knows that instructions only have to be read if the thing doesn't work....

140 ish sounds about right.
130 on a runway is a piece of piss.

but the same speed on a motorway gets scary..i would guess .

Think you need lots more power than i have to go quicker, law of diminishing returns or summat!

Here for the craic..

Supercharged Arden powered

2lt and 16v helps too

Everyone knows that instructions only have to be read if the thing doesn't work....

for those who want to see again- the repeat is on tonite at about 11 - 11.30 ish!

I liked the beardy felllas quote on 5th Gear.

"So, Tiff, you got beaten by a guy doing 206mph wearing a cardigan and driving with one hand on the steering wheel"

hahaha.

My mini is flat out at around 100mph.

Wil

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

i once had 117 when the 1380 was NA and it was a hottish day along the flat but it was straight after a rr session but sometimes it would struggle to hit 110, thats on a 2.9 diff.

funny enough i awlays back off the turbo when i hit 5500 rpm so i would nt no now.

trouble with the mini is the aerodynamics of a brick doesnt help. lol

always looking for them bigger bunches of bannanas

in my turbo, the highest i drove mine was 110 (checked by GPS) it would have gone more but i didnt want to rev it any higher!

Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
Previous engine: STD metro turbo, megajolt
Drives: 399bananahp (flywheel) Honda Civic Vtec b18c4 T28 Turbo 1968 Mini

Megajolt maps to download: http://www.jamesfawcett.co.uk/cms/index.ph...&gid=3&Itemid=3

Have a read through this. Find the frontal area and drad of a mini (must be around somwhere) plug in the numbers and see what the theory says

http://www.pumaracing.co.uk/topspeed.htm

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

had my spi up to 95 briefly, i felt like there was definatley more to come but i am reluctant to got tooo fast on the public road, i worked hard for my liscence i dont want to lose it!

Didnt one of the marcos in the 60s hit 140 mph down one of the straights at le mans ?, I seem to remember reading it somewhere recently.

OK, bit bored so I have done a bit of hunting around and come up with this

Fd = Cd x 0.5 x rho x A x V-squared

P = Fd x V

Where:
* P = Power (in Watts) required to overcome the air resistance.
* Fd = The drag force (in Newtons)
* Cd = Coefficient of drag (Lots of figures quoted, I'm going for 0.5)
* rho = Density of the air (about 1.22 kg/cu.m - depending on temperature, pressure, and humitidy)
* A = Frontal area in sq.m. (about 2.0 sq.m I have no data, if you have any correct me please).
* V = Forward speed in m/sec

And when I plumb in the figures that I have got I get very odd results, indicating that my drag and frontal area figures are rubbish.

Results:
To do 100mph you only need 73bhp (this seems low to me)
To do 120mph you need 126bhp
To do 140mph you need 200bhp
and to do 150mph you need 246bhp

This is of course assuming that the car is geared to the max speed at the max power of the engine.

I reckon that if I can get some reasonable figures for frontal area and drag then it might give some useful info. Unfortunately no two minis are the same.....

Ben

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

I seem to have forgotten to include the drag of the wheels, i.e rolling resistance. If you add this to the above then it should make more sence. No idea how to get a figure for this though

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

a 1275 mini will do about 70bhp and about 100mph....


Alex

AlexF

So perhaps my figures are close. I should piont out that the BHP figure has to be at the wheels, for obvious reasons.

Anyway, a rough approximation power needed to overcome rolling resistance is:

weight x 0.013 x mph / 375 (don't ask me why)
So adding this to the final power required:

To do 100mph you only need 78bhp
To do 120mph you need 132bhp
To do 140mph you need 207bhp
and to do 150mph you need 254bhp

This is of course all theory and assumes no wind and a flat surface.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

so who's up for a little top speed action next year?!

I will be!!

Alex

AlexF

Edited by Richie on 8th Nov, 2005.

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