200 mph E30 Touring

[Y_Cymro]

I'm still interested to know what cars have 3x the drag coefficient of an e30.

F1

[tomtomtom]

Go for the crate option if you want cheap low-stress non-BWM power (in a straight line)!

http://enginefactory.com/572750hp.htm - £7,700+shipping/tax = 750bhp / 775ft/lb 9.4L naturally aspirated, brand new turnkey engine!

Adding 5.5psi of "lazy" boost takes you over 1,000bhp (simplistically) with 1 or 4 truck turbos for the added welly if you need it, should be fine on standard compression....?

i agree and with turbo and NOS i reckon it would crack 200 but would it really be a BM?

[keri-WMS]

i agree and with turbo and NOS i reckon it would crack 200 but would it really be a BM?

Hmmm, staying BMW. What about this 3,950bhp BMW lump?

83.5L, 4,130kg 4-row radial!

[RodentRacing]

I'm still interested to know what cars have 3x the drag coefficient of an e30.

F1

Sure, an F1 car with a Monaco aero set up. I think the implication in Shakey's post was there are road cars with 3x the drag by 1.5x the downforce. NB I'm not saying an e30 creates any downforce, that was Shakey. There are a handful of road cars that jump out at me as probably having very high drag coefficients. None in the 3 x e30 range though.

[ShakeyC]

Try a Hummer, Jeep or Land Rovers if you got them going fast enough 100mph+ they would have 3x more drag and in the process 1.5x more downforce than an E30

To clarify i ment fast car as in sports cars/coupe shaped. The E30 shape as with many saloon body shapes create lift (without spoilers or aero tweeked bodykits) an estate shape as in Touring models will be more stable at higher speeds again without bodykits or spoilers taken into account. Basically drag is created from back end of the car, lift by the roof line and the major frontal drag comes within the engine bay not infront of the bumper as many people mistakenly assume.

The brick was a joke hence the crying smilie face.

[RodentRacing]

You are joking aren't you Shakey?

[ShakeyC]

RodentRacing take it as you will, I never claim I know everything about anything

ps. edited 1st line missed out some words

[RodentRacing]

Not meaning to have a go Shakey, just demonstrating that not everything you read on the internet is necessarily true.

Anyway, why don't you want a red 318iS? They go a lovely shade of pink given a few sunny days

[ShakeyC]

Its ok Rodent info was not from the internet most of its rubbish from what i just googled. Im no aero physicist but do have some hands on experience to share, if you disagree fair enough no bother to me will keep to myself.

Red proven to be a seriously unlucky colour for me and besides not fancy driving a metrosexual coloured car around town

[Bananaman]

the major frontal drag comes within the engine bay not infront of the bumper as many people mistakenly assume.

How true, Every raves about the calibra's drag coefficient but different models with the same body had different Cd.

The eight valve model was, however, the most aerodynamically efficient Opel ever, with a Cd of 0.26. All later 16V, V6, 4x4, turbo models had a worse Cd of 0.29 due to changes in cooling system, underbody, use of spoked wheels and glass detail.

[RodentRacing]

Red proven to be a seriously unlucky colour for me and besides not fancy driving a metrosexual coloured car around town

lol there's nowt wrong with metrosexual pink, all the cool kids are wearing it.

[Demlotcrew]

Flat under side will be required,

sounds like fun.

Theres alot more in making a flat underside to work than you might first think!

A

[hammoj28]

Was reading through an older Performance BMW mag today and stumbled across a certain e30 turbo with 1137bhp. I looked in the specs and they reckon it does 208mph. It doesn't say its an estimate beside it either.

Car does a 1/4 mile in 9.78 seconds at 153mph.

Heres the site for the car:

http://www.limmet.se/index2.htm

[dannyboy759]

you ll never do it!!!! ive seen some seriously quick cars struggle to break the 200mph barrier.
Unless youve got 10,000´s of pounds to spend i really dont think you will stand a chance, certain things are against you from the start, but good luck, id like to se it done

[fuzzy]

if 1100bhp is the region of power required to do it as per hammo's link i cant see it happening either.

[Dave_M3]

Haha, only the Scandinavians would be mad enough to pull it off
Good luck, it'll be great to see the results

[AlexBaur325]

Veyron numbers...

155 mph needs 270bhp but to do the leap to 253mph needs another 730bhp

[fuzzy]

a guy ,rod that has the first 200+mph cossie also said in a post that the amount of power rquired to get from say 170 to over 200 rises disproportionately the faster you get.

[keri-WMS]

a guy ,rod that has the first 200+mph cossie also said in a post that the amount of power rquired to get from say 170 to over 200 rises disproportionately the faster you get.

Yup, if you double the speed of an object the drag increases by a factor of four (x4 the force), but doing the work in half the time means 8x the power.

So you could say as a guide:
12.5hp=50mph
100hp=100mph
800bhp=200mph
6,400bhp=400mph

Plot that on a graph and you can see it gets very steep, very quickly, just when you are getting close (to any given speed you are struggling to reach is my point).

[Blitz]

Cant the E60 M5 and Alpina B5s crack 200MPH+?

[DHFiS]

I still think the aerodynamic properties are the key. A Cessna 350 light aircraft with only 310 bhp will get over 200 mph in level flight because its the right shape.

Another issue is crash survivability. If you want a good chance of living after a crash at 200 then there is lots of expensive testing needed, if you aren't too bothered about survival things are a bit easier.

[handpaper]

OK, here's my guess
The ratio between power and speed is a cube - to double your speed you need 2x2x2 x more power.
A standard 325i has 168 bhp and will do 128 mph.
So, 200 mph / 128 is 1.57; 1.57 cubed is 3.81; 3.81 x 168bhp is 640 bhp. Easy, isn't it?

Now all we need is to keep it on the ground and in one piece......

[miniblob]

Surely it's not quite that straightforward though? Gearing must come into it somewhere too??

An 850CSi has 380bhp, weighs 2 tonnes and will hit 180mph!! Although it's obviously massively more aerodynamic.

I'm tired and confused!!! Must be home time soon!!!

[Morat]

As I'm sure has been said before (maybe in this thread) weight is a big factor in acceleration but not top speed. Power and Drag are the important things if you are solely concerned with top end. Big power will get you a long way, but I would guess that at some point the cost of improving the aerodynamics is going to be become less than dragging out that next 100bhp. I can't see much point in lightening the car if you need 1000bhp+ to overcome the drag then the power to weight ratio will still be pretty awesome even if you're four up

[DHFiS]

If the car starts lifting then no matter how much power there is its not going to go on accelerating. controlling the airflow over the surfaces of the car is critical IMO

[tha_lick]

you think maybe Nitro boost would be a good idea?

[AlexBaur325]

this does 200.....

[Blitz]

this does 200.....

That is ugly.