Maximum speed reached by 996 Carrera 4S vs BMW M3

[Preatorian86]

I have a tuned Carrera 4S 996 type. Before tuning it was 320 HP as standart and i reache 297 km/h and still have some rpm. After tuning it became exactly 394 HP and i reached 311 km/h and still have some rpm.
I dont know what will be top speeds of after tuning and before tuning.

And also i dont know BMW M3 without limitor what will be top speed. I heard that a test driver reached 275 km/h.
Anybody knows??? ;)

[Preatorian86]

Which one is faster for acceleration and max speed??
I have an C4S 996 a tuned one. Before tuning it was 320 hp and i reached 297 km/h and still i has rpm to go more. After tuning it became 394 hp and i reached 311 km/h.
But i dont know its 0-100 km/h after tuning??

BMW M3 is 3200cc 343 HP i dont think that car is faster than a porsche :-) !!

[Egg Nog]

These threads are now merged :)

Any photos of your car?

How do you know it's exactly 394hp? How was it measured? 394 at the wheels means that there's been a much larger gain at the crank, especially in the case of an AWD car.

[Preatorian86]

These threads are now merged :)

Any photos of your car?

How do you know it's exactly 394hp? How was it measured? 394 at the wheels means that there's been a much larger gain at the crank, especially in the case of an AWD car.

:) By stage 2 supercharger kit,headers and last sport exhaust system.
i have photos i tried to attach photos but system said that file is too large to attach. The technicians said that they mesaured it exactly 394 HP. But i felt the change in acceleration and top speed.

You must know the 4S' all braking system is same as 420HP 911 Turbo. They are the same car except the HP and Turbo system

[KarateBoy]

I have a tuned Carrera 4S 996 type. Before tuning it was 320 HP as standart and i reache 297 km/h and still have some rpm. After tuning it became exactly 394 HP and i reached 311 km/h and still have some rpm.
I dont know what will be top speeds of after tuning and before tuning.

And also i dont know BMW M3 without limitor what will be top speed. I heard that a test driver reached 275 km/h.
Anybody knows??? ;)


Well from what i heard is that with the limiter it does 250km/b but without it, the M3 being the sexy machine it is can do 300+k/h prodably top off at 305-310. But you can easily (if you have the money) get it to 450+ Hp and make it about 320-ish Km/h which is fast and prodably won't be driving that fast too often but is fun to think about :)

[Egg Nog]

Well from what i heard is that with the limiter it does 250km/b but without it, the M3 being the sexy machine it is can do 300+k/h prodably top off at 305-310. But you can easily (if you have the money) get it to 450+ Hp and make it about 320-ish Km/h which is fast and prodably won't be driving that fast too often but is fun to think about :)

No, there's no way that an M3 could reach anywhere near as high as 305km/h or 310km/h. The M3, despite "being the sexy machine it is" is still governed by the same laws of physics as every other car on the road...


I'll do an objective analysis, using a standard C5 Chevy Corvette as a comparison:

M3 Final Gear Ratio: 0.828:1
M3 Drag Coefficient: 0.32
M3 Weight: 1570 kg
M3 Power/Torque: 333hp/269ft-lbs

C5 Final Gear Ratio: 0.50:1
C5 Drag Coefficient: .29
C5 Weight: 1457 kg
C5 Power/Torque: 350hp/375ft-lbs


Now, the C5 Vette essentially has every single factor that determines top speed in its favour, and its top speed is barely over 280km/h. This makes me doubt that the M3, without some heinously long gears, could even begin to approach the speeds that you claimed.

Wow, I liked that post :) ;)

[KarateBoy]

No, there's no way that an M3 could reach anywhere near as high as 305km/h or 310km/h. The M3, despite "being the sexy machine it is" is still governed by the same laws of physics as every other car on the road...


I'll do an objective analysis, using a standard C5 Chevy Corvette as a comparison:

M3 Final Gear Ratio: 0.828:1
M3 Drag Coefficient: 0.32
M3 Weight: 1570 kg
M3 Power/Torque: 333hp/269ft-lbs

C5 Final Gear Ratio: 0.50:1
C5 Drag Coefficient: .29
C5 Weight: 1457 kg
C5 Power/Torque: 350hp/375ft-lbs


Now, the C5 Vette essentially has every single factor that determines top speed in its favour, and its top speed is barely over 280km/h. This makes me doubt that the M3, without some heinously long gears, could even begin to approach the speeds that you claimed.

Wow, I liked that post :) ;)

Well that is what i have heard but i do think i can reach 280 definately i mean if its top was was 260ish there would be no use for the limiter since it would be only 10 km difference. and whaat do you mean by "This makes me doubt that the M3, without some heinously long gears" what long gears?

[Egg Nog]

Well that is what i have heard but i do think i can reach 280 definately i mean if its top was was 260ish there would be no use for the limiter since it would be only 10 km difference. and whaat do you mean by "This makes me doubt that the M3, without some heinously long gears" what long gears?

"Longer gears" refers to a higher gearing ratio... there's really nothing that's physically longer about them. Not sure where the term comes from. You can see that the Corvette has a higher gear ratio: 0.50:1 -vs- the M3's 0.828:1

For example, 1st gear is always the shortest gear, and top gear is always the longest gear. If you changed the gearing of the M3 so that sixth was much longer, you could acheive a higher top speed (without the limiter, of course).

[Preatorian86]

Honesty I do not know any knowledge about gear ratios but with my C4S a (5gear triptonic version) at 4 th gear i reached 275 km/h(standart C4S-264km/h at the last 4th gear) i tested it. so you said the longest gear is the last gear. I test it on a highway. 5th gear i reached 311km/h a little rpm is remaining. I was afraid to do more
I am not sure the M3 will go 305 km/h because its not a speed car like as porsches or ferraris. Its acceleration may be good but don't forget it is just a tuned BMW 3 serie :-))) :p

[Spastik_Roach]

Hey preatorian86, the M3 isn't jsut a tuned 3 series. Firstly, its a tuned 3 Series Coupe :D , and secondly its got a entirely unique engine to the rest of the 3 series. A BMW M3 GTR (racing version because the road GTR has to be tuned down for emissions etc) could probaly quite easily top 300kph.

http://homepage.mac.com/kazuosky/car/0112/m3gtr_street.jpg

[Preatorian86]

You are just talking about the M3 GTR not a standart M3. I just want to learn about the standrt M3's top speed.

[Spastik_Roach]

I know :D I just like to prove people wrong :D

[Swissbeatz]

A BMW M3 is faster than a Porsche 911 carrera. I own a 2003 Porsche carrera 4. I can affirm that a BMW E46 M3 is faster (with smg gearbox). The european version of the M3 has 343hp not 333 like tha ameican version. I got a friend who owns a M3 and it's faster than my car.
Without the limiter a M3 can reach 292km/h not 305. The e39 BMW M5 can reach 315km/h without the limiter. If you don't agree with that, ask your dealer and stop acting like you know all cars.

[Preatorian86]

My friend you own a carrera buy you are wrong. I reached 297 before tuning my 4S(320 HP) and it can go 305 minimum because there is more rpm. My friend has yours car and 300HP version of C4 they reach 302 km/h.. After tuning i reached 311 km/h(394 HP). and still have more to go.
SO HOW CAN İT BE A M3 BE FASTER THAN CARRERA. İT CAN 343 HP BUT İTS AEORDYNAMİC AND STABİLİTY İS NOT LİKE A CARRERA. CARRERA İS A SPEED CAR BUT M3 İS A STREET SPORT CAR. IN PHYSİCS İT CANT BE FASTER THAN CARRERA

[Egg Nog]

CARRERA İS A SPEED CAR BUT M3 İS A STREET SPORT CAR. IN PHYSİCS İT CANT BE FASTER THAN CARRERA

I proved my point by using actual concepts of phyisics. Why don't you give it a try?

[thinker]

what happens when u get to 155mph WITH the speed limiter?how do u get rid of the speed limiter on the m3?

[fpv_gtho]

No, there's no way that an M3 could reach anywhere near as high as 305km/h or 310km/h. The M3, despite "being the sexy machine it is" is still governed by the same laws of physics as every other car on the road...


I'll do an objective analysis, using a standard C5 Chevy Corvette as a comparison:

M3 Final Gear Ratio: 0.828:1
M3 Drag Coefficient: 0.32
M3 Weight: 1570 kg
M3 Power/Torque: 333hp/269ft-lbs

C5 Final Gear Ratio: 0.50:1
C5 Drag Coefficient: .29
C5 Weight: 1457 kg
C5 Power/Torque: 350hp/375ft-lbs


Now, the C5 Vette essentially has every single factor that determines top speed in its favour, and its top speed is barely over 280km/h. This makes me doubt that the M3, without some heinously long gears, could even begin to approach the speeds that you claimed.

Wow, I liked that post :) ;)


i think theres still more to this story, like engine power and torque. the HSV GTS's top speed is 271km/h in auto and 260km/h in manual. the thing is though the manual's 0.5:1 6th and 3.9:1 final would surely give a better theoretical speed than the auto's 3.45:1 final and 0.71:1 4th, but the manual in 6th is only good for about 240km/h.

i wouldnt be too surprised if that corvette achieved its 280km/h top speed in 5th, not 6th


wheels magazine again set out to find where exactly the limiter cuts in on the m3 and they managed to get the needle bouncing on the speedo at around 270km/h

[kiwitt]

This Puma Racing page[/u] (http://www.pumaracing.co.uk/topspeed.htm) and this Tool (http://www.quaife.co.uk/downloads/QSpeedCalc.exe) will give a good indication of possible top speeds.

[thinker]

hey fpv gtho, was that 270 kmph with or without the limiter

[fpv_gtho]

that was with the limiter. at the same time they had an M5 doing 260km/h

[thinker]

but almost everywhere says the limit is 250 kmph tho so thats wrong huh?

[fpv_gtho]

well the official claim is 155mph or 250km/h, but i dont think many people have actually purposely taken the cars to the limit and checked whether the limiter cuts in where BMW says it does. Perhaps though, those that have breached past where the limiter supposedly cuts in, have been urged to continue quoting 250mk/h by BMW themselves to keep the German government off their back

[thinker]

that could be tru...

[fpv_gtho]

well i dont know what the official story is, i just know that on occasion an E46 M3 has gone 270km/h without modifications. I'll have to see what speed my dad's E36 can get up to.....

[KnifeEdge_2K1]

Aight there is basically NO reason to check how fast an M3 can go without the limiter since if you do that it is no longer stock. You might as well ask what it will do if you add a turbo, nitrous, groud effects, tuned engine, ect.

The new M3 has 155 mph which is 250 kph. The 2004 m3 Coupe has the following specs

333 hp
262 lb-ft
.33 cd
final drive of 3.64:1
0.83 in VI gear

If you really wanted to you could go to http://www.geocities.com/CapeCanaveral/Lab/8679/evcalc.html
and find the theoretical Max speed with the proper values (there are ALOT so be warned)

One thing to keep in mind is that "Top Speed" is irrelevent. At NO time will a car EVER reach it's theoretical "Top Speed". Since there are infinite number of variables which affect the car each experimental top speed will be different. Even 2 factory M3s with teh same millage same amount of gas in the tank and same driver under exact same conditions will perform differently, hell, the same car will perform different than itself in the same conditions since there is always a random unknown variable. Most people look at strait up values like max power torque, 0-60 tiems and such. Many however overlook the power and torque curves of an engine. The type of suspension it has. Even the "feel" of a car can affect how someone will drive it since a "nervous" car will cause the driver to perform badly.