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      05-11-2011, 12:24 PM   #23
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doesn't the speedo read high in virtually every car? I always look at the discrepancy when I drive by speed radars at the side of the road, and 5% - 6% is usually what I observe. Not just in BMW's but nearly every car. I have owned at least one Jeep, Chevy, Land Rover, Jaguar, Porsche, and BMW, and all of them have speedos that read higher than radar-indicated speeds. It's obvious why manufacturers would err on that side - makes you think you're going faster than you really are, which reduces tickets, makes your ==D feel bigger and gives you more to brag about.
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      05-11-2011, 12:44 PM   #24
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Quote:
Originally Posted by Seattle S65B40 View Post
HOLY SMOKES! anything over 270km/h is super fast. I think this car's top speed is around 200 mph - don't think it's accurate if it's anything higher than that.

That video is pretty cool, btw. Testament to engine quality. Can sustain 8000 RPMs for very long periods of time. Surprised people on here were telling me sustained high revs are bad for the engine. What would those people call this then??
It depends on how long to maintain high revs. I had two years business E92 M3 and a half years ago I changed the engine, because it was exploited as a prostitute. But it has 180 000km course.

As for measurements, I do not know if I should be guided by a very good GPS that can, however, the dynamometer. Speedo removed. As mentioned above the highway was not inclined, and during the break I don't felt the wind.
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      05-11-2011, 03:14 PM   #25
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Quote:
Originally Posted by EddieGTRS View Post
It depends on how long to maintain high revs. I had two years business E92 M3 and a half years ago I changed the engine, because it was exploited as a prostitute. But it has 180 000km course.

As for measurements, I do not know if I should be guided by a very good GPS that can, however, the dynamometer. Speedo removed. As mentioned above the highway was not inclined, and during the break I don't felt the wind.

What mods you have on your car, how did you get to 460hp and 434nm?
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      05-11-2011, 03:21 PM   #26
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Quote:
Originally Posted by besiktas View Post
What mods you have on your car, how did you get to 460hp and 434nm?

No, no. 460HP is from this movie and it isn't recorded by myself and it isn't my car, but below is written (in the tags) it's chip tune. I don't know what's the tourqe.

Main has 456HP and 434Nm. I refueling 100-octan fuel - it gives me a little more power.
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      05-11-2011, 05:04 PM   #27
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dziwka...

Eddie,

after reading your posts both myself & another Polak buddy here in southern california can't stop laughing...

"...I had two years business E92 M3 and a half years ago I changed the engine, because it was exploited as a prostitute"

Only a fellow countryman would phrase it so eloquently
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      05-12-2011, 12:21 AM   #28
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Quote:
Originally Posted by ///M Rakete View Post
Yesterday on the A1 (in Germany) I drove a DCT M3 and it was limited to 272 kph or 170 mph. This was even true on a downhill stretch.

And, yes, it was rather fast.

Now I'm sure the speedometer has some error, but we didn't have any way of getting a true ground speed.
I've hit the same speeds numerous times before the limiter kicked in...the car definitely had more.
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      05-12-2011, 03:34 AM   #29
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Quote:
Originally Posted by EddieGTRS View Post
Not 220mph. 211mph / 340km/h on speedometer.

I refueling 100-octane fuel, this makes the engine produces more power and tourqe. I have 456HP and 434Nm. I've seen 2 vids with others M3s: G-Power SK-I (525HP) and G-Power SK-II (600HP). Both cars hit top speed like main - speedo: 340 km/h and 8,000 rpm)... Why not 8,400? Error?
Holy sh*t... what if you sneeze while going that fast & the car starts going sideways
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      05-12-2011, 04:50 AM   #30
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Quote:
Originally Posted by OC3 View Post
Holy sh*t... what if you sneeze while going that fast & the car starts going sideways
European M3 come with a sneeze guard.
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      05-15-2011, 12:10 PM   #31
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I hit 321 km/h a couple of times in my car, its stock and was on 95 octane. I have the M Drivers pack. The best I ever managed was 324 km/h but felt like I was redlining the car and slowed down.
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      07-11-2011, 09:48 AM   #32
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Quote:
Originally Posted by EddieGTRS View Post
In Europe is 95/98/100 octane fuel - The higher the octane number fuel, the greater power and torque.
Higher octane causes the fuel to be able to be compressed more without ignition. This means that higher compression ratio engines require higher octane. The amount of energy stored in the fuel is not changing. You simply can compress more fuel into a smaller space before it goes BOOM.

(sorry, people's claim that higher octane gives you more power is a pet peeve of mine)

Nice video btw!
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      07-11-2011, 10:25 AM   #33
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I just can't believe it. My e92m3 hit 270km/h limit a few times, the car were struggling already, I know it could probably touch 300km/h but no way 320km/h.
We have cross country drive every 3 months, there are usually 30-40 super cars running together. Only a few of the lambo lp560, lp570, scuderia went past 330km/h, and it was always a big deal. Non of the ferrari 430 has gone over 320km/h.
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      07-11-2011, 02:08 PM   #34
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Quote:
Originally Posted by EddieGTRS View Post
Don't fotget!
Highway (at night):
Speedo: 340 km/h / 8.000
You should edit the rpm to at least 8.600 rpm (see your video). That means you also removed the engine rev limiter; you're a brave man. That overrev stays permanently recorded in the DME; hope you never have engine problems .

Quote:
Originally Posted by Seattle S65B40 View Post
Surprised people on here were telling me sustained high revs are bad for the engine.
Bad in the long run, especially above the factory 8,400 rpm rev limit. And keep in mind it's different to run up to redline in lower gears than sustained rpm at the limit (and beyond in this case). I wouldn't buy the OP's car . Good day.
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      07-11-2011, 02:25 PM   #35
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Did you have a (massive) tail wind? Overcoming the drag to get to 200 is going to take a lot more than 450hp. I thought Pencil Geek proved all this out with a model of his that showed about 190 as the theoretical top speed - anybody else remember that?
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      07-11-2011, 04:02 PM   #36
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Quote:
Originally Posted by signes View Post
Did you have a (massive) tail wind? Overcoming the drag to get to 200 is going to take a lot more than 450hp. I thought Pencil Geek proved all this out with a model of his that showed about 190 as the theoretical top speed - anybody else remember that?
I don't think so, but I don't know.

Quote:
Originally Posted by elp_jc View Post
You should edit the rpm to at least 8.600 rpm (see your video). That means you also removed the engine rev limiter; you're a brave man. That overrev stays permanently recorded in the DME; hope you never have engine problems .
1. It isn't my vid

2. That vid shows 8,500 rpm. I did it by 6MT and 8,000 by DCT. Both stock, 100 octane fuel, 340 km/h.

3. Take a look at DCT G-Power, it has this same max speed and rev.
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      07-11-2011, 04:11 PM   #37
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On the way to Button Willow over the weekend, I had to stop to take a piss so I fell behind the caravan

To catch up, I had to go fast... really fast. Speedo red 185mph top, steady at 175 for most of it. It was a bit of a decline. I have an OE tune and I'm pretty positive Jeremy removed my electronic limiter

I know it's not GPS true speed.
I honestly wasn't looking at my RPM as I was looking ahead...
Car was extremely extremely stable.

Much more stable than my 335i was when I hit about 160 in it (speedo speed).
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      07-11-2011, 04:17 PM   #38
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I created this topic for one reason: what's the true top speed when speedo shows 340 km/h, dyno 320km/h, GPS 310km/h?
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      07-11-2011, 04:17 PM   #39
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redlined gear 7 and v= showed 206. rev limiter raised to 8600
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      07-11-2011, 04:18 PM   #40
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Quote:
Originally Posted by EddieGTRS View Post
I created this topic for one reason: what's the true top speed when speedo shows 340 km/h, dyno 320km/h, GPS 310km/h?
based on my post above, lets say 5% correction factor of 206 gives u roughly 195-196 true sped
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      07-11-2011, 05:04 PM   #41
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Quote:
Originally Posted by persian54 View Post
I have an OE tune and I'm pretty positive Jeremy removed my electronic limiter
No doubt; it stops the party at 167 indicated, which is exactly the 270 kmh advertised top speed.

Actual speed depends on wheel size, tire size, tire brand, and tire pressures. Remember M3s come standard with 18" wheels, and speedo is calibrated to that. Optional 19s are as closely sized to the 18s as possible, but are a bit smaller, increasing speedo error. My speedo error is right at 5%, which is quite high, but BMW is known to be the worst, including bikes.

Therefore, if you're using stock tires inflated at the recommended pressure (41 psi for those speeds), error would be roughly 5%, so 340 km/h means around 201 mph. Having said that, I find extremely hard to believe that 460HP can yield 200+ mph on the not-very-aerodynamic M3. That's exactly the top speed of the Ferrari 458, which is much more aerodynamic, and has 570 HP. Something doesn't add up. Good day gang.
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      07-12-2011, 08:35 AM   #42
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I had a little discussion with a few driving buddy today, there's no way a stock M3 can go beyond 310kmh. 300 maybe. One guy has a 996GT2, his car stop dead at 311kmh, he floored it for few more km but it won't go 1 km faster. base on our cross country driving experience, only a few v12's made it to 320kmh 599, lp650, lp 570(v10)...
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      07-12-2011, 09:30 AM   #43
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Quote:
Originally Posted by elp_jc View Post
No doubt; it stops the party at 167 indicated, which is exactly the 270 kmh advertised top speed.

Actual speed depends on wheel size, tire size, tire brand, and tire pressures. Remember M3s come standard with 18" wheels, and speedo is calibrated to that. Optional 19s are as closely sized to the 18s as possible, but are a bit smaller, increasing speedo error. My speedo error is right at 5%, which is quite high, but BMW is known to be the worst, including bikes.

Therefore, if you're using stock tires inflated at the recommended pressure (41 psi for those speeds), error would be roughly 5%, so 340 km/h means around 201 mph. Having said that, I find extremely hard to believe that 460HP can yield 200+ mph on the not-very-aerodynamic M3. That's exactly the top speed of the Ferrari 458, which is much more aerodynamic, and has 570 HP. Something doesn't add up. Good day gang.
This debate persists, but I don't understand why. There are plenty of folks (and a few with video back-up) that have gone over 200 MPH in DCT's. This was indicated by their speedo's reading over 211 MPH and their GPS/VBox reading between 201 and 203 MPH. One person achieved 206 MPH on a stock (ie. no forced induction) DCT (not sure on the fuel octane) as measured by the VBox mounted in his car.

To the OP, I'd go with the 340KmH *0.95, or 323 KmH (201 MPH). The videos that I have seen showing a VBox reading and the speedo reading have all had a speedo error of between 4% and 5%.
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      07-12-2011, 10:47 AM   #44
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Quote:
Originally Posted by EddieGTRS View Post
Hey guys,

I need your help/opinion. I drive M3 E92 DCT. For a long time I wanted to check what's the top speed. The results:

Highway (at night):
Speedo: 340 km/h / 8.000 rpm
GPS: 310 km/h / 8.000 rpm

Dyno: 320 km/h / 8.000 rpm

Which is closest to the correct result?
I think dyno, but haven't sure. What's your opinion?
I did 200mph on the speedo but the actual trap read 190mph and I had some more left but I was scared as I had a blister on my rear tyre. Just to clarify this was done on a runway which had a speed trap after 2 miles.
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