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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 10-03-2012, 02:58 AM   #1
Beamer Creamer
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Top speed of stock m3?

Wondering what max speed is roughly on stock e46 m3 with governor off? 6spd. I think i figured it out to be 200mph at around 7400 rpm but i know it cant get there stock. And where can i find factory looking cluster that will go to atleast 200 mph?
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Old 10-03-2012, 02:59 AM   #2
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Old 10-03-2012, 03:01 AM   #3
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It's around 175 without the governor IIRC. you'd need a lot of road to hit that though.
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Old 10-03-2012, 03:56 AM   #4
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Hypathetically i hit 168 lots( just kidding). And i believe its a 200 mph car just want to make sure i get enuff power to do it safer for engine. Rather not hold at over 7000 for 20 mins , be alot easier to get there quick then let off. Its hard to tell for sure what hp but the stock gears will do it. Its just i think all the cars that are rated as 200 mph cars i know are alot faster. I think they must be rating them in 1 mile drag? My mazda millenia s 4 door v6 i used to have could hit 150 but of course not in a mile. Are all book times for 1 mile? Im sure lambo lp560-4 can go more than the 202 mph its top speed is sup to be

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Old 10-03-2012, 05:48 AM   #5
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Quote:
Originally Posted by TerraPhantm View Post
It's around 175 without the governor IIRC. you'd need a lot of road to hit that though.
This is accurate. A stock M3, with the governer removed will hit about 175 - give or take. At that speed everything becomes a factor, humidity, ambient air temperature, road surface, tire tread, ect. I do not believe a stock M3 will do 200 MPH unless it is on a dyno where wind resistance is no longer an issue.
On a side note, I would shift the priority to acceleration, not the top speed. Acceleration is something you can do every time you hit an on ramp where top speed is pretty much just useful for ending up in a pine box.
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Old 10-03-2012, 06:39 AM   #6
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I've hit 175mph in my 6MT in "Mexico" with just an intake and Y rated tires. It was an experience for sure, i don't think i'll ever do it again though. However, I don't understand how I surpassed 155mph when I've got no tune or "chip," i thought it was governed? i've been told that if i pass 155 in 5th gear then i can keep accelerating in 6th.. I don't remember how fast i was going when i shifted into 6 though.
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Old 10-03-2012, 07:27 AM   #7
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Oh. I know it wouldnt do 200 stock i just wondered what it will do. Im sure 175 would be easy enough. Im governed at 168 but thats pretty well 8000 rpm in 5th gear. It is startin to take awhile though. I think i saw a youtube video goin to 187 mph and seemed to pull like stock.So i figure should hit 200 with about 400 hp but i know alot comes into play at those speeds. I cant say how awesome it is railin corners at the edge of the pine box. Not approved by all but they say free country
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Old 10-03-2012, 07:35 AM   #8
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I raced in the Pinewood Derby when I was 9, but this Pine Box Derby sounds like a lot more fun.
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Old 10-03-2012, 07:36 AM   #9
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Hahaha. Yep good times but gotta have eyes up
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Old 10-03-2012, 09:12 AM   #10
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The only way to figure out the unlimited top speed would be to take your car to a track with at least a 5 mile straightaway and accurate electronic instrumentation (sorry, but our speedometers are not accurate). My guess would be that you will see between 160 and 168 mph. As far as claims of 175 mph go, I take them with a grain of salt, especially considering that the old Ferrari 365 GTB-4 "Daytona" coupe had a tested top speed of 173 mph, was lighter than our M3's and had more than 30 bhp more than we do. Even the Lamborghini Miura SV wouldn't do 175.
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Old 10-03-2012, 09:38 AM   #11
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There are " places" in canada more than 5 miles straight and if you come out of a curve at 150 mph it would be easy to find out. Speedos are pretty accurate i think. If you drive your car in 6th at say 2000 rpm and look at speed then times by 4 should give around 8000 rpm if it was possible. I find it really close in 5th reading speedo at 4000 rpm and times 2 for 8000. I know its not as good as a gtech pro on anything but differentials always turn same revolutions right? And the top speeds on the cars your talkin bout either wasnt long enuff track, bad dyno results like lots of lies in the old one way or the other, drivetrain losses etc.

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Old 10-03-2012, 10:40 AM   #12
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Manufacturers build in a certain amount of speedometer error as a matter of course (almost always on the optimistic side), and an indicated 60 mph is likely to be closer to an actual 58 mph. Moreover, as tire tread wears down, tire circumference decreases. This adds to the error.

The cars I am talking about were tested by Road & Track magazine, and not on a track. Prior to the imposition of the nationally mandated speed limit of 55 mph on the highway (since repealed) in 1976, Nevada had no speed limits on its open highways, and the car magazines would take their cars to deserted desert highways to test actual top speed. Horsepower ratings for these cars were SAE net, just like they are today.

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Old 10-03-2012, 11:28 AM   #13
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Ok. Thanks. But i would say then that when near freezing temp in saskatchewan car should go fast enough to make up for the diff in nevada. Or would the wind drag of denser air make more diff than the combustion
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Old 10-03-2012, 02:05 PM   #14
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Lol @ you saying out speedos are accurate. OP, are you even going to top out your car? From what you're saying it seems like you are going to do this on a public road.
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Old 10-03-2012, 02:17 PM   #15
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Oh, so he is a retard.

Got it.

Moving on to closing this thread.
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Old 10-03-2012, 02:28 PM   #16
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Dude you have no idea what you're talking about. Everyone is telling you ~175. You can't just add another 25 mph on that. You can have 897hp I don't care. You're still limited with stock gearing.
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