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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 05-18-2012, 01:23 AM   #1
Alexandrle330ci
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Speed limiter removed? How to check!??!

Ok before you state the obvious(dyno test, or take it on a straight away) let me say, I have a 2001 330ci and I have read that these are limited to 128, correct? Well a few days ago I was on a clear straight of highway and got her up there, she sailed right past the 128 mark, and was still climbing strong, I have heard that your spedo will read around low end 130's because it's not accurate at those speeds? But, I reached about 143-145 on my spedo before slowing down due to coming up on traffic. So I'm thinking the limiter was removed. But I wanted to see if y'all knew a way to check manually? Just to fulfill my curiosity. Thanks!
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Old 05-18-2012, 01:28 AM   #2
fastjasonbmw
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BMW speedometers have a 10% error built in, so your 143mph is actually closer to 129mph.

You may be able to get a better speed reading from a very accurate GPS device.
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Old 05-18-2012, 01:38 AM   #3
Alexandrle330ci
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Originally Posted by fastjasonbmw View Post
BMW speedometers have a 10% error built in, so your 143mph is actually closer to 129mph.

You may be able to get a better speed reading from a very accurate GPS device.
But either way that's still over 128 hahaha. No but seriously. Why do they have that built in? What's the purpose?
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Old 05-18-2012, 01:47 AM   #4
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I always thought the sports package cars had the limiter set at 150/155
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Old 05-18-2012, 01:50 AM   #5
Alexandrle330ci
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Originally Posted by peytonracer4 View Post
I always thought the sports package cars had the limiter set at 150/155
My friends e90 sport is limited to 155. I've heard all e46's excluding ///M's are at 128.
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Old 05-18-2012, 02:01 AM   #6
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Originally Posted by fastjasonbmw View Post
BMW speedometers have a 10% error built in, so your 143mph is actually closer to 129mph.

You may be able to get a better speed reading from a very accurate GPS device.
This isn't extremely accurate. I took the MPH reading from GPS in my old e46 at 120mph on the speedo, and the GPS read 118mph. Not 10%, but not spot on either.
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Old 05-18-2012, 02:01 AM   #7
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Mine was/is a sport package, and my limiter would kick in right around 140 indicated fr me. With the tune i did get it just north of 155 but that was obv. After I got the limiter removed,
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Old 05-18-2012, 02:04 AM   #8
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But either way that's still over 128 hahaha. No but seriously. Why do they have that built in? What's the purpose?
lawyers, tire wear, tire size & less speeding tickets.

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Old 05-18-2012, 02:11 AM   #9
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This isn't extremely accurate. I took the MPH reading from GPS in my old e46 at 120mph on the speedo, and the GPS read 118mph. Not 10%, but not spot on either.
Yeah but alot of gps' aren't super accurate either. You really need a military spec gps. Or have a laser clock your speed.

Either way who cares, unless its a racecar.
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Old 05-18-2012, 02:15 AM   #10
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Yeah but alot of gps' aren't super accurate either. You really need a military spec gps. Or have a laser clock your speed.

Either way who cares, unless its a racecar.
Stock E46 = racecar, duh.
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Old 05-18-2012, 02:24 AM   #11
Alexandrle330ci
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I just kept going up and up and I was in shock because I thought it would have stopped at 128 or so. But no indicator light or anything came on? I don't even know what it does when it hits the limiter. Apparently I didn't reach it if I had one
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Old 05-18-2012, 12:15 PM   #12
lejeunebimmer
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It hits it at about 5.5k in 5th if I remember correctly.

No lights or anything common, it's just similar to hitting the rev limiter, it cuts fuel for about a sec, every few secs.
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Old 05-19-2012, 03:32 AM   #13
Alexandrle330ci
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Well hmm. Mine was still going strong. I guess I have to dyno it
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Old 05-21-2012, 11:40 PM   #14
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My friends e90 sport is limited to 155. I've heard all e46's excluding ///M's are at 128.
ZHPs and euro models are also limited to 155
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Old 05-22-2012, 01:01 AM   #15
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mines at 128 can't wait for shark
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Old 05-25-2012, 09:18 PM   #16
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Its always been my assumption that speed limiters were set to the max speed of the OE tire. I'd say non sports came with H rated tires that are limited to 130ish and sports came with V rated tires that were good to 149. M cars came with Z tires so those cars were limited to 155 regardless because of the Germans self imposed 155MPH agreement. That's just my take on it though.
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