W211 AMG Discuss the W211 AMG's such as the E55 and the E63
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Anyone challenge the ecu speed limit?

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Old 01-12-2007, 09:43 PM
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Anyone challenge the ecu speed limit?

I had mentioned before that I had hit 160 on the E, but that was under full acceleration. I always knew (heard from Rob Allen) that the limiter is set to kick in, so you can actually go more than 155 if you accelerate through it. I figured that is why i hit 160 and still no cut off.
So, I'm out last night *on my private race track* and I creep up to see what the cut off feels like. I get to 150, no biggy. I hold it there a sec and start to creep....155, 156.....I hold it there and creep again....157, 158....run out of "track". So I never hit the cut off again!!
Does anyone have experience hitting it? What speed does it really come on at? Also, what does it feel like? Is it smooth? Just curious.
Old 01-12-2007, 10:48 PM
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not enough track on long island, but if you find someone in germany with an e55 il gladly go over and see if he can top it, im a matter of a few hours from ger now
Old 01-12-2007, 10:52 PM
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Cant help ya there Jang.The fastest Ive gone is 152,atleast thats what it said when I finally looked down at it.I might have been going faster but sisnt take a look at the speedo until I lifted.BTW,those Porsche Cayman guys get real mad when you do that to them,specially when they come asking for it.
Old 01-12-2007, 10:54 PM
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as you know, i hit 158. the vid is on youtube under E55 v. The ****in Limiter
Old 01-12-2007, 10:54 PM
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LOL at the Cayman. That is just a funny car to me. I won't say under powered, as i get slapped silly when i call a car underpowered since life is relative.


That's actually another thing I wondered. i was going by the digital readout on the dash. I wonder if my speedo is really calibrated right? was I really going 160 when it said it?
Old 01-12-2007, 10:56 PM
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Originally Posted by AMG_55
as you know, i hit 158. the vid is on youtube under E55 v. The ****in Limiter

That's right..I forgot about your run. Just so i don't have to dig up that thread, what did the biatch feel like when it cut off? Were you creeping up or straight accelerating?
Old 01-12-2007, 10:58 PM
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Originally Posted by jangy
LOL at the Cayman. That is just a funny car to me. I won't say under powered, as i get slapped silly when i call a car underpowered since life is relative.


That's actually another thing I wondered. i was going by the digital readout on the dash. I wonder if my speedo is really calibrated right? was I really going 160 when it said it?
I was using the digital dash as well.Not sure how accurate they are though.Either way 152 for me was good enough.I do know that from 40mph up to 152 I can put abut 20 cars on a Cayman...LOL
Old 01-12-2007, 11:07 PM
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Originally Posted by jangy
That's right..I forgot about your run. Just so i don't have to dig up that thread, what did the biatch feel like when it cut off? Were you creeping up or straight accelerating?
i floored it at about 65 and kept it there until it stopped accelerating at 158


here is the vid

http://www.youtube.com/watch?v=AvsNn-26d-s
Old 01-12-2007, 11:12 PM
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'06 E55, '05 SLK55, a few others
Never hit the limit in the '06, but my blown W210 ran HARD up to 150, then started slowing down as if I was backing out of the throttle and stopped at an indicated 156. That was it. It only took about half the pedal to maintain it, but didn't budge 1 mph as I increased throttle. It just acted is if it was already on the floor and would not go faster. No cut off like a GM car or truck, no jerking, no nothing. It just would not go any faster no matter how hard I was accelerating up to 155. It just slarted slowing as I passed 150 like I backed out of it. My E430 was exactly the same, but the limit was 130 mph. I think the differences between cars are speedo calibration, but the limit in the '02 was almost exactly 155 mph like the factory says. That was with stock Monoblocks and 285's on the rear, so maybe wheel/tire changes affect other cars?
Old 01-13-2007, 12:13 AM
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So, it sounds like the injectors may back off, instead a full on shut down of any cylinders? I would hate to hate that limit laid up in a turn and have the thing start bucking!!
Old 01-13-2007, 09:03 AM
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W211 E55
I suffer from "premature limitation" at 143, but at least it is a smooth engagement.

It seems to be a soft-touch style limiter. No bucking, no "wall", just the inability to gather velocity further.
Old 01-13-2007, 09:05 AM
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Originally Posted by jangy
So, it sounds like the injectors may back off, instead a full on shut down of any cylinders?
I would be surprised if it wasn't controlled through the ignition. The last thing you want to do is go lean under boost at max revs.
Old 01-13-2007, 09:49 AM
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2007 S65, 2005 Nissan Armada
mine went to 156 like a bat out of hell and then eased up to 158 and stayed there. I did it more times than I can count.
Old 01-13-2007, 10:33 AM
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whats top speed un-restricted?
Old 01-13-2007, 11:14 AM
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near 200mph.
Old 01-13-2007, 11:18 AM
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Old 01-13-2007, 01:23 PM
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Run out of road at 159 on a 'track', was suprised when I passed 155. It felt that I could go faster.
Old 01-13-2007, 02:21 PM
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Sounds like the 155 is a bit liberal for all but one. I'd hate to not be able to hit 150. 160 was fun, but I'm after 175 now. I'll try after the ECU mod.
Old 01-13-2007, 03:12 PM
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Last year when I purchased my E it was limited to 156 as indicated on the speedo. It was as described, not able to gain mph, even down a slight grade. When I upgraded to the Renntech ECU/pulley, I was able to hit an indicated 193. The Renntech literature say it should be 189 or thereabouts. Gas mileage at this speed is horrible!!
Old 01-13-2007, 03:51 PM
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Originally Posted by eLTURCOamg
whats top speed un-restricted?
Euro re-restricted (on 300 km/h) runs 308 km/h on the speedo!

Complete un-restricted runs 320 km/h!

And 305 km/h in the 4th gear......

320 km/h = 198,83 mls

Last edited by //AMG55lover; 08-05-2009 at 06:26 PM.
Old 01-13-2007, 04:47 PM
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First off, it appears to me that the speedo is very accurate. As indicated below in the "Max Speed" field, my GPS indicated speed was 157. The speedo indicated 158 at the same time.

Second, the speed limiter begins the limiting process at 156 and holds the speed at 158. The transmission is in 4th gear when the limiter kicks in and then shifts to 5th when the speed hits 158. No matter how rapidly the car is accelerating at that time, it never hits 159.

Old 01-13-2007, 06:38 PM
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Originally Posted by can drive 55
First off, it appears to me that the speedo is very accurate. As indicated below in the "Max Speed" field, my GPS indicated speed was 157. The speedo indicated 158 at the same time.

Second, the speed limiter begins the limiting process at 156 and holds the speed at 158. The transmission is in 4th gear when the limiter kicks in and then shifts to 5th when the speed hits 158. No matter how rapidly the car is accelerating at that time, it never hits 159.

I'm positive it does. I've seen 160 on mine and wasa rider in one that hit 163 on one at the AMG Challenge in Fontana. The point was that all these times were with the car in full acceleration from about 60mph. I even had lengthy discussions with AMG at the time. My only question for this thread was where does it cut out if you do not accelerate through it.
Old 01-13-2007, 06:55 PM
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ECU restriction cancellation

Maybe many people know this, but at the giantic MB dealership/museum in London, they have their own track and if you're nice the tech's can apparently punch in a couple of codes and remove the restriction and let you out on the track. I don't know if they'll remove it permenantly but it would be nice to see the real power of AMG's.
Old 01-13-2007, 07:23 PM
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Originally Posted by kevine310
Maybe many people know this, but at the giantic MB dealership/museum in London, they have their own track and if you're nice the tech's can apparently punch in a couple of codes and remove the restriction and let you out on the track. I don't know if they'll remove it permenantly but it would be nice to see the real power of AMG's.
I think this idea stems from the dyno mode=secret code thing that Top Gear ran
Old 01-13-2007, 07:42 PM
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i highly doubt that dyno mode disables the limiter, 200mph w/ no abs or esp, not gonna happen


i would do it though


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