question about rpm

mosesyr · 03-29-2011, 11:41 PM

Hey guys. I just got an new e92 m3. White, fox red/carbon fiber trim leater, 6MT, and with all pkgs. It's an awesome beast and I really really love it.
Now I just did the 1200 miles service and it's much faster!
I have a question is that my m3 is only going around 72mph at 3000 rpm in 6th gear. It that normal?
Even my 335i before was going 95-100 mph at 3000rpm. My friends' G37 is also around 95mph.
Is it normal at 72mph with 3000rpm with an e92 m3?

Sandye90m3 · 03-29-2011, 11:46 PM

I'm no expert but I can tell you from what I personally think which may be totally irrelevant. But remember that this is a high performance engine, where as the other engines that you are stating are not. The M3's engine is designed to rev freely, hence the 8400rpm redline. The other cars that you are mentioning have a redline of around 6700rpm. Hope this helps, and I hope I am right!

mosesyr · 03-30-2011, 12:38 AM

any owners know?

John Tanglewood · 03-30-2011, 12:45 AM

this is 100% normal! They all rev high, sucks a little for gas mileage, but whuddayagonnado, right?

I like how fast I can go in third!

Seattle S65B40 · 03-30-2011, 12:52 AM

Quote:

Originally Posted by John Tanglewood

this is 100% normal! They all rev high, sucks a little for gas mileage, but whuddayagonnado, right?

I like how fast I can go in third!

Congrats on the new car. Don't stress. try redlining in 6th and then tell us what the corresponding speed is...

NICE SIG Tanglewood. Third gear is the sh!t...

JCtx · 03-30-2011, 01:02 AM

Exactly 72 mph at 3K rpm on my '08 as well, so nothing has changed

. Wish it was a lot higher too, but there's nothing we can do. Car would be a lot better with gas. With the ridiculously high rpm and ridiculously small gas tank, this car SUCKS for travel, but that's what I mostly use it for. Oh well. Just hope gas doesn't keep going up

.

e1000 · 03-30-2011, 10:28 AM

Yes it's normal, and is also the same reason why the "low end torque" argument of the 335i holds no merit. The other two cars you mentioned run lower rpm, but also have a MUCH shorter rpm range.

Erhan · 03-30-2011, 10:55 AM

I never understood why BMW is using such short ratios for 6th (or 7th in dct)? Is there any track in the world where you want short ratio on 6th gear? Or any canyon road? Would be nice to cruise at 2krpm @ 70mph.

sameh · 03-30-2011, 10:58 AM

Quote:

Originally Posted by erhanh

I never understood why BMW is using such short ratios for 6th (or 7th in dct)? Is there any track in the world where you want short ratio on 6th gear? Or any canyon road? Would be nice to cruise at 2krpm @ 70mph.

The day I need 7th on a track would be the most exciting driving day for me..!!!

bruce.augenstein@comcast. · 03-30-2011, 11:21 AM

Quote:

Originally Posted by erhanh

I never understood why BMW is using such short ratios for 6th (or 7th in dct)? Is there any track in the world where you want short ratio on 6th gear? Or any canyon road? Would be nice to cruise at 2krpm @ 70mph.

Although mileage would likely climb significantly with that sort of gearing, the car would be pretty much a pig out on the highway.

After trading in our '93 LT-1 six-speed Vette on our first M3 (a '95), the throttle response and available acceleration in top gear was a revelation and a delight. Yes, the Vette was a bunch faster than the bimmer (by a full second in the quarter mile, stock to stock), but it was a real slug in top gear until you got up to near 100 or so. The M3 was not only willing, but eager in top gear at highway speeds. The current model is even better in that regard. It also seems pretty comfy and quiet at 3500 - 4000 rpm. No vibration or anything. Just effortless speed.

persian54 · 03-30-2011, 12:47 PM

hmm i don't think i rev at 3k when I'm only going 70... i think that's more around 80?
maybe the 7th gear in the DCT?

I haven't been on the freeway in a little while (well, at least one that was moving past 30mph, stupid LA traffic)

next time I'm on when it's open I'll check it out

MMMeister · 03-30-2011, 01:54 PM

That's normal.
My M3 hits 3,000+ RPM at 65 mph since this has a high rev limit.
I had a Honda S2000 with a similar high rev limit that also cruises at that RPM.

Don't worry about wear and tear here. These engines are happy(partying) at that RPM.

sameh · 03-30-2011, 05:04 PM

Just looked at mine. On 7th at 3K the car was running 76MPH.

pmeloche · 03-30-2011, 07:00 PM

Can someone explain to me logically how the car can be "faster" after the 1200m/2000km service? This makes no sense apart from the fact that now that we can rev it higher we can achieve higher speed. The car is not intrinsically "faster" it's just that the slower speed were self-induced by the recommended BMW break-in period.

ThunderMoose · 03-30-2011, 07:26 PM

Quote:

Originally Posted by sameh

The day I need 7th on a track would be the most exciting driving day for me..!!!

+1

gthal · 03-30-2011, 07:47 PM

Quote:

Originally Posted by pmeloche

Can someone explain to me logically how the car can be "faster" after the 1200m/2000km service? This makes no sense apart from the fact that now that we can rev it higher we can achieve higher speed. The car is not intrinsically "faster" it's just that the slower speed were self-induced by the recommended BMW break-in period.

Peak HP/torque attained at higher RPM range. During break-in, you don't play in this range and therefore don't experience peak power.

pmeloche · 03-30-2011, 07:52 PM

Quote:

Originally Posted by gthal

Peak HP/torque attained at higher RPM range. During break-in, you don't play in this range and therefore don't experience peak power.

I knew that. that does not make the car inherently faster. The only reason it goes faster is because the whole range of RPMs is accessed. There is nothing inherently in the 1200m service that makes the car faster.

RevFreak14 · 03-30-2011, 08:05 PM

Quote:

Originally Posted by e1000

Yes it's normal, and is also the same reason why the "low end torque" argument of the 335i holds no merit. The other two cars you mentioned run lower rpm, but also have a MUCH shorter rpm range.

JCtx · 03-30-2011, 10:05 PM

Quote:

Originally Posted by persian54

maybe the 7th gear in the DCT?

The one I drove turned exactly 74 at 3K, so pretty much the same. And yes, you'd never use 6th on a track, so why it wasn't made taller? It'd be slower to pass, but simply downshift to 5th and problem solved. That's happen less than 1% of the time I'm on the highway, so it's a non-issue to most. Where it makes even less sense is on the DCTs, where 7th could have been a deep overdrive, leaving the first 6 ratios just like the manual.

sensi09 · 03-30-2011, 10:15 PM

An overdrive gear would definitely help highway mileage. But then again, 7th gear is usable at around 50 or so in the city, so a tall 7th gear may have made city mileage even worse, so it might be all a wash.

BobsM3Coupe · 03-31-2011, 01:38 AM

7th gear on the DCT is an overdrive. Just not much of one.

sameh · 03-31-2011, 07:21 AM

here

03-29-2011, 11:41 PM	#1
mosesyr New Member 10 Rep 20 Posts Drives: 2011 E92 M3 zcp Join Date: Mar 2011 Location: KU iTrader: (0)	question about rpm Hey guys. I just got an new e92 m3. White, fox red/carbon fiber trim leater, 6MT, and with all pkgs. It's an awesome beast and I really really love it. Now I just did the 1200 miles service and it's much faster! I have a question is that my m3 is only going around 72mph at 3000 rpm in 6th gear. It that normal? Even my 335i before was going 95-100 mph at 3000rpm. My friends' G37 is also around 95mph. Is it normal at 72mph with 3000rpm with an e92 m3?
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03-29-2011, 11:46 PM	#2
Sandye90m3 Major 167 Rep 1,159 Posts Drives: M3 Join Date: Oct 2009 Location: Calgary, CA iTrader: (0)	I'm no expert but I can tell you from what I personally think which may be totally irrelevant. But remember that this is a high performance engine, where as the other engines that you are stating are not. The M3's engine is designed to rev freely, hence the 8400rpm redline. The other cars that you are mentioning have a redline of around 6700rpm. Hope this helps, and I hope I am right! __________________ M3.E90 JZB *Coded.GTSDCT.BomizValved.TurnerTestPipes.ResDelete .EurochargedTune.AAFilter.HRER40s*
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03-30-2011, 12:38 AM	#3
mosesyr New Member 10 Rep 20 Posts Drives: 2011 E92 M3 zcp Join Date: Mar 2011 Location: KU iTrader: (0)	any owners know?
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03-30-2011, 12:45 AM	#4
John Tanglewood Porn Star 1316 Rep 3,350 Posts Drives: E60 M5 \| F95 X5M \| F90 M5 Join Date: Dec 2009 Location: Stamford, CT iTrader: (13)	this is 100% normal! They all rev high, sucks a little for gas mileage, but whuddayagonnado, right? I like how fast I can go in third! __________________
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03-30-2011, 01:02 AM	#6
JCtx Major General 258 Rep 5,012 Posts Drives: No BMW yet Join Date: May 2008 Location: El Paso TX iTrader: (0)	Exactly 72 mph at 3K rpm on my '08 as well, so nothing has changed . Wish it was a lot higher too, but there's nothing we can do. Car would be a lot better with gas. With the ridiculously high rpm and ridiculously small gas tank, this car SUCKS for travel, but that's what I mostly use it for. Oh well. Just hope gas doesn't keep going up . Last edited by JCtx; 03-30-2011 at 09:58 PM..
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03-30-2011, 10:28 AM	#7
e1000 that's what SHE said! 75 Rep 1,163 Posts Drives: 2011 E92 M3 ZCP Join Date: Jun 2010 Location: OC iTrader: (1)	Yes it's normal, and is also the same reason why the "low end torque" argument of the 335i holds no merit. The other two cars you mentioned run lower rpm, but also have a MUCH shorter rpm range. __________________
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03-30-2011, 10:55 AM	#8
Erhan Colonel 87 Rep 2,464 Posts Drives: Cooper S Join Date: Oct 2008 Location: Seattle iTrader: (0)	I never understood why BMW is using such short ratios for 6th (or 7th in dct)? Is there any track in the world where you want short ratio on 6th gear? Or any canyon road? Would be nice to cruise at 2krpm @ 70mph. __________________ 2011 MINI Cooper S previous cars: E92 M3, Z4MC, Z4 Roadster, E36 328 Sedan
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03-30-2011, 12:47 PM	#11
persian54 Lieutenant General 928 Rep 15,818 Posts Drives: M760/G83M4 Join Date: Jun 2009 Location: The Valley, SoCal iTrader: (298)	hmm i don't think i rev at 3k when I'm only going 70... i think that's more around 80? maybe the 7th gear in the DCT? I haven't been on the freeway in a little while (well, at least one that was moving past 30mph, stupid LA traffic) next time I'm on when it's open I'll check it out __________________ From E93 335i to E89 Z4 to E93 M3/E89 Z4 to E350/SL550
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03-30-2011, 01:54 PM	#12
MMMeister Enlisted Member 2 Rep 41 Posts Drives: E92 M3 Join Date: Jan 2011 Location: Ewa Beach, HI iTrader: (0)	That's normal. My M3 hits 3,000+ RPM at 65 mph since this has a high rev limit. I had a Honda S2000 with a similar high rev limit that also cruises at that RPM. Don't worry about wear and tear here. These engines are happy(partying) at that RPM. __________________ 2011 E92 SG DCT ZCP
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03-30-2011, 05:04 PM	#13
sameh Lieutenant Colonel 171 Rep 1,530 Posts Drives: 2015 Porsche 911S Join Date: Aug 2010 Location: Texas iTrader: (0)	Just looked at mine. On 7th at 3K the car was running 76MPH. __________________ 2011 E92 JB/BL/DCT--->80K Miles 2015 F80 SS/SO/DCT?->28K Miles 2015 Porsche 911S
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03-30-2011, 07:00 PM	#14
pmeloche Lieutenant Colonel 24 Rep 1,604 Posts Drives: 2013 F25 X3 xDrive35i Join Date: Feb 2008 Location: Montréal, Canada iTrader: (0)	Can someone explain to me logically how the car can be "faster" after the 1200m/2000km service? This makes no sense apart from the fact that now that we can rev it higher we can achieve higher speed. The car is not intrinsically "faster" it's just that the slower speed were self-induced by the recommended BMW break-in period. __________________ Patrice 2013 F25 X3 xDrive35i Vermillion Red
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03-30-2011, 10:15 PM	#20
sensi09 Lieutenant Colonel 30 Rep 1,789 Posts Drives: . Join Date: Dec 2010 Location: socal iTrader: (1)	An overdrive gear would definitely help highway mileage. But then again, 7th gear is usable at around 50 or so in the city, so a tall 7th gear may have made city mileage even worse, so it might be all a wash.
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03-31-2011, 01:38 AM	#21
BobsM3Coupe Brigadier General 1469 Rep 3,944 Posts Drives: X5MC Join Date: Nov 2009 Location: California iTrader: (4)	7th gear on the DCT is an overdrive. Just not much of one.
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03-31-2011, 07:21 AM	#22
sameh Lieutenant Colonel 171 Rep 1,530 Posts Drives: 2015 Porsche 911S Join Date: Aug 2010 Location: Texas iTrader: (0)	here Attached Images __________________ 2011 E92 JB/BL/DCT--->80K Miles 2015 F80 SS/SO/DCT?->28K Miles 2015 Porsche 911S
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