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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Just how fast IS the N52?



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      10-17-2013, 08:29 PM   #23
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Quote:
Originally Posted by norsairius View Post
Runflat tires are pretty heavy too. You could always consider ditching those if you want to drop some unsprung weight/rotating mass.

I'm running the OEM Turanzas and they're all kinds of horrible. Loud, rough ride, and horrible tread life. I'm replacing them early next year with Continental DWS tires which will be 7 lbs. lighter each. I'll get more miles on them, better ride quality, and a quieter ride.
The DWS's on my friend's e93 are way quieter (almost as quiet as my M5) then the Bridgestone RE050As and the ride quality is so much better. I haven't had the opportunity to flog them; yet so I cannot speak to any benefit to the lower Unsprung weight and reciprocating mass.
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      10-17-2013, 08:35 PM   #24
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the wheels are what is really doing it.... the lower rolling mass/weight makes the difference
Yeah, but improved power/weight ratio is improved with the CF hood and trunk.
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      10-17-2013, 10:51 PM   #25
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Quote:
Originally Posted by norsairius
Runflat tires are pretty heavy too. You could always consider ditching those if you want to drop some unsprung weight/rotating mass.

I'm running the OEM Turanzas and they're all kinds of horrible. Loud, rough ride, and horrible tread life. I'm replacing them early next year with Continental DWS tires which will be 7 lbs. lighter each. I'll get more miles on them, better ride quality, and a quieter ride.
Couldn't agree more. Forget new wheels. Just ditch run flats and don't look back. The 5-7 lbs saving per tire is huge.
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      10-18-2013, 12:55 PM   #26
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Quote:
Originally Posted by norsairius View Post
Runflat tires are pretty heavy too. You could always consider ditching those if you want to drop some unsprung weight/rotating mass.

I'm running the OEM Turanzas and they're all kinds of horrible. Loud, rough ride, and horrible tread life. I'm replacing them early next year with Continental DWS tires which will be 7 lbs. lighter each. I'll get more miles on them, better ride quality, and a quieter ride.
I can highly recommend the Conti DWS's, silent from inside, smooth ride, superb wet performance. Good wear. Very reasonable for the performance.
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      10-18-2013, 01:09 PM   #27
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I'm glad you all agree on using non-runflats, in particular the DWS's, haha.

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Originally Posted by Dylanize View Post
I can highly recommend the Conti DWS's, silent from inside, smooth ride, superb wet performance. Good wear. Very reasonable for the performance.
I've had Conti DWS tires on a couple different cars and I completely agree. Their performance on wet roads was actually shockingly good to me but I didn't get much of a chance to try them in the snow. I've heard they're quite good for an all season tire in snow though. The nicer ride will be heavenly too, especially considering a good bit of my driving takes place on crappy Milwaukee city streets.

I really can't wait to swap out the runfalts for the Conti DWS tires. I'd do the swap sooner, but I recently paid a bunch of money to replace one of my runflats that blew due to a pothole on the interstate and I'd rather go ahead and get as much value out of the tires as I'm able to tolerate, haha.
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      10-26-2013, 12:34 PM   #28
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Quote:
Originally Posted by Dylanize View Post
N20 was pretty quick, but it didn't feel like much of a difference from my N52K. Plus it sounded like doo-doo, and was no where near as Smoooth.
this
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      10-30-2013, 03:42 AM   #29
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Sometimes I really do wonder why BMW bothered giving us the N52. The M54 in my old '05 330Ci was a fantastic little engine compared to its replacement. Cost cutting fail.

My car went in for maintenance @ camelback BMW in Phoenix, AZ a few months ago and they gave me a 128i for a loaner with the tiptronic. I've never felt more disappointed in a BMW than when I had to drive that pile for 2 weeks while my car was getting fixed. Was so glad to have my heavier Xi back because in truth it really was a hell of a lot faster and more fun to drive. The N52 is a fast as it needs to be for what the intended design was. FBO just makes it more livable for the enthusiast.

No 4 cylinder turbo will ever convince me to go lower than 6 cylinders, even if the new N20 is a better engine for power in stock form. Its a lot like sprinkling sugar on feces. It might be sweeter but in the end its still $hit.
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      10-30-2013, 08:16 AM   #30
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I wonder what the fastest 0-60 time on a tuned and bolt on n52 was

Id prob say around 5.9 seconds (on a good day)
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      10-30-2013, 08:50 AM   #31
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Quote:
Originally Posted by Emozoo View Post
I wonder what the fastest 0-60 time on a tuned and bolt on n52 was

Id prob say around 5.9 seconds (on a good day)
Car and Driver clocked a 2009 328i 6mt at 5.9 in the 0-60 test in May 2009, and that sedan was bone stock. I would imagine with intake/exhaust/tune and low weight wheel/tires mid 5s should be very doable.

Either way, anything below 6 seconds in 0-60 is PLENTY quick for a daily driver.....
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      10-30-2013, 01:14 PM   #32
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Originally Posted by fw_fw View Post
Either way, anything below 6 seconds in 0-60 is PLENTY quick for a daily driver.....
Exactly... If I can be going 60 in 6 seconds, I'm already speeding.
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      10-30-2013, 03:04 PM   #33
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Quote:
Originally Posted by Emozoo View Post
I wonder what the fastest 0-60 time on a tuned and bolt on n52 was

Id prob say around 5.9 seconds (on a good day)
Not sure about 0-60mph, however I can tell you I've run 14.4@97-98mph with a 2.3 60ft, stock automatic 330i 2006.

From a 60+mph roll I hang right next to supposedly midish to high 13's 1/4 mile cars, only time I lose ground is when the slowmatic shifts.

It's not as slow as people make it out to be.... but it's lacking torque for it's size, so from a start it won't perform that great...

I see no reason why a manual with intake/exhaust/tune/good driver (so with a ~2.0 60ft) couldn't touch mid 13's.

Btw. I know it's still not fast by today standards, but personally I was expecting much worse as before I bought it everybody was telling me how slow it is...

Last edited by mecbain; 10-30-2013 at 07:10 PM.
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      10-30-2013, 07:20 PM   #34
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Quote:
Originally Posted by Emozoo View Post
I wonder what the fastest 0-60 time on a tuned and bolt on n52 was

Id prob say around 5.9 seconds (on a good day)
Not that it's 100% accurate, but my car consecutively does 5.6-5.7 0-60mph runs. It's an auto so there is room to knock off more time with a manual.
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      10-30-2013, 07:50 PM   #35
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500hp to da wheeeeeeeeel.
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      10-30-2013, 07:53 PM   #36
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Originally Posted by Johnny D View Post
Not that it's 100% accurate, but my car consecutively does 5.6-5.7 0-60mph runs. It's an auto so there is room to knock off more time with a manual.
really? thats pretty damn good..do you have an exhaust on that bad boy?
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      10-31-2013, 10:38 AM   #37
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Quote:
Originally Posted by rich123321
Quote:
Originally Posted by Eagle1oh7
My 328i with N51 feels a lot faster after doing ForgeStar F14 18s with PSS, and CSL CF trunk and hood. My estimate says I lost up to 70lbs. off OEM curb weight. Got an aFe sealed CAI box too. Dropping the weight here and there helps out. Next major weight reduction is the IND CF roof for the E90 M3. Tune and exhaust is all I got left to do after that besides window dressing.
70 pounds makes that big of a difference?
Yes 70 pounds is enough to notice.
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      11-04-2013, 09:51 AM   #38
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I have an E90 N52 with manual. Car and Driver has tested it 3 times, resulting in 0-60 times of 6.1, 6.0 and 5.9.

Car & Driver ran an article many years ago showing the effects of using larger heavier wheels. If I remember correctly, going down 2 sizes in wheels cut .2 seconds from 0-60 times due to the lighter wheels. Going from RFTs to normal tires would also improve performance. For example, i saved about 7.5 pounds per wheel running Conti DWs instead of the stock RFTs. I could feel the difference.

A commonly overlooked method of improving the performance of our NA cars is to change the differential ratio. My car has a 3.23 ratio. If I went to the 3.73 ratio the 6AT uses, I'd put down 15% more torque to the rear wheels, in all gears and at all RPM. That should make a big difference. But there are downsides. Shorter gearing means worse gas mileage, less max speed in every gear, little more noise on the highway and little more wear and tear. I don't know what options owners of 6AT cars have.

Last edited by driverman; 11-04-2013 at 10:00 AM.
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      11-04-2013, 11:21 AM   #39
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Quote:
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Sometimes I really do wonder why BMW bothered giving us the N52. The M54 in my old '05 330Ci was a fantastic little engine compared to its replacement. Cost cutting fail.
The N52 is a better motor than the M54 in almost every way. More power (with a better torque curve), less weight, and better fuel economy.
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      11-04-2013, 01:30 PM   #40
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Quote:
Originally Posted by driverman
I have an E90 N52 with manual. Car and Driver has tested it 3 times, resulting in 0-60 times of 6.1, 6.0 and 5.9.

Car & Driver ran an article many years ago showing the effects of using larger heavier wheels. If I remember correctly, going down 2 sizes in wheels cut .2 seconds from 0-60 times due to the lighter wheels. Going from RFTs to normal tires would also improve performance. For example, i saved about 7.5 pounds per wheel running Conti DWs instead of the stock RFTs. I could feel the difference.

A commonly overlooked method of improving the performance of our NA cars is to change the differential ratio. My car has a 3.23 ratio. If I went to the 3.73 ratio the 6AT uses, I'd put down 15% more torque to the rear wheels, in all gears and at all RPM. That should make a big difference. But there are downsides. Shorter gearing means worse gas mileage, less max speed in every gear, little more noise on the highway and little more wear and tear. I don't know what options owners of 6AT cars have.
The differential ratio has definitely caught my interest. I honestly am not worried about the worse gas mileage especially with 6 speed transmissions. Guess I'll wait till the warranty runs out to do the mod
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      11-04-2013, 02:04 PM   #41
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as fast as you want it to be. $ = endless possibilities
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      11-04-2013, 02:13 PM   #42
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It's slow... all torque and dies off at like 5000 rpm. I don't have an exhaust or anything but an intake and the powerbox.
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      11-05-2013, 01:12 AM   #43
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Our cars aren't exactly slow but I can admit that when I gas my car I want more power which won't happen since we are limited to what we can do. I mean 0-60 in 5.9s is pretty fast for our cars compared to others, best I ever did was 6.8s but it's because I had the stock exhaust on, 100lbs of things in the back like my sound system.

I should try to time myself now since I sold my sound system, did a muffler delete, and have a carbon fiber trunk.
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      11-05-2013, 08:06 AM   #44
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Quote:
Originally Posted by tigermack View Post
It's slow... all torque and dies off at like 5000 rpm. I don't have an exhaust or anything but an intake and the powerbox.

ehhh debatable with the tune mine pulls to redline it seems
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