[mwh2009]

It definitely pulls just as hard all the way to the next gear.

[mtx450]

Originally Posted by bimmercar

problem is that i get used to the torque/speed on my 340i, and it doesn't feel fast anymore....

but carving twisties in sport+ plus is awesome.... i call it "riding the torque wave"

Originally Posted by Eriphill

Same thing happened to me. Hopefully the mppk can spice things up for me again...

Originally Posted by HitmanHearns

Same thing happened to me. That's why I have been contemplating jb4 so bad. i feel like it's slow.

+1 (sorta)

I think we are all just getting used to the power. Trust me, if it feels slow just look down and realize you're still doing illegal speeds.

JB4, here I come!

[ashpal19]

Originally Posted by Mo@BMWofFairfax

First 1000-1200 miles, keep it under 4,500 and under 80 mph.

I don't think I followed that.

I want to know how will I know if break in had happened?

[Big Nodge]

Nothing "happens." I just got to the 1,200 mile mark. They told me at my dealership very vaguely to take it easy until 1,000 or 1,200 miles. From the forums I learned that best practice is no WOT, no going > 4k RPMs, no going > 100mph until 1,200 miles.

So no real way to tell. There is a huge debate over whether break-in is really necessary in a modern car anyway. If you didn't do it I wouldn't worry about it too much.

[JamRWS6]

Don't worry. 500 miles after you add the JB4 it will again feel slow; it's called horsepower addiction that being said the car is absolutely not slow by any means

[Toocrazyg]

The First day out the dealer I gunned it let the engine rev high and kinda went over the speed limit lol, one thing I noticed is the more I did that the more aggressive my car got. Added 3 inch exhaust mid and rear, sounded amazing and drove way better more air flow of course, its an amazing car but horsepower addiction is a sickness. Just ordered jb4 and Evolution RaceWorks 4'5 inch down pipes all from TopGear Solutions. Can't wait to see the results and the difference.

[tmdals0213]

Originally Posted by Toocrazyg

The First day out the dealer I gunned it let the engine rev high and kinda went over the speed limit lol, one thing I noticed is the more I did that the more aggressive my car got. Added 3 inch exhaust mid and rear, sounded amazing and drove way better more air flow of course, its an amazing car but horsepower addiction is a sickness. Just ordered jb4 and Evolution RaceWorks 4'5 inch down pipes all from TopGear Solutions. Can't wait to see the results and the difference.

are you near LA?

[DFW_M]

Originally Posted by Big Nodge

Thanks all. Yeah, that was a loooong 1200 miles. Took me forever with life getting in the way (work, two small kids etc).

I do have adaptive suspension. Never driven a c450 amg, and never spent much time behind the wheel of an N55 so can't offer thoughts there. But I'll be on the lookout for real world test cases!

This is my first N55 vehicle. I've only had the N52/N54 and European Diesels in my recent Bimmers.
The N55 is very tame, almost feels "sluggish". The N54 was a beast (especially in my stock 335is). I assume (have not tested it yet) that the B58 is very close to the N54 tuned in the 335is. Definitely a big difference.

[bjcarls]

Originally Posted by Big Nodge

I do have adaptive suspension.

You want it more stiff? I think the sport setting is stiff (like a M3 in comfort), what I think I can feel are the narrow tires. I think it could use a 35 profile all around on 245/275 combination. Maybe a stiffer sway bar, but springs and shocks - no way.

[Big Nodge]

The most offensive thing about the suspension is definitely the body roll. I have a couple roundabouts right near my work, and without even pushing the car that hard I can feel it tipping over onto the sidewalls of the outer tires. I don't find squat and dive to be as troublesome as body roll. But overall yes, I do want the suspension to be stiffer. My current plan is ACS x-drive springs, Dinan shockware, Dinan sways. That should give me a modest drop, greatly reduced body roll, and a firmer, more responsive ride overall. That's the hope at least.

[Toocrazyg]

Originally Posted by tmdals0213

are you near LA?

Yes I am! Why?

[tmdals0213]

Originally Posted by Toocrazyg

Yes I am! Why?

would like to hear the exhaust work with the catless on your car! haha

[RPM90]

Originally Posted by ashpal19

How do you know when the "break in" has happened?

I want to know that on my 328i

When you've signed all the paperwork and you have the key fob in your pocket and you get in your new F30 and are ready to leave the dealership, the "break-in" has been completed.

BMW won't hate on you either.

The 340i B58 engine is a marvel, especially when combined with the 8AT.
The acceleration belies the engines power numbers and the cars weight.
A 4 door sedan of this weight should not be able to accelerate like this...but it does.

[Carlos@TAG]

Originally Posted by dr335is

This is my first N55 vehicle. I've only had the N52/N54 and European Diesels in my recent Bimmers.
The N55 is very tame, almost feels "sluggish". The N54 was a beast (especially in my stock 335is). I assume (have not tested it yet) that the B58 is very close to the N54 tuned in the 335is. Definitely a big difference.

My stock 340i feels a lot quicker than my previous 335is ever did, the N54is had incredible torque down low but from 4,000rpm to redline, the B58 definitely feels stronger. B58 is a really great successor to the N54/N55 IMO.

[Toocrazyg]

Originally Posted by tmdals0213

would like to hear the exhaust work with the catless on your car! haha

lol.. where are you located?? And sure anytime if your close by?

[JamRWS6]

Originally Posted by Neema@TAG

My stock 340i feels a lot quicker than my previous 335is ever did, the N54is had incredible torque down low but from 4,000rpm to redline, the B58 definitely feels stronger. B58 is a really great successor to the N54/N55 IMO.

Definitely agreed, and all of the dyno graphs confirm the B58 is holding power all the way to 7k, even tuned! The feel of the engine reminds me of an LSx based V8 with even more torque down low. Finally has the top end pull of the old NA BMW 6.

[DFW_M]

Originally Posted by Neema@TAG

My stock 340i feels a lot quicker than my previous 335is ever did, the N54is had incredible torque down low but from 4,000rpm to redline, the B58 definitely feels stronger. B58 is a really great successor to the N54/N55 IMO.

That is nice. Almost looks like BMW had to go "backward" from N54 to N55 to make the room for the B58. N55 is a great engine (probably more reliable than the N54), however, sounds like the B58 is the right thing for this car.

[Wires]

Originally Posted by Neema@TAG

My stock 340i feels a lot quicker than my previous 335is ever did, the N54is had incredible torque down low but from 4,000rpm to redline, the B58 definitely feels stronger. B58 is a really great successor to the N54/N55 IMO.

That's what I'm noticing as well. I had a N54 with Dinan S1, and the stock B58 pulls a lot harder than that combination.

[Vegetable]

Originally Posted by dr335is

That is nice. Almost looks like BMW had to go "backward" from N54 to N55 to make the room for the B58. N55 is a great engine (probably more reliable than the N54), however, sounds like the B58 is the right thing for this car.

"Probably" more reliable than the N54? No way

[tmdals0213]

Originally Posted by Toocrazyg

lol.. where are you located?? And sure anytime if your close by?

near glendale/dtla

[strumbringer]

+1. The B58 is a whole different animal relative to the N54/N55, and anyone who thinks the difference is marginal has not actually driven one in anger.

[DFW_M]

Originally Posted by Vegetable

"Probably" more reliable than the N54? No way

Had my 335is for about 3 years (34k miles) with absolutely zero problems, so...