428i acceleration [VIDEO]

Bluelondon · 02-23-2014, 08:06 PM

So I tried to really test the 428i acceleration after clocking around 1200 miles on the car. I put the car in sport while stationary, then pressed hard on the gas all the way down. The acceleration was slow up to around 2500rpm where it then picked up very quickly. I expected first gear would have more of a kick from stationary.

Is this normal when not using launch control?

OUGrad05 · 02-23-2014, 08:19 PM

Auto I assume? Turn off traction control...buddies car did similar until I turned off traction control...another thing you could try would be put your foot down from about a 7 to 10mph roll...car just jumps forward at that point...

May also be your expectations? Keep in mind it is a 2.0L and it does need to spin the turbo to really get going...

S4NoMore · 02-23-2014, 08:31 PM

Did you switch to manual shifting and go to 1st gear? If not I believe it'll start out in 2nd gear, though I could be wrong if the Sport puts you in 1st gear at stops.

Bluelondon · 02-23-2014, 08:59 PM

Quote:

Originally Posted by OUGrad05

Auto I assume? Turn off traction control...buddies car did similar until I turned off traction control...another thing you could try would be put your foot down from about a 7 to 10mph roll...car just jumps forward at that point...

May also be your expectations? Keep in mind it is a 2.0L and it does need to spin the turbo to really get going...

I did try with TC off and the results were the same

Quote:

Originally Posted by S4NoMore

Did you switch to manual shifting and go to 1st gear? If not I believe it'll start out in 2nd gear, though I could be wrong if the Sport puts you in 1st gear at stops.

Yes tried that too, started in 1st, same result. Slow build up till turbo kicks in.

Bassthe1st · 02-23-2014, 09:26 PM

Quote:

Originally Posted by Bluelondon

I did try with TC off and the results were the same

Yes tried that too, started in 1st, same result. Slow build up till turbo kicks in.

It's seems weird because if I remember correctly, on mine, in sport mode from a dead stop it almost feels like dumping the cluch.

SomeRandomer123 · 02-23-2014, 09:28 PM

My 328i launches immediately and obviously grows stronger as you go up the rev-range like any engine would.

Peak torque is in at 1250rpm and stays flat to 4800rpm.

There is no real turbo lag with the N20 28i and it is a very responsive engine.

MrClean · 02-24-2014, 12:12 AM

I thought launch control involved revving the car to about 3500rpm with your foot on the brake first, then flooring it when you release the brake. You have to get the turbo spinning to get boost...

J

Bluelondon · 02-24-2014, 12:48 AM

Quote:

Originally Posted by MrClean

I thought launch control involved revving the car to about 3500rpm with your foot on the brake first, then flooring it when you release the brake. You have to get the turbo spinning to get boost...

J

Yup, but I asked about acceleration when not using LC

MrClean · 02-24-2014, 01:04 AM

Duh...

Well, the reason is in there, I think. The turbos do need to spool up. The lag is not bad with this engine, but things don't start to get interesting until about 2500 rpm, and even better above 4000. It is a lot to expect from a 2.0 four-banger, but I think it does a respectable job.

Bluelondon · 02-24-2014, 02:43 AM

Quote:

Originally Posted by SomeRandomer123

My 328i launches immediately and obviously grows stronger as you go up the rev-range like any engine would.

Peak torque is in at 1250rpm and stays flat to 4800rpm.

There is no real turbo lag with the N20 28i and it is a very responsive engine.

If you watch this video you'll see what I mean. In first gear, it doesn't launch immediately as you said, rather a gradual climb to around 2k-3k then it goes mental.

Both take offs were pedal to the floor. I'm just curious if this is normal for 1st gear.

Would appreciate feedback from other 428i owners too.

SomeRandomer123 · 02-24-2014, 05:51 AM

Quote:

Originally Posted by Bluelondon

If you watch this video you'll see what I mean. In first gear, it doesn't launch immediately as you said, rather a gradual climb to around 2k-3k then it goes mental.

Both take offs were pedal to the floor. I'm just curious if this is normal for 1st gear.

Would appreciate feedback from other 428i owners too.

Cheers for the video. That's interesting on two accounts...

The first being the sound! Since when did the N20 28i sound that gruff and beefy? Sounds good.

Secondly, that is strange behaviour. You're saying you launched with your foot to the floor immediately? I can see that it seems dopey below 2500rpm and it doesn't seem like the torque converter fully locks up until then either.

Our torque converters have the ability to lock up from 1100rpm and I barely ever detect mine purposely slipping. Mine would also light up the rears (and it's on the big 255s!) if I had DSC fully off like you do. Unless the road is bone dry and stupidly perfect, my DTC would have a little nibble at the power.

However, as I search around YouTube looking at other 328i's accelerating, I see similar behaviour. I also don't see any traction loss, so it must be the UK's shit roads to blame! This may be the auto transmission's method of preventing excessive traction loss through torque converter slippage as it looks like more load is placed on the engine at ~2300rpm hence why the needle slows down at that point then takes off again.

As an aside, I'd love to hear yours rev out - not heard the 28i making a sound like that before!

Glassy · 02-24-2014, 06:22 PM

Quote:

Originally Posted by Bluelondon

So I tried to really test the 428i acceleration after clocking around 1200 miles on the car. I put the car in sport while stationary, then pressed hard on the gas all the way down. The acceleration was slow up to around 2500rpm where it then picked up very quickly. I expected first gear would have more of a kick from stationary.

Is this normal when not using launch control?

What option/package do you have to get to have the "launch control" feature, or is it standard?

I'm in Cali as well.

momo3605 · 02-24-2014, 06:31 PM

Quote:

Originally Posted by Glassy

What option/package do you have to get to have the "launch control" feature, or is it standard?

I'm in Cali as well.

It's standard for 2014 with sport auto I believe

Saphirschwarz · 02-24-2014, 06:47 PM

From my point of view ( a 320d) it looks very good until 2500 then unbelievable until 4000 !

I'll have a 428i in manual in a couple months and i'll try to compare.

Anyway that sound is so good !! It'll make the wait easier !

Bluelondon · 02-24-2014, 06:57 PM

Quote:

Originally Posted by SomeRandomer123

Cheers for the video. That's interesting on two accounts...

The first being the sound! Since when did the N20 28i sound that gruff and beefy? Sounds good.

Secondly, that is strange behaviour. You're saying you launched with your foot to the floor immediately? I can see that it seems dopey below 2500rpm and it doesn't seem like the torque converter fully locks up until then either.

Our torque converters have the ability to lock up from 1100rpm and I barely ever detect mine purposely slipping. Mine would also light up the rears (and it's on the big 255s!) if I had DSC fully off like you do. Unless the road is bone dry and stupidly perfect, my DTC would have a little nibble at the power.

However, as I search around YouTube looking at other 328i's accelerating, I see similar behaviour. I also don't see any traction loss, so it must be the UK's shit roads to blame! This may be the auto transmission's method of preventing excessive traction loss through torque converter slippage as it looks like more load is placed on the engine at ~2300rpm hence why the needle slows down at that point then takes off again.

As an aside, I'd love to hear yours rev out - not heard the 28i making a sound like that before!

Thanks, I do love the sound. Of course it's no 35i or M, but for a 2.0 litre I still think it sounds pretty sweet

Yes gas pedal to the floor both times. This could be totally normal, I'm not complaining about the engine, I' just curious if this slow lift off in first gear is normal for this engine. Thanks for your input.

And sure, I'll try to take a few more vids of the exhaust tonight.

Bluelondon · 02-24-2014, 07:00 PM

Quote:

Originally Posted by Glassy

What option/package do you have to get to have the "launch control" feature, or is it standard?

I'm in Cali as well.

As Momo said, I think it's standard on the 4 series.

Having said that, I never see the "flag" that I'm supposed to see in the dash indicating LC is ready. I turn traction control off, stationary, foot hard down on the break, rev to 3000, wait 3 seconds, still don't see a flag icon.

I'm probably missing something or dong something wrong.

Glassy · 02-24-2014, 07:05 PM

Quote:

Originally Posted by Bluelondon

As Momo said, I think it's standard on the 4 series.

Having said that, I never see the "flag" that I'm supposed to see in the dash indicating LC is ready. I turn traction control off, stationary, foot hard down on the break, rev to 3000, wait 3 seconds, still don't see a flag icon.

I'm probably missing something or dong something wrong.

I just tried the exact same thing and I have a 435i auto as well.....nothing.

Might not be a feature for BMWNA? Or maybe needed to get the tech package?

02-23-2014, 08:06 PM	#1
Bluelondon Second Lieutenant 45 Rep 232 Posts Drives: 2017 X3 35i Join Date: Jul 2009 Location: California, USA iTrader: (0)	428i acceleration [VIDEO] So I tried to really test the 428i acceleration after clocking around 1200 miles on the car. I put the car in sport while stationary, then pressed hard on the gas all the way down. The acceleration was slow up to around 2500rpm where it then picked up very quickly. I expected first gear would have more of a kick from stationary. Is this normal when not using launch control? Last edited by Bluelondon; 02-24-2014 at 04:11 AM..
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02-23-2014, 08:19 PM	#2
OUGrad05 Captain 527 Rep 861 Posts Drives: 2023 i4 and 2022 Acura MDX Join Date: Oct 2012 Location: United States iTrader: (0)	Auto I assume? Turn off traction control...buddies car did similar until I turned off traction control...another thing you could try would be put your foot down from about a 7 to 10mph roll...car just jumps forward at that point... May also be your expectations? Keep in mind it is a 2.0L and it does need to spin the turbo to really get going...
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02-23-2014, 08:31 PM	#3
S4NoMore Major 253 Rep 1,003 Posts Drives: 16 340i, 15 X3d, 91 318i Join Date: Aug 2008 Location: Philly suburbs iTrader: (2) Garage List 2016 BMW 340i [0.00] 2015 BMW X3 28d [0.00] 1991 BMW 318i [8.66]	Did you switch to manual shifting and go to 1st gear? If not I believe it'll start out in 2nd gear, though I could be wrong if the Sport puts you in 1st gear at stops.
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02-23-2014, 09:28 PM	#6
SomeRandomer123 Colonel 306 Rep 2,612 Posts Drives: F30 328i Luxury - Sport Auto Join Date: May 2011 Location: Lancashire, North West England, UK iTrader: (0)	My 328i launches immediately and obviously grows stronger as you go up the rev-range like any engine would. Peak torque is in at 1250rpm and stays flat to 4800rpm. There is no real turbo lag with the N20 28i and it is a very responsive engine. __________________ Gone: 2006 BMW E60 520d SE 6MT Gone: 2009 BMW E90-LCI 330d SE 6MT Current: 2012 F30 328i Luxury 8AT On Order: 2015 Audi A6 Avant Ultra, Black Edition (sorry!)
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02-24-2014, 12:12 AM	#7
MrClean Lieutenant 21 Rep 437 Posts Drives: 2014 EBII 428i Join Date: May 2008 Location: Shangri LA iTrader: (1)	I thought launch control involved revving the car to about 3500rpm with your foot on the brake first, then flooring it when you release the brake. You have to get the turbo spinning to get boost... J
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02-24-2014, 01:04 AM	#9
MrClean Lieutenant 21 Rep 437 Posts Drives: 2014 EBII 428i Join Date: May 2008 Location: Shangri LA iTrader: (1)	Duh... Well, the reason is in there, I think. The turbos do need to spool up. The lag is not bad with this engine, but things don't start to get interesting until about 2500 rpm, and even better above 4000. It is a lot to expect from a 2.0 four-banger, but I think it does a respectable job.
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02-24-2014, 06:47 PM	#14
Saphirschwarz Major 1066 Rep 1,366 Posts Drives: M2 Join Date: Jan 2011 Location: Belgium iTrader: (0)	From my point of view ( a 320d) it looks very good until 2500 then unbelievable until 4000 ! I'll have a 428i in manual in a couple months and i'll try to compare. Anyway that sound is so good !! It'll make the wait easier !
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