[TheDudeMan]

I feel what you're talking about. It always feels like you catch the car flatfooted. As others note, this is most likely programing. I know in sport the throttle tightens up.

I think my other petpeve is the throttle cut depending on the steering angle. Very annoying when your trying to accelerate out of the corner.

[HighlandPete]

Originally Posted by upsidedownfunnel

When you extract 250+HP from a small 2.0L turbo engine you're NOT getting instant throttle response...

Agree, plus we must add in the programming for economy and low emissions, we have to work 'with' the engines and transmissions, if we want the best from them.

Even comparing something like the older 4.4 V8 NA engine vs. a 3.0 I6 turbo, (with similar power and torque), there is a difference in delivery.

Learn to get a few revs for reasonable turbo spooling before applying lots of throttle and/or fast manoeuvres, and there isn't much difference to the 4.4 V8. But let the engine and transmission 'relax' into economy running parameters and you can get caught out.

From my experience, an I4 just makes it more obvious we have to think a bit more about 'setting up' the engine transmission, before certain manoeuvres.

Flicking the shifter to M/S to get a few revs and a gear down change before we overtake, is a simple way to override hesitation from whatever source. It breaks any driver influenced adaptions as we drive, wakes up the transmission, spools the turbo, (even off load) ready for action.

[bavarianride]

Originally Posted by HighlandPete

Learn to get a few revs for reasonable turbo spooling before applying lots of throttle and/or fast manoeuvres, and there isn't much difference to the 4.4 V8. But let the engine and transmission 'relax' into economy running parameters and you can get caught out.

Relax parameters are what get me 42mpg on B46! And yes, it becomes second nature to to quickly go M/S or paddle down shift if needed.

[Turboh]

I have noticed that CAIs and less restrictive air filters will make throttle response crisper. Throttle lag will still be there but a bit less. Sport+ is Ok and may help it a bit, but the rpms do get pretty high and mileage will get hit. May try throttle programming. Still, it is a turbo but a damn good one.

[Seaford]

Sometimes it can be deceptive moving from one car to another - I would hazard a guess that a newish 330i is a lot more refined than an older bmw and is ‘deceptively fast’. My 330i is significantly quicker than my old f34 328i Despite the fact it’s basically the same motor.

Much the same way that a Bentley doesn’t feel quick until you look at the speedo whizzing round and things going blurry. Not that I’m comparing a bmw to a Bentley!

[ngalfano13]

vincechase Do you run premium gas? I had someone fill up with regular gas one time and it lagged after running regular. Once it had premium back in it, it ran fine.

[alpinewhite3]

Originally Posted by ngalfano13

vincechase Do you run premium gas? I had someone fill up with regular gas one time and it lagged after running regular. Once it had premium back in it, it ran fine.

These 4 cylinder turbos are actually really sensitive in this regard. i usually put 87 in all my leased vehicles but there was huge difference when using 87 vs 93. It's especially noticeable at high speeds. Car feels like it loses at least 15-20hp.

[timmahh]

Kinda sounds like traction control limiting power buildup to prevent wheel spin/loss of control. In sport w/ traction control off it'll probably "feel" better but then you have no protection/assistance if you need it.

[ztech]

Yes, my RWD model definitely has throttle lag when you come off the line. Whether DSC/traction is ON or OFF, when you hit the pedal, the car almost feel like it stalls for a second, and then slowly builds revs off the line. Even with a proper launch my 0-30 time is an abysmal ~2.3 seconds. That is a really slow 0-30 time, and is rivaled by a lot of boring grocery getters. Improving the time by even just by 2 to 3 tenths would be nice.

As an example lets compare my car with one of Vipin's runs, who has one of the quickest 330i set ups:

MY RWD (RACEBOX MINI)
0-30 MPH 2.32 seconds
0-60 MPH 4.97 seconds
60-100 MPH 6.29 seconds
30-60 MPH 2.65 seconds

VIPINS XDRIVE (DRAGY)
0-30 MPH 1.65 seconds
0-60 MPH 4.69 seconds
60-100 MPH 6.59 seconds
30-60 MPH 3.04 seconds



My car accelerates from 30-60 MPH in just 2.65 seconds, and 60-100 MPH in just 6.29 seconds, so power isn't the problem. But my car is a whopping .67 seconds slower to only 30 MPH!!

Now with wider tires, based on research, I'm pretty sure I can achieve .3 second improvement off the line, but I will still have to put some of the blame on what seems like a very slow throttle response time. Even though, due to inadequate tires, I am forced to do soft launches for best times, I still feel quite a bit of pedal/throttle lag as the car lazily builds revs.

It may be the case the 330i RWD models have intentionally delayed throttle response times, from the factory.
A pedal tuner may help. I'm going to try out the Dinan D440-1700 Throttle Booster. I'll give some feedback.


https://x-ph.com/dinan-throttle-booster/

[PK2348]

Originally Posted by upsidedownfunnel

I don't know any 4 cylinder car in this class that goes any significant amount faster than the 330i.

Audi A4 - about half a second faster

[bavarianride]

Originally Posted by ztech

My car accelerates from 30-60 MPH in just 2.65 seconds, and 60-100 MPH in just 6.29 seconds, so power isn't the problem. But my car is a whopping .67 seconds slower to only 30 MPH!!

You can improve throttle response by using M/S with sport.

[G30M]

Originally Posted by vincechase

is it me or does anybody else notice that throttle response lag on the g20 330 when you need to pass some one or accelerate at some point

I fee like bmw severely under powered the bmw 330 to make more money on the 340 and I am not having it lol.

I felt like even my e90 330 was quicker from the step on.

Anybody know how I can fix this but still stay in warranty with my lease.

Thanks

my M340i and M550i also feels like this. it's how turbo charged automatic cars made to pass emissions tests behave. nothing you can do.

[ShadowedAngles]

Originally Posted by ztech

It may be the case the 330i RWD models have intentionally delayed throttle response times, from the factory.
A pedal tuner may help. I'm going to try out the Dinan D440-1700 Throttle Booster. I'll give some feedback.


https://x-ph.com/dinan-throttle-booster/

How do you install the throttle booster?
Potential to void warranty?

[G30M]

Originally Posted by timmahh

Kinda sounds like traction control limiting power buildup to prevent wheel spin/loss of control. In sport w/ traction control off it'll probably "feel" better but then you have no protection/assistance if you need it.

in my car in sport mode with all nannies ON it doesn't cut power, and it lets the car go sideways a bit, not as much as Traction+ (aka MDM) not sure about the 330

[ztech]

Originally Posted by ShadowedAngles

How do you install the throttle booster?
Potential to void warranty?

So I tried to install it myself and it was easy enough to make the connections, but I couldn't figure out how to hide the wiring behind the carpet. It's a matter of removing the carpet, but I'm not very inclined.

[G30M]

Originally Posted by ztech

So I tried to install it myself and it was easy enough to make the connections, but I couldn't figure out how to hide the wiring behind the carpet. It's a matter of removing the carpet, but I'm not very inclined.

result?

[ztech]

Originally Posted by g21

result?

I just had someone install it today. He was able to hide the device and wires nicely behind the dash and carpet - looks completely stock.

The Dinan Throttle Booster has several preset modes with different throttle sensitivities: ECO (80%), STOCK (100%), DRIVE (150%), SPORT (175%), EXTREME (200%), and a CUSTOMIZED OPTION , all of which can be fine tuned.

So I set it to SPORT, and I can immediately see the improvement at parking lot speeds. Normal driving is much more enjoyable, as I get much more responsiveness. When you take off from a stop, the car doesn't feel like it has to think a second, before it pulls away.

I tried EXTREME, and its even better. Doesn't feel jerky in the sense a lot of people might think. It's all very smooth.

Part throttle accelerations at any speed feel instantaneous - no need to bang through gears by smashing the pedal (kickdown).

I want to play around with the settings and my xhp transmission settings, to get it just right.

As far a normal everyday driving goes - it's a must have (if you can't get your tuner to address throttle response). Honestly, feels like a 20-30hp gain- more impressive than a lot of tunes out there. Makes driving so much more enjoyable, even if you aren't going really that fast. Regarding performance gains, I would be surprised if it doesn't yield ,at least, 2/10ths of second off 60 times. I've seen a lot of people on YouTube and forums swearing they are chopping 3 to 5/10ths off their 60 time.

[G30M]

Originally Posted by ztech

I just had someone install it today. He was able to hide the device and wires nicely behind the dash and carpet - looks completely stock.

The Dinan Throttle Booster has several preset modes with different throttle sensitivities: ECO (80%), STOCK (100%), DRIVE (150%), SPORT (175%), EXTREME (200%), and a CUSTOMIZED OPTION , all of which can be fine tuned.

So I set it to SPORT, and I can immediately see the improvement at parking lot speeds. Normal driving is much more enjoyable, as I get much more responsiveness. When you take off from a stop, the car doesn't feel like it has to think a second, before it pulls away.

I tried EXTREME, and its even better. Doesn't feel jerky in the sense a lot of people might think. It's all very smooth.

I want to play around with the settings and my xhp transmission settings, to get it just right.

As far a normal everyday driving goes - it's a must (if you can't get your tuner to address throttle response). Honestly, feels like a 20-30hp gain- more impressive than a lot of tunes out there. Regarding performance gains, I would be surprised if it doesn't yield ,at least, 2/10ths of second off 60 times. I've seen a lot of people on YouTube and forums swearing they are chopping 3 to 5/10ths off their 60 time.

thanks

i always find that my 2007 Toyota V6 NA 6-auto with a wire throttle is instantly responsive compared to all the BMWs. they stupidly design a rubberband software into the throttle pedal for emissions

from my testing you can eliminate this rubberband sometimes by stabbing the pedal instead of gently squeezing it but it's not ideal

the product to trick the computer and eliminate the rubberband proves this

[Skip_bot]

I experience the same thing about throttle response from a dead stop. In my opinion it’s about a half second delay but it’s due to the engine not having the turbo spooled up at a stop, so boost doesn’t kick in until a half second later, and by about 1 second you are at full boost (and full shoved in the back of the seat mode). First gear is so low in this car, I am actually pretty impressed by how much shove it gives you for being only a turbo 2.0L engine.

At speed, I find the throttle response is actually excellent for a turbo car. I will generally put it in sport mode often when driving around (I only do comfort mode when feeling lazy), because that does wonders for getting the engine to boost quickly, and I feel it downshifts immediately when punching the throttle. Also, the mid range torque is amazing, I’ll do backroad pulls coming out of a curve in 3rd or 4th gear in manual mode, and the car just surges on boost so effortlessly.

My previous car was a naturally aspirated high revving engine (Nissan VQ37 engine) which had more power on paper than the 330i, but the torque of the 330i is higher so the car feels faster to me in daily driving. Throttle kickdowns at speed are quicker too in my opinion. The only lag I notice that my previous car didn’t have, is from a dead stop, but I just recalibrated how I use my right foot.

[bimmer456]

Originally Posted by upsidedownfunnel

It's most likely an issue with the boost threshold that you're feeling. The "throttle response" issue you're feeling might also have to do with emissions control that gradually opens the throttle plate to prevent running lean and more emissions.

Either way, your new 330i is almost definitely faster than your E90 330i. Your old car just didn't have the problems with boost threshold and turbo lag your current car does.

By the numbers, your old car did 0-60 in 6.2s and the new car does 0-60 in 5.2. Even more, the G20 330i does 5-60 in 6.4s. I couldn't find 5-60 figures for the E90 330i, but it is probably around the 7 second range. So even without spooling up the turbos, the G20 is still faster.

I'm not sure where you get the idea that BMW is "severely under powering" the B48. It's consistently one of the faster cars in its class (2.0T 4 cylinder compact luxury cars). If you want more acceleration, you would have had to go with the more powerful car. I don't know any 4 cylinder car in this class that goes any significant amount faster than the 330i.

The Corolla 3 cylinder makes 300 hp and has all wheel drive might be close to if not faster than 330ix.

[bimmer456]

Originally Posted by VipinLJ

The only fix I can think of is a pedal box like sprint booster or something that alters the throttle map. Not sure if one is available for the G20 but yea.

You can enable sport plus mode like the euro cars have to get better throttle response from a dig. The 330 does have a bit of lag in sport.

[ztech]

I played around with the custom settings aiming to increase the slope, maintaining a linear profile. The way its set up now, there is very minor hesitation. The car comes off the line softly (maybe up to ~10 MPH), and then car surges forward smoothly, like it's being pushed off of a giant spring. Such an astonishing difference in performance. At this point, any further tweaking will just be nitpicking, on my end. Here is my settings: