Why is my 0-60 so slow : (

[Tom K.]

Originally Posted by Lucky1

How fast do you think it should be? I'm pretty sure BMW used to quote 0-60mph for the auto in 7.0, you aren't far behind. The automatic on the 128i isn't as good as the 135i. Also, are you using precise instrumentation for testing your time?

The bmwusa.com website indicates 6.1s/6.7s manual/auto.
I'm pretty sure those aren't the original numbers they put out when the car was released.

IIRC, the 6.1/6.7 figures were the ones quoted by BMWUSA back in 2008 when the 128i was introduced in the US.

Since BMW's figures are generally conservative, the OP could probably improve with better technique, albeit at the expense of long-term reliability.

Tom

[Greenkirby21]

thank you guys for all of your help! i do not plan on drag racing or anything, I just found it surprising that it was so difficult to get to the 6 second area ^_^.

[LA-Bimmer]

Originally Posted by B_2_B_P

http://www.gtechpro.com/ss.html#

Seriously? This can read all that including HP and Torque from the cig lighter? Any one have this? Is it accurate?

I've got one that I have used in my GT500 at the track and compared to dyno runs. At the track (1/4 mile) it varied only .04-.09 seconds from the formal timing. Power estimates can vary more (just as dyno's do) and are impacted by traction as well. Average of 3 G-Tech estimates was 674rwhp. Average of 2 different DynoJet was 692rwhp. 5% or so is not too bad, but you have to be consistent. If the road you are on is a slight decline/incline, the data will be less accurate. I find it a fun toy. Have never used it in the BMW.

[FJUNO78]

if you used your speedometer, assume that you were slower than 7.3. Our speedometers read a bit faster than the actual speed of the car.

why not run a 1/4 mile? 0-60 is not really a choice bemchmark.

good luck

[italiantank26]

Originally Posted by e90sexion

we can't expect too much from 128i can't we.....

I posted this link a while ago, but this what you can expect from a 2008 128i, 0-60 between 6.0-6.2 secondshttp://www.youtube.com/watch?v=PASVbTR0uXA

[supraking]

Ermmm... for those who think 2nd gear is "faster," it doesn't work like that. You're actually making better use of your engine's torque in 1st gear all the way to redline and then shifting to 2nd rather than shifting at lower RPM or starting in 2nd (what?). There's a big thread about this in the track/racing section.

Now, as for your run... it has to do with tire pressure, temperature/humidity, weight, wheel spin off launch, time to shift, etc.. I'm not sure if the shifting is quicker in the autos when DSC/DTC are completely off, but I would imagine it is (or Sport mode or wtv).

At the end of the day, a good launch with little or no wheel spin and fast shifts will get you the best time. It's tricky and your clutch will die while you practice, so don't bother. Learn to steer around corners instead

[UdubBadger]

Originally Posted by B_2_B_P

http://www.gtechpro.com/ss.html#

Seriously? This can read all that including HP and Torque from the cig lighter? Any one have this? Is it accurate?

I haz one. I hit 5.97 sec 0-60 in my 328xi. They work, I did a run before I got my ECU flashed and 1 after and it was 2 hp off of what they dynos said.

[Lucky1]

I also noticed the OP is from Texas. How hot was it when you did that 0-60 run? Just throwing out other ideas here but from what I understand temperature can have an effect on your car's performance. Does it get any faster at night when it is cooler?

I see you have the sport package. Do you have any "heavy" options like power seats, sunroof, etc? These all add weight and my general assumption would be BMW's numbers are done with a stripper, bone stock car. Carrying any cinder block around in the trunk?

[mosx]

Originally Posted by K03sport

Also, was the car fully laden?

Also is it an African or European swallow?

[Zeru796]

hello all, i was just looking up the quarter mile time of the 1 series and came across this forum. i personally own a 1995 m3 5sp and love it, you guys should switch to one lol. i bought mine for 11000 3yrs ago and have done some mods since. ive never tested my 0-60 time but it says 6.2 and 14.6 1/4 mi bone stock. with mine stock i ran a 14.4 1/4 mi time and am waiting to test it out with my new intake, intake booster, and performance chip stock it has 240hp and with that stuff it should have between 285-295hp i cant wait, its been sitting in the barn waiting for nice weather and im getting anxious the one series looks real nice and the new 1 series m coupe looks amazing. good luck to all with their bimmers

[MikeinAlexandria]

Are you using the throttle kick down feature? Press the fort peddle ton the floor, and then press harder and it will throw the engine and transmission into kick down mode. You might get a little bit more acceleration with that. Also, try (as mentioned) shifting T 6000rpm.

[amancuso]

Originally Posted by e90sexion

we can't expect too much from 128i can't we.....

[BSM 335I]

Wow it amazes me the difference in shift times between the GM and ZT transmissions. I bet if they had put the ZT in the 128i it would've been 6sec passes back to back.

[Greenkirby21]

ya, im pretty sure its the crappy transmission. I don't like this slushbox >_>. Should have gotten a manual.

[strati1]

i pull solid mid 6's in my auto 128i two footing it, dsc off, shifting at 6k in 1st and......with 245 ps2s in the rear

[dorkdog]

Hi,

I stand at the sidelines watching this - wondering why 0-60 is so important. It is to me, too, but only academically as I struggle for a way to measure this.

Here is my plan, but first a question: If the BMW speedo is not accurate (mine isn't) then how to determine true 0-60? My GPS typically reads speed 10% slower than speedo. So aren't all the folks using the speedo as a reference introducing this error into their calculations? Or is my 128i the only one with a speedo error (I think not; my Z3 and MINI had the same error - in roughly the same proportion)

So... to my plan. I am going to video the acceleration with my gopro, and use the timeline in my video editor to determine the amount of time between the onset of motion and the GPS version of my speed reaching 60, both of which will be easy to detect on the video.

What do you think of this approach?

What concerns me is that BMW is possibly basing their spec on 'indicated airspeed' rather than 'true airspeed' which would, in my case, result in a very optimistic number for 0-60 in terms of a published specification.

And, as a side-note, if the error is being introduced as part of the 'distance' in distance/time, would it not also taint the miles/gallon calculations? Range calcs?


Maybe I think too much... as Styx put it so aptly, "Too much time on my hands"...


LJ

[jkoral]

Originally Posted by dorkdog

If the BMW speedo is not accurate (mine isn't) then how to determine true 0-60? My GPS typically reads speed 10% slower than speedo. So aren't all the folks using the speedo as a reference introducing this error into their calculations? Or is my 128i the only one with a speedo error (I think not; my Z3 and MINI had the same error - in roughly the same proportion)

[snip]

What concerns me is that BMW is possibly basing their spec on 'indicated airspeed' rather than 'true airspeed' which would, in my case, result in a very optimistic number for 0-60 in terms of a published specification.

And, as a side-note, if the error is being introduced as part of the 'distance' in distance/time, would it not also taint the miles/gallon calculations? Range calcs?

The SI bulletin is below for maximum permissible speedo error (10% + 2.4mph). Here is a good article explaining why: http://www.caranddriver.com/features...ometer-scandal

The actual speed/distance from the VSS is used for the distance/odometer, so that remains accurate. You can have coding done to display the VSS speed digitally in the cluster, or for a 135i, you can display the actual speed in the P3 Boost Gauge which it pulls from the OBDII canbus.

I *assume* the OBC uses this value for it's mpg calculations as well.


SI1996-620296 SUBJECT:
Maximum Permissible Speedometer Error

MODELS:
All

General Information:
A certain amount of "speedometer advance" is necessary to compensate for negative tolerances in tire diameter, electronic controls, and other factors. This advance reduces the risk of the speedometer displaying a speed that is less than the vehicle's actual speed.

The amount of speedometer advance can be calculated by inputting a frequency (using the DIS Tester, "Kombi Test Schedule") that corresponds to a given speed and noting the speed that is indicated by the speedometer. The maximum permitted speedometer advance is 10% of the actual (input) speed plus 2.4 mph.

Example:

Actual Speed = 50 mph

50 mph x 10% = 5 mph; 5 mph + 2.4 mph = 7.4 mph

Therefore, the permissible displayed speed is 50 to 57.4 mph.

(Note: The displayed speed must never be less than the actual speed).

No repairs should be attempted if the speedometer advance is within 10% + 2.4 mph.

NOTE: The amount of speedometer advance has no effect on recording of accumulated mileage in the odometer display. The odometer records total mileage digitally and does not incorporate any "advance" tolerances.

Warranty Status:
Information Only.

[strati1]

.

[alvitdk]

Originally Posted by e90sexion
we can't expect too much from 128i can't we.....

Originally Posted by amancuso

Yeah, there are always those......how should I say.......