turbo lag

[SixBanger]

With having just an Eisenmann exhaust and BMW software what can I do to get rid of some turbo lag? I remember when I first bought my car it had no lag at all! Now it just sux!
Myles

[Dackelone]

When you say: "bmw software" do you mean the update with the added lag?

IF that is the case I would get a PPK1 or tune to fix that. Then I would ditch the OE mid pipes for the N55 catless mids(IF your car is a N54 - as I assume). ?

[SixBanger]

Originally Posted by Dackelone

When you say: "bmw software" do you mean the update with the added lag?

IF that is the case I would get a PPK1 or tune to fix that. Then I would ditch the OE mid pipes for the N55 catless mids(IF your car is a N54 - as I assume). ?

The Performance software, "the flash"

[JefryHorizon]

An intake would help as the stock air box is pretty restrictive especially with a tune added already.

[Boosted_N54]

Originally Posted by JefryHorizon

An intake would help as the stock air box is pretty restrictive especially with a tune added already.

what intake is best? for better flow

[ken1137]

Originally Posted by Da _Grk_Tuner

what intake is best? for better flow

I like Injen DCI...bought from ER, or the Mr 5 Intake.

[Boosted_N54]

Originally Posted by ken1137

I like Injen DCI...bought from ER, or the Mr 5 Intake.

what about AFE s2 air box

[SixBanger]

what about hydrolock?

[ken1137]

Originally Posted by Da _Grk_Tuner

what about AFE s2 air box

Oh yeah, forgot about that one. I was actually considering the aFe after Harold's post, but went with the Injen instead.

[JefryHorizon]

I'm running DCIs just because they're cost effective but if I had to redo it I'd go for the Mr.5 just for kicks!

[EFI Logics]

Like Dackelone said, it sounds very possible that your newfound turbo lag can be from the BMW software update.

Here is a quote from an article on Autoblog related to the class-action lawsuit against the N54:

"According to the law firm, the problem with the turbochargers is that defective examples cannot run at full capacity, resulting in strange noises underhood and noticeable throttle lag. BMW had initiated a software update, which made it so the turbochargers were "fixed," but apparently all they did was stop the turbos from being allowed to run at full tilt. This, in turn, resulted in a loss of power and noticeable lag, one of the very issues the N54's architecture was designed to eliminate."

-Josh

[NYC6]

This deceptive move by BMW will prevent me from ever purchasing another one of their vehicles. Sneaky, low down move BMW.

[ken1137]

+1 ...if it is turbo lag then a tune (PPK) will help. Cobb AP is recommended if you plan to mod.

[Freon]

I don't see why a turbo not being able to run "full tilt" would have much to do with software having to add lag. It would explain a loss of top end power, perhaps if they were trying to keep turbo speed in check.

Turbos are running "full tilt" (highest speed) at full power, at high RPM. Also, if the turbos were really having issues all of us running them at 12-16 psi would be blowing them.

I would sooner blame any reprogramming lag due to emissions concerns, or something else like that. The "full tilt" explanation doesn't add up.

It's very possible that right after a reprogram the ECU has to relearn fuel and timing trims, and the car may seem more laggy initially when you drive it off the lot after your service. Also, when you tune the car and you're now targetting 12-16 psi at 2500-5000rpm instead of 8psi, it just takes longer to hit that boost. Even if the turbos are hitting 8psi sooner, you have further to go. I know my car felt laggier in a way after the tune, though I would hazard a guess that I I do not hit 15psi on the Cobb faster than the stock tune hits 8 psi.

[ken1137]

Maybe the OP needs to try to reset the ECU (?).

[SixBanger]

My lease is coming to an end soon. I love BMW alot and I've owned 4 in the past, but should I send an email to the aftermarket guy at my local dealer and express my concerns that have been jogging my mind for years or save my breath and select a new car manufacturer?

[BrokenVert]

Originally Posted by JefryHorizon

An intake would help as the stock air box is pretty restrictive especially with a tune added already.

This is incorrect. Dont listen to this.

Most tests show that DCIs lower performance in a number of ways. Theyre only for some added noise and woosh. As far as performance gains, you actually get the opposite

[JefryHorizon]

Originally Posted by BrokenVert

This is incorrect. Dont listen to this.

Most tests show that DCIs lower performance in a number of ways. Theyre only for some added noise and woosh. As far as performance gains, you actually get the opposite

So the only effective solution is intakes with a cowl or the Mr.5?

[BrokenVert]

Originally Posted by JefryHorizon

So the only effective solution is intakes with a cowl or the Mr.5?

if you absolutely need an intake, then yes. But, for nearly every purpose that you can think of the stock intake is actually really well designed.


And if you really want to think about it of all the limiting factors in the design of the N54, the intake should be one of the last things on the list to upgrade if you want crazy power

[SixBanger]

After waiting for BMW to answer back on my paint issues and rock chip on my bumper, they said no to fixing any of it under warranty. As soon as my lease is up I'm done with BMW. I've owned 3 BMW cars previous to my 1, and never ever had issues like I did with my 1 series. Between the HPFP issues I had and other symptoms from this issue, and now paint issues I'm done with them.

[SixBanger]

After bringin the car back for the 3rd time for laggy acceleration this is what they did:

4401 West Sample Road
Coconut Creek, Fl. 33073

Job #4
PROBLEM D CLIENT STATES WHEN ACCELERATING THE CAR FEELS LIKE IT LAGS
1161550 REMOVED AND INSTALLED INTAKE MANIF (N/C)
1 11-61-7-547-242 SET OF PROFILE GASKET (N/C)
1199000 CARBON BLAST AS PER PUMA (N/C)
0000556 PERFORMING VEHICLE TEST (N/C)
43416
CARBON BUILD-UP ON VALVES
ROAD TEST VEHICLE. WAS ABLE TO DUPLICATE CONCERN. HOOK UP TO ISID AND
CHECK FAULT MEMORY. NO RELATIVE FAULT PRESENT. REMOVE INTAKE MANIFOLD
(OP#11-61-050) AND INSPECT INTAKE PORTS AND VALVES. FOUND EXCESSIVE
CARBON BUILD UP IN PORTS. SUBMIT PUMA CASE#: PERFORM INTAKE
PORT CLEANING PROCEEDURE (OP#11-99-000) AS PER PUMA. DEFECT CODE
11-34-00-76-00. REASSEMBLE AFTER PORT CLEANING AND ROAD TEST. VEHICLE
PERFORMING PROPERLY AFTER REPAIR

Job #6
PROBLEM F PLEASE DO NOT PUT THIS VEHICLE THROUGH THE CAR WASH.THE CUSTOMER HA
NOWASH2 PLEASE DO NOT PUT THIS VEHICLE THR (N/C)

Did it fix it. Not really : (

[cadeucsb]

Originally Posted by BrokenVert

This is incorrect. Dont listen to this.

Most tests show that DCIs lower performance in a number of ways. Theyre only for some added noise and woosh. As far as performance gains, you actually get the opposite

Not disagreeing but most of these posts are the same...Claims a certain side of an argument without any reference. What tests are you referring to? Assessing the gains of a DCI is almost impossible. A dyno on a stationary car is a meaningless test in this scenario.