[Antoniogaj]

So I finally got to logging my car today, although I don't know how to read a log so I was hoping for some help from you guys.

To begin I'll add some info about my car:
2010 335i xDrive AT with 20,000 miles

Mods:
JB4 G5 ISO
VRSF DCI
VRSF 3" Catless Downpipes
VRSF 7" Intercooler

Fuel used was 93 octane with 4 gallons of e85 mixed in.

One thing I did notice about the log was that my targeted boost at 2200 rpms is 16 but only hitting 3. Could anyone verify?

Here's the log: http://datazap.me/u/antoniogaj/log-1...log=0&data=1-4

[Sambonjo]

I'm not skilled at logging but I think the difference between target and actual boost at 2200 rpm is due to the fact that boost is not instant. It takes some time for the turbo to spool up and deliver full boost. Someone else might be able to chime in and say if you are delivering boost slower that what you should be given your mods.

[Antoniogaj]

Originally Posted by Sambonjo

I'm not skilled at logging but I think the difference between target and actual boost at 2200 rpm is due to the fact that boost is not instant. It takes some time for the turbo to spool up and deliver full boost. Someone else might be able to chime in and say if you are delivering boost slower that what you should be given your mods.

Sounds about right. Can anyone else confirm?

[cmg5461]

Originally Posted by Antoniogaj

Sounds about right. Can anyone else confirm?

1.6 seconds for 15 pounds does seem a little slow. I did just notice that you started your pull at 2k rpm. Try starting at 2.5k, boost will build MUCH quicker.

How old are your turbos? I had 82k on my turbos, and the difference was night and day when they were replaced. I couldn't build stock boost before 3k rpm. Getting the car back, I could build boost in 6th gear, starting at 1500 rpm by 1800 rpm.

Boost builds by the expansion of exhaust gases. It builds faster when fueled when open throttle vs. partial throttle.

Your avg ignition looks great. Timing looks good. You should be maxing out map 5.

FYI, enter 4 or 5 into 6-cyl timing logging to log timing on all cylinders. I use 4 and I have an early 2008. 5 doesn't work for me. 4 or 5 depends on which version of DME you have.

[Antoniogaj]

Originally Posted by cmg5461

1.6 seconds for 15 pounds does seem a little slow. I did just notice that you started your pull at 2k rpm. Try starting at 2.5k, boost will build MUCH quicker.

How old are your turbos? I had 82k on my turbos, and the difference was night and day when they were replaced. I couldn't build stock boost before 3k rpm. Getting the car back, I could build boost in 6th gear, starting at 1500 rpm by 1800 rpm.

Boost builds by the expansion of exhaust gases. It builds faster when fueled when open throttle vs. partial throttle.

Your avg ignition looks great. Timing looks good. You should be maxing out map 5.

FYI, enter 4 or 5 into 6-cyl timing logging to log timing on all cylinders. I use 4 and I have an early 2008. 5 doesn't work for me. 4 or 5 depends on which version of DME you have.

The car has 20,000 miles so the turbos aren't old at all. Although, the shop that put my downpipes in told me that the turbine is grinding against something. I don't really recall what they said it was grinding against. Maybe that's the problem? And my turbos are about to go soon?

[335NJ]

Originally Posted by Antoniogaj

The car has 20,000 miles so the turbos aren't old at all. Although, the shop that put my downpipes in told me that the turbine is grinding against something. I don't really recall what they said it was grinding against. Maybe that's the problem? And my turbos are about to go soon?

If he's saying the compressor wheel is rubbing/grinding on something, then you need to get that looked at.

[mike@x-ph.com]

Boost looks normal to me.
Your LPFP is suffering though, hitting 40 at some times. I would keep an eye on it.

[335NJ]

Originally Posted by mike@x-ph.com

Boost looks normal to me.
Your LPFP is suffering though, hitting 40 at some times. I would keep an eye on it.

I'm on mobile so can't really see logs too well, but if that's the case, OP you should try lowering your E85 amount by a bit and see if the LPFP responds nicely, or buy an inline option.

[Jeff@TopGearSolutions]

Originally Posted by 335NJ

If he's saying the compressor wheel is rubbing/grinding on something, then you need to get that looked at.