What parameters to log for suspect low power?

[QueenCityLurker]

Hey ya'll.
I'm wondering if those more experienced with logging can advise me on which MHD parameters to log my car with to help determine why my car feels down on power.
Here's some details:
2009 135I
catless DPs
7" IC
charge pipe with Tial BOV
MHD Stage 2 plus
XHP Stage 2 trans tune

Backstory: Car was originally stock and I flashed a MHD Stage 1 and drove it like that for about 6 months or so. Car felt strong and ran great.
Eventually went Stage 2 and had Dynamic Auto Tune in Charlotte NC install the DPs, IC and charge pipe.
Immediately after picking up the car I noticed it didn't feel any faster. At all. Which is odd. Everyone I spoke to who owns a Stage 2 N54 says there is a noticeable difference between Stage 1 and Stage 2, so I'm on the hunt to try and figure out where my missing / lost power is.

I'm suspecting the usual: Either low pressure fuel pump on it's way out or a boost leak somewhere.

So what parameters should I be logging to try and help me hone in on my issue?
Much thanks for any help.

QCL

[QueenCityLurker]

Forgot to mention I also did brand new plugs (step colder) and ignition coils when I went stage 1, so they had about 350 miles on them before going stage 2.

[iminhell1]

"Feel" isn't a good metric.

Track data, Draggy data, previous datalogs. Those are what you need to compare to.



But just log the preset data and post it up.

[QueenCityLurker]

Originally Posted by iminhell1

"Feel" isn't a good metric.

Ok now that you've completely invalidated my means for how i've interpreted power levels with my car, do you feel better? This isn't helpful dialogue at all. LOL.

Track data, Draggy data, previous datalogs. Those are what you need to compare to.

I agree 100%, which is why I'm here specifically asking for someone to provide guidance on what parameters I should be logging with MHD. No one in this thread is talking track, Draggy or previous datalogs. I'm specifically looking to create a zero point to datalog. Again, not helpful dialogue at all, but if you feel better after declaring what rules supreme from your high horse, by all means my guy, have at it. I'll even pet and feed your high horse if it makes you feel better.

But just log the preset data and post it up.

Now we're getting to something with substance. Thank you.
So are you guys logging 3rd gear or 4th gear pulls in 135Is with the auto?

[AndyW]

If you are looking for "pre-limp" mode power cuts, my tuner just told me to log tq limit parameters.

[QueenCityLurker]

Originally Posted by AndyW

If you are looking for "pre-limp" mode power cuts, my tuner just told me to log tq limit parameters.

Thank you! When you log are you logging a 3rd or 4th gear pull>

[AndyW]

Originally Posted by QueenCityLurker

Thank you! When you log are you logging a 3rd or 4th gear pull>

I've logged in both. 4th is closer to 1:1 on my DCT car.

[mKilgore]

Since you are running MHD, just log everything. At this point, when trying to figure out a problem, more data is never a bad thing. You, or your tuner, can pull out the data that is needed to look at or compare, but since you don't know what data you need, it is better to have too much than not enough. Just go in to the MHD app and check all of the boxes for data logging parameters.

[QueenCityLurker]

Originally Posted by mKilgore

Since you are running MHD, just log everything. At this point, when trying to figure out a problem, more data is never a bad thing. You, or your tuner, can pull out the data that is needed to look at or compare, but since you don't know what data you need, it is better to have too much than not enough. Just go in to the MHD app and check all of the boxes for data logging parameters.

MHD limits the number of channels you can log. So unfortunately you cannot check everything.