Screen could be an interesting thing to try.

 

I think the main influence is the intake at this point but it seems as if the CPs have some effect as well.

 

Dang...those were the two upgrades I was thinking of making after the learn down is removed with Stage 1...

I think I just need to stay patient and see what GM gives us...

 

Did you adjust the calibration table or the correcton table?

 

I am adjusting the correction table at the moment. However, after doing some logging after work I am going to try the calibration table. I found a histogram calibration that will log your MAF's airflow vs. the MAF's frequency and plot it against LTFT, it makes it easy to make adjustments. Not exactly sure which table is the correct method honestly.

I will be going to the dyno in about 20 minutes for some real world results for the Injen intake.

 

You subtracted 0.04 from all the values to go from negative 7- to -3.

 

Yes sir! Should it be this easy? Something just feels fishy here if so many people are having skewed MAF readings...Is this table just a band-aid of sorts?

 

It can be that easy sometimes.

 

Man I'm blowing this thread up haha. So is there any significance between the two tables? (Correction vs. Calibration) Or is it simply two different methods for adjusting the MAF readings?

 

Two different methods of adjusting the MAF. Frequency vs airmass (mainly for the STFTs). Correction factor corrects the MAF based on RPM and load (more for LTFT calculations), but if you can manage to get the STFTs close to zero using the calibration table the LTFT will fall into place as zero as well.

 

disappointing results:

326whp and 329wtq

I gained about 10whp but lost over 10wtq....And worst of all that gain in HP is peak, for the majority of the powerband HP is lower than with the stock airbox.

temp was 107 degree vs. 88 previously....But I doubt that's has a lot to do with the torque loss.

 

Thanks for posting up your findings.

 

what was the difference other then temp between your gain and lost... did u have stock intake then put injen on?

 

Just the intake and MAF calibration. However, I slapped the tune before I calibrated the MAF on the ECM and it didn't make a difference...So I know it isn't attributed to that.

 

so with injen intake you gained peak hp but loss torque

 

That's the way it appears. But worst of all, I didn't see any gains in HP until near 4,000 RPM....I lost power (HP and TQ) under the curve in addition to overall torque.


I think, at least in my opinion, that the book is closed on CAI's for me. The stock box is going back in.

 

im with you on that my hahn is showing 11% extra fuel

 

I gained HP and lost no tq with the AEM intake. But it was on a different dyno if that makes a difference

 

would taking the flaps out of the stoc air box cause this problem also?

 

Sigh...this car is such a finicky bitch. The more and more I read the more and more I'm completely happy with a tune and nothing else, not even CP's, so long as my stockers don't explode.

 

Anything to help everyone out!

 

This has turned into a great thread, and just about closed the book on buying an intake for me.

Hell, at least I will save $300 bucks.

I got my catted modpipe ready to install from Hahn. Waiting on this god damn GM tune...

 

I went filter-less for a short drive and because the airflow was not as strait as with the airfilter it it skewed the reading another 3-4%. This car is so finiky about intake mods.

I let my car warm up until the coolent temp is 194 like normal and log the average values.

 

I wonder if a K & N drop in filter and removing the air box resonator will do the trick?

 

You mean the intake snorkel?