HP Tuners for 2005-2015

Okay so I'm officially revisiting the 3.5 intake tube mod again. I got a 3.5 MAF adapter with an integrated honeycomb straightener integrated into it, an AEM Dryflow 3.5 filter in black, and a 3.5 to 3" silicone 45* elbow... I will let y'all know when the parts begin rolling in. Excited to finally put some of this whole "running out of MAF GM/S" thing to rest.

 

Got a link that talks more about this? New to me curious a about this mod. =)

 

It's a mod within a mod. I am using the URD ram air intake and am running out of MAF headway on the 3 inch tubing. The MAF tops out so some weird stuff is happening to the running condition of the truck under boost. I thought we'd be good with re-scaling the MAF but come to find out the truck is still knocking under various instances. Changing the tube diameter from 3 to 3.5" at the MAF shortly before the intial bend of the intake occurs and then going back to the 3" tubing will take care of the additional airflow that the 2.3 pulley creates and will fix my knocking under certain instance load issues I've been having.



This was the setup I was going to run. This was prior to HP Tuners, however, and I gave up on the project as I didn't anticipate the change in tube diameter size would make the truck run so horrible without tuning.

 

ah fun times! I guess we will see how it goes.

 

See edit to quote.

 

Shoot- Iv'e maxed out the 3.5" tube. Time to visit the 4.5"?

 

Your 4.5L cammed 1GR doesn't count Kelby.

 

Honestly, I am very curious what your max g/s are? Going to have to be close to or maxing out the range on that MAF sensor.

 

Wish I could give you guys some of mine. Logged last week at 8900ft N/A I'm seeing 155g/s. LOL! Up from stock considerably, though.

 

For those fine tuning their MAF I have created an Excel doc to help with! I'll post it when I get home from my trip

 

Gotta love elevation. I'll go up to Mammoth 8k+feet for a weekend and then come home feels like I added a v8!

 

so i am halfway through wiring in my aem wideband into my GM ecu with custom maths on the AC pressure circuit for HP tuners to read and log without the Pro link. anyone care to give it a try on a taco if you have an unused 5V input. sai or egr maybe? fingers crossed once the kids wake up i can start the car and see how it goes. im E85 only so i have the maths for pump and ethanol relevant to the aem gauge. although i think there is a paramter change u can do in user defined maths to scale one to the other with whatever equation you chose to run

 

As promised the doc! My thought process on maf tuning with respect to LTFT's. Start with a singular gross adjustment across the whole 2d airflow to volts table, move to finer individual cell's in the 2D airflow to volts, then finally move to the 3D MAF correction table.

1. Log a few different trips, insert necessary data into the 2DMAF-LTFT helper doc change the entire curve by calculated total weighted percentage in the airflow to volts 2d graph in the tune
2. Flash and log some more
3. Insert new data (making sure to remove old data) into the 2DMAF-LTFT doc, change individual cells in the 2d airflow to volts based on percentages calculated in the "LTFT by V" column
4. Flash and log some more
5. Move onto the 3D maf correction table.....

This doc is is for steps 1-4, I'm currently at step 3 in this process.

You will need to create this graph in VCM scanner so you can highlight and copy the data out of VCM scanner and pop into excel. The "Long Term Fuel Trim (sensor)" is a conglomeration of both banks averaged so you dont need to do anything fancy for math equations. The axis' of the graph are the volts from the 2d airflow to volts table and the RPMS axis from the 3D maf correction table. I have attached the .table file so you can easily load this in the VCM scanner.



The Doc

It has 5 sheets. 4 labeled LTFT. Those are sheets you put your data from your logs in. (you dont need to put data in every LTFT sheet, just did 4 sheets so you can average 4 Log files) The 5th sheet TOTAL does weighted averages of everything you put into the LTFT sheets and creates necessary data to change in your tune. FYI-I left data in LTFT1 so yall can see whats going on.

Questions, comments, concerns, hate mail, praise, beer????.... Feel free to let me know!

 

So many thanks. This is my nightly study homework.

 

I received my intake filter and shield yesterday night... I am just waiting for my elbow and the 3.5" housing. I should have everything by Wednesday at latest.

Just wanted to give you guys a heads up @JustDSM @mightytacoman

 

Absolutely! Let me know what you think and if you have any questions. Going to flash my first round of changes via step 3 tonight. For all intents and purposes my airflow:voltage has been raised 3% at 1.95v and lower, ramped between 1.95 and 2.27v up to 6% higher through the top. I had started with 4% across the board, then after logging LTFT's, below @ 1.95v and under were ~1% neg, and 2.27v n above were still ~2% positive. So easy peasy, go in, highlight the values and do a simply multiply of 0.99 for neg, and 1.02 for pos upper values.

 

upon initial startup are there any sensors that aren't read/used? my truck starts great but after 20 or so seconds it has a bad miss. then after it hits 130* and i turn off then on, it runs great again. I've replaced pretty much every sensor but still having the issue. just trying to narrow down what the hell it could be.

 

Don’t want to start a war but is anything over 3” Intake necessary? I mean after the throttle body I feel like that size isn’t any bigger. Smaller if u ask me. So it won’t flow any better unless you get a different supercharger.

 

That all depends on the setup. But yes. Some setups are moving enough air that the mass airflow sensor cannot measure the actual mass of air entering the engine, causing significant fueling issues.

 

Does it start idling real low after that 20secs/ do lots of idle fluctuations? Could be a sticky throttle body as there is a startup idle air adder that decays overtime.