HP Tuners How-To's

[camarochevy1970]

Guys, here is the procedure I have been following when idle tuning an LS2 car with cam or whatever upgrades that warrant having to fix the idle.





LS2 Idle Tuning:

- Set your idle to whatever you would like it to be (be reasonable)

- Increase base spark in idle cells (Doesn’t mean to entire table) to at least 25 - 35*, for big cams, for small cams, add 3-5* to entire idle spark table.

- Unlike gen 3 idle tuning, start with a warmed up engine. Turn AC off.

- Under Idle, Idle Airflow, Base Running Airflow, zero out the entire Airflow Final Minimum table. (Min RAF). This prevents the PCM from predicting any minimum airflow which would prevent you from finding the real minimum.

- Set idle adaptive spark control overspeed and underspeed tables and adaptive idle proportional and integral tables to stock. (If they were modified in any way, download a stock tune for your car from Hptuners.com, and use the compare function to verify they’re stock).

- Save the file, and flash the PCM with this settings.

- In your driveway or garage, start the motor and in VCM controls, set spark idle control to "On" which really turns idle adaptive spark off. Command the different RPM's in the table; 650, 800, 1000, 1200, etc. You can only command up to 1200 RPM's in the VCM Controls with the up and down arrows. For 1600...3000 you need to type the RPM in and un-select and re-select "On". Using histogram 10 on average (A), log airflow against the final idle airflow minimum table. The idea is to command the lowest RPM in each range so you would find the minimum for each. Simply using the (L) feature of the histogram doesn't yield good results.

- Paste these numbers directly into the Airflow Final Minimum table for all gears (for auto guys you may need to do this twice, once in park and once in gear w/ the e-brake on). Then subtract 10% from the whole table (select all and multiply by .9) and re-flash.

- Restart the engine, this time do not set the idle spark control to "on". Log idle adapt advance against the final idle airflow minimum table with histo 11 using the average (A). Command the RPM's again, just like before. Copy and paste these numbers (paste special, multiply by %) into the appropriate cells. (again, auto guys will need to do this twice) Rinse, repeat until the adaptive spark numbers are +-1 degree.

Note: Histo 10 and Histo 11 are in _Idle Tuning.cfg
i zipped the file up, so just unzip the file and place it in your Hptuner scanner config file folder, then just open you vcm scanner, open the config file, and tune away.

[camarochevy1970]

Here is a spreadsheet to help you figure out what to put into HP Tuners to make them work

Just unzip and run the Excel file. I couldn't upload the XLS directly

[Kingsize]

Thanks for both of the files!

[camarochevy1970]

oh, we aren't done yet I am waiting for my threads to get merged and then I have some more stuff to add

[Kingsize]

PM Sent

[camarochevy1970]

got it, no issues, I will help you out

[camarochevy1970]

Here is how you adjust your tune for the new engine

http://www.mediafire.com/file/atnmym...mentchange.doc

[Kingsize]

Strange, I don't know if you noticed or not but the calculation for cylinder volume in the stock LS2 6.0 364 ci tune is 0.70819 when it should be 0.74995. Seems the calculation is for a stock 5.7, 5.66 to be exact.

[camarochevy1970]

You are right, I had never noticed that, and it is kind of odd. However, I don't think this has too much to do with the overall tune, as I have read of people who have gone to 408's or larger and forgot to adjust that and their car ran fine....

[dkrowner]

thanks for all the info on tuning,i'm using EFILive V2 myself but in the end it all does the same thing

[Trents_goat5.7]

Thanks this will be good info to have when I get HPtuners this Christmas.

[camarochevy1970]

I have used this to keep me on track when tuning, and it certainly is a good document to start learning how to tune.

I tried to find the original author before posting it, but was unable, and since this thing has been passed around like highschool prom date, I figured what could one more hurt

http://www.mediafire.com/file/mxk4ynj2tyi/HPT TuningGuide 16JUL07.doc

[BillsMafia]

Great info!!!

[Nimrod_R]

Nice job....

[ameaglemike]

Wow nice write up. Hopefully I'll get HP eventually. But without a laptop, kinda up a creek...

[BlownGoat]

Good info guys!! helping me out i just got hp tuners and with the info from here im already on the right track

[ct06gto]

I have a calibrated success tuning guide dvd for sale.

[Nimrod_R]

Thats a good dvd, I enjoyed it alot. I had thought about saying the same thing but figured this wasnt the place to do it. I guess I was wrong.

[Johnwins]

I want HP tuners : (