I've been reading over at HPTuners forums and around here also. Thinking of buying HPT pro because I feel like i could tune my 09 ss/tc myself and have access to a dyno locally. Is it really as easy as it seems?? Just so I'm clear, it seems like I may need to calibrate my MAF (stock intake), set my lambda and DALs. go for a few pulls while data logging and adjust as necessary. I know there can be more to it, but is that about right?

Thanks in advance.


Just so this is covered, I don't feel like I'd be happy with Trifecta since I'll be adding a mod or two every month for the next 6 months then looking at upgrading the turbo when the ECM becomes more tunable.

 

It is more complicated than just that.

1. Playing with lambda is a bad idea
2. Calibrating the MAF is not as easy as it sounds
3. If you REALLY want to tune you will need a wideband o2 to adjust AFR accurately
4. You really need to read some books and do alot of research before attempting any major tuning. If you want a minor tune you may as well just get the Trifecta instead of paying for HPTuners yourself. If you REALLY want to learn how to tune, then get HPTuners and go to town... but you will need to LEARN ALOT before you can expect to do any major tuning and reap the benefits of your HPTuners.

 

also the lnf does have a built in wideband, from what i have messed around with on a lnf, its alot easier than lsj, but only takes time to learn, go very slow and read a 100 articles before u even attempt anything.... know exactly what you do before you do it

 

PE Lambda is how we adjust our A/F at WOT. The stock tune is commanded at 14.0-13.0 ( 0.95-0.88 lambda) at WOT. The car has a factory wideband FYI.

 

Yes its that easy, i would say its almost idiot proof.
You have only a handful of tables to play with, boost/afr/spark/cam and thats pretty much it, and you don't even have to touch the spark/cam tables unless you want to get every last bit of power out of the lnf. None of the VE bullshit that every other gm ecm has, bosch made tuning this ecm kid friendly.
Also the std version will work just fine, you don't need the pro unless you want the built in logger, though it is handy when you don't have your laptop with you.

 

You don't need pro. Your car has a built in wideband. Pro allows you to monitor an additional wideband which you wont need.

 

1. While "playing" may be a bad choice of words, the Lambda table is how you set the AFR on this PCM, so you'll need to change it at some point. The stock tune is relatively lean in the midrange.

2. calibrating the MAF is as easy as monitoring LTFTs on a stock intake, and calculating % difference in cross sectional area on an aftermarket intake and flashing a % difference, then monitoring LTFTs

3. The car has a factory wideband and monitors it for fueling feeback. Usually what you command is what you get...

4. Learning is always good advice. I learned HPT by taking logs first, before changing anything, and then making a very small change in what I thought was the right direction. Monitor more logs and see if you got what you wanted. Lather, rinse, repeat...

 

I didn't realize that the SS/TC had a wideband from the factory. That makes tunign about 100x easier right there.

 

I've been lurking in the GM I4 tuning forums for a week or two. HPT will be here tomorrow and I'll do what you mentioned. Log, adjust slightly, lather, rinse, and repeat. lol

 

Its quite easy to get some good results without making danger. I tuned the car on my lunch break and it was a nice bump in power. I have since tuned the schmidt out of it being more comfy with HPT and LOVE IT The car is just sick! No trouble breaking the tires loose going from a cruise to WOT!!

 

Sweet. I downloaded the software from the website and my cable should be here tomorrow. Can't wait and that should give me some time to mess with it some before Thursday Test n Tune at the local track.

Will I need to do much retuning for a down pipe when I get it? Ordered the CIA Stainless Hi-flow w/ cutout.

 

do it. lnf are so easy to tune, poorly trained monkeys could do it.

 

I was bored

https://www.cobaltss.net/forums/show...06#post4179806