I'm looking for a company that does good work tuning the computers. I want to firm up the shifts, remove the speed limiter, them to remap the fuel curve, so on and so forth. I contacted one place and guess it wasn't important enough for them to respond to. Just wanted to know where you guys have shipped yours and what options you chose?
Thanks

 

Those are things you could do yourself with hpt. If you're not interested in learning tuning software or spending the money on hpt go with trifecta. Either way your not sending your ecm anywhere.

 

I'm also looking at ways to power tune my ecm. Iv'e looked at the power programmers that are available, but they seem pretty expensive yet. Excuse me for asking, but what is "htp"? and who is "trifecta"? I could use all the help I can get. Iv'e been building v8 powered hot rod for years, and just recently bought this 2010 2.4 HHR as a "run around" rig, but I have to say, I really like this torquey little beast. I would be very interested in knowing how to squeeze some power out of the comp. Thanks

 

Trifecta tune does all that

 

Here's a little info:

https://www.chevyhhr.net/forums/2-4l-performance-tech-14/product-review-trifecta-tune-26691/

Best-O-Luck ,