Quote:
Originally Posted by SSRider
Typically when I say "Tune" that refers to the current programing that is in the PCM (Power Train Control Module) whether it is the stock tune or aftermarket.
There are typically two ways to program a PCM using the aftermarket. The first and best way, in my opinion, is too purchase tuning software and tune it yourself or hire a tuning shop too do it. If you tune it yourself then you will need more equipment to get the job done correctly. Preferably have a good tuning shop do it for you if you have not the desire nor time to put forth to do it yourself. I found the learning curve to be quite steep and you will have to spend about $1,000 or more on additional equipment. The other way would be to buy a "hypertech" product. I have never liked this option. You can get a much more specific tune for a little more money by visiting a reputable tuner in your area. I should also note here that some tuning shops can tune the PCM through the mail but I still prefer having it done in person to address the specific needs of your engine with respect to the mods, altitude you drive in etc...Also, I believe that some GM approved tech shops could tune using a Tech ll but I am not sure of this.
Whoops forgot to mention that the last time I priced a PCM it was $200.
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I should offer some further clarification on the word "tune". Tune relates to the programming of specific engine and/or tranny parameters within the PCM. The most often adjusted parameters are the A/F (air/fuel) and the timing. There are specific tables that a tuning program such as HPtuners or LS1Edit contain that are used as a look up for what the engine needs or is requesting based on other parameters such as the throttle position indicator. Mostly though when you hear somone talking about a tune it usually is as simple the the AF ratio, timing and some tranny adjustments to the TQ (torque management) tables. Does this help?
Also I would like to add that I do not consider a "hypertech" type tune to be a DIY. The reason is that the actual tuning parameters were adjusted by a vendor and saved to a device 'Hypetech" then you simply upload it to your PCM. A DIY tune is one that you create and upload from software such as Hptuners. I have not looked a hypertech in a while so I do suppose they may have the capability to adjust some parameters such as timing, however I still think they are a waste of money. If you don't get the A/F correct your missing the boat on a correct tune. And I KNOW a hypertech can not get the A/F correct because the A/F is measured at WOT using a wide-Band sensor. Find a good tuning shop in your area, if possible, and talk to them.You will learn so much more by seeing it done.