Join Date: Mar 2010
Location: Pittsburgh, Pistolvania
Chip == Module. Synonyms for the same thing. The junk shit on ebay is a resistor/TPS enhancer.
JET is a piggy back system. A Piggy back system functions by decieving the PCM into thinking the parameters from its sensors are different than it actually is. Generally they force the car into thinking that intake temps and airflow are different than they actually are. When the PCM sees the false inputs from the JET "module", it dials the AFR to match what it thinks is going on. The problem with this is that it causes the AFR to go to hell and will cause the car to run either insanely rich or retardedly lean depending on the actual conditions. The Jet Module would make your car run anything but a Stoichiometric mix. If your car decides to run too rich, you'll burn up your O2 sensors and Cat. Too lean, and well... prepare to see a melted piston.
Trifecta and other PCM tunes (HP Tuners...etc) are the correct and proper methods of doing things. What a tune does is actually change the fuel tables and timing maps inside the PCM itself. That way, the PCM is actually getting the real information it needs from the sensors and then doing what the new fuel tables and timing maps tell it to do for the inputs it gets from its sensors. Also, a good tuner can take data logs and tune specificially for your vehicle and your modifications list.
For the money, Trifecta is the best value. it is only $250 and Vince personally will work with you to optimize the tune. Is it really worth the 20-30 bucks you'll save by half assing it and using a piggy back chip?
GM Stage II | 2nd Gen Projectors | 5000K Low Beams | 3000K HID Fogs | LED Tails| SS/TC Seats
▲RIP 2007 G5: Totalled 1/26/10▲
Last edited by Nighthawk243; 06-11-2010 at 04:26 PM.