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Originally Posted by matty-matt
talked with Rhonda and Florian (i think) at FVD and Alice at Softronic yesterday finding out details on the two systems. still undecided on which way to go but will likely make a decision by the end of the week and offer one for sale.
both companies have been VERY helpful and friendly and genuinely concerned with assisting me even though they got my money a year and a half or more ago. that is so nice!
looks like the main difference is that the FVD requires all 4 oxygen sensors to be in the exhaust gas stream and the Softronic just requires 2 of them n the flow and 2 of them hooked up and functioning. does this sound accurate?
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The number of sensors shouldn't be a concern if you are going to stay with the oem header/pre-cat set-up . With that said, back when I researched ecu programs, the main difference that I found between FVD and Softronic, is that FVD creates a software file that's specific to your vehicle's needs . Versus Softronic who more or less offered one generic program for the 986. While Softronic's approach may have since changed, that's how I remember it as being . Keep in mind, that there's almost a "black art" to ecu programming, wherein an experienced tech will know how to take into consideration the "mods" that you have performed to your vehicle, and safely alter the "tables" in order to extract maximum power and efficiency .