The HKS one is better by far, Think about it over fuelling can be just as bad as under fuelling. HKS tells the ecu from set go that the boost is a set % lower than it actually is throughout the hole rev/boost range, in theory all you have to do is up the fuel by said %. But the clamp type FCD tells the ecu that the boost is only at a set point no matter what so say it kicks in @ 0.8bar and your running 1.1 bar, your ecu still thinks its running .8 and if your running 2.0bar, your ecu thinks your running 0.8bar. So to get the fuelling right on the JAM you have to up fuel pressure or bigger injectors for 1.1 bar but anything between 1.1 and 0.8bar you will be overfuelling and then anything under 0.8bar will be mega over fuelling, because you've had to set you fuel pressure so high in the first place. Boar wash is just as bad as det. If your going to do it the cheap way use a HKS FCD. or save for proper management. The FTe management overfuels from factory as it is and JAM FCD only make it worse.
I'm I the only one that can see this huge huge, unnessassary fault factor in the clamp type FCD. HKS did it right and using a HKS and FPR is the next best thing as using an emanage/plug and play. The only other factor you then have to worry about is your timing map which no FCD/FPR combo can account for, you have to retard/adavance the timing yourself.
