Demon-svt hmm good point. Just gonna have to save my $$$. To get it tuned right. When I make changes to the SAFC it seams to have an effect throughout the RPM range, but I have noticed the changes aren't very accurate. I understand what you are saying but on the other hand it seams to be taking away fuel and adding it when I tell it to. Can you explain why I can tell a difference even when not at WOT? Maybe the V6 computers behave differently then the 4cyl when the maf signal is modified? I apppreciate the explanations. Right now I am running richer then needed to be safe. Its just amazing to me how small changes to the safc setup can effect the performance of the car, I can only imagine what a correct tune would do. I checked the plugs today and no sign of detenation and it has been over 400 miles now in turbo form. Tomorrow I am going to build a ball and spring boost controller like what I had on my neon so I can do more then 4psi, I will try 5 and then maybe 6 and recheck the plugs and keep an eye on how rich the system is and detenation. I can hook my safc to log the knock but I just need to hook the wires up, this might be helpful to avoid engine damage.

ATX MTX swap, rear drum disc swap, drilled rotors, ported intake, optim throttle body, CAI, 7.5L MAF, adj. fuel regulator, longtube headers, underdrive pulley, no EGR, low inpedence bigger injectors, 2002 Focus Swap