Duffee DOES use SCT, but they are not an SCT dealer. They are a diablo dealer. You will need to have the SCT pro racer package and bring in the software. Jeremy has tuned my 99 twin turbo Cobra using the PRP SCT software just recently and it's been great. All of their WOT tuning is done on the street with an FJO wideband, which I think is very important. Most dyno's don't "load" forced induction cars, especially turbo cars correctly. I've personally had my car tuned on a dynojet with conservative A/F, only to have the A/F go lean on the way home from the dyno on the street.
Bottom line is they are honest and won't let it leave until it's done right. By all means, stay AWAY from AMP.
Bottom line is they are honest and won't let it leave until it's done right. By all means, stay AWAY from AMP.