WOW I would love to answer that question. I dont want to start mud slinging contest. I can tune the XFI but dont know the little tricks in the software for ironing out driving issues so it takes me longer to work out bugs but I can handle it. The Accel and Electro I know inside out and know all the little tricks. Motec not too bad either. The BS3 IMO is warmed over Fast Classic with old out dated software. Tech help if you are in a pinch is non existent and if you do even get the arrogant return phone call you will be treated as if you are an idiot. Warranty forget it. I can go on and on as to other issues with the unit but I have posted enough to bring out the BS3 guys to blast me as it is. All the systems work. They all have good and bad. Do your home work if you are buying make an informed decision and disregard info from those who have not used a system they say is inferior. Helping a buddy once does not qualify IMO someone to really have a honest evaluation of a system. Yet some will run their wiener cleaner as if they know all there is to know. Talk to people who own and use the systems you are looking buy. Example: Ask Jason White how well he was treated with tech when he owned a BS3. Beware of salesman who do not sell other systems and can not give you an objective opinion as to pos/neg of each. Those guys do what is called SWUG. (Sell What You Got) Last but not least dont take info posted in a thread like this one and run out and spend your money. Everyone will be throwing darts for their favorite.
Now that's an intelligent response if I ever heard one. Good advice 4sure.
I think it all comes down to do you want to learn to tune ur stand alone or do you just want to leave it up to those who are talented with that particular stand alone unit.
I personally would choose an XFI. Not because I can tune it but because I have friends who can. If I didnt id be going a different route for sure. But I don't think there is any doubt that the FAST/XFI is the system used in probably 90% of the fastest cars in all buick classes and also used primarily on high dollar street car builds. Those numbers don't lie.
Just like Razors kit is in the same class with these fast cars. Im sure they all have their pros and cons but those cons are only directed at someone who is not an expert in tuning that particular unit.
The tune seems to be the most critical element in what makes a car go fast vs a car that makes you sh!t ur pants and still drives calmly while cruising.
I would never dream of taking my 2004r to a local tranny shop who says he has a lot of experience with building 2004r trannies if he wasnt a house hold name. I personally would send it to Lonnie. Why? Because I never here anything but positive things about his trannies. It was one of the reasons I bought my last car cause I knew it had a bullet proof tranny. Im sure their are other who are just about as talented as well like PTS or CK. But you can only choose one. When was the last time someone read a negative post about his trannies being weak? Probably never.
How many of the top racers build their own engines? Not many. Most go to an expert engine builder DLS, RPE, ANDERSON, WEEBER, etc. The tune is just as important as the motor so I can't understand why someone would spend $10k on a motor and then screw around learning how to tune their car. Hire an expert just as one would for a tranny, motor, etc...
I don't think just anyone can learn to get the most out of an XFI, MOTEC, BS3, or Whatever... by trial and error. I think there is a true talent and god given skill to tune an XFI, ect... Not just anyone can build a tranny or motor or piece together a converter like PTC right now. Who isn't buying a PTC converter right now when looking for a new converter? So why is that any different with tuning.
The point is when a product is proven over and over again to help the fastest cars win races over and over year after year you would have to think that maybe they are superior. Maybe they are not.
IMO it all comes down to the numbers. They dont lie when it comes to Buicks. It's XFI for the TR. For Mustangs it seems to be BS3. And if you have money to burn then you get a Motec but then u still need someone to tune that.