[mstennes]

I have the Holley MPI C950 Pro Wide Band with the throttle body where the carb would be. If I were going to keep it I would go with FAST's controller. IMO the Holley system is a big PITA. Holley's tech support totaly sucks and actually made things worse. On the throttle body where the throttle attachés is a weak spot it needs to be knurled so I have had slippage which has caused allot of tuning woes. It is low end to say the least and to me it only gives bragging rights that you have a EFI, as a well tuned carb works better. We spent allot of hours tuning only to have anew problem pop up. With some tweaking on the actually program I think it could be better in the cell area. I have talked to allot owners with Holley's system who say the same thing who went with FAST's as it was a better thought out system. To bad you don't have a small block as I will be selling this system here in about a month when I tear the car down. I read somewhere that the computer programmer who wrote the system actually wrote Accells first then Holley than FAST's. Accel has tweaked theirs where Holleys is the same, basically as the first ( I started out with the pre pro system). If you really dig deep you find the reason Holley's is the lessor known and used. Doug F is the mod over at Chevy Talk and a R&D engineer at Holley. Hes a good guy and has helped allot I just got to a point where I wanted a control unit that was faster, and able to process more. The other thing I don't like about Holley's system is, it is set up to use floppy's and a serial port. Most all new laptops have neither. It is also a DOS based system which shows its kinda dated. That being said it will work you just need patience and lots of it. Don't even think about using it without the wide band as that really gives it more tuneablity and it doesn't like big cams either that was a big tuning headache. Hope I helped.

I forgot the Holley system does not like low voltage at all, so if you have a big stereo or other high voltage items go with at least 130 amp alternator.