FiTech EFI-4 600 HP Reviews

I have the EFI-600 with FCC on my 408 and have had it for a few years and a couple thousand km. It is a basic set up and matched with a MSD 6AL box and 2 wire distributor. It has worked well but not without some issues which billsdartgt talks about above. I have had no problems (that I know about!) with any of the components installed. Exception is the handheld controller which is glitchy when left out in the sun. I have not hooked up the timing control yet but in the process of doing that.

The instructions are not all they could be and there is a learning curve. It is not plug and play as they say but it is close, at least for simple applications. There are a few simple inputs on the set up they neglect to mention but critical to the install (like PWM setting). Wiring install needs to be clean and there are known issues with interference but easy fix with attention to routing. The FCC does need a vent line back to the tank which somewhat negates the benefit (don't need a fuel return line but do need a vent line!). If you have a dual plane intake, make sure whatever unit you choose will work with that - Fitech says it does.

My FCC is gen 1 and they now have a new one out. There has been much criticism on the gen 1 FCC. Usually related to heat and vaporization in the unit. Some have modified to have a fuel return to the tank from the FCC to keep fuel cool. I insulated mine, insulated fuel lines and installed up at front of car (where battery was, its in trunk). No real issues with heat but I live in Alberta. In line fuel pump is not necessarily fool proof either.

The unit has good datalogging capability and just need to download to a laptop. I have not, nor had to, get into any custom tuning - yet. The car fires up immediately with good driveability and reliability.