The MEFI 4B ECU is a proven stand alone engine controller from Delphi Electronics. It is ideal for marine, offroad, and street rod use. It can control traditional small block, LSX and big block chevy engines utilizing a HEI Distributor and also works with the latest Gen III engines such as the LS1, LS2, LS3, LS7 and some of the 8.1L big blocks all which utilize individual coil pack ignition systems. AS&M also can supply complete wiring harnesses for any of the above mentioned systems.
This ECU has spark and fuel boost tables up to 15 PSI boost pressures