Anybody ever run AEM FIC 8 with stock EEC?
Most of us know about the popular standalone systems available (which I'm in favor of), popular chip-based tuning platforms, and the stock EEC tuners, but does anybody know about the regular piggyback systems that are so popular in other areas of the industry (import for example)? AEM FIC, Greddy Emanage, etc.?
The AEM FIC is/was a pretty popular piggyback option for a lot of import guys who wanted to retain stock ECU with OBDI or OBDII function but just modify fueling and timing on top of the stock maps for mildly modified engines or boosted stock engines. I've seen the AEM FIC-8 systems going for anywhere from $150-300 new and used and I can't exactly figure out why this wasn't a more popular option for the Fox and SN95 guys.
Looks like you'd just keep MAF in place and clamp the maf voltage and o2 output at the peak N/A loading conditions, then use the piggyback's MAP sensor to control fueling and ignition when boost comes in. the piggyback outputs stock-like data to the ECU so the ECU thinks all is good, as if it doesn't have boost running through it, and the piggyback takes care of all the boost conditions. the system is easy to install, set up, and tune. It's known to keep all the stock idle and warmup characteristics too, which is something that is typically hard for us standalone guys to reproduce.
What gives? Anybody with real experience here?