NoPistons -Mazda Rx7 & Rx8 Rotary Forum

OK, heres the exact quote of the guy that was selling it.

JDM RX7 LATE 2GEN FCON & GCC & FEED ROM RX-7

Japanese Domestic Market Parts direct from Japan.

For the late model 2nd Generation RX7. The is the HKS F-CON fuel computer with the optional GCC

and vehicle specific harness. The ROM installed has been written by FEED, a highly respected race

tuning shop here in Japan. Comes with the injectors that the ROM was set up for. They look stock

to me but then I'm no expert. Includes a fuel cut defencer. The F-CON is installed by plugging in

the harness, mounting and plugging the pressure sensor (about the only part that I don't have) and

plugging in the FCD. The ROM is preprogrammed but there is a built-in adjustability switch accessible

from within the F-CON to compensate for alterations to the HKS staged upgrades. Extra tuning for

the F-CON is done with the Graphic Control Computer (GCC). The GCC plugs into FCON harness and lets

you adjust the fuel pulse duration at specific rpm intervals and/or boost levels. At each of the five

intervals, the GCC can richen or lean-out the programmed fuel curve. The GCC will interpolate or

average between points of adjustment to ensure a smooth fuel delivery. This is a very cool setup.

I thought about splitting it up and listing the parts separately but I just couldn't do it. If you

wanted to replace this heres an idea of cost. The F-CON unit is $990, ROM by FEED is $300 , the GCC

cost $500+, FCD $60, Used Injectors $60. The only part that is missing is the pressure sensor.

You'll need to get the directly from HKS.