StreetRage

iTrader: (8)

Hi. Hows everyone doing? I have a bunch of questions about this HKS F-Con. No, It's not the V-pro or anything, just about the "old school" HKS PFC F-Con.
I read around about it and seen some good reviews but mostly bad reviews. I understand that its just a piggyback and shouldnt be used when doing big mods like single turbo or boosting more PSI and stuff in which case you need a standalone. But I don't have the money for a standalone and im not doing any super big mods right now anyways.....
So basically:
What exactly does the F-Con do?
Does it need to be tuned?
How is it tuned? is there a controller on the thing or anything or do you need to take it to a shop somewhere to tune it?
The tune that it comes with, will that add enough fuel to keep me from running lean?
How does it connect?

For now I want to start off with minor mods such as intakes, downpipe, midpipe, exhaust, intercooler, ic piping, and stuff like that. If I use those mods with the stock ECU i will be running lean right? That is why i figured that i needed a Fuel computer like the F-Con which is cheap and will get the job done. Am I right? any help will be appreciated.
Thanks.

brent clement

Here's a link to a manual. I never found them anygood though. Problem is they most likely work well if the map loaded is properly setup for your engine setup, but there's no way to know what map is in there short of sending the unit back to the manufacturer.
http://www.fd3s.net/fcon_install.html

If you do a search you should be able to find the 3mod rule. It doesn't take much mods to make an fd run lean.
Brent

StreetRage

iTrader: (8)

yeah... thats what i heard too... that it doesnt take much mods to run lean. and if ur running lean, ur screwed.... Thats why im thinking of F-con.....
Or are there some better piggybacks that I can use to mess with the A/F ratio to keep me from running lean?

silverflash2

iTrader: (2)

FCON is fine for those mods. You unscrew the lid on the computer and there's a dial, you can turn it to lean it out or richen it up. the dial goes 1-9. I had mine set at 3. And was plenty. I also had the FCD, with it. There's a chip inside it. It has a white sticker on it and some # and letters hand written. Just call up HKS tech support. and tell them what chip you have, and will it support those mods. If it's not the right one, it's like $50 for a new chip.

StreetRage

iTrader: (8)

What if I don't have that FCD?
What is a FCD?....
but what does it matter what chip you have? if there is that dial that makes it run richer or leaner, then what does it matter what chip you have? It's not a ECU that needs to be specifically tuned for each mod, right?

RotaryEvolution

iTrader: (30)

save your money and put it towards a power FC, seriously.. the F-cons were only meant for a few hp gains and were old school even in the 90's.

silverflash2

iTrader: (2)

FCD.... Fuel cut defencer.. Probably not needed, but helped with the high rpm shifts. I bought my FCON used. It had a chip that ran extra injectors from the previous 7. Not sure what else, other chips can do. I had a chip for everything you are gonna be running, work great. I started with 4,then turned the dial drive hard, it would start to sputter alittle, then i back down the dial and it was perfect. It was still rich, checked the AFR later and it was good. Ran 3 years like that, until somebody drove my car with a low tank of gas and did a sharp accelerating right hand U turn and it leaned out and blew the motor.

StreetRage

iTrader: (8)

****! Thats the worst!! When its not even you that blew the motor but like a friend or someone.... Sucks bro! Is it bad to drive with a low tank of gas or something??
But watever. I guess i will just buy the F-Con. Wont hurt. Its hella cheap right now. And i already have those mods on my car and i dont want to run lean....

fd3rew

iTrader: (1)

yeah...the hks system is a bit of old school but then again, it was probably the only thing that was available when the fd first came out. If your mind is set on the fcon due to either personal preferrence or budget, like what someone had posted, try to find out what the chip inside the unit will support. If it is close to what you need, try to find a gcc unit for it. The gcc will piggy back onto your main fcon piggyback harness and allows you to make basic 2 dimensional fuel adjustment based on rpm (when I say basic, the adjustment that is made is only for leaning out or richening the fuel based on rpm and nothing else, no adjustment based on loading and no timing adjustments, but it is better than nothing) There are 6 rpm settings where you can adjust fuel by anywhere from -12 percent to +16 percent (I'm not sure if there were more than one type of gcc from hks but at least the one I have sitting on my shelf had those adjustments ranges). So if have your mind dead set on getting an HKS unit, look into the gcc unit for basic fuel adjustments.

Speedworks

RE-Amemiya run a HKS F-CON on their drift car (it's got a TD06 25G single tubo on it with bolt ons...)

seems like the little box can handle it...

Though it only let's you adjust fuel and only HKS dealers are allowed to run their software on it...

StreetRage

iTrader: (8)

Thanks for explaining all that FD3rew. But yeah... if I have to get the GCC also, it doesnt look like such a good deal anymore. those cost as much as the F-con itself.... Might as well save up a little more for a PFC then.....

So what do you guys suggest? I have a downpipe and exhaust on my car. I also have intakes, IC, IC piping, greddy elbow, and a midpipe which i was about to put in....
Should I not put those on yet and wait and get a PFC?