jef57

hello,

I' ve just bought hks pfc f con fuel management for fd3S 93'

the hks pfc f con could be adjust : 0 (no modification ) to 9 ( very rich)

what setting should i done to install properly

here are my modification mods :

efini y pipe
new air duct from 99' FD3S with K&N filter in stock air box
mazdaspeed smic intercooler
hks twin power
hks down pipe
blitz nur spec catback

thanks for your help

sincerely
Schaaff

Veger

when i was running the F-con i had the same mods without the twinpower and i had a cat bypass pipe (no cat), had the f-con on setting 2 and that was rich for my mods.

AFR's were 11 at idle and boost was 10.5 so the f-con is a very rich piggy back.
I think you should think about getting a wideband to stay safe.

IMO setting 2 should be ok for you mods if not a little rich.

vtakk eg

which one did you get ? the V model or the new si? ow what?

Veger

Just the older HKS F-con as it was labled, The V and SI are both newer models, as you did not state this in your post i presumed you were just refering to the original HKS F-con as stated in your title.

Veger

Sorry ignore me i thought the 1st post and 3rd post were from the sme person...
2 much beer i suppose.

jef57

it's the HKS PFC F-CON (Programmed Fuel Computer)

The current ROM is for the OEM twin turbine setup (E1107).

so go to setting "2" would be ok with my mod and this pfc f con?

jef57

BUMp...

jef57

I' going to buy an apexi turbo timer to verify afr after adding some fuel through my hks pfc f con

what is th best afr value for fd3s? not too lean , not too rich

THANKS

rynberg

You will not get an accurate reading from the turbo timer....or any other narrowband o2 sensor. You need a wideband o2 sensor to get accurate AFRs...either install one or use on at a dyno shop.

There is no reason whatsoever to install that F-con on your car. The stock ecu is PLENTY rich to run those mods. Just restrict boost to 10 psi (which you have to do with the F-con also). If you really want an upgrade in performance/tunability, sell the F-con and get an Apexi PFC.

Montego

iTrader: (1)

bro mod this car right other wise it is going to blow up on you

turbo timers are worthless. Unless you are always in hurry never let your turbos cool down before a shut down. Meaning that you are always on the gas even 50 feet from your destination.

This is what Apex'i has to say about the A/F feature:

"the Timer can also display theoretical air fuel ratio. Since the Auto Timer uses the factory O2 sensor which is primarily designed for emissions, the readings may not be as accurate as racing air/fuel ratio monitors"

I had an HKS F-con. I dumped that in about six months and went back to using a stock ECU at 10 psi. The F_CON made the car run rich and thus I became a prime canditate for engine failure due to carbon build up.

You can actually run the stock ECU with quite a few mods and be fine as long as you stay at 10 psi. and I mean 10 psi no higher! no creep , no spikes, nothing... 10 psi max.

Edit- rynberg beat me to it

Veger

Im no exspert but i read a lot and if you wade through all the post present and past u will c that rynberg and motego are speaking the truth, make sure you follow the guidance of the vets here as they know what they are talking about.

Dont mak that FD of yours follow the blown path of countless others.


Most of that didnt make sence. oh well u know what i mean im sure.

jef57

NOW I 've order an apexi power fc, hope i have made good choice

Montego

iTrader: (1)

I replied on your Power FC thread

jef57

Thanks for all !!!