Silvia Club of NSW

hey all, just a few quickies

im looking at gettin a new ecu, i heard there is an apexi power fc 'pro' which has an ignition cut for the rev limiter and the normal one which doesnt

what is the one that most people have? is it worth going for the 'pro'

Yes I think the Pro version use's ignition cut instead of fuel cut for the rev limiter.

Also, the Pro version allow's you to remove the MAF and use a MAP sensor, I'm unsure of any other difference's though.

If you were going to the point of needing something like a Pro over a normal PFC, then personally I'd recommend a Haltech or Motec anyway.

So, if you're only doing the basic's, or even one or two step's further, than a normal PFC will be fine and dandy.

I think most ECU's use ignition cut instead of fuel cut for the rev limiter. And of cause ignition is beter for your car than fuel cut. Any way should be able to drive with out hitting rev limiter.

_________________
Disclaimer: If you have'nt worked it out by now I CANT SPELL FOR SHIT.

Regular pfc uses fuel cut

Pro uses ignition cut and has lauch control as well apparently. It still uses the maf sensor

D JETRO (i think thats how its spelled) uses map sensor and no afm.

99% of people use a regular pfc. If you can get a pro for the same price then use that as ignition cut is a bit nicer to your engine, otherwise it's not worth worrying about uless you really want launch control.

_________________
meh

so the chances of me finding a 2nd hand 'pro' or d jetro are pretty slim ya recon..

might just have to go for the std one in that case

On a street car a MAP sensor setup would be less than ideal, so youd be arguably better off with a standard or pro anyway.

ok, ive got a power fc, just the std one, bought it 2nd hand, few more questions

can i plug it in and my car will run?
will it be bad for the car?
am i better off to get it put in wen its tuned?
will i be able to replug in the std one and it will run the same without resetting or anything?

If you have an aus delivered s14 then there are a few wiring changes that need to be made.

I'd suggest having it installed just prior to tuning to save hassles, unless you can find out exactly what needs changing and are capable of doing it yourself.

_________________
meh

the previous owner who was using it said he didnt have to change any wires?

So you have an s14 then?

ADM and JDM s14's (and s15's) have slightly different wiring at the ecu.

Specifically, the fuel pump pin-out need's to be moved, and the CAS wiring need's to be moved at the ecu (reversed i think??)

Easiest to get whoever's tuning it to fit it and worry about it.

rito thanks man

the pro version is made by AP engineering for Apexi for models like the supra, gtr, ae86 and rnn14 gtir, this version also has launch control ability
the d-jetro version uses a map sensor as opposed to afm as a map sensor is more "friendly" for big power figures.

as the previous owner of joelmans power fc i can say that there was no wiring changed on the ecu plug and he has the plug to confirm that.
the only wiring that was changed was for the z32 afm, where i used a vl commodore afm plug and removed two redundant wires from the plug.

his power fc is setup for 740cc injectors, z32 afm and has had the map from a drift style 180sx in townsville (far north queensland) pretty much copied into it as the base map has many holes in it. it showed a reading of 4400Mv on the commanders screen which indicates roughly 1 hp per 10Mv of airflow.

hopefully that makes things a little clearer for everyone

Is your S14 a Jap-spec or aus-spec?

Because I've personally installed PFC's on 3 Aus-spec S14's (Serie's 2 model's) and all three needed the fuel pump and CAS wiring changed at the ecu plug.

That being said, Joel - plug the ecu in.

If it start's, you're sweet.

If it doesn't, then the wiring must be modified

There are no JDM S14s in australia. However the motor/ecu combo could be. but unlikely

series one S14's do NOT require wiring modification to run a power fc. mine bolted straight in and started first go...

series 2 S14's and the S15 DO require two pins to be swapped around. from memory it's the fuel pump control relay pins,but don't quote me on that part,as I haven't actually done that myself.


Justin...

_________________
STI - Made in Texas,not Japan.