suprfast

okay, i posted this in the ECU forum but it doesnt get as much traffic as here. here it goes:
i am pretty sure that this has been beat to death as i have found a few threads but none that actually answered the question. for my next mod i plan on getting a PFC since my boost is getting out of control. i know that i will be able to boost higher(after fuel upgrades too) and would rather buy a new ECU then a new motor, again. i was browsing the apexi website to find that they claim the PFC has an optional boost controller kit. im sure that this will be extra but will this work in place of a seperate boost controller. i dont want to clutter up my whole dash with gauges. TIA guys
kris
oh yeah, im planning on having ricks rotary do all the computer stuff.

rynberg

I believe the PowerFC can control boost up to 14.7 psi by itself with no add ons. Apexi has discontinued the boost controller add-on anyway. If you really need additional boost control, get an AVC-R.

nocab72

suprfast

The PFC install is a 30minute job. Even for the mechanically illiterate (sp?).

It does a nice job of controlling boost, has both a high and low boost setting which are configurable "tweakable" from the PFC commander.

rynberg is correct that you'll only need the AVC-R if you want to boost over 1bar (14.7psi). With the stock twins you'll be very happy with the PFC boost control as well as all the other features it has!

K

rjuge

I've got the pfc with the optional boost controller and it will control up to at least 2.0 kg/cm2 (i think over 30psi)

but the kit is extra, yes. instead of buying an avc-r, just buy the solenoid and control it all through the pfc. less junk to mount on dash.

Johnny

you dont need the boost controller kit unless you are running over 1bar anyways... The PFC has been doing a nice job for me so far...and yes the AVC-R is another option...as well as Greddy's Profec's and HKS's EVC and Blitz..etc etc

7-sins

The PFC is a great unit. I would recommend it to anyone. With the Datalogit and the AVCR it is tops, user friendly and gets the job done.

Hyperite

To *control* boost up to 1bar, the PFC is fine, BUT you need a new MAP sensor if you want the correct amount of fuel. They sell a 2-bar unit pretty cheap, I hear.
~Tom

jspecracer7

Or you can spend about $150 for a 3-Bar map sensor. That's my next purchase since the stock map sensor is only good to 1.2 kilo's.

The PFC can control boost without the boost control kit IF you have stock twins.

I like the PFC because you can control a lot of the stock options i.e. oil metering

suprfast

coolness, this is what i was hoping to hear. i really dont plan on running more than 14psi anyways. i far from that, but my next mod is the PFC. all i have now is an hks DP drop in K&N and i am spiking bad. does the PFC control spiking???? plus, i know i can use the PFC for everything. even the day i plan to go single where 14psi is NASTY. thanks again for the input guys. i will discuss this more with rick @ ricks rotary. cant wait to be able to go full throttle at night and not worry about spiking. plus with the PFC FLAMES will be shortly. woooooooooohahahahaha

spyfish007

Um well .... the MAP sensor is maxed out at 1.2 bar boost and the PowerFC's map is good to 1.4 bar boost. So really you can run 17 psi boost-depending on how you talk to that is or isn't controllable with the twins. The PowerFC boost control system is really an older version of the AVC-R. Note: you don't need the boost control kit for the twins because the PowerFC has boost control built in because the RX-7 is a factory turbo car.

BrianK

I think suprfast is asking if he can keep boost DOWN with the PFC - not how high he can take it with the PFC... (comments like "boost getting out of control" and "I am spiking bad" are hints).

correct me if I'm wrong.

yy4u

If i have a PFC and i want to run 20 psi, can i JUST add a AVC-R or is a new map sensor necessary as well?

jspecracer7

...you will DEFINITELY need a new map sensor. The stock one is only good to 1.2(EVEN THOUGH it will go to 1.4) 20 psi is appx. 1.4 boost. You'll need BOTH...

spyfish007

Well not necessarily .... If you choose to get the AVC-R it will be able to control boost properly because it can read the boost correctly with its own sensor. The PowerFC will not get any usuable info beyond 1.2 bar so at the P19 (1.2 bar) you will have to tune that for your 1.4 bar of actual boost ... therefore when you run actually run 1.2 bar it will be too rich!

So you have some options ... I think the boost control kit is a good one though, but if you want the AVC-R that could do the trick as well.

suprfast

actually suprfast(hehe, first person) is asking what i can do to keep the boost down. i dont want to spike and boom. i have most of the other mods lined up minus the PFC thus why i am asking questions. this is the only one that i dont feel comfortable with doing. i can do any bolt ons(who cant). i just dont want to go kaboom. ill be adding all the goodies once the PFC is on. can someone get me more info on the optional boost controller that apexi is talking about. is it still available. if not i think since i will be boosting less than 14.7(of course ill max out the PFC if its safe, just wont go more) everyone agrees that it will be good to go. if this is the case(and depending on how much more the optional boost controller is) i will just go with the PFC. like i said though, i dont want a gay *** reprogrammed. my honda had a reprogramed, and it was lame. i like the idea of being able to change everything to properly run with each mod. thanks for all the info guys.
kris

maxcooper

As mentioned in other posts, you'll also need a new MAP sensor so the PFC can read the boost and choose the right fuel map. Or you could program the peak (1.2-ish) map to give enough fuel as spyfish suggested. It should work, but I hate kludges like that.

I've done some PFC FC-datalogging with high boost, and my stock MAP sensor tops out at 1.15 kg/cm^2 (I think that's the units). The boost line goes up to that pressure and flatlines until my boost drops below that level again. I am not sure if it is adjusted for altitude, but part of my datalogging was done on PCH, which is right at the ocean's edge.

Sorry for the off-topic post.

-Max

suprfast

MAXCOOPER, post away. you know you ****. you always help out when its needed. im gonna have to talk with rick at his rotary shop and see what he can do about fixing me up right. also need some dyno time. thanks everyone.
kris