hey guys how much can u get from the Apexi PFC? ya stick with it or switch to haltech or any other stand alone? After making too much hp is better to get haltech or Apexi PFC is fine? What kind of stand alone ya using after braking the 10sec barrier? Im in the learning mode right now guys any input is good.

 

How much power are you talking about? What port and turbo? Fuel? AI? Additional injectors? All will help determine what stand alone you will need.

 

It depends on who your tuner is, and what they are good with. Ensure whoever does your mapping has (successfully) worked on Rotaries before.

Check out this sub-forum: https://www.rx7club.com/forumdisplay.php?f=47

 

I haven't really seen any limits to how much power you can run with the PFC. The only real limitations are it's only 2 rotor and you can only drive 4 injectors, 2 primary 2 secondary. Also, if you want programmable aux injection you'd have to get another computer to control that.

The big pro is it's real easy to use, reasonably priced, and nearly everyone in the FD community uses it. People have made obscene amounts of horsepower with it. If you're looking for 10's that definitely not a problem.

Dale

 

Practically speaking, there's no power limit. There are certain things it can't really do, like 2 step or controlling nitrous/methanol/etc. It doesn't have knock control but few people have functioning knock control working on a modified Rx-7. Its closed loop capability isn't very good either and is usually turned off.

There are things it can do but are quirky to use, like some of the idle control and the boost control capability on a single turbo or non sequential application.

But there are some things it does very well. When set up properly, it stages injectors based on duty cycle like the stock computer. Most other computers do it based on rpm & boost which can require more tuning to get right. It controls the sequential turbos EXACTLY like Mazda does. It has the exact same logic down to the duty cycle curve of the precontrol and wastegate solenoids. I've detailed that extensively in another thread.

 

ty guys for the quick response. Im trying to build my Fd close enough to 450hp range thats why i was asking if people were changing to haltech after 400hp or something because if invest in a stand alone im not planing to switch to another one but if u guys says theres no limitation with apexi PC to get my car to that point ,then apexi is the1. Another question ya stay with maf or change it to map? Thank u guys for the info. I really appreciate it.

Ignacio

 

There are tons of guys over 400whp on pfc, and the fd is map already, people do switch to different map sensors when going over the 17psi limit of the stock one tho.

 

Also it is nice that the pfc uses the stock engine harness so you dont have to build one like other stand alones but many cars that have the original harness are in very poor shape and need to be replaced anyway so its going to be $800+ for a new harness to be able to use the pfc safely with an expensive new build.

 

The 3rd generation Rx-7 does not use a MAF sensor.

 

I am almost 600hp, I have a 2-step system build for the PowerFC, I have a True IGN cut for the Rev limiter ( Fuel Cut is the PowerFC stock form )

You can also run more then 4 injectors you just have to be creative on how you do it, like running 2 Primaries and 4 Secondaries. With the right resistance the PowerFC will not tell the difference, You will have to lie to the PowerFC and tune the fuel according, you can do anything if you design it correctly.

This is all easy systems to build to work with the Power FC.

Just my 411

 

You can stick on a FJO driver and run 4 more injectors.