I am almost coming close to purchasing a Power FC with commander. My mods are exhuast and dp, will this purchase be a un-wise one considering my minimal mods. Will there be any way to gain performance when installing this with no upgraded intercooler or fuel pump. I was wondering if I could tune it with a boost controller and stock IC to maybe 12psi. And run a straight pipe (HKS hiper muffler). Oviously in the future I will purchase a intercooler, intake, and fuel pump but for now will I be able to gain any perfomance with the FC, DP, and exhuast?

 

you will probably gain a little, but I would also invest in an intake. to my knowledge you can run 12psi and a midpipe as long as you have the correct ECU modifications for fuel... which a pfc would cover, but I would upgrade that IC also if your planning on doing that. Correct me if I am wrong.

Bart

 

you will probably notice a little gain from the base maps that the PFC has pre-programed into it. They come pre-programmed two ways 1)base map = cold air intake, and downpipe and 2) base mod = cold-air intake, intercooler, downpipe, high flow cat, and catback exhaust. I dont think you can pick and choose though.

I installed my pfc and commander last week and compared the maps at http://opus.bloomcounty.org/~patrick/pfc/ to figure out which one i had.

 

Having a downpipe and catback exhaust does not require an aftermarket computer. Even with adding an intercooler, if you have a boost gauge and you can moniter boost creep/spike, the stock ecu may still be adequite. Though wanting to raise stock psi by 2 will NOT suit the stock ecu. This is where you will need the PFC. The PFC has 2 boost settings that are optional to your choice when installed. You can program is using a commander. The PFC comes with a base mod package programmed to suit 12 psi of boost, intercooler, intake, downpipe and catback.

Even if you just have a downpipe and exhaust. Installing the PFC will enhance performance as well as smoothen the overall operation of the car due to its more detailed "cells". So yes you will feel a difference if you buy a PFC and put it on. No, you don't need it for your future mods. Yes, you will need it if you're wanting 12 psi of boost.

Jeremy

 

Ding, ding, ding, we have a winner!

You can run most of the bolt-ons (intake, DP, exhaust, IC) with the stock ECU *provided* you stay @ 10 PSI and go no higher. Anything above that and an aftermarket EMS is a must. As mentioned, watch your boost gauge and when you start spiking over 10 PSI, get a boost controller to keep things in check, or spring for a PowerFC or equivalent, and invest in some good dyno tuning.

 

Hey RX7SIGN, did you fully solve your secondary boost problem from a few months ago?
If so, what was the solution? Or did you go non-seq?

 

If you want a PFC I am selling mine. I have the unit and commander as well as 1300 secondaries for sale. I am returning my car to near stock level and no longer need it. It will however need to be re-tuned for your car. PM me if interisted. Mike

 

Okay, Thanks for the advice guys. I think im gonna go with my original route, IC, intake, blow off valve, etc,. Then after that raise boost, FC, and fuel pump. Oh and I did fix my boost awhile back guess you didnt catch the thread so I will give you the good news. It was a corroted coil in the ignition that was causing the boost to fall off. Also one bad check valve if I remember correctly. Car is running beautifully, and in return Ray of PF who fixed the almost year long unsolved mystery in 2 days notified me that I had a new motor replaced by Mazda recently that I was never told about before buying the car (which I probably know why but dont want to get in depth). He knows this for a fact and guesses it was done around 60,000 or so. Meaning I have roughly 12,000-14,000 miles on it. Now its just basic maintainence taking care of her, and driving her hard I heard she likes it like that. ; )

 

You could for a bit then you risk blowing your motor, The best way I know of for running mid pipe is 1000cc or better injectors, fuel pump, ecu, and ported wastegate for the boost creep/spike. better to be safe then sorry and porting the wastegate is the best way to get rid of boost spikes and creeps which will happen with MP.

 

If I were you, I'd hold off on the intake. With a DP, exhaust, and IC, you should be fine on the stock ECU. The addition of an intake will usually cause boost spiking. Do you have a boost gauge, yet?

 

Yes I do I dont see whats the problem with a intake?

 

I just tunned my PFC for 13-14 psi boost. My mod is CB, DP, Efini Y-Pipe, Blitz SMIC, HKS TwinPower and High Flow Fuel Pump. My best run turns out 275rwhp at 14psi. I kept my stock air box because I am afraid of getting boost spike since I want to use PFC to control boost.

275rwhp does feel a huge different and my torque curver is very flat from 3000 rpm all the way to redline.

BC