jbrx7tt

I bought my PFC (new) about a month ago but have not installed as of yet due to mixed responses and I am awaiting an upcoming tune here in CO to install if I decide to do so. I am still not sure if I am going in the right direction but was hoping to get some opinions based on my particular situation since everyone has different goals.

1) I have had RX-7's for 10 years, I am not a mechanic but do dabble & understand how to take care of it. I have 58k miles, have had for 6 years, got it with 23k - Have babied it.

2) My primary goal is a quick, reliable, fun car - I am not into racing or pushing my car to the limits every time I use it, but obviously have fun with the power. I do however want a bit more power which is why I upgraded to an Apexi intake & have bought the PFC

3) I have a DP, CAT & Intake - I have heard the 3 mod rule is OK without PFC but have also heard PFC will improve and be more reliable...others have said with 3 mods the PFC is the only way to go. I have also heard of issues and don't have a desire to mess up my engine/motor or AC functions!

Looking for thoughts/experiences, preferably experienced based responses not just an opinion...should I install this or stay with my stock ECU?

Thanks in advance!!

rynberg

The PFC runs the car far better than the stock ecu, once it has learned idle conditions. The only potential problem area is the A/C operation. It would be best to keep the car at 10-11 psi until you can have someone tune the PFC for higher boost levels.

However, you do not need a PFC for the mods you have. As long as your boost remains at 10 psi, the stock ecu is very safe.

twokrx7

iTrader: (1)

Why do folks buy the PFC before having made the decision to install it and without having someone lined up to tune it or at least make a few changes with a Datalogit?

The PFC is awesome even with just a few bolt-ons, really it is a no brainer especially if you already bought it. You can put it in without worry except for idle and A/C. Many have problems with speed 3 on the A/C, mine never worked with the PFC on speed 3 but did fine on all others. Idle usually works fine if the idle bleed screw is set right.

You can run it with the stock maps but it will really come to life with nothing more than a simple AFR tune by someone with a wideband and a Datalogit. Timing changes help too but most novices are afraid to touch timing. If nothing else is done at least change the fan temps and cold water start settings with a Datalogit. Then with the commander it is easy enough to lean out idle and cruise to improve mileage and do away with O2 feedback.

jbrx7tt

[QUOTE=twokrx7]Why do folks buy the PFC before having made the decision to install it and without having someone lined up to tune it or at least make a few changes with a Datalogit? QUOTE]

As I mentioned above in my post I did buy it in line with a tuner coming to CO, which is in April sometime and was part of my decision making process. I am not new to RX-7's and know the horror stories of people who have done mods without taking into consideration the whole picture. In both cases I have never had to replace a motor or an engine in my RX-7's and don't want to create a reason to do so.

At the time I did have the intention of installing it, and still may, however subsequently read other posts that made me take a second look at it. So before proceeding just understanding what the ideal/safest direction might be to go. I simply want to ensure I am making the best decision, if I sell it and loose 15% but avoid other issues then I think the exercise is worth it.

jbrx7tt

Thanks Ryan that is really helpful and appreciate the info on both possible directions.

drivelikejehu

my question is very similar to yours, about getting the PFC or not.

i havent installed my intake or DP yet but i plan to soon. i DONT want to go above 10 psiat all, but will the stock ecu hold it at 10 psi even in colder weather(i read this can effect things)? do i need a PFC or will something else work better if all i want is to cap it off at 10 psi?

i want to be totally safe before doing this.

twokrx7

iTrader: (1)

I did not mean to come off like an a-hole, just trying to understand why you were now backing away from the PFC after having purchased it with this master plan in mind. Be confident and put that PFC in the car, it will not dissapoint you. If you get it setup by someone that knows the PFC you will be very impressed with the driveability and power gains.

jbrx7tt

Thanks no I did not think you were an a-hole just wasn't sure you read my post fully. I do want the power gains and at the same time ensure reliability, or at least ensure that I don't do anything that will reduce the life of my engine or other. Especially if I am spending $1000-$1500 to go in the wrong direction, I can put a french doors on my pool room and build a nice ground level deck on my house with that money! But it seems like the correct choice based on the feedback I got, especially with the tuner coming into town next month.

Do you think it just makes sense to wait until the tuner session to install it or just go ahead and install now?

twokrx7

iTrader: (1)

Install it now and get the idle straightened out so your tuner is not forced to mess with a car than cannot idle smooth. Tell your tuner to change the fan temps, lean out idle, lean out cruise and turn O2 feedback off, and tune the map from 8psi to whatever you plan to run, then make everything above that rich and safe without the need for fuel cut, set fuel cut at 16 or 17 psi so it's within the range of the MAP but not likely to ever happen. There are so many other little things to tweak, just pick your tuner well and all should be good. You should be thoroughly impressed with a tune.

jbrx7tt

Gotcha, thanks for the info. I am not sure who the tuner is going to be but a bunch of us here in CO are going to have a group tune, it said Steve Kan or someone else is going to fly in, still awaiting the date....I think it is like $300-$400 which for that, I think he has got some good experience & results.

https://www.rx7club.com/showthread.p...4&page=1&pp=15