Faygay79

bone stock fd with dp
about to add a blitz intake and a rb dual tip exhaust
will i need a pfc??

adam c

iTrader: (2)

If you want to boost above 10 psi safely, you will need a PFC or upgraded ECU. If you want to keep the boost at 10, you will need a boost controller with those mods, and won't require a PFC/ECU.

I have the "home depot" boost controler. It works well, is inexpensive, and easy to install.

Adam

r0t0r-rooter

When I had those mods, I was boosting ~10.5 - 11..... it wasn't until I got the hi-flow cat that it would really spike a lot @ transition. I think you'll be fine. It never hurts to get it, since it's something you'll end up with eventually (despite how much it costs to tune/re-tune, you'll still pay it).
You might be able to squeeze an extra few HP out of your car "as-is", so.....

AbadR1

iTrader: (1)

Hmm... I hope you have a boost gauge, and a EGT gauge, just to make sure you know what you are boosting at and also EGT to measure exhaust temps. Oh yeah I think you need to just get a manual boost controller is cheap and works will, but you need two, one for wastegate and the other precontrol. But I would not get some of the generic boost controller, get one from Hallmen or Turbo Xs. I had a bad experience with my R&M manual boost controller that I bought off EBay. The screw and prevention nut came out and my boost spiked to 15 to 16psi. Hallmen boost controller is design where no bolts are used, so no chance of it coming off. Also get the PFC later on if you are going to get a mp, and so forth. That is then when you can dump more fuel with it running at 12psi or maybe 11psi, if your nervous about blowing your turbos at 12psi. If you are looking to upgrade more and more, you will need a PFC pretty soon. Just to dump more fuel, but still need a boost controller to limit your boost, PFC does not do that really well. Good Luck!

DavidDeco

You might as well. It'll be safer, you'll extract more power from your setup if you dyno tune with a wb and eventually you are going to want to boost more if you are asking these types of performance questions so Do it!

Faygay79

looks like ill be getting a profec b while im at it
thanks for the info guys
and i do have a boost gauge, just not a egt
also who in the sf bay area does wb tuning for the pfc?

Little 7

You need a boost gauge even you have boost controller or not. It shows your turbo performance.

If you get PFC, you may buy the PFC boost controller add on kits from Apexi

There are few guys tune the PFC in bay area, search on the forum. I heard GD, Rick's rotary, ATP are best PFC tuning

SVT Squasher

I would recomend it. It dosent hurt to have a PFC and it sounds like there are more mods coming.

Silvia_S13

EGT is really only good after youve dynoed with it to find your baseline EGT temps. it varies from car to car depending on mods, but its a pretty useful tool if just used as a ballpark reference

but if you can afford a pfc, by all means go for it

911GT2

In my opinion, if you need to ask, just get it. Engines are more expensive than PFC's, believe me.

kyle@insight

I assume something like a profec-B would be just as good as a manual boost controller as far as keeping the boost down right? How easy is it to use the profec-B? Is it just wire it up, hit the button or is there more to it than that?

Silvia_S13

profec be can never lower boost any lower than stock, it will help keep spikes to a minimum though. it is probably the simplest of the electronic boost controllers to wire

kyle@insight

I'm aware of that, I know it depends on the wastegate spring. My question is, after wiring it in, am I home free? Can I go out and give it full throttle to redline and expect no boost spike? Or is there more to it than that.

DeepInTheGame

I have the following mods: apex'i AVC-R boost controller, HKS twin air intake, apex'i BOV, and a midpipe. Is it safe to run 12PSI? I heard not to run over 12 PSI on the factory ECU, not 10 which is what I heard in this forum... I also posted on the different types of ECU's, any input on that thread would be greatly appreciated

rynberg

WRONG!

You can lower the boost to 7 psi easily with the Profec B. Please know the facts before posting, these cars are not Nissans.....

You, sir, are headed for a blown motor. Spend some time reading the forum and the linked sites in the newbie sticky. BTW, why do people always list an aftermarket BOV with their mods -- it has NO effect on anything with the stock turbo system...

Run 10 psi. Do not get anymore mods than you have now unless you get an aftermarket ecu or put a main cat back on.

rynberg

There is no wastegate spring, it's controlled by an actuator (which is equivalant to 7 psi spring).

Yes, you install the Profec and you have control of the boost. Properly tuned (you can do a search under "rynberg" and "profec" for my tuning suggestions), you will not have any spikes or other problems. (You will still get boost creep if you have a midpipe, but that's a function of the wastegate not being big enough and you shouldn't be running the stock ecu with a midpipe anyway.)

s13sr20

What does it matter nissan or mazda...boost controllers only RESTRICT boost pressure, which means boost can only be raised.

Internal or external, doesn't matter....actuators have springs, which are set to a certain psi, and w/o adjusting the actuator rod, you cannot lower boost.

s13sr20

if you say the stock actuator is set to 7psi, then bypass the factory solenoids, that are ecu controlled to regulate boost to 10psi. stock solenoids shouldn't be used with aftermarket boost controlers anyways.

rynberg

WRONG! An electronic boost controller simply allows the user more active control of the wastegate. And that's all.

In the FDs case, the wastegate actuator will want to activate at a 7 psi differential (equivalent to a 7 psi wastegate spring). The stock ecu tries to cycle the wastegate to maintain 10 psi. With an aftermarket controller, the wastegate duty cycle can be increased to achieve lower boost. Anyone with an aftermarket boost controller on an FD can easily prove you wrong, so please stop while you're behind.

Obviously. In fact, when hooked up correctly, there is NO WAY the stock solenoids can control the boost. When did I say anything to the contrary?

s13sr20

you are a moron

What do you think boost controllers do, jump inside the turbo and magically regulate boost? Boost solenoids restrict pressure...that is all they can ever do, I dont care if it's a fricking turbo yugo...it's all the same.

Almost every OEM turbo car has a stock solenoid, which is controlled by the ecu to regulate boost.

Why don't you stop spreading bad information.

Silvia_S13

im not going to get technical on you like s13sr20 did, but as i glance through my HKS EVC manual, it says "the EVC is not capable of reaching boost lower than stock (OEM) levels." boost controllers are not car specific, so that pretty much kills your point.

i hate to troll through old posts but someone with such expertise on the RX-7 should stop with incorrect information

rynberg

I love when two idiots who don't know a thing about FDs insult a veteran member of the forum.

Perhaps I should take a picture of my boost hitting less than the stock 10 psi if I turn my Greddy controller down? Or a picture of it hitting 7 psi when the controller is off? Or should I dig up the HUNDREDS of threads in which people discuss these things?

rynberg

Go ahead, read through the hundreds of old posts. You'll see who the moron is.....

rynberg

A boost solenoid doesn't restrict pressure. The solenoid triggers the wastegate actuator to open the wastegate. The stock ecu has a fixed duty cycle for this to achieve 10 psi. If you install a boost controller, you can cycle the wastegate to achieve 7 psi.

Faygay79

back to my freakin question....
do i need a pfc!!!
ok i see everyone says i might as well get it
now knock off da arguing