Can someone please help me understand this better, I've been searching for a while now and can't find a straight answer.

I am going to run full-non seq. Rats nest and solenoids are gone. If I understand the PFC correctly, it controls boost electronically through solenoids, but if the solenoids are gone, how would it go about controling boost? Do I need to buy a manual boost controller or is there a way to make the PFC control my boost?

Thanks in advance.

 

Hey another hawaii memeber... Set the PFC to non sequential. If you want to run higher than 7 lbs of boost you are going to need some kind of boost controller. If you don't mind running 7 lbs then you can just run off the wastegate spring pressure. Kind of a waste though if you don't run at least stock boost pressure.

 

So my best and least inepensive bet is to buy a manual boost controller?

 

yes, pfc can control boost for non-sequential setup. you'll only be using one solenoid and the setup will be the same as hooking it up to a single turbo setup. the adjustment in the commander will only be for primary setting instead of both. you're better off getting a PFC boost kit or independent EBC. but for lower boost, standard PFC does the job just fine

 

So with the PFC could i adjust it to run 10 psi without some other form of boost controller, while being non-seq?

 

Yea, you can use the pfc to control boost but I run a hallman mbc for my non seq setup.

 

"Lower boost" as is 7 PSI or less?

 

if your factory wastegate solenoid is removed you will need the Apexi boost control kit

 

That is the solenoid on the right, attached to the turbo precontrol right? They screw in to the UIM, underneath almost if im corerct. So what your saying is, as long as i have this i will be able to control boost via the PFC?

 

Yeah I think that is what he is saying. I went ahead and bought a $30 manual boost controller.

 

^^

You need to define what you mean by "non sequential." I have been told that it is possible to run non-sequential without any mechanical modification whatsoever by setting the turbo transition rpms in settings 1 of the datalogit to zero. But a lot of people do the "poor man's" or the "rich man's" with different vacuum routing and stuff.

But theoretically you should be able to if you turn off sequential turbo control. How stable the boost will be is anybody's guess, especially if you haven't ported the stock wastegate. But I am optimistic personally. I have had very good luck with the PFC boost control system on a sequential car with ported wastegate. It might vary by .5 psi as ambient temperatures change.

You still have to have the vacuum lines plumbed correctly as well. I wouldn't attempt it unless you are comfortable with self-tuning and you understand all the vacuum routing very well. Most people just want all those solenoids gone however so they don't bother--but there is something be said for being able to adjust your boost with the same Commander that's there already, without additional devices or valves on the car.

 

It wouldn't be any different than when people hook up the wastegate to a true BC and leave the precontrol tied into the PFC, except you would be eliminating the precontrol completely and leave the wastegate hooked to the stock solenoid.

 

You need the APEXi boost control kit as stated above by arghx, it comes with a new solenoid.

I'm full non-sequential and use the GReddy E-01 boost controller instead of using the PFC to control boost, set-up works great no issues.

 

We know the boost control kit will work, but I was actually speculating as to whether you could use the stock boost control solenoid to control non sequential twins.

 

i am also going non-sequential...will the PFC be able to tune to 15lbs or will i need a MBC?

 

It should be able to control 15psi but I'd get a MBC just because it's going to work alot better especially at higher boost levels.

 

Ok thanx