Well, i have been reading this forum for a while now and i the more i read, the more i realize i dont know. I have intake and exhaust now and i am saving for a power FC. All I really want on my car is full exhaust(MP, DP, CB) and to run maybe 12PSI and then ill use money for suspension/ looks. I know i am going to need a get the ECU, but im not sure what else i will need. I hear about so many different things like boost controllers, ported wastgate, restrictor pills, injectors, intercoolers, ect... but im really not sure what i will need to get. MY question is... What else will i need to get besides the ECU so i can run a midpipe safely??? Thnks for your help.

 

ECU, and boost controller.

 

Probably a ported wastegate as well as a boast gauge to make sure you stay under 12psi.

 

The problem is that it seems there is no rhyme or reason about boost creep. Some cars experience it, some don't.

The main thing is if you increase your boost, you need to increase your fuel. So if you plan on running higher boost levels with your setup, you need to look into an ECU upgrade.

As far as boost control, it would be a good idea. If you aren't going to upgrade your ECU then you'll definitely need something to keep your boost down around stock levels.

Whether or not you need to port the wastegate or add some restriction to the exhaust (restrictor plates) with the midpipe will have to be a "trial and error" process. Just be careful when testing.

 

well i already have a boost gauge, and i do plan on getting the power FC, mainly bc it seems to have further expansion possibilities. And i also plan on running like 12 psi because i hear that is safe for stick intercoolers and injecters. Will i need a boost controller in addition to the ECU? or will that control it enough? I dont really want to run restrictor plates bc that seems to take away the point of a midpipe to me. I kinda want to know exactly what needs to be done, is this not possible?

 

You should be able to control your boost with the PFC.

As far as the restrictor plates on the exhaust, if you experience boost creep with the midpipe then all you can do is port the wastegate if you don't want to use the restriction plates.

Nobody can tell you that you obsolutely need to have the wastegate ported or not. I suppose it won't really do much harm if you just do it anyway. Just keep in mind there are people here that still have uncontrollable boost creep even with their wastegates ported.

 

If you get the Power FC techinically you don't need a boost controller, because it has the Apex'i AVC-R built-in. But a lot of people have said that the PFC has trouble controlling boost, so they use something more simple like the Greddy Profec-b, which is what I bought.


I would say get a boost controller in addition to the PFC, cus $300 for that is less then $4500 for a new engine. Just think of it as extra insurance. If you don't get it, you're taking a gamble because other people's PFC's have failed where the profec-b has not.

 

hmm... well what do you think about just getting the PFC and midpipe and seeing if i get creep? would my engine explode before i would know? when you get a PFC, do you need to get it tuned to run a midpipe?
thanks

 

very wrong. the power fc uses the stock solenoids to control boost you can get the power fc boost control kit that uses the avc-r solenoid to control boost. . . or you can buy an avc-r solenoid by itself and control it. the boost control kit has a 3bar map sensor included in the package. most people run the profec b in conjunction with the power fc. . . very good combo. you can set the power fc's boost setting higher than the profec b's setting in order to stay away from fuel cut. i think that is a very nice way to do it myself.

paul

 

Well said, Paul.

NoFriends26:

You may be able to keep the stock fuel pump and injectors for 12 psi, but the stock intercooler has got to go. Seriously. It is inadequate for the stock 10 psi, let alone 12 psi.

 

Keep an close eye on your boost gauge for creep and let off if you see it surpass 12, and yes, get that **** tuned.

Just get the wastegate ported. A little bit of cash will save you a lot later.

And Tyler is right. An IC costs some serious bones, but the stocker is a piece-o-poop .

 

If you were to get an intercooler, you'll be making higher-quality 12 psi....

 

Must add fuel. Running more boost and running a midpipe requires more fuel. I advocate running an upgraded fuel pump before you start messing with bigger boost and less restricted exhaust flow.

As far as boost creep, I run a PowerFC with a resonated midpipe and I have no boost creep issues. I am more careful in colder weather, but so far so good.

 

I have both PFC and Avc-r.. and I think PFC controlls better than avc-r.. also, when you do get avc-r, make sure to use nice tubings for it.. Mine melted and caused horrible boost spikes.. I hit 21psi.. luckily for very short period and seems to be fine.. but it did pull fairly hard..

 

https://www.rx7club.com/forum/showth...hreadid=192249

i just installed this over the weekend, and it works great. I've read many threads that advise a separate controller in addition to the PFC, so I figure this way I can keep my car safe with my current mods (intake, dp, cb spiking to 12 or 14) by keeping the stock boost levels.

Also, a controller would be using brand new solenoids to control your wastegate actuator....not your old refried solenoid under the UIM.

something to consider....

 

thanks for the input guys.
Ive pretty much decided that i mught as well do everything i can with the stock turbos and engine eventually and aim for maybe 325 to 350 hp to the wheels. I think ill jsut start witht he ECU and work from there. Hopefully get eveything done by the end of summer.

 

I was where you are at about 3 years ago. Fiirst of all your likely to get a boost spike at transition between the 1st and 2nd turbo with a Midpipe. I did and most also do. The Ported Wategate will help but doesnt cure it all. There are a few ways to keep things from blowing up. First of all Boost creep doesnt matter as long as your car is tuned for it, has enough fuel for it and cooling capacity enough for the boost your running. i.e. upgrading the intercooler. A bigger intercooler in itself helps to counter act boost spikes as its alot more volume to fill and the increased boost just will pressurize it faster rather than just having the common pressure drop while the wastegate gets caught up on dumping boost. ( At least in my experience) Like Mahjik said its different for everyone. First of all if the timing and fuel is tuned properly for your boost creep it wont matter as long as your intercooler has enough cooling capacity. The stock fuel system can support the boost your wanting to run. If you experience creep you need to analyze the duty cycle on the injectors making sure you dont run past 85-90% max. You dont want to run out of fuel or the motor will be junk. Also Manual boost controllers are cheap and help to counter act boost creep as there is no lag like Electronic controllers. There are ways to keep your boost levels from going too high. Pop-off valves, porting wastegates, manual boost controllers, Restrictor pills etc. Just remember, once you start down this road your constantly trying to play counter act the new problem. You will constanly be reaching limits of each stock part and will have to upgrade other items to fix problems you create from modding only one part of the car. Good Luck.