I am installing a new motor with the following mods:
-Street port
-Full exhaust, intake, intercooler
-Full non-sequential conversion
-PFC-Tuned with base map for my mods from the rx-7 store.

I followed this vacuum diagram:
Post-> https://www.rx7club.com/showthread.p...m&pagenumber=1

I got rid of all the selenoids, does this mean that the only way I can control boost is with a boost controler? Should I put the Turbo control selenoid back in? If so, where would it go? Will I then be able to control boost with the PFC?

I am planning on having it tuned after it is broken in, I just want to make sure I hook everything up correctly.

I have serached and couldn't find anything to help me.
Any links or suggestions would be helpfull. Thanks in advance.

 

Put PFC in non-sequential mode .... functions menu top selection.

Hook precontrol & wastegate solenoids back up to the UIM. Use the precontrol solenoid (instead of wastegate solenoid) on the wastegate actuator in a similar manner as stock. Use the stock pill in the stock line as well. Any questions?

** Note the solenoid part will be just like what guys with single turbos do. I can never remember which one. If the one I mentioned doesn't work .. use the other.

 

Okay, so all I have to hook up is the turbo precontrol selenoid to the wastegate? What would I hook up the wastegate selenoid to? Do I even need it? If so, is it just so that the PFC doesn't pull a code?

Could I use a needle valve instead of the pill just to get a little more control? I found this diagram, should I hook it up like this and just use the precontrol selenoid?

https://www.rx7club.com/forum/attach...&postid=889938

 

Green line is to nipple #2 on wastegate. That is where the wastegate solenoid connects. You can use either solenoid to control the wastegate actuator. However I believe you need to use the electrical connector from the precontrol solenoid on which ever solenoid you choose to operate the wastegate actuator. The other is connected to nothing.

Finally the wastegate nipple #1 goes to a pill or a neddle valve if you prefer.

 

you're really better off to use the actual apexi boost control kit or another form of boost control. it's a lot less trouble imo

 

Thanks again, I think I have it figured out. Do I need to use that little presure thing that connects the other line to the oil metering lines to the elbow?

 

Why? Any experience, reasoning, hard data to back up your claim. I have read a lot of debate about this, I really don't want to spend the extra 300 bones if I don't have to. I know some people have trouble controling boost, I guess I am going to wait to see.

 

You can route the vacuum lines without the hardlines if that is what you are asking, but you do need to hook that stuff up. When I was non-sequential I did the exact same thing you are doing. It works fine.

 

yeah im going non-seq soon

 

oops double post

 

Does this look correct?

 

You look good.

 

Thanks for all your help spyfish007

 

Does anyone have a picture of how this is supposed to look?

 

^ First of all, do you have access to a Datalogit? It's important for the non sequential boost control to work, as there is a setting in there you will need to adjust. This thread is old and contains... half truths about non sequential boost control with a PFC.

 

Hello, thanks for your reply. Yes I can get access to one.

-Karl.

 

You can use the stock solenoid with a restricter pill or you can switch to a 3 port solenoid like any aftermarket boost controller would have.

with the stock solenoid just hook it up basically like how it works from the factory--line from the turbo with restricter in it goes to one port on the actuator. then the other port on the actuator goes to the bottom port of the wastegate (not precontrol) solenoid. Then you can run a hose from the top port of the wastegate solenoid back to the intake, or vent it to atmosphere. This setup will bleed pressure out of the actuator just like stock. You have to adjust the boost and duty settings a little bit to get it right.

In the Datalogit you actually want to keep the "sequential turbo control" ON. I know that doesn't seem to make sense, but that's what you want to do. Then adjust the turbo transition settings.



Here I have the "high" set to 2000 and "low" set to 1800. Try starting with a high value of 3000 and low value of 2800 for non sequential twins. This sets the rpm at which the wastegate will be allowed to open. Higher values help improve response but if it's too high you may have spiking. Then you progressively increase the boost and duty settings. It sounds complicated but it's really not... just slowly raise the numbers in these columns.

See this thread: https://www.rx7club.com/single-turbo-rx-7s-23/long-term-testing-power-fc-single-turbo-boost-control-900599/


You can also wire up a 3 port solenoid similar to what you find in aftermarket controllers. http://www.frightprops.com/pneumatic...-orifices.html

on an internal wastegate, the middle port would be connected to the pressure source and the port on the left goes to the actuator. One of the ports on the actuator would be capped.

 

Thanks a lot for that mate, your time and knowledge is much appreciated.

-Karl.

 

With non-seq: the precontrol actuator should be removed and the precontrol gate welded open. After all we want both turbos to work together all the time. IT HAS ALLWAYS BEEN THIS WAY!

The PFC will still control boost but set to the non-seq mode. But the PFC sucks at controlling boost under varying weather conditions.