Can the Profec B control my single twins?
Hi guys,

I bought a Profec B boost controller, my car has non-sequential turbos -Pettit hybrid hi flow twins-. I installed the boost controller the last weekend, but it does not controls my wild boost, nothing happend.
I check the connections, the hoses and everything seems to be ok. There is no difference in the boost behavior, turning the unit on or turning it off, or moving the *****, just nothing happend.


I put the hose that was connected from the turbos to the IN on the Greddy solenoid box and the OUT from the solenoid box to the wastegate. The solenoid box is a bridge between the turbos and the wategate.

Can the profect B control the boost even if my turbos are non-sequential?

Is my wastegate actuator bad?

Well, I will appreciate your help.


I set the switches in actuator mode.
1-ON
2-OFF
3-ON
4-OFF

But i tried all the configurations and no way, nothing happend


Thanx,

My car:

*1993 RX-7
*Pettit 3mm street ported engine.
*Pettit Hybrid high-flow turbos.
*Pettit Unlimited ECU.
*DP
*MP
*No cat
*No pre-cat
*Free flow resonator.
*J&S knock sensor.
*Aluminium fly-wheel
and some extra gauges, temp,boost,a/f.

 

Mine works fine with non-seq. I ran the in hose off the port on the primary compressor housing. and the out hose to the wastegate. I plugged the other wastegate port.

 

Have you tried just running a hose straight from the manifold to the wastegate actuator? You should get a solid 7psi (except in top of 4th or 5th it might creep). If you don't get 7psi or get a lot more then you have a wastegate problem.

Hook up the boost controller like it shows in the manual and it should work fine. If not then try hooking it up like it shows for an FC. You are only using the wastegate actuator so the precontrol hosing is unimportant.

When running non-seq you can use the fuzzy logic feature of the controller.

 

Ok, I will try what you said.

Thanx a lot.

 

i am still trying to figure out what is a single twin?

 

Ok, I´m sorry, I wanted to say non-sequential twin turbos, I mean running together at the same time, working as a single turbocharger.

 

Hello again, I did the test running a hose straight from the manifold -using my boost gauge hose an a T connector- to the wastegate actuator, this are the results:

*There is a vacum leak because I could not read vacum, I read 0 psi. I think the leak is by the wastegate actuator.

*When I test the boost the gauge only reads 5 psi but i know that the real boost was 10 or more because I saw retard in my knock sensor monitor.- I´m using full sensivity-. Again I think there is a leak some where, not in the hose that I used, maybe in the wastegate actuator.

*Finally I connected a hose to the other rotor in the manifold, the behavior was similar, the vacum drops, not to 0 psi because my boost gauge is connected on the another one rotor.


Do you know if I have to close the another inlet -or outlet I don´t know, that one that is not connected at the right- of the wastegate actuator?

Thanx.

 

Thanx, I fix my Problem with the Profec B
Now my Profec B is working perfect!
I didn´t know that the bleeder solenoid outlet at the wastegate actuator should be capped -my turbos are non sequencial-

I bought the car 3 months ago with the boost problem - boost to 15 psi easily, before Profec B-

... but, why that outlet was not capped? so, the pill in the hose between the turbos and the wastegate actuator was not working, the spring in the actuator was never compressed.

Before me, the tuner of the car was the only person that touched the rex, so, what happened?

He drove the car -boosting to 15 psi- and only told me that I need a boost controller. Why he did not check the actuator and hoses?


Well , I am too new in the rex stuff but I´m learning bit by bit.

Thanx to all that help me with this problem!