Hey guys, i am not sure if this topic is already cover it here but i did a search but nothing comes with the particular setup! Anyway i have seeing a lot people using the pfc to control boost with a Mac solenoid. I recently bought a turbosmart dual port 75 IWG for my 8374 setup, I was wondering if it's possible to keep the greddy solenoid (3 port) in conjunction with the dual port setup? If so what is the exact right way to plumb it? Or i need the 4 port Mac valve to get the full benefit of the entire setup? I am trying to see if i can get boost in low gear than current BW actuator, my initial gold is set it low, 8,psi, 14, then 20.
Tnx,
Khris

 

a 3 port solenoid is a 3 port solenoid for the most part. and a 2 port 2 chamber internal wastegate of this type is just like an external gate except the ports are reversed. So the top port on this 2 port internal gate is like the bottom port on an external gate. Note that it is NOT like the FD stock 2 port wastegate. That's a single chamber design which is functionally like a standard internal wastegate.

when all else fails, read the manual

https://system.netsuite.com/core/med...c2ba4&_xt=.pdf

 

compare to a 3 port MAC solenoid on an external gate (from AEM Tru Boost manual):



greddy solenoid is functionally the same as the MAC/AEM solenoid unless they changed suppliers or something

 

Hey Man thanks for the info, I did read they manual but was not sure if the greddy solenoid is different than TS E-boost c, I guess I was going off on greddy port (no, com, nc) when compare to port 1,2,3, just could not apparent they logic of port name.

 

Com means common. It's always open. It's the same as port 2.
NC means normally closed. It opens when the solenoid engages and is same as port 1.
NO means normally open. It closes when the solenoid engages and is the same as port 3.

These are basically industrial pneumatic solenoids sold under various brands.

 

Off topic....But I did experience my first ever failure of a Mac Solenoid! my 4-port took a crap on me. I'm actually a fan of the BW Solenoid. It works Great. Still havn't been able to take advantage of a 4-port.

 

Can i plumd it with my 3 port? Yes you can. Uce the top port on the turbosmart. This way it will function like a normal one port.
Do i need the 4 port to get all the benefits out of my 2 port turbosmart? Yes you do! Lets say your target boost is 20 psi, then the 4 port mac valve will shut the wastegate closed until 20 psi is reached. On and of throttle between 0-19 psi, the waste gate never opens.
With a 3 port solenoid, the wastegate will live a life of its own, opening and closing all the time, and you will have fluctuating boost when near the targeted boost. The 4 port fixes the mecanical shortages of the 3 port

Mannykiller: you would absolutely benefit from a 4 port. When drifting your map moves all over the place, a 4 port gives you more power by controling boost in a better way then a 3 port was designed to do.

Btw excuce my english, im from norway.

- Auning

 

That is what I was hoping for when I installed it. But haven't had the time to get it working. Do you have a part number to one that's worked well for you?

I know what you're saying is correct.. But I'm more visual.. So I'd have to look at a diagram in order up fully understand the mechanical advantage over a 3 -port solenoid ✔

P.s.. your English was pretty spot on till you decided to flag your spelling in that last comment haha👌😂🏁

 

You can read about the 4 port here

https://www.full-race.com/store/efr-series/full-race-4-port-boost-control-solenoid-1.html/

it also shows how to conect it.

hope this helps :-)

 

Basically it supplies pressure from the 4th port to aid the mechanical spring in the WG to ensure that it can't open at all. Then it stops supplying pressure to that side of the WG when you reach your boost threshold and instead supplies pressure to the other side to open the WG.

 

Update: I decided to try this setup and the end result is that I am over boosting to 20 psi, before with the BW oem actuator I was seeing as low as 11 psi spike to almost 13, now i am spiking to 20 psi with medium throttle.

 

Using the 3-port setup? What is your exhaust size? What is the target boost level in PFC?

 

I am using the 3 port setup? Exhaust is RB dual CB, Rx7 store resonated midpipe, and Turobosure manifold and downpipe. Bosst setting is 1.50 kg/cm primary and secondary is set at 1.00 kg/cm.

Btw i am using the 2nd picture of the showing the twin port actuator setup.