[CrackedDSM]

All this stuff goes miles above my head, but I'm still gonna play with it one day when I grab a 3 port solenoid.


Can anyone throw up a diagram or tell me how to wire in an aftermarket 3-port solenoid in the stock BCS location?

[Ibbanez]

Hey man, I promise its really really easy.  If you get the solenoid I can show you how to wire it up and how to set it up in Jackal.

[onewhiteguy]

cut off the connector that goes to your stock BCS, wire the two wires to the new MAC solenoid, polarity does not matter, that is it....here is a diagram for hose routing.....

[jrohner]

I use a 3-port fuel pressure solenoid.  I've also used the other 3-port solenoid, i think it's EGR.

It was the only way I could get my 16G to hold almost 30psi all the way up -- FPS a boost controller and a Holset WGA.

[OZ Rally]

I'm also using the MAC valve wired into the stock location. It's getting a bad boost spike after 5000 rpm. Goes from 19 psi to 30+. Can anyone let me know what to change around, whether it's boost cut or duty cycle? Thanks

[OZ Rally]

I also have my solenoid hooked up following the picture on the left.

[onewhiteguy]

try adding more DC to 5000+ areas and see what happens, i think the higher the  DC the lower the Boost.....

[OZ Rally]

try adding more DC to 5000+ areas and see what happens, i think the higher the  DC the lower the Boost.....

From other research I've done, it says the lower the DC lower the boost. I've raised it to 120% at 5000 rpm and higher, seems to hit 30 psi a lot faster.

[onewhiteguy]

I'm not sure then, mine works backwards, lower the dc value the more boost I run, if I set them all at 28% I run around 30psi, if I lower it to 24% I run 35psi...

What spring is in your gate?
 

[hakcenter]

Try adjusting the 4k a bit lower, and take DC down as far as you can (for the 5k cell), 0 I believe.. that should be full vent ??

Otherwise.. it doesn't seem to be bleeding enough pressure off. How do you have the valve setup ?? With the screw in filter thingy in the middle ?

You could always hook up an air compressor on the lines... then just key on / car off, edit the 0rpm cell till you figure out if it is working properly.


Otherwise I'd say... make the vacuum hoses smaller.

[OZ Rally]

Try adjusting the 4k a bit lower, and take DC down as far as you can (for the 5k cell), 0 I believe.. that should be full vent ??

Otherwise.. it doesn't seem to be bleeding enough pressure off. How do you have the valve setup ?? With the screw in filter thingy in the middle ?

You could always hook up an air compressor on the lines... then just key on / car off, edit the 0rpm cell till you figure out if it is working properly.


Otherwise I'd say... make the vacuum hoses smaller.

I will give that a try tomorrow at work. I have the filter in the middle port of the solenoid. Let you know how it goes.

[OZ Rally]

Okay so today I took off the wastegate and tried applying pressure to it and it would not open. So I applied shop air to it instead and it opens up fine. Next I tried pushing the valve down with a screw driver and that wasn't happening. I took the cover off to inspect the spring, diaphragm, and valve movement and it was all fine. Cleaned up the diaphragm, spring and valve and put it together. When I installed it I connected the lower port wastegate straight to the compressor housing fitting. Test drove it, 2nd gear pull. Hit 20 psi then spiked to 26 psi at 6200 rpm and held all the way to redline. So I'm suspecting faulty wastegate. Any input?

[hakcenter]

What is the spring pressure ? Have you tried just the wastegate itself with just boost reference on the bottom ?

[OZ Rally]

What is the spring pressure ? Have you tried just the wastegate itself with just boost reference on the bottom ?

Not sure about spring pressure but I did run straight boost pressure from turbo to lower port on wastegate. It's erratic to 20 psi then climbs to 30+ psi.

[hakcenter]

Seems to me like a faulty wastegate if you can't control boost, unless you got a 50 psi spring on it. You check the unit to see if it moves at all ? Dismount it and apply pressure to both ports, 1 at a time.