shaheed

the spec II comes on with the ignition (if you wired it up correctly that is!). here is how it installs on my lindsey dual port, the tial has the ports reversed so keep that in mind. tee off the IC pipe banjo bolt, send one line to the top port of the wastegate, the other line goes to the NC port on the solenoid. a line goes from the COM port on the solenoid to the side port of the wastegate.

DDP

Shaheed,
Does that Lindsey dual port act like a EBC dual port? Does it hold better to redline than a MBC in single port? Thanks

awilson40

So... this would be correct for the Tial / Profec ???
Any real benefit in connecting single VS dual ???
Another question.(bear with me)
I have my boost gauage 'T'd off the KLR like. can I 'T'
off this for the signal to the Profec or is it best to run a new line to the manifold?
Thanks

schnellfahrer

I don't understand how a EBC can improve spoolup. I have an Accuboost. It is set to open the WG at 18 psi.
What is the difference with an EBC set to open the WG at 18psi?

shaheed

9fitty1 it works like any dual port wastegate. as far as holding boost to redline, i never had a problem with that, but i have an aftermarket turbo.

awilson given the reversed ports that looks correct. remember the NO port should be left open to vent. i don't think there is much point in running a dual port wastegate in single port mode with an EBC. in my installating i simply replaced my vdo gauge that i had teed off of the klr line with the spec ii. with the peak boost and last boost features i find it to be a more convenient display than the gauge (easier to read quickly too). personally i wouldn't tee the KLR line twice, but that's just me.

schnellfahrer i'm not qualifed to answer that question, my real world experience is just that it does. YMMV.

theedge

MBCs will bleed a little bit of boost, its almost impossible to prevent.

EBCs use a solenoid or a stepper motor to control the airflow, theres no way that the air can force that open.

Bengt Sweden

All mechanical control devices have to open gradually in advance to get you to the set boost level in the end, otherwise they would overshoot. An electronic control system, especially an adaptive fuzzy logic device will learn the characteristics of the system and open the exact amount at the right time to directly hit the set boost level.

Bengt

NZ951

Try not to tap off the KLR line... its really best to keep that one clean and dedicated. Just a general best practice thing...

schnellfahrer

What function has the line to the KLR when you have deleted the CV and use aftermarket chips?
(other than for the boostgauge).

awilson40

The more I think about it...I cant see how there is a performance gain between connecting dual port or single port unless you have a dual solenoid controller.
By connecting singleport, if the controller fails or is off, then boost PSI is limited by wastegate spring pressure. Connected dual port, then there is no 'fail safe' at all...or is there?
I still dont see a benefit in running the extra line for dual port

NZ951

Well you cant cannect a dual port setup unless you have a dual port solenoid...

Bengt Sweden

..and then the failsafe work in the same way. Inactive controller = basic boost level ( spring controlled)
bb

awilson40

Thanks...so If I get a Profec spec 2 I need to connect it in single port config .
Am I correct that the profec comes with a single solenoid valve?

DDP

So even though there arnt any soleniods it will still work as dual port. And it cost me about 300 less...interesting. But there is no 'bling' factor.

NZ951

I dont know solenoid it comes with, I was looking into it a year ago, I think its a denso unit. It will be a solenoid to run in dual port, meaning it has three ports. If you had a stock wg, then you would have to use a 2 port solenoid. This is because the stock WG acts like an integral WG. Bottom line, if you get it, run it in dual port. The Porsche WG is odd being effectively a single port, its not the norm.