I know this is a long shot, but does anyone(HAILERS?) know if the N/A ecu shoots out a signal out ~2700 that I can use to actuate my dual scroll? TIA
edit: setup is s4 n/a block, all s4 t2 accesories, S4 N/A (326?) ECU

 

Not that I know of.

Really, don't worry about it. If there is no twin scroll solenoid and no vacuum line going to the turbo's twin scroll actuator, it will FAIL SAFE to the wide open position. That means you'll get full boost as long as you don't attach a vacuum line to it.

It will mean a slightly slower spool up. Some people say they don't really notice the slower spooling.

A fifty dollar RPM switch from SUMMITRACING can be used to switch it if you want to do that.

 

Yeah, that's (rpm switch) what I was thinking. Personally, I have driven without and with, and I feel there's a huge difference. Anyways, thanks for the heads up.

 

Nope. Get an rpm switch, or even better, a TII ECU. It plugs straight into the NA loom and requires two small wiring changes.

Even if you did (foolishly) attach a vac line straight to the actuator, it would still open the flap as soon as you opened the throttle, so max boost wouldn't be affected.

And I'd bet those people had a non-functioning (i.e. broken) system to start with, hence no difference.

 

Aw shucks. I shoulda figured out the vacuum there/vacuum gone thing. Still, the end result is like not having a vacuum line on it.

Seems you could get a series four ECU for fifty or so plus a boost sensor to compliment it for another ???????? fifteen? Sometime in the future. Maybe EBAY or the for sale on this forum?

 

I doubt you'll need to worry about twin scroll with the high compression rotors. You'll make 5 pounds just revving in neutral as long as the exhaust is clear.

 

Yeah so far I love the driveability with the high comp rotors. I am planning to run TII ECU, just trying to find a decent price on one. OT, but Aaron I know you went FMIC from the start, one thing I don't think people realize is the TMIC sits on top of the N/A oil fill.