What a difference the right presilencer makes...

vex · 04-15-2009, 12:57 AM

Quote:

Originally Posted by $100T2

So if I'm missing the actuators, unless the aux ports are wired open, I'm going to be missing some high end power, yes?

It looks likes they're in the closed position from the look of the rods. I would suggest checking to see if they just ended up removing the sleeves. I think you'd be able to tell if they did or not by driving it; do you have to rev the engine before engaging the clutch to move up a hill or on flat ground? If so you may have the sleeves removed. If you're not sure, check. only a few nuts and bolts to undo and look at.

Max777 · 04-15-2009, 08:26 AM

Quote:

Originally Posted by RotaryResurrection

s5 6 port actuators do not work on s4 LIM's...they turn differently than s4. Plus the air gets delivered differently.

Aww, oh well, in that case I will just throw them in the garbage or something... if anyone needs a FREE set of actuators tell me before it's too late guys.

SecondGenPat · 04-15-2009, 07:22 PM

Quote:

Originally Posted by RotaryResurrection

Also, I've never had faith in the headers and silencers that claim to be able to run the 6 ports. There will be little backpressure without an actual cat, and 4-5psi is necessary to operate the ports. You're far better off to just rig something up using the air pump or an electric air pump IMO.

I have always questioned that as well.
One idea I had was to pinch the SAP somewhere along the way to the resonator to act as a restrictor. I would not pinch it all of the way, just enough to provide the proper resistance. Any thought as to why this would be a bad idea?

NoDOHC · 04-19-2009, 07:05 AM

Generating pressure from the pump. I tried it with limited success (used a plate with a very small hole in it what the line bolts to the cat). The pump is not always intelligent about when it pumps air into the exhaust. I had to do something to the ACV as well (I don't remember what it was - too long ago).

I did get it to work pretty well in the end, but I had to put a helper spring on the actuator in order to get it to open at 3500 rpm.

$100T2 · 04-19-2009, 10:25 AM

I looked at the other side of the engine, and there is a block off plate where the other actuator would go. I'm assuming the sleeves have been removed.

04-19-2009, 07:05 AM	#19
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin iTrader: (1) Posts: 855 Rep Power: 17	Generating pressure from the pump. I tried it with limited success (used a plate with a very small hole in it what the line bolts to the cat). The pump is not always intelligent about when it pumps air into the exhaust. I had to do something to the ACV as well (I don't remember what it was - too long ago). I did get it to work pretty well in the end, but I had to put a helper spring on the actuator in order to get it to open at 3500 rpm. __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)

04-19-2009, 10:25 AM	#20
$100T2 Big Daddy Join Date: Feb 2008 Location: Rhode Island iTrader: (2) Posts: 419 Rep Power: 17	I looked at the other side of the engine, and there is a block off plate where the other actuator would go. I'm assuming the sleeves have been removed. __________________ Hell hath no fury like a rotor blown.