I have tried it on two cars thus far but they both have mods but i think a 100% stock kappa will work just as well. Less Lag:

http://www.exhaustdepot.net/techsection.html

Get a 3/16" vacuum T. Its 9pm on teh east coast so walmart is still open so hopefuly one of you guys will have it done by tonight.

Intresting, i always wondered why there was a solenoid to the surge valve.
To check that the solenoid is cutting off air to the surge valve you could install 2 boost gauges before and after the solenoid and monitor both gauges while boosting and see if the one after the solenoid shows less pressure.
Whose got 2 boost gauges handy?

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1993 talon tsi awd - stock on the outside, modded on the inside
2007 solstice gxp - Solo Performance 3" mach exhaust + hiflow cat - dyno sheet

If you could show a before picture side by side with the after picture you have on the linked page, it would be very helpful.

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so if the solenoid is impeding performance, why did pontiac put it there?...does it serve any positive purpose?

Its not to impede performance, but more to control it. Its basically nanny controls that gm put in just like in the n/a solstice.

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1993 talon tsi awd - stock on the outside, modded on the inside
2007 solstice gxp - Solo Performance 3" mach exhaust + hiflow cat - dyno sheet

slowing a spool up doesn't help them controll the engine, probably adds stress rather then reduces it too, it creates a surge of boost rather then then a smooth transition which can't be good.

they are giving a 100,000 mile warantee on the engine and we can't blame them for making sure there is no more pressure then they think can hold out for that stress

however this solenoid would add stress to the engine in my opinion and I am wondering how pontiac thinks it benefits the power plant

It reduces stress on the drivetrain, a small turbo spools up instantly and can produce a shockload on the tranny/diff/axles. Simply slowing down the quick spooling turbo alleviates this.
Did you notice in the ic pipe dyno thread that the tps only opens up 83%? Pretty stupid imo, but from gm's standpoint it makes sense to limit output from the engine. Im sure theres more nanny controls we'll run into, these seem to be the first 2 that were found.

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1993 talon tsi awd - stock on the outside, modded on the inside
2007 solstice gxp - Solo Performance 3" mach exhaust + hiflow cat - dyno sheet

I am neither engineer nor mechanic and accept your analysis...would like to see exhaust depot's take on what pontiac thinks the solonoid is doing as well

Hector...Excellent post and info. I can nearly understand it but then again I ain't too sharp. Please post photos that tie the whole proceedure together. Hopefull this week I'll receive my IC pipes and HKS BOV so may do this mod. Previously it had been discussed that for best results both the OEM surge valve and BOV should be allowed to work together. This proceedure seems to refute that. Your comments on this please.

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Chuck
Lt. Col. USAF Ret.

Hector...Perris's comments make sense to me. Please comment to his post quoted above.
Many thanks...Obviously Hector...We need you!

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Chuck
Lt. Col. USAF Ret.

his comments make sense to me too chuck, I did respond to his post but neglected to add his quote to which I have just edited into my response up top

Guys i posted this late lastnight and did not have pix up when i charge my camera ill take better pix.


1. What is the solenoid for?

I beleive its a form of safty but I dont want that saftey. It can work as what is known as a POP OFF VALVE, or a SAFTY REALEAS VALVE. If you disconnect the hose going to the surge valve, chances are you will boost 8lbs or so, i haven ot tried it yet. What ever it is that you boost, thats what the spring inside that surgevalve is. A pop off valve is setup to open at X amount of boost so you dont overboost your engine. Its not a BOV.
I think however that the solenoid is used mainly to give you some lag at the lower RPM band so you dont peal out etc, because if you get alot of boost down low and your a newbie on driving a turbo car you can break the tires loose easier. So they give you a progressive increase in boost as your RPM goes up. These are my assumptions , it is not law.

2. How it works:

The valve has spring tension plus boost tension keeping it close. Lets say the spring is 5 lbs and we are boosting 10psi. We now have 10psi at the turbo, in the plumbing and in the manifold. We also have 10psi pushing the solenoid close plus the 5lb spring. So 15lbs is more than the turbos 10 so the valve stays closed.

If the ecu sees to much boost, it can close the solenoid so now the boost in the turbo overcomes the 5lb spring so boost goes down. It can do this in theory, but im not sure if it does it or not. I do feel strong that it does this though:

When your at a low RPM, the surge valve opens some causing your boost to be low, as you go up on the RPM the surgevalve closes so now your boost goes up.

The main reason of the surgevalve is to act as a BOV, to keep howfast the turbo comes online i beleive is its secondary mission.


3. HOW ITS HOOKED UP:


If you look on the intake manifold you will see the solenoid (pic on lin above in first post). It has a nipple pointing down, up and one to the left. You install a T fitting as shown. You remove the Left line and hook it up to the T-fitting. You cap off the Left nipple with a vacuum hose cap or you can trim about 1" of vacuum hose, put it over the nipple and put a bolt in it.


The T-fitting will also go to an aftermarket BOV so if you have a BOV in your car you will need to add a second one. You can cut onto the BOV vacuum line going to the upgraded BOV and T into there so you dont have two T on top of each other by the manifold.




1 PM AND IM YET TO HEAR ANY FEEDBACK FROM YOU STOCK GUYS WITH THIS MOD!!!!!!!!!! AUTOZONE IS OPEN ON SUNDAYS!!!!!


YO!!!!!!!!!!!!!!

well, I'm a tad cocnerned about warantee..have to wait a bit to see results myself but am surely interested


traction control would prevent this

also, is this mod acceptable in showroom stock class raccing?

also, would the ecu pull timing or mixture to compensate for the extra booste?

[quote=perris;480349]well, I'm a tad cocnerned about warantee..have to wait a bit to see results myself but am surely interested



traction control would prevent this
QUOTE]

then turn it off and have some fun

This will do 0 to your warrantie because you cant see whats going on. Your not raising your boost of your car so chances are you will not have to worry about any racing class yoru in. The sensors will do their job to give you teh fuel you need.