its a Turbosmart Ultragate 35 w/10 psi spring.

has 2 sources for vacuum. one is above the actuator and the other is below.

I am not running a boost controller. just the wastegate alone. currently is not allowing the car to boost at all. hits 0 psi and stays there??????

anyone have one of these????



thanks

 

top port-leave open.

bottom port goes to a boost source. between the head and throttle body is the most accurate

edit- other way around...drank my dinner


Modified by Bailhatch at 9:40 PM 8/13/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">bottom port -leave open.

top port goes to a boost source. between the head and throttle body is the most accurate</TD></TR></TABLE>

just found this on Turbosmart website for the 38 ultragate it basically says the opposite of what your saying?????? do u have a Turbosmart wastegate hook up that way and it works????? not saying your wrong, just more confused now...

 

yup sorry top port is open - bottom to IM. All external gates hook up the same im just retarded.

 

Turbosmart is saying to run the Top port between air filter and Turbocharger. Do you think I should do this or not????? what does this do???

 

its supposed to give vac to the top side of the diaphram to make it eassier for the valve to open. i guess it might effectively lower the WG pressure level.

I have hooked up that exact same WG with the top port open and never had any porblems. it held boost rock solid for over 20k miles.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote"> its supposed to give vac to the top side of the diaphram to make it eassier for the valve to open. i guess it might effectively lower the WG pressure level.

I have hooked up that exact same WG with the top port open and never had any porblems. it held boost rock solid for over 20k miles.</TD></TR></TABLE>

sweet, I had it hooked to the Manifold but I just tap the IC piping just after the Turbo and will hookit there. hopefully this will work. I tested the action on the WG and it moves fine. I hope it was just a bad vacuum source. if not, I dont know whats going on. Thanks for the help

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 88crxhfb16 &raquo;</TD></TR><TR><TD CLASS="quote">Turbosmart is saying to run the Top port between air filter and Turbocharger. Do you think I should do this or not????? what does this do??? </TD></TR></TABLE>

If you are not running a boost controller leave the top port open.

Bailhatch says that the top port is suposed to gt vacuum to make it easier to open. But when that WG valve opens the car will be in boost. So if you hook up the top port to a line going to your IM, then it will be pressurized too. Even if the top port is hooked up to a vacuum source I dont know if there is enough vacuum to lift the valve. It still has to overcome your WG spring pressure before it can lift the valve. Even if it could lift the WG valve at vacuum, you wuld want that valve closed so that the transition from idle/vacuum to boost will be faster. If the wastegate vavle is partially open as the car starts making boost, it will make the car feel like it is loosing boost, or the car might make boost slower.

Just leave the top port open.

I

 

the intake manifold is a more accurate source though, since its after the intecooler and other restrictions. But it doesnt really matter as long as you are happy with how it holds boost.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">the intake manifold is a more accurate source though, since its after the intecooler and other restrictions. But it doesnt really matter as long as you are happy with how it holds boost.</TD></TR></TABLE> less boost, would be OK. it has a 10 psi spring in it. I really only wanted to run 8 psi, cause its stock internals b16.

i will the top port open then.

thanks for the help hopefully tommorow will see endless boost

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">the intake manifold is a more accurate source though, since its after the intecooler and other restrictions. But it doesnt really matter as long as you are happy with how it holds boost.</TD></TR></TABLE>

The boost source can be anywhere between the compressor and intake valves. I wouldn't say that the IM is more accurate, I would say that it just changes your boost response. I dont think the restrictions in the intake path is what changes how the WG reacts but it is the strength of the boost source and how quickly it gets from the source to the WG actuator.

The closer your boost source is to the compressor the sooner the faster the WG valve opens and the more open it stays. What this translates to in the car is your boost will feel like it rises slower and you might not even reach the setting of your WG spring.

The further away your boost source is to the WG the later the WG opens and the "slower" the WG valve opens. In the car the "slower" WG opening translates into more boost from vacuum to full boost. Since the WG opens slower the turbine is able to generate more boost from the compressor which raises the amount of boost you have throughout the system.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlueShadow &raquo;</TD></TR><TR><TD CLASS="quote">

The boost source can be anywhere between the compressor and intake valves. I wouldn't say that the IM is more accurate, I would say that it just changes your boost response. I dont think the restrictions in the intake path is what changes how the WG reacts but it is the strength of the boost source and how quickly it gets from the source to the WG actuator.

The closer your boost source is to the compressor the sooner the faster the WG valve opens and the more open it stays. What this translates to in the car is your boost will feel like it rises slower and you might not even reach the setting of your WG spring.

The further away your boost source is to the WG the later the WG opens and the "slower" the WG valve opens. In the car the "slower" WG opening translates into more boost from vacuum to full boost. Since the WG opens slower the turbine is able to generate more boost from the compressor which raises the amount of boost you have throughout the system.</TD></TR></TABLE>

The distance from the compressor may be a factor in boost response(fractions of a second) but I haven't tested it so i dont know. I suspect the response would not be very noticeable in anything but the most poorly designed setup.

What IS a factor is that the pressure losses from both restrictions and the volume reduction of air being cooled by the intercooler, which are not constant, so a pressure source AFTER all these changes is more accurate in the sense that it is actually what is going into the engine.

The reason you might not reach the WG spring rating isn't because its reacting differently as you said, but that you are measuring boost from the intake manifold (like we all do) but actuating the WG off the compressor cover.

 

ahhh, nm I was thinking in terms of boost source strength and how it affects your response time. IM being the weaker boost signal, and compressor being the stronger boost signal. You were looking at it in terms of intake restriction, ie IM having IC pressure loss (weaker source) and compressor having no pressure loss (stronger source).