GReddy Profec-B Spec II
GReddy Profec-B Spec II How many mambers are running a ProfecB SpecII? How did you hook it up? I am getting ready to install mine and I would like some input before I get started, thanks.
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From: Norn Iron
Install was easy, just make sure you use the correct ports on the solenoid for your type of wastegate.
I've seen a lot of people complain about this boost controller and how hard it is to setup. I've never had that issue though and have setup several of them.
I've seen a lot of people complain about this boost controller and how hard it is to setup. I've never had that issue though and have setup several of them.
Well the wastegate I have is a Tial 38mm or whatever the upgrade is for the STS kits, so when I run the line from the brake booster back to the wastegate I first run it to the solenoid and then to the wastegate,right? Or is there something else I am missing. Thanks guys.
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From: Norn Iron
Boost control systems usually take their boost source from the compressor cover.
Not the intake manifold or brake booster line.
the only boost source that will go to the intake, is one for purposes of monitoring actual boost pressure within the unit, and for display on the built in gauge.
Not the intake manifold or brake booster line.
the only boost source that will go to the intake, is one for purposes of monitoring actual boost pressure within the unit, and for display on the built in gauge.
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From: Norn Iron
Most turbos have a threaded takeoff on the compressor cover.
If it doesnt, either drill and tap in a suitable location, or weld on a take off on a boost pipe close to the turbo.
Where does the boost signal to your wastegate currently come from ?
If it doesnt, either drill and tap in a suitable location, or weld on a take off on a boost pipe close to the turbo.
Where does the boost signal to your wastegate currently come from ?
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I haven't finished installing the kit yet, but as per STS's instructions they say to splice into the brake booster hose and run a hose back to the wastegate, so I was thinking if that is what they recommend to install then I should just run the hose to the GReddy solenoid and from the solenoid to the wastegate.Do you think it would be more beneficial to get the boost signal from the compressor housing and not splice into the brake booster hose?
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From: Norn Iron
Originally Posted by Blkdoutbird
I haven't finished installing the kit yet, but as per STS's instructions they say to splice into the brake booster hose and run a hose back to the wastegate, so I was thinking if that is what they recommend to install then I should just run the hose to the GReddy solenoid and from the solenoid to the wastegate.Do you think it would be more beneficial to get the boost signal from the compressor housing and not splice into the brake booster hose?
Normal is to take it from the compressor cover, which is how your Greddy instructions will also show it.
Why is it a weird thing to take a boost source from the brake booster? That is where most members get their signal for their boost gauges.So why would it be so weird to use that same vaccum/boost source for the wastegate.
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From: Norn Iron
Because you dont bleed air off a boost guage.
You do bleed air off the boost control system in order to increase boost when using any form of boost controller.
And there is no need to apply vacuum to a wastegate.
You do bleed air off the boost control system in order to increase boost when using any form of boost controller.
And there is no need to apply vacuum to a wastegate.
I believe the reason that the STS instructions say to plumb all the way to the brake booster is for those that aren't using a boost controller. Otherwise, because of the losses of the long tubing runs, you won't get full boost when you run off the WG spring.
I had the manual boost controller with the solenoid to switch from low to high for the STS kit. I used the boost source on the turbo and it worked fine for whatever I wanted to dial in.
BTW. I have a Profec II spec b in the skittle and it was simple to hook up. The instructions were obviously written by someone that doesn't know english that well, but if you understand the basic principles of how it works, the pictures are all you need.
I had the manual boost controller with the solenoid to switch from low to high for the STS kit. I used the boost source on the turbo and it worked fine for whatever I wanted to dial in.
BTW. I have a Profec II spec b in the skittle and it was simple to hook up. The instructions were obviously written by someone that doesn't know english that well, but if you understand the basic principles of how it works, the pictures are all you need.
so what did you do for the 4mm hose with the inline filter they want you to run? Is it unneccessary for our types of applications? Also to get the signal from the compressor cover there is a small black allen insert on the cold side, is that where I get the signal from? Also with twins do I need to run both of them to a t and then into the boost controller and then to the wastegate? Or would I just need to get the signal from one?
Originally Posted by Blkdoutbird
so what did you do for the 4mm hose with the inline filter they want you to run? Is it unneccessary for our types of applications? Also to get the signal from the compressor cover there is a small black allen insert on the cold side, is that where I get the signal from? Also with twins do I need to run both of them to a t and then into the boost controller and then to the wastegate? Or would I just need to get the signal from one?
Originally Posted by enginjoe
The filter is just to keep junk and oil out of the pressure sensor. You don't have fittings on your turbo compressor housing for the hoses? Twins?
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From: Norn Iron
Originally Posted by Blkdoutbird
The filter is for the line that they want ran to the fuel pressure regulator, so do I hook that one up too? I was under the impreesion that I don't need to hook up that connection.So if I do hook it up where do I get a vaccum source from the fuel pressure regulator?
For the built in boost guage etc, you need a signal line from the intake manifold.
There are times, when it is quite apt, to reccomend taking it to someone competent to fit, and set up the parts you have bought.
I think this is one of these times.
That is why I was asking how you would hook up the Greddy unit, because the FPR is not accesible, and according to Greddy's instruction manual they show it going to the FPR. So my question was, do I hook it up to anything at all or just plug off the hole in the back of the unit.
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From: Norn Iron
OK, it appears there is a misunderstanding.
Originally, you said your instructions required a connection to the fuel supply...
As the instructions clearly indicate, this is NOT the case. It is offering you an easy boost/vac source, for the controller itself, which it may be indicating from the boost/vac source going to the FPR, as most normal cars use.
The LS1 obviously does not use this, as it doesnt use a conventional FPR setup..
All you need going into the controller itself, are power, and a boost/vac source, taken from the intake manifold ( forgetting boost control/solenoid plumbing )
So, a small diam line off the brake booster would suffice for this.
This WILL NOT do for the boost source for wastegate control though. Take that from the compressor cover.
Originally, you said your instructions required a connection to the fuel supply...
As the instructions clearly indicate, this is NOT the case. It is offering you an easy boost/vac source, for the controller itself, which it may be indicating from the boost/vac source going to the FPR, as most normal cars use.
The LS1 obviously does not use this, as it doesnt use a conventional FPR setup..
All you need going into the controller itself, are power, and a boost/vac source, taken from the intake manifold ( forgetting boost control/solenoid plumbing )
So, a small diam line off the brake booster would suffice for this.
This WILL NOT do for the boost source for wastegate control though. Take that from the compressor cover.
