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Old 08-20-2007, 06:10 PM   #1
JDM-STI
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Default Prodrive 3 port EBCS plumbing

I've done quite a bit of searching with mixed results on this subject. Whats the correct way to plumb the Prodrive 3 port BCS in interrupt mode? Actually, showing the correct way for bleeding and interrupt would be great, although I really need the interrupt plumbing. Thanks!
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Old 08-20-2007, 10:43 PM   #2
norexyet
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http://theaviationspecialist.com/Sub...ve_bcs_dia.jpg

that is the only diagram that i have for it.
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Old 08-21-2007, 05:04 AM   #3
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here you go man this help me alot when i installed my prodrive bc.
http://www.tarmacwolf.org/dokuwiki/d...boost_solenoid
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Old 08-21-2007, 09:58 AM   #4
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I hate to say it, but try searching a little more next time. This thread is less than a week old and should have everything you need.

http://forums.nasioc.com/forums/show...&highlight=bcs

The prodrive bcs is pretty much the same as the GM or perrin. They are all 3 port interrupt style, and get hooked up the exact same way. Why would you want to install the prodrive as a bleed setup. The purpose of going to a 3 port solenoid is to get away from the bleed setup so there is zero boost pressure on the wastegate when it is closed. I don't even think there is a good way to hook up a 3 port BCS as a bleed style.

-Mike
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Old 08-21-2007, 11:20 AM   #5
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Quote:
Originally Posted by ironhead1230 View Post
I hate to say it, but try searching a little more next time. This thread is less than a week old and should have everything you need.

http://forums.nasioc.com/forums/show...&highlight=bcs

The prodrive bcs is pretty much the same as the GM or perrin. They are all 3 port interrupt style, and get hooked up the exact same way. Why would you want to install the prodrive as a bleed setup. The purpose of going to a 3 port solenoid is to get away from the bleed setup so there is zero boost pressure on the wastegate when it is closed. I don't even think there is a good way to hook up a 3 port BCS as a bleed style.

-Mike
Mike,
The problem is, that I've found a couple of threads here where the guys said that their tuner had them switch the two plastic barbs to the opposite configuration of whats shown in all of the threads that you linked to in order to acheive interrupt mode. I've even had one of the most respected tuners on this forum tell me that all of these listed configurations isn't interrupt mode. I'm just trying to be absolutely sure.
JFYI, Dan @ Prodrive said that it is possible to hook it up in bleed mode. It's just not recommended. I don't care to hook mine up that way, but I would like to know how to if it was ever needed for whatever reason. Never hurts to know.
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Old 08-21-2007, 02:02 PM   #6
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http://forums.nasioc.com/forums/showthread.php?t=981143

The provided routing is correct if you have an internal wastegate. If you have an EXTERNAL then you would want to switch the hoses on the plastic ports. The metal port is routed to the compressor no matter what. Good luck!
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Old 08-21-2007, 03:11 PM   #7
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You can hook up an external gate the same way as an internal in interrupt. Just hook up the bottom/side WG port to the line you'd run to the 1 port on the internal in interrupt. Leave the top WG port disconnected. This works just fine and gives good response.

There are probably a half dozen different ways to setup an external gate with two ports. Just think of it this way. When the solenoid is energized, hook up the lines so boost air is routed in a way to help hold the wastegate shut. When the solenoid is not energized, you should basically allow boost air to push the wastegate open. There is more than one "right" answer here, and each setup will react different and need to be tuned differently.

Also realize you've got at least four possible sources of air pressure. Intake pre turbo, post air filter, atmosphere, boost between turbo and throttle body, and intake manifold.

My approach is to setup these two situations to maximum opening power (BCS at rest) and maximum closing power (BCS energized). I both push and pull then pull and push in the energized and non energized states. The PWM duty cycle and very smart control you get in the DBW ECU gives you the control you need inbetween. Shooting for maximum push/pull and pull/push makes the system the most reactive (small duty changes cause big boost changes), but also tends to help response and threshold.

You can always just touch the BCS lines to the battery (the solenoid is 12VDC so it is ok to do at least for a short period, depending on the solenoid) and try to blow through the ports with your mouth to see how the connections work.


If you read this thread, mainly posts #1, #62, and #202:
http://forums.nasioc.com/forums/showthread.php?t=870619
http://forums.nasioc.com/forums/show...9&postcount=62
http://forums.nasioc.com/forums/show...&postcount=202
I tried to spend plenty of time actually explaining why I route the lines the way I do. It's really not that complex to get a grasp on how it works then plan your own routing.
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Old 08-21-2007, 03:51 PM   #8
JDM-STI
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.Here's what my test results on the Prodrive BCS show.
No power:
1) Blow thru the metal barb------>air comes out of the top barb.
2) Blow thru the side plastic barb------>air doesn't come out anywhere.
With 12V power
1) Blow thru the metal barb------>air doesn't come out anywhere.
2) Blow thru the side plastic barb------>air comes out of the top plastic barb.

So, I guess that there is really two ways to plumb the solenoid in interrupt mode. Either compressor line to the metal barb and WG line to the top plastic barb or compressor line to the side plastic barb and WG line to the top plastic barb. Just depends on which way that you want to map your duty cycle. From 0-100% or 100-0%. I'm not a tuner, but that's what my logic tells me.

Last edited by JDM-STI; 08-21-2007 at 04:05 PM.
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