OK I went to dyno my car last saturday and ended up wasting $150 only to discover that something is wrong. We couldn't go past 8psi. With my excellent artisitic talent I mananged to create this masterpiece which will perfectly identify every part and it's place in the vacuum line chain. What's wrong with it? Oh, and it's a manual boost controller if it matters.

 

you don't need the vacuum line going from the compressor housing to the BOV

 

what lb spring do you have in your wastgate? it could also be that boostcontoller!

 

Well the BOV is an HKS w/ 2 nipples off an old fmax kit, and I just ran it how they said to in the manual. The spring is set at 6. We have tried 2 different boost controllers to no avail.

 

I don't think that picture is correct.

You need to hook up the controller to the top of the WG. Side of WG goes to regular vacuum which is usually from the compressor. The BOV only needs from IM...why are there 2 vacuums to the BOV?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boofster &raquo;</TD></TR><TR><TD CLASS="quote">I don't think that picture is correct.

You need to hook up the controller to the top of the WG. Side of WG goes to regular vacuum which is usually from the compressor. The BOV only needs from IM...why are there 2 vacuums to the BOV?</TD></TR></TABLE>

it depends on the type of boost controller. if you are using a ball/spring, then you have it set up right. but why do you have 2 lines to the bov?

 

Yah, i would hook up the MBC from the compressor to the wastegate. Thats how all my DSM buddies are hooked up.

 

Nobody knows what that second nipple on top of my BOV is for? It's the same HKS that came with the old fmax kits

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by calmweed &raquo;</TD></TR><TR><TD CLASS="quote">YOUR PROBLEM LIES WITH YOUR bov. the other BOV nipple is a BREather probABLY.....

Do the following: Intake Manifold-&gt;BOV
Intake Manifold-&gt;Turbo Compressor
Intake MANIFOLD-&gt;mbc-&gt;wg

Also dont do whAT I DID. i used the vac off the purge SOLENOID WHICH IS a turned on by the ECU....thAT Was A STUPID MISTake...

(sorry for the keyboARD. a=cAPS ON THIS Damn thing)</TD></TR></TABLE>

Ok I'm going to follow this info for now unless anyone has something else to chime in.

 

why would there be a hose, from the intake manifold to the compressor?

you just need to go

Intake mani -&gt; Bov
Compressor -&gt; MBC
MBC -&gt; Wastegate

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CivicTurbo12 &raquo;</TD></TR><TR><TD CLASS="quote">
Compressor -&gt; MBC
MBC -&gt; Wastegate</TD></TR></TABLE>

if you run a line from the IM to WG you will get a better boost reading,
at the IM it reads boost after the pressure drop across the IC.

i agree with the way calmweed said to do it.

 

calmweed... why does he need a line from the IM to the compressor? that makes no sense. here is the BEST way to do it:

Tee off the brake booster line for the BOV.

go from the compressor, to the mbc to the side port of the WG (and if you are getting a pressure drop then just turn up the f'ing boost)


if you have a mbg, then you can tee off the fpr line and send it through the dash.

 

does the boost controller have a way of relieving the pressure between itself and the wastegate when you shift gears and the wastegate closes. if not maybe there is air trapped between the wastegate and the boost controller holding the wastegate open. i had this problem w/ the ball and spring style manual boost controller i had and i added a small vent (had to play w/ the size a little to get it right) between the boost controller and wastegate to relieve this trapped air when the wastegate closes between shifts.

 

Well now I have completely 2 different setups, can someone just tell me how they ran their vacuum lines on their stock motor with just a MBC properly? That's it really, I just want my car running right. Thanks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cdog19 &raquo;</TD></TR><TR><TD CLASS="quote">Well now I have completely 2 different setups, can someone just tell me how they ran their vacuum lines on their stock motor with just a MBC properly? That's it really, I just want my car running right. Thanks.</TD></TR></TABLE>

Here is what you need.

Don't listen to anyone else.

Intake manifold to Blowoff valve
Intake manifold to MBC then to Wastegate like you show.
Put a nipple plug thing on the compressor outlet nipple.

End of story.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jays91DXhatch &raquo;</TD></TR><TR><TD CLASS="quote">

Here is what you need.

Don't listen to anyone else.

Intake manifold to Blowoff valve
Intake manifold to MBC then to Wastegate like you show.
Put a nipple plug thing on the compressor outlet nipple.

End of story.</TD></TR></TABLE>

Unless anyone else wants to elaborate on another concept and as to why it's better in lag/boost control/etc. then that's it. Thanks.

 

does it have a top and bottom nipple like the greddy s bov? you can hook it up either with just 1 hose or 2.

2 hoses - the top one goes to the intake manifold and the bottom goes to the compressor.

1 hose - leave the bottom open.

edit: pix bottom.


Modified by wowsers at 5:13 AM 4/17/2004

 

It's a turbo XS dualstage, it's working fine.

 

Would a boost leak with this setup possibly lead us to only be able to boost 8psi max consistantly???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wowsers &raquo;</TD></TR><TR><TD CLASS="quote">does it have a top and bottom nipple like the greddy s bov? you can hook it up either with just 1 hose or 2.

2 hoses - the top one goes to the intake manifold and the bottom goes to the compressor.

1 hose - leave the bottom open.

everything else looks good. there are many different ways to hook everything up. what mbc are you using? </TD></TR></TABLE>

PLEASE GO TO GREDDY'S SITE AND LOOK AT THE "FAQ" PAGE!!!!!!! One of the 2 outlets, nipples, what ever you want to call it, IS A VENT!!!!. hooking both up to boost/vacume could result in damage to the BOV, turbo or the motor is self.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jays91DXhatch &raquo;</TD></TR><TR><TD CLASS="quote">

Here is what you need.

Don't listen to anyone else.

Intake manifold to Blowoff valve
Intake manifold to MBC then to Wastegate like you show.
Put a nipple plug thing on the compressor outlet nipple.

End of story.</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18cx &raquo;</TD></TR><TR><TD CLASS="quote">

PLEASE GO TO GREDDY'S SITE AND LOOK AT THE "FAQ" PAGE!!!!!!! One of the 2 outlets, nipples, what ever you want to call it, IS A VENT!!!!. hooking both up to boost/vacume could result in damage to the BOV, turbo or the motor is self.

</TD></TR></TABLE>

couldn't find the faq page but....

http://herpetology.com/dsm/bov.html

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maxim &raquo;</TD></TR><TR><TD CLASS="quote">Actually, you have slightly better BOV response by running a tube from the bottom fitting of the BOV to the fitting on the side of the compressor side of the turbo. In fact, the instructions that come with the Greddy Type S recommend that you do it that way, but that may only be for high boost applications.


[Modified by maxim, 8:57 AM 4/4/2002]</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DeepSi &raquo;</TD></TR><TR><TD CLASS="quote">Here is an explantation of the lower nipple for the Greddy Type S....

The GReddy valve has two fittings for small vacuum lines on it. The top fitting is for the same hose that went to the original stock bypass valve, the hose that goes to the intake manifold. The lower fitting is normally left open. It is a vent for the lower chamber of the valve.

On some cars with large turbos, compressor surge at light throttle lifts can be further reduced by connecting the lower fitting to a pressure source. Typically a fitting is added to an I/C pipe between the turbo outlet and the valve.

</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Flamenco-T &raquo;</TD></TR><TR><TD CLASS="quote">the one on upper part is wher eyou hook it up, the one on the lower part is if you're having trouble keeping up with higher boost, then you hook it up too.

stan
</TD></TR></TABLE>

just remebered these from when i wondered about it myself.

 

this should be the correct way. if im not mistaken...

Intake mani -&gt; Bov side
Compressor -&gt; side of WG
intake mani-&gt;MBC -&gt; top ofWastegate

 

thanks for your help guys

 

Oh gEez, Can someone be more artistic and Draw a correct way of doing this? Its wayy easier seeing this as pictured...

Im a noob with this, Its just like being a kid, learning from pictures, yet fom words.. -=P

For Example, with a VAC manifold , Be nice. -=P Or without..