Here is the product-



I have a question...

If you are drawing say 3-6 vacuum lines from 1 source (fpr) is that going to yield a weaker reading? I know when I gave my BOV it's own separate vacuum source it had a MUCH louder pitch. So my assumption here would be having a separate source from the intake manifold will yield a more accurate reading. The rule of thumb that I have always followed was to give each component its own individual pressure source. I understand that pressure is constant throughout the manifold and all sources should remain equal in theory, but when you start dividing up one source six different ways, that should attribute to minor inconsistencies. I know in some of my mechanical engineering labs that I have taken, when we have done pressure testings we have always used one source to monitor certain variables instead of sharing one to acquire reading for several variables.

This thread is in no way criticizing Golden Eagle... They are a company of great quality in my opinion. I am just curious as to the design of this specific product.

 

I've been reading that a good thing to do with the vacuum box is to place it inline with the brake booster and that shouldn't cause any weakening in the pressure.

I'll personally be using a McMaster Carr 4 port.

 

True about the brake booster, but aren't you then compensating the pressure going to your brakes? I might be overlooking something here and if I am someone please correct me, but to me stopping is more important then having 2 or 3 extra T fittings in my vacuum lines...

At 5-7psi you don't notice a HUGE difference... But for instance if you are running 20-25psi I would think the inconsistencies would be greater. As stated before, I could tell a HUGE difference with my blow off valve for instance.


Modified by GudeH23a at 4:47 PM 10/4/2003

 

I went the McMaster route and made one. I'm using all six ports if I remember correctly. Everything is working fine. Boost gauge reads a hair over twenty in vacuum. I'm pulling vacuum from a spot off of the manifold....I didn't even tap into the brake booster.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GudeH23a &raquo;</TD></TR><TR><TD CLASS="quote">True about the brake booster, but aren't you then compensating the pressure going to your brakes? I might be overlooking something here and if I am someone please correct me, but to me stopping is more important then having 2 or 3 extra T fittings in my vacuum lines...

At 5-7psi you don't notice a HUGE difference... But for instance if you are running 20-25psi I would think the inconsistencies would be greater. As stated before, I could tell a HUGE difference with my blow off valve for instance.


Modified by GudeH23a at 4:47 PM 10/4/2003</TD></TR></TABLE>

i would also like to know if it would mess up brakin time??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by egturbo &raquo;</TD></TR><TR><TD CLASS="quote">
i would also like to know if it would mess up brakin time??</TD></TR></TABLE>

Nah, it shouldn't really affect anything. The brake booster vac-line has a 1-way check valve, so it never actually "sees" boost or anything except vaccum. From a little bit of testing, the system seems to hold enough vaccum for 1.5-2 (usually) good uses of the brakes. I'm pretty sure this is a safety system incase your engine dies but your car is still rolling, you've got a power assisted brake or two left before you're back to the hard as heck to engage non-assisted.

Hope that helps,

Ryan P.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Too_Smooth &raquo;</TD></TR><TR><TD CLASS="quote">I went the McMaster route and made one. I'm using all six ports if I remember correctly. Everything is working fine. Boost gauge reads a hair over twenty in vacuum. I'm pulling vacuum from a spot off of the manifold....I didn't even tap into the brake booster.</TD></TR></TABLE>

Same here. Works good and mcmaster is MUCH cheaper ;x.

 

i've noticed a difference on my GE manifold and im using all 6 ports. I've noticed that my BOV is not as loud and the main thing that i noticed was with my boost controller. Before i had the GE manifold, i wasnt getting good boost/vacuum reading with my boost controller and it wasnt boosting passed 17 psi. I gave it it's own source and it solved the problem. then i added the GE manifold and the problem came back with my boost controller, i believe its not getting adequate boost/vacuum reading, so im gonna give it it's own source again.

EDIT: My boost/vacuum source is not tapped on the brake booster, it has its own port on the intake manifold and its a smaller diameter hose than the brake booster hose, same size as the PCV valve hose.

 

bumpity bump bump bump for some more feedback to conclude my hypothesis.

 

For a vacuum manifold to properly work you need a good size supply line. I like the idea of placing it inline with the brake booster. That hose is plenty large enough to run more then just the brake servo.

You should see no ill effects in braking with the manifold inline. And all of the accessories that you run off of it should be fine with that large of a vacuum source.

 

i bought the mcmaster carr 6 1/8 npt port...plus 2 1/4in npt port...i have the brake booster tee into the 1/4 port (before the one way valve..)
the other 1/4 port is plugged up..and i have my bov, msd btm, map sensor, boost guage hooked up to 4 of the 6 1/8 ports..the 5th port i have hooked up to one of the stock nipples sticking out of the intake manifold for double the vac sourc to fill the port chamber..and the last one i have plugged...i have my wastgate running directly to the other available stock nipple on the intake mani...

btw...i have a 98 prelude...and the intake mani ...i believe has more nipples than other motors...so please check first...before mapping anything out..

 

So then are you doing this to clean everything up, or because you think that at higher boost everything will be more consistent..... at first you said you noticed something was better(bov) but then you said it was inconsistent and that adding it would increase you're inconsistancies........ i would agree without a large enough source, the problems you mention would become worse, however if you have a large enough vac source..... I don't see why everything wouldn't level off..... but then again, you also need to figure in the lenght of the lines, I didn't think this mattered, until I took thermodynamics....... and later confirmed it by noticing that if I shortened the vac lines from my boost control, (both the one from the wg and the one from the compressor) i got a much quicker response from the solenoid and also a better reading on the guage(the one built into the controller)....... so I would say just keep whatever setup you have now, or even better, if you need another good source........ tap the ITM for another plug......... m pretty sure that would work... anyone care to second that??, I'm guessing

 

im definitely interested in a reply

 

I agree with you.


The vacuum source needs to be considerable to supply the manifold.