OK, im almost done......now, my PVC valve is hooked to the default drivers side cover....when it was TPI ......it had that molded metal tube on the passenger side that ran to the throttle body....do I need that or can I just run a filter style push in on the other cover or does it have to go thru the throttle body?.and then can I just plug the hole on the TB?......also in the hole in the cover theirs a baffle built-in to the cover....will that be ok to put the push in on?



another thing, damn the HSR does not allow for alot of room on the drivers side for plug wires due to the tall valve covers and the wiper motor..

 

Since nobody has responded I'll give you my 0.02.
What you want is fresh air in (filtered) and bad air out.
The side of the motor only matters as to what is easier to route the hoses.
You want to use the hole on the TB that is in FRONT of the throttle blades to supply filtered, fresh air into one side of the motor.
Use the hole on the TB that is behind the throttle blades (or just into the plenum) to connect at the PCV valve in the valve cover.
That way you have circulation and vacuum pulling out the bad stuff.
The PCV will act as a controlled vacuum leak so if you find you are flowing too much, be sure it is clean and working correctly. Could also try a different valve from another V8 app.
I believe (but never confirmed) that flow rates are different.

 

If you've got MAF, you'll want to take the fresh air for the PCV from the throttle body before the throttle blades so that you don't have unmetered air coming in.

 

Isn't that what I said ??
"You want to use the hole on the TB that is in FRONT of the throttle blades to supply filtered, fresh air into one side of the motor."

I did forget to say incoming air to one valve cover, outgoing should be from the other opposite corner.

 

I didn't say it wasn't what you said, I was addressing his question about using a breather.

 

Never mind, I'll start my own thread on this

 

this is what Im talking about.,.....I know that the pvc goes on the other cover...that where Ive got it and I have it running to the hole under the HSR plenum...but on the TPI there was that metal tube that went from where I now have the filter to the hole in the TB....I see alot of HSR owners just pluging the hole and running a filter like I have...

will that do or does it need that tube routed the way it was?

 

Do you still have a MAF sensor?

 

yes I do....

 

Then you don't want to use the breather.

 

how come?..ive seen alot of HSR over on an other forum with breathers in and they also have maf....

THe hole that Im thinking of pluging is after the MAF....so how would that affect it?

MAF meters in coming air.....has nothing to do with air after it....right?

 

The breather will allow unmetered air to bypass the MAF through the PCV system.

 

you could just block that off. use a good oil cap with a seal on it. that might even produce a small amount of vaccum and help the rings seal. more ring seal equals more power.

 

see like this....they are plugged...

 

If you did that, you wouldn't have a fresh air source to flush blowby gasses out of the crankcase.
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Is there a PCV valve anywhere in that system though?

The PCV system pulls clean air in to the plenum through the PCV valve. At idle, this is a significant proportion of the air entering the engine. The factory system uses the breather tube to the throttle body to make sure that the air through the PCV system has been measured through the MAF.If you use a breather, none of the air taken into the plenum through the PCV system has been measured.

 

well crap!...I dont want to use that tube or any other peice of hose....theres just to much clutter on that side...but if I should.....crap!

 

exactly, the engine is sealed off. creating vaccum. they sell vaccum pumps for about $400.

 

and that means what? ..I cant wait to finish this freaking headache

 

you don't have to have a pcv valve. you can do that like is in the picture and block off the throttle side and put and open breather in the valve cover.

but then you would have a bunch of blowby coming out of the filter. wich will slightly smoke.

i run a pcv valve hooked up on my engine because it builds up so much crankcase pressure that it blows oil out sometimes.

i don't have a MAF. so i hook mine straight to the manifold.

since you do have one you can hook it up to the throttle body.

 

i'll just use this....then it will be just like it was when it was tpi and stock...I'll try and find a formed tubing that fits right and looks half ***....

 

I went with 2 open breathers on my motor. I will tell you that I will not do it again. I have not performed a leakdown on the motor but it only has 2000 miles on it and every time I drive it, there's oil on the valve cover not to mention that the crankcase pressure is forcing oil out of my timing cover and oil pan.

I'm in the process of pulling the motor to reseal it and add a good PCV system or even a vacuum pump if necessary.

Interestingly in High Performance Pontiac, there was an article where they performed a chassis dyno test on a mid 300 hp car that was suffering from blow by. They added a Moroso crancase evacuation pump and picked up
14 hp and almost 20 lb. ft. of torque!

I'm going with the PCV and a breather piped into the throttle body. If this doesn't work, Plan B is the Moroso pump.

www.geocities.com/dzperf

 

Correct me if I'm wrong, but the air flow in a PCV system is INTO the crankcase thru the breather (or the pipe connected to the throttle body), thru the crankcase, and then OUT the PCV valve and into the plenum or intake manifold. Hence the reason the plenum sometimes has oil in it - it's oil sucked up thru the PCV valve.

Consequently, the SOURCE of the air entering the crankcase on the passenger's side can either be a breather OR air that has already been filtered (and gone thru the MAF if so equipped). Either one can be used with no difference in effect, right?

 

Except on a MAF car. With the MAF system, ALL air that enters the intake, MUST pass through the MAF first, in order that the ECM can be aware that it's there, and can put in fuel for it. Since the PCV valve admits air into the intake, the make-up air MUST be drawn from somewhere downstream of the MAF, such that the whole PCV circuit just acts like a detour around the TB for part of the air. If you don't adhere to this rule, you will have ALL KINDS of trouble getting the car to idle and cruise right (high-vacuum low-flow situations where that PCV flow is a significant part of the engine's total air intake), because it will run WAY lean on account of the unmetered air being let into the intake by the PCV.

 

That makes perfect sense for a MAF car - thanks for the education!

 

Be careful to make sure that type of cap does not have the PCV built into it.
The air will be flowing into the valve cover on that side.
I ran the top hose to the same location with the bottom hose run underneath about 1/2 way back.
The bottom hose then loops under the plenum to the front of the driver side valve cover where my PCV valve is. Came out pretty clean looking.
Remember to figure for the oil fill cap too.
this is just as I was finishing the motor. I have higher res pics but too big to post. If you want them just yell