Boosted Vacuum ???

[Detroiit]

Can I hook a boost gauge to the other port on the pcv valve? I noticed a vacuum line not connected and determined it goes to the pcv valve.. on this same pcv valve is another capped off port. Can the boost gauge be hooked up here? If not ... Is it better to hook a boost gauge on the air intake or after the throttle body?

 

[madspeed]

boost gauge should come from a manifold vacuum source

 

[MikeH686]

The pcv is crank case which should not be in a positive pressure, that should be vented off and for a boost gauge you want it in the intake stream somewhere after the power adder

 

[Detroiit]

The pcv is crank case which should not be in a positive pressure, that should be vented off and for a boost gauge you want it in the intake stream somewhere after the power adder

On the throttle body there is a hole on top that is plugged by a bolt and some electrical tape cause the hole isn't tapped(threads). is this a good spot for the boost gauge? Or ... can I hook it up to a capped port on the vacuum tree on the fire wall?

 

[Detroiit]

The pcv is crank case which should not be in a positive pressure, that should be vented off and for a boost gauge you want it in the intake stream somewhere after the power adder

ALSO... does the pcv go to the upper manifold vacuum ports?

 

[madspeed]

use the vacuum tree, and fix that hacked throttle body port. At least put a vacuum cap on it to ensure it is sealed off, or better yet, run the line to the port on the valve cover as Ford intended

 

[MikeH686]

But since he's forced induction does he want to run it back to the valve cover? I would figure not since you'll be putting a positive pressure into the crankcase I could be wrong with my thinking but just thinking out loud here

 

[Detroiit]

I was looking around the motor and I pulled a hose that wasn't connected to anything. I noticed upon further investigation that the pcv didn't have any hose hooked to it.. so I assume they should be mated?

use the vacuum tree, and fix that hacked throttle body port. At least put a vacuum cap on it to ensure it is sealed off, or better yet, run the line to the port on the valve cover as Ford intended

the hacked throttle body port is just that a hole in the throttle body.. nothing is there or ever was there except a taped bolt. what should be there? its just a hole with no threads.

 

[Detroiit]

here is a pic with the rusted head of the allen bolt shoved into the hole.. right next to the tps.
and I will add it has a new bolt in it because the positive pressure pushed out the rusted allen bolt.
It was taped with electrical tape to bring it up to the inner diameter.

 

[Detroiit]

the port thats after the throttle body(in the pic nothing is going to it) next to the IAC motor, I connected the bypass valve to it for the supercharger.

If you notice in the pic, the tube coming off the valve cover breather/spout is a long tube not hooked to anything.. Did this used to go to that rusty allen bolt hole?

 

[bentley429isBAC]

run the line to the port on the valve cover as Ford intended

No.

 

[Onefine88]

the port thats after the throttle body(in the pic nothing is going to it) next to the IAC motor, I connected the bypass valve to it for the supercharger.

If you notice in the pic, the tube coming off the valve cover breather/spout is a long tube not hooked to anything.. Did this used to go to that rusty allen bolt hole?

Yes the hard plastic hose below the oil filler cap originally went to the spot you mention on the throttle body. Do NOT reattach that to the throttle body. Since it is supercharged it would force "boost" inside the crankcase. I would remove whats left of that line and cap it off and keep the hole on the TB capped off as well.

 

[mikestang63]

Cap off the nipple off the Valve cover. When I had a vortech I did not run a PCV. Instead I ran a hose off it with a catch can and a breather element..

 

[7991LXnSHO]

Cap off the nipple off the Valve cover. When I had a vortech I did not run a PCV. Instead I ran a hose off it with a catch can and a breather element..

Especially boosted, you need the crank case to have some ventilation of blow by. A filtered air catch can breather from the valve cover on most cars, or from the PVC valve on an EFI 5.0, is a good idea. An open breather will usually put oil out on the motor. (See any pre PVC car.) and who really (besides the EPA) wants the oil vapor going back into the intake anyway?

 

[TOOLOW91]

No.

No is correct you don't want to boost te crankcase . Mine is gone and the pcv is plugged with a filter until nick makes my VC and I put the catch can in

 

[Detroiit]

Yes the hard plastic hose below the oil filler cap originally went to the spot you mention on the throttle body. Do NOT reattach that to the throttle body. Since it is supercharged it would force "boost" inside the crankcase. I would remove whats left of that line and cap it off and keep the hole on the TB capped off as well.

Last time I capped the line off I blew out the pcv from the intake on the big end of the track and smoked everywhere.

 

[Detroiit]

Im just so lost.. Lets start over.
1. Cap the breather line that used to go to the throttle body? (Last time I capped the breather line from the TB to valve cover hose I popped out the pcv and oil dripped on the exhaust and smoked something fierce and the end of my 1/4 mile run)
2. Keep a cap on the throttle body.
3. Should I add a breather to the pass valve cover?
4. Should I attach the upper manifold vacuum line back to the pcv valve or get a longer hose and run the hose from the pcv valve to a catch can? (Does a vacuum line need to go to the pcv valve?)
5. Can I plumb in my boost gauge to the hose that used to go to the pcv? (IF infact it is not needed)


6. How bout this what is the best way to go about getting this done right.. I am in Michigan and dont have to worry about emissions.

 

[mikestang63]

Cap off the nipple on the TB and the VC where the hose would go. On the PCV valve, replace the stock PCV with a Turbo Coupe PCV as it is a one way valve and install a hose with a catch can and then a breather element and plug the nipple on he intake where the other side of the PCV hose. Or leave the PCV intake and install a breather element on the VC. The last option you will have unmetered air coming in and you may get some oil mist coming out the breather.