Engine Vacuum: What's Needed And What's Not?

stangboy · Mar 8, 2015

Hey guys I'm getting close to having the car running again and I need to know what vacuum lines are absolutely needed and what ones are not. I'm keeping the power brakes, a/c, and I'm doing MAF conversion. My mods are in my signature and here is the link to my build on the Talk side of this forum. Progress Thread - My First Notch build thread | Mustang Forums at StangNet

I also need to know where is the best spot to source the vacuum on the intake. I've seen it come from the side of the upper intake right before the TB and of course the usual spot under the upper intake....or do I need to use both locations. Also does anybody know if any parts stores sell those little plastic vacuum line that came on the car originally or should I use rubber lines?

Thanks in advance.

madspeed · Mar 8, 2015

need more info... what intake and do you have/need smog equipment?

TOOLOW91 · Mar 8, 2015

madspeed said:
need more info... what intake and do you have/need smog equipment?

What this guy said , My car has zero of that so i have booster, fp reg, the stuff to run the vents, the blower bypass valve , the boost ref sensor . and thats about it . Its all about how the car is setup i have no pcv so thats gone too ,no egr, no smog

stangboy · Mar 8, 2015

I have a Holley systemax intake, no smog. no EGR. I do still have PCV tho.

liljoe07 · Mar 8, 2015

There is no port under the systemax like on the stock intake. All the vacuum ports are behind the throttle body. Mine has 3 ports on the back. One for the FPR, vacuum tree and PCV system.

RangerJoe · Mar 9, 2015

liljoe07 said:
There is no port under the systemax like on the stock intake. All the vacuum ports are behind the throttle body. Mine has 3 ports on the back. One for the FPR, vacuum tree and PCV system.

Same here, with one additional from the valve cover filler neck to the throttle body.

Joe

TOOLOW91 · Mar 9, 2015

RangerJoe said:
Same here, with one additional from the valve cover filler neck to the throttle body.

Joe

Unless you are running boost then that's a no no !

Sent from my iPhone using my fingers while my auto correct makes me seem illiterate

Mustang5L5 · Mar 10, 2015

TOOLOW91 said:
Unless you are running boost then that's a no no !

Sent from my iPhone using my fingers while my auto correct makes me seem illiterate

But that's how the stock setup is.

TOOLOW91 · Mar 10, 2015

Mustang5L5 said:
But that's how the stock setup is.

correct but op is building a 363 I believe with the possibility of boost so I just wanted to throw it in there

Sent from my iPhone using my fingers while my auto correct makes me seem illiterate

RangerJoe · Mar 10, 2015

So just to clarify...you are saying NOT to run it this way IF you have boost?

Joe

FoxMustangLvr · Mar 10, 2015

RangerJoe said:
So just to clarify...you are saying NOT to run it this way IF you have boost?

Joe

Correct, people typically use VC breathers to a catch can with PCV capped off when on the boost.

FoxMustangLvr · Mar 10, 2015

So what are people using to replace these vacuum lines? I'm in the same ball park with extending some and replacing others.

liljoe07 · Mar 10, 2015

Correct. You can still use the line to the valve cover, but it needs to be relocated to part of the intake tract that doesn't see boost. If possible. And the throttle body port gets capped off.

If you leave it in the stock spot, you are doing nothing but building crank case pressure.

TOOLOW91 · Mar 10, 2015

FoxMustangLvr said:
So what are people using to replace these vacuum lines? I'm in the same ball park with extending some and replacing others.

autozone has various sizes and t's by the roll

Sent from my iPhone using my fingers while my auto correct makes me seem illiterate

stangboy · Mar 10, 2015

Ok, I won't be boosted for a very long time. I will have nitrous before the end of the year tho. But as of right now I'm N/A. So is the line from the filler neck to the tb a no no for my setup? Should I just get a breather cap and cap off the little nipple on the filler neck and the one on the TB?

TOOLOW91 · Mar 10, 2015

stangboy said:
Ok, I won't be boosted for a very long time. I will have nitrous before the end of the year tho. But as of right now I'm N/A. So is the line from the filler neck to the tb a no no for my setup? Should I just get a breather cap and cap off the little nipple on the filler neck and the one on the TB?

if your not boosting it yet just leave it normal

Sent from my iPhone using my fingers while my auto correct makes me seem illiterate

Engine Vacuum: What's Needed And What's Not?

stangboy

madspeed

Colonel Mustard

TOOLOW91

If you're the village idiot what's that make me?

stangboy

liljoe07

RangerJoe

I leave the horn on while driving

TOOLOW91

If you're the village idiot what's that make me?

Mustang5L5

That is…until I whipped out my Bissell

TOOLOW91

If you're the village idiot what's that make me?

RangerJoe

I leave the horn on while driving

FoxMustangLvr

I love my Pimp

FoxMustangLvr

I love my Pimp

liljoe07

TOOLOW91

If you're the village idiot what's that make me?

stangboy

TOOLOW91

If you're the village idiot what's that make me?

Similar threads

Engine Vacuum: What's Needed And What's Not?

Colonel Mustard

If you're the village idiot what's that make me?

I leave the horn on while driving

If you're the village idiot what's that make me?

That is…until I whipped out my Bissell

If you're the village idiot what's that make me?

I leave the horn on while driving

I love my Pimp

I love my Pimp

If you're the village idiot what's that make me?

If you're the village idiot what's that make me?

Similar threads

Privacy & Transparency

Privacy & Transparency