[blakehunter316]

Ok i am puttin in my autometer sport compIIs today i have a mechanical boost gauge. it says to tap into a vacum line ?? what one would this be? and some one also told me i need to tap a hole in my s/c tubing. which is it? Can any one help me out on this thanks. pics would help to if posible

[flattusmaximus78]

Apologies for going off topic. Are u running your smog pump with your strim. If not did you use a delete?

[blakehunter316]

Originally Posted by flattusmaximus78 Apologies for going off topic. Are u running your smog pump with your strim. If not did you use a delete?

No the bracket assembly just moves it a little bit and the alternator goes beneath it i still have the smog pump.

[flattusmaximus78]

Is your smog pump still hooked up?

[blakehunter316]

yea it is it takes the tube that drops down lower to reach the smog pump and like makes it straight in front of the rest of the tubing. everything is still hooked up yes. so completely legal other than my non catted hpipe

[nolife]

Any vac line will do, you probably have one on the vac tree on the firewall that is not used.
Not technically related but... When you have boost, you need to make sure ALL of your vac lines have some type of clamp on them or they are real tight. Without boost, the vac lines have a tendency to stay on because they are "sucked" on and never have a positive pressure on them. With boost, the pressure can push them off.

[blakehunter316]

Originally Posted by nolife Any vac line will do, you probably have one on the vac tree on the firewall that is not used. Not technically related but... When you have boost, you need to make sure ALL of your vac lines have some type of clamp on them or they are real tight. Without boost, the vac lines have a tendency to stay on because they are "sucked" on and never have a positive pressure on them. With boost, the pressure can push them off.

so like on my fire wall the tree will do like any of those lines will give pressure for the boost ? and do i need to re clamp them?

[flyin ryan]

I used black zip ties on all my vac lines

[blakehunter316]

hmmm well i installed it and it runs at like 14 or 15 vac. i gave it a rev to 3 grand and just managed to get it to just get over 1 psi. so i think it dont make boost till after that any way. so i think it will be ok

[nolife]

Yes, any vac line should okay.
You will not get boost until well into the throttle and under a load and it builds with rpm so your good so far.
I used zip ties too. I still have all of the emissions, charcoal cansiter, fmu, egr, AC, boost retard box etc so there are a lot of vacuum lines. It looks like ass and takes a lot of zip ties but they stay on

Another note. I don't know what instructions or kit you have but somewhere in the install you should have removed and capped off the line from the oil cap breather tube to the throttle body.

[blakehunter316]

Originally Posted by nolife Yes, any vac line should okay. You will not get boost until well into the throttle and under a load and it builds with rpm so your good so far. I used zip ties too. I still have all of the emissions, charcoal cansiter, fmu, egr, AC, boost retard box etc so there are a lot of vacuum lines. It looks like ass and takes a lot of zip ties but they stay on Another note. I don't know what instructions or kit you have but somewhere in the install you should have removed and capped off the line from the oil cap breather tube to the throttle body.

hmm can u elaborate on the part about capping something off ? What lines and y ? Thanks

[notfastenuff]

go off the Vacuum tree on the firewall

[blakehunter316]

I did

[TKOTLARZ]

if u use zip ties just use the small black ones..u cant even see them..just put the lock part of the ziptie on the back side where u cant see it as much

[blakehunter316]

ok I'll prolly do them all eventually I still got a few months before I can get it out any way

[nolife]

Originally Posted by blakehunter316 hmm can u elaborate on the part about capping something off ? What lines and y ? Thanks

If you leave that line attached, you have a path for air between the valve train/oil side of the engine and the intake. On a car without boost, this is fine, you will always have a vacuum there allowing things to vent. Even at full throttle 0 vac, at least you are not putting pressure there. With boost, you are applying that same boost pressure directly to the engine.

Not the best method but as a minimum, you should remove that line, cap both ends and replace the oil cap with a breather.

Some people go a little further with blocking off the PCV and put a breather on both valve covers. It is up to you and depends on how much blow-by, if oil is coming out of the breather, PCV, or dipstick, or how many gaskets and seals you blow out on what you will have to do.

[blakehunter316]

Originally Posted by nolife If you leave that line attached, you have a path for air between the valve train/oil side of the engine and the intake. On a car without boost, this is fine, you will always have a vacuum there allowing things to vent. Even at full throttle 0 vac, at least you are not putting pressure there. With boost, you are applying that same boost pressure directly to the engine. Not the best method but as a minimum, you should remove that line, cap both ends and replace the oil cap with a breather. Some people go a little further with blocking off the PCV and put a breather on both valve covers. It is up to you and depends on how much blow-by, if oil is coming out of the breather, PCV, or dipstick, or how many gaskets and seals you blow out on what you will have to do.

so just pull that line and cap it on the throttlebody and cap it on the valve cover or put a breather on the valve cover? I'm only runnn 5 psi for now so its not alot of boost but now I'm interested in this. Zip ie all vac lines. And pull that one betweeen the covers and t-b and I'm good ?

[nolife]

Originally Posted by blakehunter316 so just pull that line and cap it on the throttlebody and cap it on the valve cover or put a breather on the valve cover?

both, remove and cap the line AND a single breather and you'll be fine. I run 10-12# with just that and have no problems.

I'd keep that line and oil cap around if you have emissions checks, you may need to put em back on to pass.