I've searched on this subject and it seems there are different ways of doing this but no real definitive sure fire way to go.

My TB is capped off and I have 2 breathers on the p/s VC, PCV on the driver side and no AIR pump. I'm thinking of a 3rd breather on the driver side next. Would that be enough and not cause damage? Haven't cranked the new engine yet as I'm still ironing out some things as what to do and this being one of them. I had a AMW catch can but sold it as it killed my NA engine so I'm a little skeptical on that. My only other option would be this but I've heard mixed results w/ this setup as well. 383 F1 w/ 22+psi

 

i have my motor setup like vortech tells you too,have the stock Evac on the valvecover,cap TB off,add a oil/water seperator in the hose and run the rest of the hose to the intake of the blower tubing.

 

I just have the breather on the valve covers, as well as another line that goes from the intake back down to the inlet tube for the D1SC, and I have had no issues.

The more ventalation you can give your boosted motor the better.

 

I use the evac kit you have pictured with 22+PSI it works fine. I was actually suprised at the amount of suction it provided.

 

>quick question about the bungs that attach to the headers... did you guys weld them to the header or drill and tap them?

 

Drill and weld. I don't see a good way to tap the headers you need to bring these into the header at around a 45 degree angle.

 

>weld... got it!
But 45 degrees is that up, down in or out? I have absolutely no idea

PS what did you do with that Civic???

 

Any pics of this done, I am a Visual Learner, lol.

Also in your guys opinion when is this neccesary on a Motor. I will only be spinning my D1SC 383 to about 6200RPM.

 

There was a thread discussing this sometime ago. It may or may not answer some of you're questions. http://web.camaross.com/forums/showt...Crankcase+Evac

Here's the pics I had posted on that thread showing my Crankcase Evac install:

 

Supposvely that setup is suppose to be good for only "race cars" without mufflers. Mufflers add to the back pressure making that setup not work very well for a street application.

I have seen Electric Vaccum pumps be used on the street. Still trying to figure everything out myself.

 

Well I run a straight through "muffler". Most of my backpressure is prolly attributed to the bends in my exhaust, not the muffler itself. My car is by no means race only. Regardless of said backpressure, this evac system manages to create a large amount of vacuum, even at idle (it'll suck you're hand to it quite easily). Perhaps I'll stick a gauge on one of the tubes and measure the actual suction so you guys can compare it to other systems. I'm not trying to say "this is better" that is pointless without actuall data to compare. I'm just saying this system works for me....just my $.02...

Seems to me the velocity of the exhaust would lend to more importance when creating suction than anything else. So perhaps the diameter of the piping, and more importantly, the placement of the flutes would effect the efficiency more so than what muffler you're running.

 

Wow thanks for all the responses. Didn't expect this many. For 50 bucks I think that isn't a bad way to go w/ what American383 did to his. I'd have to have those pipes welded to my ORP on my FLP. I have a GMMG exhaust so it's not really a muffler so to speak but hearing about Jeff 96 SS having success with his is promising too. I'm just trying to minimize any issues the best way possible as I don't want to be blowing out seals on a new engine.

What are doing w/ the U shaped PCV hose w/ that evac kit? Leaving it in or capping both ports? That's the only thing I don't know what to do about. Thanks again guys for the help!

Silas,

 

here is somthing I got off the Ls1 Turbo boys at Ls1tech. Run a -10An fitting from each valvecover into a catchcan with a Filter. That seems to work for them. On a FI setup we don't need a vacuum pump, N/A probably would.

 

N/A already has manifold vacuum.

 

Huh? A vacuum pump relieves the crankcase pressure and would be needed on a high horsepower forced induction car. It'll actually help pick up a few horsepower as well as increasing the life of the rings. I am using a Cadillac 4/6/8 vacuum. I was lucky enough to find a brand new GM pump. This thing sucks pretty hard. I am also using a vented catch can to pick up any oil so that it doesn't get into the pump (even though this pump is built to handle the oil).