Thule

few years ago i ditched my pcv system. i wanted to get rid of all those hoses in my quest for a nice looking engine bay,

i had run breathers before on my older US cars, and never had any issues, and i cant realy say i have any issues w/the breathers now, i can feel a little smell when the car idles, but no moisture in the oil, and no blue smoke

what worrys me though is the pressure in the block, and possible powerloss?

i gave my pcv system to someone else, and my ls1speed valve covers have no connections for pcv hoses,

i've bin thinking of getting a catch can, and make a new pcv system, and as i dont have the old one, i need to do this from ground up,

is it enough to get some caps in the holes the breather where in, and route a hose from them to the catch can, and connect the catch can to the throttle boddy?

any ideas gladly accepted,

LS1121

iTrader: (17)

I have a thread on here somewhere with what is needed just do a search and should find it. Hey but the way did that Big Mountain ever stop smoking?

Undertow74

iTrader: (45)

what i would do is swap to the LS6 valley cover, that way there you get rid of all the hoses(that you currently dont have) and just run a catch can between the valley and the TB.

3rdCoastPowerSports

iTrader: (5)

im in the same boat as the OP... im in for the learning

Blk98Vert

iTrader: (2)

Just do the LS6 valley cover

Droptopws6

iTrader: (13)

Here's how I did mine, the block is a '97 and needed trimmed.

Thule

this is clearly the thing to do,

my car is made in 97, probably with the earlyer ls produstions, but i have a 99+ style block, do they also need the trimming?(trimmed)

Droptopws6

iTrader: (13)

I'm not sure about your block, but if it does it's pretty easy with a dremel. I circled the area that needs trimmed.

Thule

thanks man, i will try to get hold of one of these, brilliant that i dont need the hoses, and can keep my breathers for fun.. they look good

99Bluz28

iTrader: (35)

You need do this to pull the crank case pressure/vapors out.

IMO, you'll need to drill and tap a hole in the top front or rear of the drivers side valve cover then install a 90* fitting (with 3/8" barb) of your choice, then run a 3/8" ID oil/fuel line hose to your catch-can, then into you intake. Now for you fresh air inlet remove you current breather and replace it with a pvc breather(w/3/8"barb) .I used a Earl's Performance #3434114ERL and I removed the pcv valve(any equivalent breather will work). Now you'll want to run a length of 3/8" ID hose from the TB fresh air outlet and attach to to the 3/8" barb on you new pcv breather.

That's it you're done!

Here's mine but I do have the LS6 valley cover, and I run 2 catch cans.

Thule

that sound like what i had in mind, the valley cover is a good solution though, but boring to get the intake off to install it,

99Bluz28

iTrader: (35)

You don't have to change the valley cover, I don't think my LS6 valley cover did anything(oil in intake)except remove the hose from the driver side valve cover.

pm sent.

Thule

thanks for the pm, is it ok to use hardlines to route the air?

99Bluz28

iTrader: (35)

Yeah, if that's what you want, it shouldn't be a problem.