need help with venting hoses
Thread Starter
Joined: Nov 2001
Posts: 1,794
Likes: 1
From: Slate Hill, NY
need help with venting hoses hi - got car back from shop after cam swap and found 2 heater hoses just hanging under K member. Traced them back to vent ports from the valve covers.
Rear of drivers side VC connects with a "Y" to rear of pass side VC and continues all the way down to k member zip tied to rack.
Front of pass side VC also goes down to k member zip tied to rack.
I thought there should never be un-metered air able to enter the closed system so this baffles me. Mechanic told me to add catch catch can if the leaking oil bothers me.
Anyway, see my pics attached and please offer suggestions.
In current configuration, do you think this is costing HP?
Or does it add to a rougher idle?
One of the pics i'll attach is an old vented catch can i just found in my garage; it has 2 ports on it. Should i attach the 2 heater hoses that are currently hanging down to it until I purchase a normal catch can (the ones that use the vacuum from the tbody ports and intake port, numbered 1 and 2 in attached pic)?
Does it matter which hose goes to #1 or #2? They seem to be both equal in terms of pulling vacuum.
Thanks!
Rear of drivers side VC connects with a "Y" to rear of pass side VC and continues all the way down to k member zip tied to rack.
Front of pass side VC also goes down to k member zip tied to rack.
I thought there should never be un-metered air able to enter the closed system so this baffles me. Mechanic told me to add catch catch can if the leaking oil bothers me.
Anyway, see my pics attached and please offer suggestions.
In current configuration, do you think this is costing HP?
Or does it add to a rougher idle?
One of the pics i'll attach is an old vented catch can i just found in my garage; it has 2 ports on it. Should i attach the 2 heater hoses that are currently hanging down to it until I purchase a normal catch can (the ones that use the vacuum from the tbody ports and intake port, numbered 1 and 2 in attached pic)?
Does it matter which hose goes to #1 or #2? They seem to be both equal in terms of pulling vacuum.
Thanks!
Get a catch can with a pcv valve "Mighty Mouse" can comes to mind..
Run the driver side hose around the intake and to the throttle body barb..
Run one hose from the passenger valve cover to the non pcv Inlet on the catch can
Cap the other passenger vent line on the valve cover
Then connect the pcv outlet of the catch can to the intake manifold just behind the throttle body, on the plastic barb..
Run the driver side hose around the intake and to the throttle body barb..
Run one hose from the passenger valve cover to the non pcv Inlet on the catch can
Cap the other passenger vent line on the valve cover
Then connect the pcv outlet of the catch can to the intake manifold just behind the throttle body, on the plastic barb..
Thread Starter
Joined: Nov 2001
Posts: 1,794
Likes: 1
From: Slate Hill, NY
thanks 
So the rear driver side port just goes right to the tbody barb and doesn't need catch can? street car so no need for overkill and your suggestion fits the bill
So the rear driver side port just goes right to the tbody barb and doesn't need catch can? street car so no need for overkill and your suggestion fits the bill Driver side goes to throttle body, passenger to can
Here's the diagram, and actually I was right. You have a couple options to route the lines..
I like the pcv can he sells since it will allow it to work like the stock pcv system did..
I like the pcv can he sells since it will allow it to work like the stock pcv system did..
2MCHPWR, With you current CC unless the breather filter has a 1-way valve on it (very doubtful), it WILL be getting unmetered air, and will continuously venting oily stinky crank case vapors into the air and engine compartment. If you can somehow remove the breather filter and cap it, or install a Mighty Mouse 1-way valve breathe filter on (if it's the same size) then, and only then would I use that CC. For now just hook everything in the factory PCV system back up. Until you either modify your current CC, get a MMS catch can with a valved breather, or another quality CC without a breather filter on it.
Here's some that I'd recommend.
RX Performance, Saikou Michi, MMS, UPR(w/diffuser), Elite Engineering, AMW
Here's some that I'd recommend.
RX Performance, Saikou Michi, MMS, UPR(w/diffuser), Elite Engineering, AMW
Last edited by 99Bluz28; May 2, 2015 at 12:40 PM.
Trending Topics
Thread Starter
Joined: Nov 2001
Posts: 1,794
Likes: 1
From: Slate Hill, NY
ok so for now, i just connected front port of passenger side VC to t-body port.
Then connected the other heater hose (rear ports of drivers side VC Y piped to rear of pass side VC) to the port at the front of the intake manifold.
went drag racing, 10 hard passes, no issues encountered.
Waiting to see which mightmouse CC I can use that has 2 inlet ports (that'll go to the 2 hoses from my VC's) and one exit going to the tbody port or the intake port (not sure which one; you know?).
Can has no PCV.
Then connected the other heater hose (rear ports of drivers side VC Y piped to rear of pass side VC) to the port at the front of the intake manifold.
went drag racing, 10 hard passes, no issues encountered.
Waiting to see which mightmouse CC I can use that has 2 inlet ports (that'll go to the 2 hoses from my VC's) and one exit going to the tbody port or the intake port (not sure which one; you know?).
Can has no PCV.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
its a shame a top shop would do that. since the pcv is disabled you are however not having unmetered air because you arent bringing in any at all.
you could use one of these my man!
you could use one of these my man!