Catch Can ??
02-26-2015, 05:56 PM
#1
Melting Slicks
Thread Starter
Catch Can ??
Hi
I have seen this for a long time and do not have a clue what it does and how hard is it to install?
Thanks
Alan
I have seen this for a long time and do not have a clue what it does and how hard is it to install?
Thanks
Alan
02-26-2015, 06:18 PM
#2
Racer
Check out this thread. Easy to install and two popular manufacturers are RX Performance and Elite Engineering.
https://www.corvetteforum.com/forums...-catchcan.html
02-26-2015, 06:36 PM
#4
The pvc system on a corvette is broken down to two systems, since you want to vacuum draw the oil vapors out of the motor to keep the motor oil clean.
During less than WOT, engine vapors are vacuum drawn out of the valley cover and vacuum drawn into the intake manifold after the TB vain by the intake manifold vacuum. This is called the dirty side.
During WOT, the intake manifold itself drops vacuum, so the vapors are drawn out of the valve cover and pull into the intake in front of the throttle body vain where there is vacuum instead during WOT. This is called the clean side.
Although both the valley cover port, and the valve cover ports both have baffles to limit the amount of oil that is drawing into the intake through the ports, if you are bouncing off the rev limiter, this creases more piston blow by to increase the amount of vapors pulled into the engine, and at the same time, the baffles in both covers and valley cover tends to get saturated with oil and oil will get past the baffles to be drawn into the intake manifold.
As for catch cans, they are mostly just installed on the dirty side.
Using this photo, the dirty side port out of the valley cover is the silver nipple dead center of the photo, and just above the black wire loom for the TB. Just above it, the dirty intake port into the intake manifold that is the black nipple. On the OEM set up, there is just a hose between these two ports.
So on a catch can to catch the dirty side oil that make is past the valley baffle, the lid connector out of the catch can gets connected to the silver port to catch the oil out of the dirty port that make is way back the valley cover baffle, then the side port out of the catch can gets connected to the black nipple back on the intake. Hence any oil that make is past the valley cover baffle is just deposited into the catch can, instead of it making it way into the intake manifold/down into the heads instead.
As for taking it one step farther and catch the oil on the clean side too,
To the left of the blue oil filler cap, is the gold port out of the valve cover. This would connected to the top of another catch can, and the port out of the side of the catch can would be either connected to the top silver port on the TB, or if you have a 05 car that does not have that port on the TB, then it would connected to the port on the flex connector just in front on the TB instead.
Again, most only install a catch can on the dirty side, but if you are going full out to keep the oil that makes is past any baffle out of the intake manifold, you want to catch both the clean and dirty sides both. As for while someone does not make a side by side chamber catch can set, so it can be used to catch both the clean side, and the dirty side, is beyond me (read end up having to mount two catch cans side by side instead).
During less than WOT, engine vapors are vacuum drawn out of the valley cover and vacuum drawn into the intake manifold after the TB vain by the intake manifold vacuum. This is called the dirty side.
During WOT, the intake manifold itself drops vacuum, so the vapors are drawn out of the valve cover and pull into the intake in front of the throttle body vain where there is vacuum instead during WOT. This is called the clean side.
Although both the valley cover port, and the valve cover ports both have baffles to limit the amount of oil that is drawing into the intake through the ports, if you are bouncing off the rev limiter, this creases more piston blow by to increase the amount of vapors pulled into the engine, and at the same time, the baffles in both covers and valley cover tends to get saturated with oil and oil will get past the baffles to be drawn into the intake manifold.
As for catch cans, they are mostly just installed on the dirty side.
Using this photo, the dirty side port out of the valley cover is the silver nipple dead center of the photo, and just above the black wire loom for the TB. Just above it, the dirty intake port into the intake manifold that is the black nipple. On the OEM set up, there is just a hose between these two ports.
So on a catch can to catch the dirty side oil that make is past the valley baffle, the lid connector out of the catch can gets connected to the silver port to catch the oil out of the dirty port that make is way back the valley cover baffle, then the side port out of the catch can gets connected to the black nipple back on the intake. Hence any oil that make is past the valley cover baffle is just deposited into the catch can, instead of it making it way into the intake manifold/down into the heads instead.
As for taking it one step farther and catch the oil on the clean side too,
To the left of the blue oil filler cap, is the gold port out of the valve cover. This would connected to the top of another catch can, and the port out of the side of the catch can would be either connected to the top silver port on the TB, or if you have a 05 car that does not have that port on the TB, then it would connected to the port on the flex connector just in front on the TB instead.
Again, most only install a catch can on the dirty side, but if you are going full out to keep the oil that makes is past any baffle out of the intake manifold, you want to catch both the clean and dirty sides both. As for while someone does not make a side by side chamber catch can set, so it can be used to catch both the clean side, and the dirty side, is beyond me (read end up having to mount two catch cans side by side instead).
02-26-2015, 08:03 PM
#6
Melting Slicks
Thread Starter
Thanks Guys after owning vettes since 1968 l am always amazed with the different ways people come up with ways to take our money. I have never had a problem unless l caused it myself.
Alan
Alan
02-27-2015, 06:59 PM
#8
The reason for this, the engines are now running direct injection, with the gas sprayed directly into the head, instead before the intake valve in the manifold runner . So this means that oils sucked down the intake manifold via the PVC system are going to bake to the outside/top of the intake valve, and will require a great deal more intake manifold treatments to clean the intake valves through the life of the motor.
Note, at least the motor is not running turbo's like the eco boost where such intake cleaner treatments will kill the turbo, and fords solution to the valve deposits to to replace the entire head instead.
To add, C7 motor would be a huge candidate for a meth kit right off the bat. Why, by drawing meth down the intake to keep the system clean (including the intake manifold and top of intake valves), the kit would pay for itself the first time you have to pay for the dealer to do a intake system cleaning instead.
Normal intake track of a direct injection motor over time,
With the C-6 motors, oil that is deposited on the top of the intake valve is cleaned off via fuel, since the injector location is before the valve in the intake manifold last of runner instead. A for meth kit, still has its merits over just a slight power gain, since it will not only help to keep the intake manifold clean, but the piston chamber parts as well (steam cleaning effect).
Last edited by Dano523; 02-27-2015 at 07:03 PM.
03-07-2015, 02:26 PM
#9
Race Director
The pvc system on a corvette is broken down to two systems, since you want to vacuum draw the oil vapors out of the motor to keep the motor oil clean.
During less than WOT, engine vapors are vacuum drawn out of the valley cover and vacuum drawn into the intake manifold after the TB vain by the intake manifold vacuum. This is called the dirty side.
During WOT, the intake manifold itself drops vacuum, so the vapors are drawn out of the valve cover and pull into the intake in front of the throttle body vain where there is vacuum instead during WOT. This is called the clean side.
Although both the valley cover port, and the valve cover ports both have baffles to limit the amount of oil that is drawing into the intake through the ports, if you are bouncing off the rev limiter, this creases more piston blow by to increase the amount of vapors pulled into the engine, and at the same time, the baffles in both covers and valley cover tends to get saturated with oil and oil will get past the baffles to be drawn into the intake manifold.
As for catch cans, they are mostly just installed on the dirty side.
Using this photo, the dirty side port out of the valley cover is the silver nipple dead center of the photo, and just above the black wire loom for the TB. Just above it, the dirty intake port into the intake manifold that is the black nipple. On the OEM set up, there is just a hose between these two ports.
So on a catch can to catch the dirty side oil that make is past the valley baffle, the lid connector out of the catch can gets connected to the silver port to catch the oil out of the dirty port that make is way back the valley cover baffle, then the side port out of the catch can gets connected to the black nipple back on the intake. Hence any oil that make is past the valley cover baffle is just deposited into the catch can, instead of it making it way into the intake manifold/down into the heads instead.
As for taking it one step farther and catch the oil on the clean side too,
To the left of the blue oil filler cap, is the gold port out of the valve cover. This would connected to the top of another catch can, and the port out of the side of the catch can would be either connected to the top silver port on the TB, or if you have a 05 car that does not have that port on the TB, then it would connected to the port on the flex connector just in front on the TB instead.
Again, most only install a catch can on the dirty side, but if you are going full out to keep the oil that makes is past any baffle out of the intake manifold, you want to catch both the clean and dirty sides both. As for while someone does not make a side by side chamber catch can set, so it can be used to catch both the clean side, and the dirty side, is beyond me (read end up having to mount two catch cans side by side instead).
During less than WOT, engine vapors are vacuum drawn out of the valley cover and vacuum drawn into the intake manifold after the TB vain by the intake manifold vacuum. This is called the dirty side.
During WOT, the intake manifold itself drops vacuum, so the vapors are drawn out of the valve cover and pull into the intake in front of the throttle body vain where there is vacuum instead during WOT. This is called the clean side.
Although both the valley cover port, and the valve cover ports both have baffles to limit the amount of oil that is drawing into the intake through the ports, if you are bouncing off the rev limiter, this creases more piston blow by to increase the amount of vapors pulled into the engine, and at the same time, the baffles in both covers and valley cover tends to get saturated with oil and oil will get past the baffles to be drawn into the intake manifold.
As for catch cans, they are mostly just installed on the dirty side.
Using this photo, the dirty side port out of the valley cover is the silver nipple dead center of the photo, and just above the black wire loom for the TB. Just above it, the dirty intake port into the intake manifold that is the black nipple. On the OEM set up, there is just a hose between these two ports.
So on a catch can to catch the dirty side oil that make is past the valley baffle, the lid connector out of the catch can gets connected to the silver port to catch the oil out of the dirty port that make is way back the valley cover baffle, then the side port out of the catch can gets connected to the black nipple back on the intake. Hence any oil that make is past the valley cover baffle is just deposited into the catch can, instead of it making it way into the intake manifold/down into the heads instead.
As for taking it one step farther and catch the oil on the clean side too,
To the left of the blue oil filler cap, is the gold port out of the valve cover. This would connected to the top of another catch can, and the port out of the side of the catch can would be either connected to the top silver port on the TB, or if you have a 05 car that does not have that port on the TB, then it would connected to the port on the flex connector just in front on the TB instead.
Again, most only install a catch can on the dirty side, but if you are going full out to keep the oil that makes is past any baffle out of the intake manifold, you want to catch both the clean and dirty sides both. As for while someone does not make a side by side chamber catch can set, so it can be used to catch both the clean side, and the dirty side, is beyond me (read end up having to mount two catch cans side by side instead).
03-07-2015, 02:30 PM
#10
Race Director
Must be an LS1 motor ,i just looked at mine.can anyone tell me where to hook up a catch can on an LS3 motor? Where is the PVC?
03-08-2015, 12:16 AM
#12
Dirty and clean in and out ports are all show in the photo, and close enough between the motors to show all the port locations for the purpose on hand.
On the LS-2, the clean side intake port is not on the TB, but on the coupler in front of the TB instead.
03-08-2015, 10:58 AM
#13
Race Director
While this for ls1 it is so close to ls3 would be hard to tell difference between the two.
http://www.eliteengineeringusa.com/t..._Catch_Can.pdf
http://www.eliteengineeringusa.com/t..._Catch_Can.pdf
