Are catch cans necessary with single turbo setups?
03-28-11, 08:03 AM
#3
how much boost are you planning on running?
i personally wouldn't bother running a catch can unless i'm running more than 16-18psi on a stock 9.0:1 GTE.
maybe i'd run a catch can on an NA-T setup and 10psi or so, but the engine compression is like 10.0:1
i personally wouldn't bother running a catch can unless i'm running more than 16-18psi on a stock 9.0:1 GTE.
maybe i'd run a catch can on an NA-T setup and 10psi or so, but the engine compression is like 10.0:1
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03-29-11, 05:49 AM
#8
I was reading this yesterday. A catch can setup is only about $75 if you do go that route.
http://cjsupra.kendra.com/PCV-Can.html
On the other hand, Ive seen more JZ motors without catch can setups than ones with catch cans.
http://cjsupra.kendra.com/PCV-Can.html
On the other hand, Ive seen more JZ motors without catch can setups than ones with catch cans.
03-29-11, 09:21 AM
#9
The catch can's main purpose is to relieve Crank case pressure and IMO, has more to do with the amount of power that you're making versus what PSI you're running at. Someone could be running 20psi and only making 450rwhp which wouldn't require one and someone could be running 20 psi and making 600rwhp that might require one.
If you're up there in HP, then I say it's good to run.
Also, if you have a nice can, it enhances the look of the engine bay too...
If you're up there in HP, then I say it's good to run.
Also, if you have a nice can, it enhances the look of the engine bay too...
03-29-11, 10:23 AM
#10
The catch can's main purpose is to relieve Crank case pressure and IMO, has more to do with the amount of power that you're making versus what PSI you're running at. Someone could be running 20psi and only making 450rwhp which wouldn't require one and someone could be running 20 psi and making 600rwhp that might require one.
If you're up there in HP, then I say it's good to run.
Also, if you have a nice can, it enhances the look of the engine bay too...
If you're up there in HP, then I say it's good to run.
Also, if you have a nice can, it enhances the look of the engine bay too...
My DSM started having blowby issues at 30psi. I had to install a spring on the dipstick to keep the damn thing in place. I'm not sure if the GTE or GE is known for popping dipsticks but I know in the DSM world this can cause a huge oil fire! If your running really high boost pressures, blowby and excess crankcase pressure is a concern. AN lines ran off the valve cover can remedy this and the catch can is literally just that, a place to catch the oil instead of blowing it everywhere.
03-29-11, 11:45 AM
#11
everyone has some form of blowby period.. pcv cannot keep the oily residue out of the intake tract which can promote detonation from the the residue ..for the majority of us with more then 75k on the clock , oil sealing rings etc dont quite seal like a factory fresh motor..next time you guys have some time , remove your upper intake plen wether it be na-t or gte and look in the lower runner ports i bet you will see traces of oil in there which is no good in the combustion chamber..
03-29-11, 02:18 PM
#12
gte & na-t
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You right ED when i pulled my intake manifold it had some oil in it lol, i guess this time i will install a catch can... thanks OP for this thread learn something new everyday...
03-29-11, 04:24 PM
#13
Driver School Candidate
If you do end up routing your PCV to something, please dont leave it routed to an idle catch can in the engine bay. I used to make this same mistake back in the day. It's not really benefiting you in any way other then catching some oil that blows by.
Route it to something that pulls vacuum.
You want to either route it to the exhaust (past the o2 sensor) or to the intake pipe before the turbocharger. Either one will pull a considerable amount of vacuum on the lines, creating a scavenging effect. It works much more effectively this way and is extremely helpful once you really start making some power.
-Isaac
Edit: If you really want to use a catch can setup, route the valve covers to a baffled catchcan. Then route the baffled catchcan to either the exhaust or the intake pipe pre-turbo to create a scavenging effect on your crank case.
Route it to something that pulls vacuum.
You want to either route it to the exhaust (past the o2 sensor) or to the intake pipe before the turbocharger. Either one will pull a considerable amount of vacuum on the lines, creating a scavenging effect. It works much more effectively this way and is extremely helpful once you really start making some power.
-Isaac
Edit: If you really want to use a catch can setup, route the valve covers to a baffled catchcan. Then route the baffled catchcan to either the exhaust or the intake pipe pre-turbo to create a scavenging effect on your crank case.
Last edited by slow4cyl; 03-29-11 at 04:33 PM.
03-29-11, 06:35 PM
#14
If you do end up routing your PCV to something, please dont leave it routed to an idle catch can in the engine bay. I used to make this same mistake back in the day. It's not really benefiting you in any way other then catching some oil that blows by.
Route it to something that pulls vacuum.
You want to either route it to the exhaust (past the o2 sensor) or to the intake pipe before the turbocharger. Either one will pull a considerable amount of vacuum on the lines, creating a scavenging effect. It works much more effectively this way and is extremely helpful once you really start making some power.
-Isaac
Edit: If you really want to use a catch can setup, route the valve covers to a baffled catchcan. Then route the baffled catchcan to either the exhaust or the intake pipe pre-turbo to create a scavenging effect on your crank case.
Route it to something that pulls vacuum.
You want to either route it to the exhaust (past the o2 sensor) or to the intake pipe before the turbocharger. Either one will pull a considerable amount of vacuum on the lines, creating a scavenging effect. It works much more effectively this way and is extremely helpful once you really start making some power.
-Isaac
Edit: If you really want to use a catch can setup, route the valve covers to a baffled catchcan. Then route the baffled catchcan to either the exhaust or the intake pipe pre-turbo to create a scavenging effect on your crank case.
thats exactly how mine is done with one addition.. my can also has a breather filter to equalize the pressure draw.. i pull more vac at idle with my agressive cams then those who are not cammed
