what happens when the built in PCV on the RevExtreme goes out? gotta buy a new one?
Easy to remove & replace. less than $5 bucks.
Lots of nice looking cans that are only maginally effective, so thats where the decision comes in...looks & small size or functionality. Can't have both.....and if you want something close the Mike Norris one would be the the closest to that mix IMHO.
All one has to do is look at the internal design to clearly see why.
what is the purpose for having the vent cap...still the system is supposed to be closed anf now it is open so the actual air metered in not going into the engine...it is pulling some from the vent and some from the tb, even if the amount is small, why have the vent i dont see the need...
The completely closed OEM system allows a small amount of oil (or with excess blowby ALOT) to enter the intake via the TB where it gets the filtered make-up air through reversion, so for those that want to eliminate that point of ingress you use the filtered breather. No other way to ensure oil is not entering the intake unless you ran an additional can in that line as well (which is the ideal NA set-up).
after skimming through those threads I noticed A LOT of diagrams... which makes this subject even more confusing
I understand how confusing it can be. Depending on the valve cover, valley cover, and engine type, a number of factors are evaluated to ensure the PCV system will function correctly.
Quote:
Originally Posted by Soul TKR
I don't have the ls6 conversion valley cover done... so looking at those diagrams didn't help me much. Just confused me more...
I've removed my AIR and EGR stuff...
one thing I don't wanna do, is bolt a catch can to the head covering up my nice AFR logo... I'm proud of that!
I have posted diagrams for LS1's without a valley cover PCV port. There are many diagrams because many different configurations are possible depending on the combination of parts.
Tell me where and how many ports you have and I'll post the correct diagram:
DS valve cover
PS valve cover
Throttle body
CAI
Quote:
Originally Posted by Soul TKR
I'm with ShortChevy, as to how come the "others" don't work as well as the RevExtreme or the Saikou Michi? They seem the same....????
It's the internal design of the catch can that makes all the difference. Most other cans are either empty or use some type of material as a condensing agent for carry over oil in the PCV stream.
The key to a well functioning catch can is to design it so gravity can do it's job and allow the carry over oil to drop out of suspension. If the catch can is too small, it won't allow the PCV stream to slow down enough for gravity to work. If the can relies solely on a material acting as a condensing agent for carry over oil, they saturate quickly restricting flow and don't prevent carry over oil ingestion. There is nothing wrong with using a condensing agent, just not as the primary method of extraction. These cans don't employ a dispersion tube, so the PCV stream can simply flow from one port to the other without much resistance.
The magic number is 1 meter/second. PCV flow must slow to 1 m/s or less for as long as possible. This is the point at which carry over oil will drop out of suspension from the PCV stream. A small can has real problems decreasing flow to the specified minimum for any amount of time, if at all.
Both the RevX and SM use a chambered design with a long dispersion tube. This works to semi-separate the in/out ports of the can while the dispersion tube forces the PCV stream to the bottom of the can. This allows the stream to decrease velocity so gravity can work to remove carry over oil.
Quote:
Originally Posted by Soul TKR
Also, I'm a bit confused on this valve cover breather thing... is that needed? and if I put one on there, what's to keep the oil from shooting out through that little cone filter?
TLewis4095 covered this in an earlier post.
Quote:
Originally Posted by Soul TKR
also if anyone has any better pictures of their RevExtreme or Saikou Michi catch cans... please post them up. I'm really interested in the bracket/mounting area as well. So that I can figure out if I can mount it somewhere else than the head...
You can mount them anywhere you like. The head is just a common place many use. Mine are mounted on the head, so I can't help you here.
HTH,
__________________ Aaron
'03 Electron Blue Corvette Z06
The normal stuff.....
EFI-101, EFI Advanced, EFILive-101, Variable Camshaft Tuning
EFI University Evangelist
You seem very informative and like you know what the hell your talking about. I would like to know what is wrong with some of the other catch cans on the market. I liked the Rev Extreme and almost purchased one untill I came across a thread with people that had them. Alot of them were rattling and making noise. For instance, what is wrong with the Elite catch can. It seem to have all the features of the Rev without the built in PCV valve. Everything else looks good.
ShortChevy,
I think I covered this is the previous post where the OP as the same question. If it's still not clear or you have additional questions, post up.
Quote:
Originally Posted by Pharcyde50
I'm going with the rev one. I work in bradenton so I'm just gonna stop by and pick one up tomorrow.
Pharcyde50,
Good choice.
__________________ Aaron
'03 Electron Blue Corvette Z06
The normal stuff.....
EFI-101, EFI Advanced, EFILive-101, Variable Camshaft Tuning
EFI University Evangelist
A friend of mine got this from Harbor Freight for $10..it's an Air Compressor Water/Air Seperator. I just removed the internals and attached the fittings for the Hoses to put it on the Car. It has 1/4" NPT Threads so that helps greatly. This one is bolting to the passenger's side Head, inline on the Vacumm Tube from the Valve Cover to the Intake. I have another one to put on the driver's side inline from the PCV Valve to the Intake. The clear part unscrews to empty it.
There was a guy on the other page that had something similar..I don't have EGR so I'm making a bracket to attach it to the Head.
I understand how confusing it can be. Depending on the valve cover, valley cover, and engine type, a number of factors are evaluated to ensure the PCV system will function correctly.
I have posted diagrams for LS1's without a valley cover PCV port. There are many diagrams because many different configurations are possible depending on the combination of parts.
Tell me where and how many ports you have and I'll post the correct diagram:
DS valve cover
PS valve cover
Throttle body
CAI
It's the internal design of the catch can that makes all the difference. Most other cans are either empty or use some type of material as a condensing agent for carry over oil in the PCV stream.
The key to a well functioning catch can is to design it so gravity can do it's job and allow the carry over oil to drop out of suspension. If the catch can is too small, it won't allow the PCV stream to slow down enough for gravity to work. If the can relies solely on a material acting as a condensing agent for carry over oil, they saturate quickly restricting flow and don't prevent carry over oil ingestion. There is nothing wrong with using a condensing agent, just not as the primary method of extraction. These cans don't employ a dispersion tube, so the PCV stream can simply flow from one port to the other without much resistance.
The magic number is 1 meter/second. PCV flow must slow to 1 m/s or less for as long as possible. This is the point at which carry over oil will drop out of suspension from the PCV stream. A small can has real problems decreasing flow to the specified minimum for any amount of time, if at all.
Both the RevX and SM use a chambered design with a long dispersion tube. This works to semi-separate the in/out ports of the can while the dispersion tube forces the PCV stream to the bottom of the can. This allows the stream to decrease velocity so gravity can work to remove carry over oil.
TLewis4095 covered this in an earlier post.
You can mount them anywhere you like. The head is just a common place many use. Mine are mounted on the head, so I can't help you here.
HTH,
Thanks man, you answered many of my questions!
I'll take an engine bay photo of my current setup, so that you may understand the plumbing of my particular PCV routing...
question? i have open breather filters in my valve covers in both sides is that bad to do? or will that work. I tried to follow what yall have said as much as i can but that alot of stuff lol..
It's a bit large I guess . . But i'll take functionality over looks anyday. Personally I like a clean engine bay and the looks/size of my REV can is fine. Keeping oil out of the intake is like a magic trick with these motors.
__________________ , Factory LS2 (364) crank, rods, pistons, N/A , A.S. 5.3 heads, LG G5X4 camshaft, FAST 90/90, Performabuilt level 3 4L60E, ARH 1 7/8's, Circle D 230mm converter, full lineup of Spohn hardware out back -- P.B.= 9.87@134.8 - 60'= 1.30 10/19/09
Speed Density Tuned by Kaltech tuning on Long Island www.kaltechtuning.com
Did this with a GM head and pump gas!
It's a bit large I guess . . But i'll take functionality over looks anyday. Personally I like a clean engine bay and the looks/size of my REV can is fine. Keeping oil out of the intake is like a magic trick with these motors.
yeah just bypass the PVC and throw catch can on with a vent and call it a day...
__________________ 02 z28 A4 Stock Internal with SS3600 11.558 at 116.24 MPH 1.546 60ft DA -832 11/25/07 Cam Only and SS4000 10.617 at 124.66MPH 1.356 DA -870ft Race weight 3250lbs
ram air info with ac http://www.ls1tech.com/forums/genera...r-install.html
without ac see post 5, pm me if you need one
, Factory LS2 (364) crank, rods, pistons, N/A , A.S. 5.3 heads, LG G5X4 camshaft, FAST 90/90, Performabuilt level 3 4L60E, ARH 1 7/8's, Circle D 230mm converter, full lineup of Spohn hardware out back -- P.B.= 9.87@134.8 - 60'= 1.30 10/19/09
