Oil Consumption LS2 427
06-24-2009, 03:12 PM
#61
I don't think that's a fair analogy. First of all, that era's cars weren't needing a rebuild or replaced engine due to contaminated oil. I don't believe there have ever been many combustion contaminated oil failures at any time. I do believe that the reason for early rebuilds of those era's cars was due to lower quality parts which wore out. Today's engines use parts which last far longer and make the engine more efficient and produce much less contaminants. Better sealing top rings, hypereutetic pistons with tight bore to piston clearances, and most of all, better fuel and spark control via electronics Vs. carbs and point ignition. Our cars use less fuel to produce more horsepower and less emissions and contaminants.
If you can get an LS series engine to pass a sniffer test without cats (you can, I've seen it done) then surely it isn't producing enough contaminants getting past the rings and pistons to ruin an engine when the oil is changed at reduced intervals.
If you can get an LS series engine to pass a sniffer test without cats (you can, I've seen it done) then surely it isn't producing enough contaminants getting past the rings and pistons to ruin an engine when the oil is changed at reduced intervals.
There are so many things that can go wrong that affects an oils ability to protect an engine, it's mind boggling. Start an oil analysis regimen and then see if you still believe what you wrote above.
Last edited by 405HP_Z06; 06-24-2009 at 08:56 PM.
06-24-2009, 06:08 PM
#62
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could an authority throw together a diagram for a LS7 drysump set up? I do not want to be in the position of changing the synthetic oil in 3 gallon lots every time I run the car at the track!
TIA.
Tom
TIA.
Tom
06-25-2009, 07:28 AM
#65
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Aaron,
thanks for the diagram -
looks like the main differences between that set up and mine are -
1) I don't have the catch can between valley cover and intake manifold
2) the breather line off the oil tank connects to an ARE catch can w/ a breather. There's no pvc valve in the connection, don't know what's inside the breather can.
I assume the rev extreme catch can will prevent oil from accumulating in the manifold.
Thanks again.
Tom
thanks for the diagram -
looks like the main differences between that set up and mine are -
1) I don't have the catch can between valley cover and intake manifold
2) the breather line off the oil tank connects to an ARE catch can w/ a breather. There's no pvc valve in the connection, don't know what's inside the breather can.
I assume the rev extreme catch can will prevent oil from accumulating in the manifold.
Thanks again.
Tom
06-25-2009, 08:32 AM
#67
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So for myself do I do away with the PCV valve. or does it still get used some where in the plumbing? I checked last night(sorry no pics) but I do NOT have anything going in the back of my intake. Driver VC goes to intake pass front VC goes to Tb the rear pass VC is tied into the driver VC and the vally cover is capped off.
06-25-2009, 09:32 AM
#68
Aaron,
thanks for the diagram -
looks like the main differences between that set up and mine are -
1) I don't have the catch can between valley cover and intake manifold
2) the breather line off the oil tank connects to an ARE catch can w/ a breather. There's no pvc valve in the connection, don't know what's inside the breather can.
I assume the rev extreme catch can will prevent oil from accumulating in the manifold.
Thanks again.
Tom
thanks for the diagram -
looks like the main differences between that set up and mine are -
1) I don't have the catch can between valley cover and intake manifold
2) the breather line off the oil tank connects to an ARE catch can w/ a breather. There's no pvc valve in the connection, don't know what's inside the breather can.
I assume the rev extreme catch can will prevent oil from accumulating in the manifold.
Thanks again.
Tom
On the clean side, keep your ARE breather can and put a one-way check valve between the can and the oil tank.
Insert a catch can on the dirty side for optimal carry over oil removal from the PCV stream.
06-25-2009, 09:53 AM
#69
I don't recommend Saikou Michi and RevXtreme cans because they are cosmetically appealing or the lowest price can, but rather because they are designed correctly and highly functional.
The RevXtreme differentiator is the internal design. They did, and continue to do, their homework when they designed their catch can. They are also continually improving and optimizing the desgin based on real data.
One of the biggest issues with the LS fixed orifice system is the size of the orifice. 2.5mm is too small and does not allow proper PCV flow within the system. At the minimum, it would be better to remove the orifice and install an 'old school' variable orifice valve.
On the LS7, clean side reversion is a big issue and the reason I'm a huge fan of dual cans (on any application). The oil tank will produce a large amount of fumes due to oil aeration. A better oil tank would probably help the issue, but you may not want to go that far. A clean side can is a band aid for this problem. If you fix the dirty side you may still have issues on the clean side due to reversion.
My current project is modifying a factory valley cover by removing the orifice while still retaining the oil separation chamber and enlarging the passages for increased flow. I would like to see a -10AN off the valley cover.
Last edited by 405HP_Z06; 06-26-2009 at 12:47 AM.
06-25-2009, 10:00 AM
#70
So for myself do I do away with the PCV valve. or does it still get used some where in the plumbing? I checked last night(sorry no pics) but I do NOT have anything going in the back of my intake. Driver VC goes to intake pass front VC goes to Tb the rear pass VC is tied into the driver VC and the vally cover is capped off.
06-25-2009, 11:31 AM
#71
I've been talking with RevX (Tracy) and I am going to stock the RevX can.
(BTW, I was not so incorrect with how I explained how the system was supposed to work but the reality of it different. The clean air vent is not supposed to allow reversion.) 03 and previous, I really havent studied the 04 and above system. Since this has always been an issue I routed things my own way. I also have a small electric pump for vacuum that I will employ. I fought oil in the intake for far far to lo long with a decent catch can that traped a good amount of oil all the time but I could never get rid of the oil in the intake. I could swear that vent tube was sucking oil !
I wonder if all you need to do is move the location of the vent from in from of the Tb blade so it does not have air rushing by into a location where it would not be effected by this? Anyone tried this?
So the 04 and above has a restrictor in the valley pan and is meant to breath in both directions is what your saying?
(BTW, I was not so incorrect with how I explained how the system was supposed to work but the reality of it different. The clean air vent is not supposed to allow reversion.) 03 and previous, I really havent studied the 04 and above system. Since this has always been an issue I routed things my own way. I also have a small electric pump for vacuum that I will employ. I fought oil in the intake for far far to lo long with a decent catch can that traped a good amount of oil all the time but I could never get rid of the oil in the intake. I could swear that vent tube was sucking oil !
I wonder if all you need to do is move the location of the vent from in from of the Tb blade so it does not have air rushing by into a location where it would not be effected by this? Anyone tried this?
So the 04 and above has a restrictor in the valley pan and is meant to breath in both directions is what your saying?
06-25-2009, 11:45 AM
#72
I've been talking with RevX (Tracy) and I am going to stock the RevX can.
(BTW, I was not so incorrect with how I explained how the system was supposed to work but the reality of it different. The clean air vent is not supposed to allow reversion.) 03 and previous, I really havent studied the 04 and above system. <snip>
(BTW, I was not so incorrect with how I explained how the system was supposed to work but the reality of it different. The clean air vent is not supposed to allow reversion.) 03 and previous, I really havent studied the 04 and above system. <snip>
<snip>Since this has always been an issue I routed things my own way. I also have a small electric pump for vacuum that I will employ. I fought oil in the intake for far far to lo long with a decent catch can that traped a good amount of oil all the time but I could never get rid of the oil in the intake. I could swear that vent tube was sucking oil !
I wonder if all you need to do is move the location of the vent from in from of the Tb blade so it does not have air rushing by into a location where it would not be effected by this? Anyone tried this?
So the 04 and above has a restrictor in the valley pan and is meant to breath in both directions is what your saying?
So the 04 and above has a restrictor in the valley pan and is meant to breath in both directions is what your saying?
Last edited by 405HP_Z06; 06-25-2009 at 12:04 PM.
06-25-2009, 04:20 PM
#75
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I'm going to go with the dual can set up from Saikou which is better for instal that stage 1 or Evolvd? and how do I purchase nothing on web page to order or even a # to call. If I follow the diagram it's as simple as that? What about mounting the cans? Also any does or don't when doing the instal?
06-25-2009, 06:17 PM
#76
Im I'm going to go with the dual can set up from Saikou which is better for instal that stage 1 or Evolvd? and how do I purchase nothing on web page to order or even a # to call. If I follow the diagram it's as simple as that? What about mounting the cans? Also any does or don't when doing the instal?
I'm going to go with the dual can set up from Saikou which is better for instal that stage 1 or Evolvd? and how do I purchase nothing on web page to order or even a # to call. If I follow the diagram it's as simple as that? What about mounting the cans? Also any does or don't when doing the instal?