Here is the problem... When Troy owned this forum, it was created out of Corvette Passion, This forum is now a commercial enterprise. Nothing wrong with that other than the fact that vendors pay the bills. Vendors make this forum work.. But my allegiance has always been with the membership. I have however defended Vendors, and members in different issues. WE have some of the greatest vendors in this forum for sure. But for most members here, they can be lead blindly buy other members who do not have a clue about this motor, or the 5th generation of Corvette, in general. IM just trying to answer specific questions " Do I need a catch can ".. I could not in my heart , say yes.. I would not want my son or daughter to spend 160 dollars for nothing or because Joe blow said so, or Corvette jones has one. If Vendors can get the hype going on a product, it would help them put their kids through college. The Catch cans are pretty, and they create a psychosomatic high . It seems logical that removing oil vapor from the car will somehow make a 400K mileage car go 500K. Some people respect my opinion, and obviously some don't... But if IM here, and someone asks for it, IM going to give it, not force it down anyone's throat. It up to them to decide if my opinion is worth anything. IM not sure why anyone would quote me and my opinion, and call it ignorant. Actually I do know why.. but I wont say... actually IM not dumb as I look.
Bill aka ET

 

I'd take your opinion over that ignorant thing any day. Thanks again for your input. You have helped me in the past. Always helpful and never give any ignorant opinions.

 

I remember a vendor some time ago pushing an after market starter as a necessary thing, stating his gear reduction starter was necessary for dependability and sure starts. I questioned if he knew the stock starters were ALSO gear reduction and he claimed his Z06 came with a straight drive starter, total, clueless BS.
I have a stock PMGR starter on the 565 in my Cole drag boat and it spins the BBC like the plugs are out.

PMGR stands for permanent magnet gear reduction, and my 99 crew cab dually also has the same starter, stock.

While a catch can for the PCV system MAY be of some benefit, an after market starter will provide ZERO benefits to the purchaser.

 

Bill, I always zone in on your comments and suggestions. It's quite evident that your contribution is always very helpful and to the point. My vote is keep up the good work, there are a lot of us listening!!!

 

Thanks sea5like, I hear your voice everyday in private message from members saying the same thing. I've received literally thousands of thank you's from people not willing to post in open forum. My profile page is also full of them.
Like I said, I know why some people post these irreverent comments. But to offer it up would only serve as petty. These few distractors are in the very small minority, and it has something to do with their own personal low self esteem.
Thanks again
Bill aka ET

 

It's funny when someone asks for an opinion then bashes the one(or someone else) giving a opinion ??????? To me it's kinda easy read the posts take what you want leave the rest and go on your way !!!!!!!

 

ill make this really easy for everyone. lol stick your hand in manifold...if its coated in oil, you need (want) one.

that stock plumbing that goes from the valley to the manifold was idotic. The motor may run for 5000000000000 miles, but that doesn't mean it cant run better or more efficient.

 

boosted motors usually vent theirs to the atmosphere. NA cars can keep the system closed. If its closed there is zero reason NOT to have one. This isn't blow by, its crank case pressure.

 

Burning all that oil vapor instead of collecting it creates more carbon deposits on the pistons and valves. This lessens the ability of the exhaust valves to exchange heat and remain cool. Also carbon deposits on the pistons and in the combustion chamber can increase risk of detonation. Also not all the vapor actually makes it through the intake to be combusted. It collects and pools in your intake collecting grime. I seriously doubt it has any contributing factor to the longevity of a stock engine that is not raced, but would certainly help keep it from losing power as it ages over 100k as well as provide better protection in a modified setup.

In the grand scheme of things, in a naturally aspirated engine designed for 100k miles, a catch can is an absolute waste of time, and would have upped production costs by millions. Engineering isn't all about making the best product possible, but the best product possible at a given price that's only supposed to last for a given amount of time. That means if something is not necessary to get the engine past 100k miles and doesn't increase power, it's probably not gonna be on there.

This is especially true when cutting costs to make a corvette as affordable as it is compared to other cars with similar performance. Just look at the harmonic balancer for example. I guarantee you will not find one less than 5 years and 100k miles that has separated. This isn't bad engineering. It's engineering within the manufacturing constraints. If you don't like it, don't buy old cars that are outside their warranty period. You will find these kind of things on just about every single car.

If the c5 had all the bells and whistles that everyone on this forum says it should have had, half of us probably wouldn't be driving one due to the cost.

Personally, I don't have a catch can. I plan on installing one eventually especially since I just had my heads and intake off over the winter and cleaned everything up all nicely.

 

good to see that there are a few out there that still grasp the concept... and wow, leave it to you know who to take a technical thread and turn it into one promoting himself and his rhetoric opinions

 

For what it's worth, I have a 50k mile LS1, bone stock. I had a catch can for maybe 5k of that a long while ago, but I needed to remove it for visual and I'm too lazy to put it back. I recently took the intake off for changing the oil pressure sender, and I checked the valves at the same time. I have rarely seen as clean intake valves, they're like polished. There was a spoonful of oil in the can when I took it off. There was virtually no oil in the manifold.

So that's one data point with one engine.

 

or it's a guy who spent years with the development of one of the best engines ever made and has pride in the fact he had a hand in it, and it was his opinion that you don't need it !!!!!!

 

It's not the intake valves that get the carbon buildup. It's the exhaust valves where the burnt oil escapes through and leaves deposits. After taking out my exhaust valves at 135k, they were pitted pretty good and definitely needed a lap. They were also caked in carbon deposits. Never used an oil catch can either though. Results on the exhaust valves may have been slightly better if a catch can had been used the life of the engine.

 

Like I said, I wont argue the point but the LS1motor was designed specifically to bench mark a 200,000 mile engine design, the first in the world. NOT 100K like one of these know it all seems to think and posted in this thread. Most live in the distant past learning automotive technology from their grandfather who worked at a Texaco station back in the 60's. This 200k watermark was the mandate of Dave Hill and also the inspiration for the newly designed Oil Life monitor system which I was intimate in tis design capabilities... also we made that OLM system so good, we set the algorithmic stream base line from 10,000 miles to 15,000 miles in the year 2000, it was that good. 100K miles was the bench mark from 1980 to 1996, prior to that automotive engine design was benchmarked at 60,000 miles..
Haters will always hate... no doubt about that, but you have to ask yourself how many hours these wanna be automotive engineers all spent in the Corvette design studio.
millions of dollars spent on research and development of the C7 Z07 and still no catch can...after 63 years. Do you really think a 15 dollar ( cost to manufacture oil catch can ) would be removed from the design if it was necessary? Silly arguments from very clueless people. These cars can go 400K .. but in the hands of these pseudo engineers, their cars seem to have issues. AS I say to many people who PM me, I am NOT a tuner. I don't give tips on re engineering. Everything GM does is backed by many hours of test to fail and also non destructive testing. Is the car perfect, Hell no ! but if it was. most people here could not afford it. Dave wanted reliability and integrity built in. If a catch can added anything necessary to the design it would be there. The high water mark for the budget was in the drive train...Dave made sure of that, its also the reason why the seats, the sound system etc are not top notch. The other consideration is weight. Any Revision ( Rev.) to an existing design had to have a measure of reducing weight, and still stay within the budget or it was not accepted. I have so much insider information on the development of this car that these haters, are just plain clueless.
Lastly, as I've said many times, be very careful who you listen too on this forum.
Bill aka ET

 

to bad they didn't do all that testing on the ls7

 

We all have opinions, my solution/advice when questions like this arise is to educate oneself and draw your own conclusion. This is not meant to be rude, arrogant or any of the such...nor am I am expert in anything so my 2 cents may mean nothing to anyone...so I googled PCV system and if you understand what it is, why it is there, you can then determine if you "need" a device to defeat the system. BTW I do have a CC, its the best of both worlds in my opinion, no oil in the intake and the harmful gases are not vented to the atmosphere,environmentally conscious people rejoice and people like me that hate emissions equipment can be satisfied, even if it is a placebo.

Google is your friend, knowledge is power, the invention of the system is quite intriguing if you ask me...born from necessity, then like many other things, the man decided it was needed on consumer vehicles...progress!

With that said, PCV systems have been around since the 60s, so no you do not NEED one to operate your vehicle as the factory intended.



This was quite humorous as well, to those who know of the great valve drop debate...or shall we call it...valvegate? I kid...

 

I said it once already in this thread and ill say it again. A stock cubed or modded C5 does not need a catch can. It wont hurt the car if one choses to run one. Those of us who have gone outside of those parameters, (bigger cubes, boosted) require it. Also just thought id post this here for some even more interesting reading as the C7Z guys aren't liking what they are finding.....

https://www.corvetteforum.com/forums...ver-today.html

 

I removed my intake manifold to replace the oil pressure sensor. I was shocked how much oil was inside my intake manifold. I soaked it with brake cleaner to get all the oil out. Having an oil coated intake manifold is not what I want so I spent $43 and installed a oil catch can. It is small and collects oil fast. I unscrew the can and pour it in the motor. 2004 LS6. To each his own like most are saying.

 

Yep 15.00 was too much to spend. You even attested they wouldn't do one of your recommendations because of a $0.49 cost.

As usual you cannot comment with trying to denegrate others.

 

I guess Evil-Twin doesn't remember GM replacing oil rings in manual c5s because of their low tension this sucking up oil on deceleration.