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i had asked once before but im about ready to install a catch can in the stock crankcase ventilation line. After installing the air intake filter and pulling air birdge off you can see a puddle on the bottom of the throttle body. Is this from the passenger side valve cover hose that runs to the throttle body or from the two rear valve cover ventilation lines that run to the intake with a pcv valve? Which one do you install catch can on or do you install it on both? I like the one on the tb it keeps pressure from building up and blowing out rear mail seal. I seen some people run two for each line but is there one with 4 ports 2 for entry from both valve cover lines and 2 for exit to the tb and back of intake in 3/8" barb fittings?
I once asked Evil-Twin about catch cans in a private message back in 2008 and he responded back to me with this
I quote: " Mike, you may not like my answer... but most of these extra added mods are someone’s cash cow, or someone’s self serving statement that what they have done or bought into is earth shaking.Truth is, we spent two years developing this car before launch in 1997... with thousands of hours of testing we also increased the benchmark in testing which formerly was 100,000 miles... every other manufacturer used the 100,000 mile testing bench mark... we tested this LS1/6 to 200,000 miles, which was unheard of... we tested the actual engine, clearances, oil spec a,d oil life monitoring system.. we did this on ever test mule with no issues.. we ran this cars full out for 800 hours, and 200,000 miles under all conditions.. when we tore these mules down, we found that all critical dimensions were still in spec.. I get Pm's and emails from lots of members with 200,000 and even some with 300,000 miles on their C5, without issues.... most of the problems with LS1/6 engines are from people running too cold of engine. using regular gas, using non certified oil, and most of all by these types of modifications... GM spent millions in the development of this car...all of these get rich quick for the developer are for the benefit of the retailer. there are some benefits to be had in tire pressure tuning, trying to keep the engine in the sweet spot.... many people think that what their grandfather did in 1960 applied to this engine, which of course it does not... lots of people on the Corvette forum want to be a hero, want to tel people that they have found a magic pill, this throttle body bypass is a typical example... it does absolutely nothing but run the risk of throttle body freeze and potential to cause a stuck open throttle.. I’ve invested 50,000 dollars in my education and GM has invested over 1 million dollars in my ongoing education. DO you really think some back yard mechanic can design and test, to test to failure studies and have the millions of dollars in test equipment that GM has given us to develop this car...
I don’t post in open forum anymore because the forum has slipped so far down the Do it yourself ladder, that I would be battling all day... I read about these guys that are running their oil at `150 degrees F for long periods of time.. running regular gas and causing engine knock.. even thought knock sensor will react. you can have the knock sensors working everyday.. I could go on and on.. the PCV valve is not worth changing... and most catch cans are the product of those using an Oiled air induction system..You cannot trust any retailer or anyone who says their product or modification has made quantum leap. The mentality found here is far from being constructive.... and its only gotten worse. getting a custom tune is a good thing if the tuner knows what he is doing, you can gain hp with mods, but run the risk of internal damage.. the front end suspension on a C5 is designed for this engine weight and not for an increase of 100 lbs of super charger and components or magnacharger, the reason this C5 is so good price wise is because it was designed to be not over engineered. This kept the cast down.. when we stared this car we had a budget and a target market . its a credit to the design engineers for making this car and the project managers for keeping it in budget.. designing a front suspension that would carry the extra weight of a super charger and inter cooler would have added weight and cost... I was personally turned down for a mod that would cost 70 cent to each C5, I Have 7 designs in every C5 on the planet, and one of them would have cost and extra 70 cents a car, but it was over our budget so I got a no... this is typical of every project of the C5 platform.. Some of the components are cheap, but thank god they are because if we made every component as good as we could very few people would be able to afford this car... I see people bitching about poor design all the time.. it just goes to show that no one knows what it takes to deliver a car within budget.
Sorry for the long winded pm
regards
Bill aka ET"
Some of the best engine builders in the business recommend catch cans (katech, rpm, blue print, cordes, etc).
I would recommend might mouse. Excellent product. Excellent results.
install depends on your year. Post a pic of your passenger engine and I can tell you
how to install. It’s very simple.
this was my catch after about 50 miles. I’m actually trying to find a new ls6 intake. I can only imagine how much oil sludge is in my intake before I installed this can.
I once asked Evil-Twin about catch cans in a private message back in 2008 and he responded back to me with this
I quote: " Mike, you may not like my answer... but most of these extra added mods are someone’s cash cow, or someone’s self serving statement that what they have done or bought into is earth shaking.Truth is, we spent two years developing this car before launch in 1997... with thousands of hours of testing we also increased the benchmark in testing which formerly was 100,000 miles... every other manufacturer used the 100,000 mile testing bench mark... we tested this LS1/6 to 200,000 miles, which was unheard of... we tested the actual engine, clearances, oil spec a,d oil life monitoring system.. we did this on ever test mule with no issues.. we ran this cars full out for 800 hours, and 200,000 miles under all conditions.. when we tore these mules down, we found that all critical dimensions were still in spec.. I get Pm's and emails from lots of members with 200,000 and even some with 300,000 miles on their C5, without issues.... most of the problems with LS1/6 engines are from people running too cold of engine. using regular gas, using non certified oil, and most of all by these types of modifications... GM spent millions in the development of this car...all of these get rich quick for the developer are for the benefit of the retailer. there are some benefits to be had in tire pressure tuning, trying to keep the engine in the sweet spot.... many people think that what their grandfather did in 1960 applied to this engine, which of course it does not... lots of people on the Corvette forum want to be a hero, want to tel people that they have found a magic pill, this throttle body bypass is a typical example... it does absolutely nothing but run the risk of throttle body freeze and potential to cause a stuck open throttle.. I’ve invested 50,000 dollars in my education and GM has invested over 1 million dollars in my ongoing education. DO you really think some back yard mechanic can design and test, to test to failure studies and have the millions of dollars in test equipment that GM has given us to develop this car...
I don’t post in open forum anymore because the forum has slipped so far down the Do it yourself ladder, that I would be battling all day... I read about these guys that are running their oil at `150 degrees F for long periods of time.. running regular gas and causing engine knock.. even thought knock sensor will react. you can have the knock sensors working everyday.. I could go on and on.. the PCV valve is not worth changing... and most catch cans are the product of those using an Oiled air induction system..You cannot trust any retailer or anyone who says their product or modification has made quantum leap. The mentality found here is far from being constructive.... and its only gotten worse. getting a custom tune is a good thing if the tuner knows what he is doing, you can gain hp with mods, but run the risk of internal damage.. the front end suspension on a C5 is designed for this engine weight and not for an increase of 100 lbs of super charger and components or magnacharger, the reason this C5 is so good price wise is because it was designed to be not over engineered. This kept the cast down.. when we stared this car we had a budget and a target market . its a credit to the design engineers for making this car and the project managers for keeping it in budget.. designing a front suspension that would carry the extra weight of a super charger and inter cooler would have added weight and cost... I was personally turned down for a mod that would cost 70 cent to each C5, I Have 7 designs in every C5 on the planet, and one of them would have cost and extra 70 cents a car, but it was over our budget so I got a no... this is typical of every project of the C5 platform.. Some of the components are cheap, but thank god they are because if we made every component as good as we could very few people would be able to afford this car... I see people bitching about poor design all the time.. it just goes to show that no one knows what it takes to deliver a car within budget.
Sorry for the long winded pm
regards
Bill aka ET"
RIP Bill
Your friend, Mike
So what are you saying a catch can in not needed is what your friend told you? It may not be i just saw the puddle on the bottom of the tb and thought it may be needed. On a forced induction engine i would think it could be used but your probably right that its not a necessity on these cars.
Some of the best engine builders in the business recommend catch cans (katech, rpm, blue print, cordes, etc).
I would recommend might mouse. Excellent product. Excellent results.
install depends on your year. Post a pic of your passenger engine and I can tell you
how to install.
Mine is a 99 corvette just like yours doesnt have the 01 or 04 valley cover vent. The crankcase lines are on the back of both valve covers and one on the passenger front. It does cluster the engine bay but yours looks nice. Does this photo help? I was thinking the 20$-30$ amazon catch cans. The amazon catch cans are similar inlet outlet port 3/8" with baffle just run the intake line to inlet port and catch can back to the intake. On amazon some people had mentioned the metal baffles or metal aluminum cans having extra metal burs that could end up getting sucked into the engine. So you leave the passenger front port to throttle body hose alone?
How much is the mighty mouse and about how many miles till it fills up? I read other reviews different cans not catching any oil.
Last edited by Justin Raney; Feb 22, 2022 at 05:03 PM.
So what are you saying a catch can in not needed is what your friend told you? It may not be i just saw the puddle on the bottom of the tb and thought it may be needed. On a forced induction engine i would think it could be used but your probably right that its not a necessity on these cars.
Bill was allegedly a C5 designer. With all due respect to Bill, he was a polarizing person on this forum. He has a lot of love for the C5 but also blatantly ignored all of the design and manufacture flaws as well as later aftermarket upgrades and improvements to an outdated platform. I take all of his recommendations with a grain of sale. RIP Bill.
Mine is a 99 corvette just like yours doesnt have the 01 or 04 valley cover vent. The crankcase lines are on the back of both valve covers and one on the passenger front. It does cluster the engine bay but yours looks nice. Does this photo help? I was thinking the 20$-30$ amazon catch cans.
hahahaha. Sorry. I’m going to need to see under that passenger engine cover. Lol.
Just the year alone doesn’t help when all of these cars are so heavily modified.
My go to Vette Mechanic agrees with Evil Twin, they are worthless.
..same here....and thank you Mike for posting that detailed insider info.....he is still trying to help from the grave....... no catch can for me...just sayin...RIP ET
So what are you saying a catch can in not needed is what your friend told you? It may not be i just saw the puddle on the bottom of the tb and thought it may be needed. On a forced induction engine i would think it could be used but your probably right that its not a necessity on these cars.
Bill was a GM engineer instrumental in the C5 generation.
Rip to Billy, but let’s not pretend that the C5 isn’t without dozens of design and manufacture flaws.
Yes it has its flaws like any car but probably less than most of the others. Like Bill stated, the engineers had to stay within a budget. The C5 was a great leap forward in engineering innovation at the time and still very relevant over 25 years later.
Bill was allegedly a C5 designer. With all due respect to Bill, he was a polarizing person on this forum. He has a lot of love for the C5 but also blatantly ignored all of the design and manufacture flaws as well as later aftermarket upgrades and improvements to an outdated platform. I take all of his recommendations with a grain of sale. RIP Bill.
I guess I was away from this forum for awhile and did not know of Bill's passing. When did this happen and do you know what did him in and his age.
I agree that he was very polarizing. After all, the C5 was his "baby". Throughout my many years of being glued to this forum, I have seen hundreds of photos of oil caught by catch cans. The idea is that if oil is allowed to freely enter the intake, carbon buildup on valves and pistons gradually increases compression, causing pinging which signals the ECU to retard timing. I'll bet after 200,000 miles, power output was down compared to an engine that was kept clean of crankcase oil through the PCV pathway. I don't recommend open breathers because of their tendency to allow oil mist to coat the engine bay. I've never had an open system, myself but read more than a few posts by those who did.
i had asked once before but im about ready to install a catch can in the stock crankcase ventilation line. After installing the air intake filter and pulling air birdge off you can see a puddle on the bottom of the throttle body. Is this from the passenger side valve cover hose that runs to the throttle body or from the two rear valve cover ventilation lines that run to the intake with a pcv valve? Which one do you install catch can on or do you install it on both? I like the one on the tb it keeps pressure from building up and blowing out rear mail seal. I seen some people run two for each line but is there one with 4 ports 2 for entry from both valve cover lines and 2 for exit to the tb and back of intake in 3/8" barb fittings?
If the pooled oil is upstream of the throttle plate (i.e. before the throttle plate), then it's oil forced there via the passenger side outlet. Normally, this is fresh air feed to the crankcase, where it mixes with crankcase gases and is pulled into the intake manifold via the PCV system. However, under high engine loads, the blowby exceeds the the vacuum pulled by the PCV system and oil vapor begins to exit via the fresh air vent. This is why companies like Elite Engineering make a clean-side oil separator - this prevents your problem from occurring. I'm using both the clean-side separator and their standard catch can, and I've yet to have oil in my intake manifold or throttle body after two years of autocrossing.
If the pooled oil is upstream of the throttle plate (i.e. before the throttle plate), then it's oil forced there via the passenger side outlet. Normally, this is fresh air feed to the crankcase, where it mixes with crankcase gases and is pulled into the intake manifold via the PCV system. However, under high engine loads, the blowby exceeds the the vacuum pulled by the PCV system and oil vapor begins to exit via the fresh air vent. This is why companies like Elite Engineering make a clean-side oil separator - this prevents your problem from occurring. I'm using both the clean-side separator and their standard catch can, and I've yet to have oil in my intake manifold or throttle body after two years of autocrossing.
So the pooled up puddle on the bottom of the throttle body is from the front passenger valve cover to throttle body short line? Would a catch can needed to be installed in that line to prevent the puddle up? Is there a reason to install 2 catch cans one for both rear valve covers to side intake port and one for the front valve cover to throttle body? Or is there a single can with 2 inlet 2 outlet 3/8" ports for this type of situation?
Dave68,I remember your research from years ago, thanks for reappearing and posting your suggestion. All I had were notes and most of the pics you posted from back then are not supported on here now. I think it's a good read for anybody considering a catch can.
So the pooled up puddle on the bottom of the throttle body is from the front passenger valve cover to throttle body short line? Would a catch can needed to be installed in that line to prevent the puddle up? Is there a reason to install 2 catch cans one for both rear valve covers to side intake port and one for the front valve cover to throttle body? Or is there a single can with 2 inlet 2 outlet 3/8" ports for this type of situation?
Correct, it’s from the passenger valve cover to throttle body line. You could run a second catch can, or buy one that has two inlets, or get a clean-side separator. Any of this options will be better than nothing. Here’s what I have:
Correct, it’s from the passenger valve cover to throttle body line. You could run a second catch can, or buy one that has two inlets, or get a clean-side separator. Any of this options will be better than nothing. Here’s what I have:
catch can
..same here....and thank you Mike for posting that detailed insider info.....he is still trying to help from the grave.......
no catch can for me...just sayin...RIP ET
