Header evac systems definitely work! On my Olds 455 street/strip combo the system, at 1100rpm idle, pulls so much vacuum that I can pull a valve cover breather connected to just one side via 5/8 hose will stick to your hand on the plug into grommet breather side and you haven't to wiggle and turn sideways said breather to get it lose from the palm of your hand. I never measured the actual vacuum but for sure it's present and it's more than just a little bit. Yes these systems will put smoke out the exhaust pipes, depending on how well the valve cover is baffled, so that is one downside. As far as helping the rings seat on a 13:1 compression 620hp n/a motor...? Let's just say YES...ring seal is considerably better with that low pressure/vacuum in the crankcase!
I'm a mechanic myself. Both Diesel and Gasoline engines. I wonder why this man doesn't get more views and subscribers. I live in Iran, and I paid dearly to learn all these stuff. Going through inefficient classes, working for bullies half my size, and at the end, getting tired and teaching myself. I think people just don't appreciate a top-notch knowledge when it's given for free. I studied Clinical Psychology and one of our professors always said: Never consult people for free because if they don't pay you they won't appreciate your help...
I will continue to do so to the best of my abilities too! 😁 this channel is to help anyone who finds this info helpful, especially for all the "New Guy's". Taking complicated things and making them so even I can understand it 😅😂
@@newguysgarage6802 great video what about turbo cars I’m having crankcase pressure issues I have a video on my channel and some people are saying I should be worried about My crankcase ventilation catch can I’m gapped 26 upper ring and 25 bottom ring for boost, would this work on my 3 inch down pipe
Excellent. What Ive learned here has expanded my knowledge. I need to demand a raise now that I’m bringing more to the table. I’m putting you down as a contact on my resume.
A lot going on in there. The carburetor's carbin', the crankshaft's crankin', and the pistons .... well, their workin' too! Great vid and very informative as well. Thanks!!!
The old school v8's would have a PCV valve on one valve cover going to the intake manifold, and another vent on the other valve cover with a hose going into the air filter housing. The air filter housing had a foam filter on the hose inlet to prevent oil from gunking the carburetor. Thus both valve covers were vented. I preferred to simply run valve cover breathers on both sides venting to fresh air, however if your windows were open you would end up catching a fair bit of exhaust odor coming from the engine compartment.
Will definetely do it this way oned day Most efficient way to vent the crankcase! Nitro loves windage to cushion the harmonics haha. They work in a world of their own.
Nitromethane is backwards from machanical Commonsense lol 😆 The more resistance the more power you make! Because unlike gasoline and ethanol fuels it is not handicapped by burn duration lol
Ive been looking all over for one of these because im trying to water proof my 350 in my truck without useing a pcv or catch can and have the snorkel but just breathers on top of valve covers yeah I kno im not building a submarine but want the best i can get and because its a 73 its emmision exempt lol awesome video
Dude that's sweet I never even considered that kind of the use for it but it makes total sense LOL. I just got this one online just ebay is where I find most of this random stuff.😃
@@newguysgarage6802 , I can believe it. I have had to redo an intro or certain segment of video so many times in the past because I can’t talk correctly. 😂😂
Every video man every video 😂 Either that or ill have 40% of the video be what I actually want to say and the other 60% be "right, you know, ahh, well I mean" lol 🤣
My son's early 65 mustang had a draft tube that comes off the back of the intake and drops down past the exhaust and just dumps into open air. Ford could have added the nipple to the right bank exhaust pipe and made this system easily.
what’s your take on the classic old “302 500 hp block split”? what’s some things you’re going to do to prevent that from happening on that engine in the video? i’m trying to build up a 302 for my truck and the block split issue is the one thing that’s concerning me about it
It’s a very real thing. Look up David Vizards video on how to make the 302 last. In the past I’ve used main studs/girdles and filled the block personally.
Darryl Smith is right, Definitely using a stud girdle but honestly that is about it for me. Lots of people run them up over 500hp without issues, some people have them split. So im just going to take it as it comes lol 😆
ahh gotcha. will definitely be watching vizard’s video on that lol. i would just wing it and see what happens but that’s a lot of money to risk if it all goes wrong 😂
Im going to say the blue man group probably could, and no that oil slick was just from the factory on those cars 🤣 You have no idea how many times I switched pcv with pvc trying to make this video 😂
Let's say you have a centrifugal supercharged setup. What if I setup an oil catch can coming off the intake manifold going into the intake pipe of the supercharger. That way ur using the supercharger to pull crankcase pressure out
I see where your going with this. Lets simplify it even further though because really would that not just be a normal pcv system? It couldn't come off the intake it would have to come off a valve cover to evacuate from the crankcase, so that would be no different then if you just had a normal pcv system in place. Problem is then instead of evacuating pressure from the crankcase you would be (attempting, check valve would stop it) to send boost into the crankcase. Because the reason the pcv is able to pull gasses out of the crankcase is because there is manifold vaccum, in a supercharged application there is not vaccum but boost pressure. Now you could hook it to ported vacuum I suppose 🤔 that should still be vaccum even under boost...... hmmmmm.... could you have two pcv valves hooked to ported vacuum in a supercharged application without it making the engine run crappy....I'm not sure that is a good question 😂😁😃
@@newguysgarage6802 well in the modern hemi applications, there's no breathers coming off valve covers, the PCV ports are integrated into the intake manifold. Also the PCV hose would be connected to the inlet side of the supercharger, which is constantly sucking in air.
@@newguysgarage6802 yes exactly. Basically using the supercharger a vacuum pump. I can't find any examples of guys doing this on TH-cam. But it makes a lot of sense to me
Ahh ya they must have a passage to the crankcase through the intake then i see. But theoretically it could work...might have to worry about oil getting sucked up and thrown through the supercharger but that should be that big of an issue. But i guess the real question is, whatever air that is going in is the same air that is getting thrown out so really the bung in the exhaust tube would be just as effective as this theoretically possible solution would it not 🤔 Only then you wouldn't be feeding dirty air through the motor if its hooked to the exhaust. 😅
Yes will help with supercharged engines too, if roots or centrifugal supercharger its the same. For a turbo application however im not sure how or were you would want to put it......after the turbo mabey 🤔
After turbo won't have enough scavenge effect to draw a negative pressure (vacuum) from the crankcase. Ahead of the turbo will play havoc with spooling the turbine...so no, don't really work with turbos
Hello o just did it on my 327 and the question is do i need a breather on the engine ? Like the old intakes? I have the airgap and now Both sides of the valve covers go to the headders so i dont know if i got it right thanks
Super high compression motors at full throttle would blow oil out on the track. This was developed to stop that. Some one is always making up crap to explain something.
No. Very high compression engines do make a lot of blowby, but not enough to oil the track unless it's so worn out the engine itself becomes an oil pump out the exhaust. The scavenge effect from the header collector does in fact create a significant amount of negative pressure, or vacuum to pull from the crankcase, therefore removing any blowby and also helping the rings to seat because of the vacuum below the rings. The system increases power significantly on high compression high horsepower applications. Don't know what you are going on about, but the system DEFINITELY works. And I can prove it with my own setup
Ok, that is what the car wants you to believe, but in fact, that is a Crack pipe for the engine... Its why it finds your inputs more interesting and seemingly has more power/responds better with it... Just ask any cra(n)ck-case and you will get a honest answer... Machinery likes to hide its vices, but not junkies... :P p.s. all jokes aside, that is a brilliant system, but quite severely incompatible with modern cars... All the nonsense added onto the exhaust that does not like oil and shit like that... The catalyst, the dpf in case of a diesel and such systems dont really fare too well with oil contamination... I dont hate those, dont get me wrong, i love the catalyst and dpf on diesels, for they really do make the car much less offensive to the nose, but they force you to place this weld pipe much further down the exhaust, after both the turbo(90%of modern cars) and the filters like the cat and dpf, which can place it over a full meter(over 3 feet) away, making you rely on much longer hoses to connect to the covers... And longer hose reduces pressure by itself, or negative pressure, rendering the system less efficient(even less so, as its much further away from the manifold, where the venturi effect would be the strongest) and at risk of catching fire if not well assembled to make sure your hose cant touch the hot exhaust in the first 3 feet after the manifold... Sure, there are solutions to it, but this is really a cherry atop the cake for essentially pre 1970`s or even pre `60`s cars with their much less complicated systems... Which i know the channel is all about, but i cant help myself from lamenting the apparent flaws of complexity with modern cars... By modern, i mean from 1990s to 2012... 2012 and after arent cars anymore, its just overpriced junk designed to fall apart in less than a decade... Looks amazing and drives amazing, but its junk...
Excellent. What Ive learned here has expanded my knowledge. I need to demand a raise now that I’m bringing more to the table. I’m putting you down as a contact on my resume.
![[Full Episode] MasterChef Junior Thailand มาสเตอร์เชฟ จูเนียร์ ประเทศไทย Season 3 Episode 4](http://i.ytimg.com/vi/e7Oqqo90x_w/mqdefault.jpg)
Header evac systems definitely work! On my Olds 455 street/strip combo the system, at 1100rpm idle, pulls so much vacuum that I can pull a valve cover breather connected to just one side via 5/8 hose will stick to your hand on the plug into grommet breather side and you haven't to wiggle and turn sideways said breather to get it lose from the palm of your hand.
I never measured the actual vacuum but for sure it's present and it's more than just a little bit.
Yes these systems will put smoke out the exhaust pipes, depending on how well the valve cover is baffled, so that is one downside. As far as helping the rings seat on a 13:1 compression 620hp n/a motor...? Let's just say YES...ring seal is considerably better with that low pressure/vacuum in the crankcase!
Old school stuff! Works really good 😁👍
I'm a mechanic myself. Both Diesel and Gasoline engines. I wonder why this man doesn't get more views and subscribers. I live in Iran, and I paid dearly to learn all these stuff. Going through inefficient classes, working for bullies half my size, and at the end, getting tired and teaching myself. I think people just don't appreciate a top-notch knowledge when it's given for free. I studied Clinical Psychology and one of our professors always said: Never consult people for free because if they don't pay you they won't appreciate your help...
I appreciate the kind words! 😃
Thank you verry much 🙂
@New Guys Garage your welcome. Actually, I appreciate the high-quality content provided for free. Because I understand its value.
I will continue to do so to the best of my abilities too! 😁
this channel is to help anyone who finds this info helpful, especially for all the "New Guy's".
Taking complicated things and making them so even I can understand it 😅😂
@@newguysgarage6802 great video what about turbo cars I’m having crankcase pressure issues I have a video on my channel and some people are saying I should be worried about My crankcase ventilation catch can I’m gapped 26 upper ring and 25 bottom ring for boost, would this work on my 3 inch down pipe
Excellent. What Ive learned here has expanded my knowledge. I need to demand a raise now that I’m bringing more to the table. I’m putting you down as a contact on my resume.
Lol 🤣 👍
I know a lot of the old school tricks, but I actually haven't seen this one before! Definitely makes sense.
Learn something new everyday they say 😂👌
A lot going on in there. The carburetor's carbin', the crankshaft's crankin', and the pistons .... well, their workin' too!
Great vid and very informative as well. Thanks!!!
Certainly is a lot happening in there 😂
Thank you for watching! 😃
Not only does it give that little bit extra power, I bet it helps keep it all clean inside too.
Great breakdown 👍🏾👍🏾👍🏾
Thank you 😁
Loved this bro!!
Thank you for watching 😁
I appreciate it! 🙂
I have that Mr Gasket kit, never been used, bought it from Giant Auto about 25-30 years ago
Nice!
I still have to get one for this engine here, one part at a time lol 😁👌
Good stuff 👍
The old school v8's would have a PCV valve on one valve cover going to the intake manifold, and another vent on the other valve cover with a hose going into the air filter housing. The air filter housing had a foam filter on the hose inlet to prevent oil from gunking the carburetor. Thus both valve covers were vented. I preferred to simply run valve cover breathers on both sides venting to fresh air, however if your windows were open you would end up catching a fair bit of exhaust odor coming from the engine compartment.
Will definetely do it this way oned day
Most efficient way to vent the crankcase!
Nitro loves windage to cushion the harmonics haha. They work in a world of their own.
Nitromethane is backwards from machanical Commonsense lol 😆
The more resistance the more power you make!
Because unlike gasoline and ethanol fuels it is not handicapped by burn duration lol
Ive been looking all over for one of these because im trying to water proof my 350 in my truck without useing a pcv or catch can and have the snorkel but just breathers on top of valve covers yeah I kno im not building a submarine but want the best i can get and because its a 73 its emmision exempt lol awesome video
Dude that's sweet I never even considered that kind of the use for it but it makes total sense LOL. I just got this one online just ebay is where I find most of this random stuff.😃
"Recipicating...Recipenticate...reciprocate...Moving up and Down!"😂😂🤣
Love the info. I really had no idea about this. 🤘
Lol 🤣
You dont want to know how many times I accidentally said pvc instead of pcv trying to make this video 😂
@@newguysgarage6802 , I can believe it. I have had to redo an intro or certain segment of video so many times in the past because I can’t talk correctly. 😂😂
Every video man every video 😂
Either that or ill have 40% of the video be what I actually want to say and the other 60% be "right, you know, ahh, well I mean" lol 🤣
@@newguysgarage6802 EXACTLY!!! 😂😂
I use it in all my mud bog trucks
Have you seen BoogieTech channel? He talks about these and proves the power adding on a dyno.
Haven't seen him, I'll have to look him up! 😁
You could run a pcv on one side and a crankcase evacuation on the other side.
I mean....sure you could....But what would that accomplish? 🤔
My son's early 65 mustang had a draft tube that comes off the back of the intake and drops down past the exhaust and just dumps into open air. Ford could have added the nipple to the right bank exhaust pipe and made this system easily.
True! 😂👌
Ok, so which of these two systems is the better option allows you to gain better horsepower?
You talking about vaccum pump vs evac system on header?
@@newguysgarage6802 evac system vs stock Subaru PCV system.
what’s your take on the classic old “302 500 hp block split”? what’s some things you’re going to do to prevent that from happening on that engine in the video? i’m trying to build up a 302 for my truck and the block split issue is the one thing that’s concerning me about it
It’s a very real thing. Look up David Vizards video on how to make the 302 last. In the past I’ve used main studs/girdles and filled the block personally.
Darryl Smith is right,
Definitely using a stud girdle but honestly that is about it for me.
Lots of people run them up over 500hp without issues, some people have them split.
So im just going to take it as it comes lol 😆
ahh gotcha. will definitely be watching vizard’s video on that lol. i would just wing it and see what happens but that’s a lot of money to risk if it all goes wrong 😂
93Jake
That it is! Lol
@@newguysgarage6802 yeah just watched his video and i’m definitely gonna go with the DSS stud girdle
You sound like norm McDonald trying to imitate the vice grip garage
Who?
But can you make a PCV out of PVC? Also is this how they made the oil slick getaway devise in the James Bond movie cars?
Im going to say the blue man group probably could, and no that oil slick was just from the factory on those cars 🤣
You have no idea how many times I switched pcv with pvc trying to make this video 😂
Let's say you have a centrifugal supercharged setup. What if I setup an oil catch can coming off the intake manifold going into the intake pipe of the supercharger. That way ur using the supercharger to pull crankcase pressure out
I see where your going with this. Lets simplify it even further though because really would that not just be a normal pcv system?
It couldn't come off the intake it would have to come off a valve cover to evacuate from the crankcase, so that would be no different then if you just had a normal pcv system in place.
Problem is then instead of evacuating pressure from the crankcase you would be (attempting, check valve would stop it) to send boost into the crankcase.
Because the reason the pcv is able to pull gasses out of the crankcase is because there is manifold vaccum, in a supercharged application there is not vaccum but boost pressure.
Now you could hook it to ported vacuum I suppose 🤔 that should still be vaccum even under boost...... hmmmmm.... could you have two pcv valves hooked to ported vacuum in a supercharged application without it making the engine run crappy....I'm not sure that is a good question 😂😁😃
Oh im thinking roots style though!
For centrifugal you would have to have it hooked before the superchargers inlet for vaccum
@@newguysgarage6802 well in the modern hemi applications, there's no breathers coming off valve covers, the PCV ports are integrated into the intake manifold.
Also the PCV hose would be connected to the inlet side of the supercharger, which is constantly sucking in air.
@@newguysgarage6802 yes exactly. Basically using the supercharger a vacuum pump. I can't find any examples of guys doing this on TH-cam. But it makes a lot of sense to me
Ahh ya they must have a passage to the crankcase through the intake then i see.
But theoretically it could work...might have to worry about oil getting sucked up and thrown through the supercharger but that should be that big of an issue.
But i guess the real question is, whatever air that is going in is the same air that is getting thrown out so really the bung in the exhaust tube would be just as effective as this theoretically possible solution would it not 🤔
Only then you wouldn't be feeding dirty air through the motor if its hooked to the exhaust. 😅
Also supercharged engines need this? If yes is it the same method?
Yes will help with supercharged engines too, if roots or centrifugal supercharger its the same.
For a turbo application however im not sure how or were you would want to put it......after the turbo mabey 🤔
After turbo won't have enough scavenge effect to draw a negative pressure (vacuum) from the crankcase.
Ahead of the turbo will play havoc with spooling the turbine...so no, don't really work with turbos
Hello o just did it on my 327 and the question is do i need a breather on the engine ? Like the old intakes? I have the airgap and now Both sides of the valve covers go to the headders so i dont know if i got it right thanks
Nope not required when using an evacuation system 🙂
@@newguysgarage6802 thank you so much for reply 🙂🙂🙂
@@murmullosBOMBUSKLAP no problem 😁👍
How much horse power does it increase
Not a fixed number
Changes with every combination, just like anything else lol
think I'll just stick with a PCV system
Thats fair enough 😂
Thats fine and all but why would you have a tv and pictures and stuff inside your house and not more engine? weird
Omg......your right! 🤔
Super high compression motors at full throttle would blow oil out on the track. This was developed to stop that. Some one is always making up crap to explain something.
No.
Very high compression engines do make a lot of blowby, but not enough to oil the track unless it's so worn out the engine itself becomes an oil pump out the exhaust.
The scavenge effect from the header collector does in fact create a significant amount of negative pressure, or vacuum to pull from the crankcase, therefore removing any blowby and also helping the rings to seat because of the vacuum below the rings. The system increases power significantly on high compression high horsepower applications.
Don't know what you are going on about, but the system DEFINITELY works. And I can prove it with my own setup
Ok, that is what the car wants you to believe, but in fact, that is a Crack pipe for the engine... Its why it finds your inputs more interesting and seemingly has more power/responds better with it... Just ask any cra(n)ck-case and you will get a honest answer... Machinery likes to hide its vices, but not junkies... :P
p.s. all jokes aside, that is a brilliant system, but quite severely incompatible with modern cars... All the nonsense added onto the exhaust that does not like oil and shit like that... The catalyst, the dpf in case of a diesel and such systems dont really fare too well with oil contamination... I dont hate those, dont get me wrong, i love the catalyst and dpf on diesels, for they really do make the car much less offensive to the nose, but they force you to place this weld pipe much further down the exhaust, after both the turbo(90%of modern cars) and the filters like the cat and dpf, which can place it over a full meter(over 3 feet) away, making you rely on much longer hoses to connect to the covers... And longer hose reduces pressure by itself, or negative pressure, rendering the system less efficient(even less so, as its much further away from the manifold, where the venturi effect would be the strongest) and at risk of catching fire if not well assembled to make sure your hose cant touch the hot exhaust in the first 3 feet after the manifold... Sure, there are solutions to it, but this is really a cherry atop the cake for essentially pre 1970`s or even pre `60`s cars with their much less complicated systems... Which i know the channel is all about, but i cant help myself from lamenting the apparent flaws of complexity with modern cars... By modern, i mean from 1990s to 2012... 2012 and after arent cars anymore, its just overpriced junk designed to fall apart in less than a decade... Looks amazing and drives amazing, but its junk...
Lol 🤣
Thats awesome 👌
Can we communicate on discord or email, quite an interesting subject
Just saw your comment man!
My email is NewGuysGarage@gmail.com
Excellent. What Ive learned here has expanded my knowledge. I need to demand a raise now that I’m bringing more to the table. I’m putting you down as a contact on my resume.