okay so for all of you saying this is not ideal, all the way through the RPM range. what is your solution. I'm messing with a pcv reroute on a 14 year old duramax. tired of truck stinking and also don't want turbo vanes, intercooler piping gummed up with oil residue.....this seems to be the best option. send it through the downpipe and out the ass end..
g'day mate. i have just fitted this system to my general motors holden aussie v8. its 304cui and it has .5 inches of vacuum at idle and and 6 inches at 7400rpm on the dyno at work! they work awesome, and they are mounted in the collectors just in front of the racing mufflers
i bought a set of jegs brand evacuation system and it works damn good no more oil up out of the dipstick tube nomore or the oil fitting on the back of the blocks leaking and it picked up an extra 20hp! i run 2 1/2 in to flowmaster super 40's then they dump right b4 the rear wheels on my 79 chevy short box
This doesn't prove a damn thing, except the guy making the video doesn't know how to test things. It looks like it is blowing the paper out, but you want it to SUCK the paper in. It should be pulling a vacuum. This is pushing OUT air, which means it would push dirty exhaust into the engine. The only way to actually know it works would be to measure vacuum on a gauge while the engine is under load.
@@charliesmith5545 Let's see, someone cannot spell "decide" and spells it "deside" in the headline. He sticks toilet paper in the airstream of a fan and claims the flapping paper proves exhaust evac works under engine load. Somehow all that 5th grade nonsense makes me a "moron".
@@charliesmith5545 I know how it works. It works on Bernoulli's principle. Bernoulli's principle requires an increase in velocity to reduce pressure. I'm saying if you actually measure that system with a real gauge under operation, there is no vacuum under most operating conditions. Too bad people don't actually measure stuff in a meaningful useful way.
How about when the engine is at WOT, where the exhaust system is posing a restriction? It's easy for an exhaust system to evacuate the crankcase while the engine is idling.
Huh? That's the point of exhaust evac. Pcv loses Vac at wot..... Exhaust evac will be way better than pcv at wot. If you want best performance, run a Vac pump. $$$
12 years later what do you have to say? Did your car burn to the ground from a exhaust system full of oil,,, did it smoke like a train and you took this crap off? How about an update 12 years later??
Don't know about the guy who posted this video but have run this on my 95 Z28 with long tube headers and straight through mufflers for a long time. My car doesn't smoke and the exhaust doesn't smell (you can smell it but it's mostly the no cats and even then there's not much smell to it). I have baffled valve covers though.
@@dupeaccount1647 Hello Dupe Account, I appreciate your intelligent comments & I completely agree with everything you're saying. I've used an evac. system for many years on my mildly built 455 Pontiac engine. This engine has a very healthy cam, 10:1 CR & full exhaust...with FLOWMASTER Mufflers. It habitually nails mid to high 9's in the 1/4...in my 1967 GTO. Yes, I run the 1/4 with full, 2'' exhaust. I've NEVER had any issues with oil in my exhaust, no smoke & no oil smell, etc. Also, the fodder I read in these comments about it not being functional at WOT are really strange. I have plenty of vacuum at wide-open throttle. In fact, the vacuum improved throughout the RPM range with the MOROSO crankcase evacuation system. According to the dyno, I gained 5lbs of torque & 3 or 4 horsepower with only this simple addition. What you stated about "baffled valve covers" is the most important factor. As is the importance to use filtered & baffled breather caps on the valve covers. Without these crucial baffles, oil would certainly be drawn into the exhaust system. In my opinion, the MOROSO Evac. System is superior to most...providing good vacuum numbers at wide-open throttle...due to one small but very important design innovation. If you look at the evac. tubes...which are welded into the headers...you'll notice they're "notched". The engineers designed this notch to allow crankcase pressure evacuation to be efficient at high RPM//WOT...when the exhaust gas velocity is much greater. QED; providing improved engine vacuum throughout the RPM range. Link to Summit photo: www.summitracing.com/parts/mor-97810 Best regards, Ben
I plan on installing one but have the same question...how is the vaccum affected at higher revs or at full throttle? The manufacturers aren't much help.
@hawkeyedm2003 Do you think the exhaust gasses are flowing faster at full throttle than at idle? If you would buy into this theory then you have your answer. I'm not sure if the relationship is linear but it could be close.
I have pan evac on my Jersey Speed Skiff with wet exhaust, works perfect, /chrylser check valves and chrome breathers. Check it out Daze of Thunder js-70
It's only proof that it works at idle with very little cylinder pressure and the exhaust not backed up, put it on a dyno at wide open and show me the same thing
Put baffles on the lines coming from the valve covers. You should be sucking oil mist not oil. Also make sure the checks valves are working and not in backwards.
I had something similar installed with mufflers and I was getting oil back through the hoses and then it was spilling out onto the valve covers. I believe what the concern with the mufflers is backpressure. I believe it does work when you are revving it up to 7k going down the road but then when you back out of it the backpressure spits it back through. maybe my check valves were not working or breather hole was slightly over a rocker arm. Either way it was not a clean way for me.
Jonathan Moody good point i am figuring out a system to use dont want to make holes in these new headers, if i find a better set up? thinking about using a factory pcv from a sixties muscle car they are supposed to flow better? and and run it thru a visable catch can then to intake and the other valve cover an open breather? since this post is older you might have figured out a cure for this problem? thanks in advance
on my renault 5 gt turbo i have what i think may be a crankcase ventilation issue. on start up and also sudden acceleration i have black smoke but it doesnt seem to be losing oil. it had a new engine about 2 yrs ago and new turbo about 4 and yes i sit and warm it for 5 mins and cool down 2 - 3 mins! the metal pipe off the elbow gets coked up and also the c/case filter and metal pipe that that sits on also has oil inside. any ideas??
i just got my motor up and running, i don't have any PCV on it and i opened the hood after a 5 mile drive and there was oil all over the place, i think its blowing out of the oil breather caps, did u have this problem, i have the same exhaust as you, was thinking of getting the same evac sys
Instructions say "not for use with mufflers" I believe they say this not becuase they wont work with mufflers, its becuase no matter what you will get oil in your exhaust to some degree and with mufflers it will collect and be a fire danger... trying to get more info but the specifically say not to use with mufflers and there has to be a reason.
Its due to back pressure from 2 chamber mufflers, borola x r1 mufflers have a straight threw design its bout 10 cfm less than straight pipe and because of this, they say that the x r1 mufflers work great with evac sysyems. I bought a sbc 427 for my impala and engine builder recommends any mufflers that have a perforated straight threw design will work great with evac system, so i got a set of pypes race pro mufflers that am going to install.
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The important part is the venturi angle, if it's not perfect, it won't pull any vacuum.
Placement in the collectors also matter
okay so for all of you saying this is not ideal, all the way through the RPM range. what is your solution. I'm messing with a pcv reroute on a 14 year old duramax. tired of truck stinking and also don't want turbo vanes, intercooler piping gummed up with oil residue.....this seems to be the best option. send it through the downpipe and out the ass end..
g'day mate. i have just fitted this system to my general motors holden aussie v8. its 304cui and it has .5 inches of vacuum at idle and and 6 inches at 7400rpm on the dyno at work! they work awesome, and they are mounted in the collectors just in front of the racing mufflers
Works great when using meth and 2 step
i bought a set of jegs brand evacuation system and it works damn good no more oil up out of the dipstick tube nomore or the oil fitting on the back of the blocks leaking and it picked up an extra 20hp! i run 2 1/2 in to flowmaster super 40's then they dump right b4 the rear wheels on my 79 chevy short box
This doesn't prove a damn thing, except the guy making the video doesn't know how to test things. It looks like it is blowing the paper out, but you want it to SUCK the paper in. It should be pulling a vacuum. This is pushing OUT air, which means it would push dirty exhaust into the engine.
The only way to actually know it works would be to measure vacuum on a gauge while the engine is under load.
That is the fan on the rad blowing the paper around you moron
@@charliesmith5545 Let's see, someone cannot spell "decide" and spells it "deside" in the headline. He sticks toilet paper in the airstream of a fan and claims the flapping paper proves exhaust evac works under engine load.
Somehow all that 5th grade nonsense makes me a "moron".
@@tomrauch5080 do more research. It's simple vacuum from the exhaust
@@charliesmith5545 I know how it works.
It works on Bernoulli's principle. Bernoulli's principle requires an increase in velocity to reduce pressure.
I'm saying if you actually measure that system with a real gauge under operation, there is no vacuum under most operating conditions. Too bad people don't actually measure stuff in a meaningful useful way.
@@tomrauch5080 lol...watch other video...it works.
How about when the engine is at WOT, where the exhaust system is posing a restriction?
It's easy for an exhaust system to evacuate the crankcase while the engine is idling.
Huh? That's the point of exhaust evac. Pcv loses Vac at wot..... Exhaust evac will be way better than pcv at wot. If you want best performance, run a Vac pump. $$$
12 years later what do you have to say? Did your car burn to the ground from a exhaust system full of oil,,, did it smoke like a train and you took this crap off? How about an update 12 years later??
Don't know about the guy who posted this video but have run this on my 95 Z28 with long tube headers and straight through mufflers for a long time. My car doesn't smoke and the exhaust doesn't smell (you can smell it but it's mostly the no cats and even then there's not much smell to it). I have baffled valve covers though.
@@dupeaccount1647 Hello Dupe Account, I appreciate your intelligent comments & I completely agree with everything you're saying.
I've used an evac. system for many years on my mildly built 455 Pontiac engine. This engine has a very healthy cam, 10:1 CR & full exhaust...with FLOWMASTER Mufflers. It habitually nails mid to high 9's in the 1/4...in my 1967 GTO.
Yes, I run the 1/4 with full, 2'' exhaust.
I've NEVER had any issues with oil in my exhaust, no smoke & no oil smell, etc.
Also, the fodder I read in these comments about it not being functional at WOT
are really strange. I have plenty of vacuum at wide-open throttle.
In fact, the vacuum improved throughout the RPM range with the MOROSO crankcase evacuation system. According to the dyno, I gained 5lbs of torque &
3 or 4 horsepower with only this simple addition.
What you stated about "baffled valve covers" is the most important factor. As is
the importance to use filtered & baffled breather caps on the valve covers. Without these crucial baffles, oil would certainly be drawn into the exhaust system.
In my opinion, the MOROSO Evac. System is superior to most...providing good vacuum numbers at wide-open throttle...due to one small but very important design innovation.
If you look at the evac. tubes...which are welded into the headers...you'll notice they're "notched". The engineers designed this notch to allow crankcase pressure evacuation to be efficient at high RPM//WOT...when the exhaust gas velocity is much greater. QED; providing improved engine vacuum throughout the RPM range.
Link to Summit photo: www.summitracing.com/parts/mor-97810
Best regards,
Ben
Do you have mufflers
I want this I do have them
Yes!! Muffles on system
Me Wagner adjustable pcv with a good catch can works great
45 degrees
I plan on installing one but have the same question...how is the vaccum affected at higher revs or at full throttle? The manufacturers aren't much help.
@hawkeyedm2003
Do you think the exhaust gasses are flowing faster at full throttle than at idle? If you would buy into this theory then you have your answer. I'm not sure if the relationship is linear but it could be close.
You will get oil in Mufflers. Best to modify the Valve Cover Breathers to Decrease their air flow, or Run Catch Can.
yesss i think i may do this now!
i can't find any good pics on what angle to weld the bung into the exhaust though..
I have pan evac on my Jersey Speed Skiff with wet exhaust, works perfect, /chrylser check valves and chrome breathers. Check it out Daze of Thunder js-70
why is it blowing out, surpose to be sucking in
It's only proof that it works at idle with very little cylinder pressure and the exhaust not backed up, put it on a dyno at wide open and show me the same thing
Put baffles on the lines coming from the valve covers. You should be sucking oil mist not oil. Also make sure the checks valves are working and not in backwards.
I had something similar installed with mufflers and I was getting oil back through the hoses and then it was spilling out onto the valve covers. I believe what the concern with the mufflers is backpressure. I believe it does work when you are revving it up to 7k going down the road but then when you back out of it the backpressure spits it back through. maybe my check valves were not working or breather hole was slightly over a rocker arm. Either way it was not a clean way for me.
Jonathan Moody good point i am figuring out a system to use dont want to make holes in these new headers, if i find a better set up?
thinking about using a factory pcv from a sixties muscle car they are supposed to flow better? and and run it thru a visable catch can then to intake and the other valve cover an open breather?
since this post is older you might have figured out a cure for this problem?
thanks in advance
on my renault 5 gt turbo i have what i think may be a crankcase ventilation issue. on start up and also sudden acceleration i have black smoke but it doesnt seem to be losing oil. it had a new engine about 2 yrs ago and new turbo about 4 and yes i sit and warm it for 5 mins and cool down 2 - 3 mins! the metal pipe off the elbow gets coked up and also the c/case filter and metal pipe that that sits on also has oil inside. any ideas??
Black smoke is rich condition
@XMtnDude It is sucking in...
i just got my motor up and running, i don't have any PCV on it and i opened the hood after a 5 mile drive and there was oil all over the place, i think its blowing out of the oil breather caps, did u have this problem, i have the same exhaust as you, was thinking of getting the same evac sys
Ok....now, run it at WOT and see if it sucks. At idle who cares if your evacing, you need it all the way through the RPM range.
Instructions say "not for use with mufflers" I believe they say this not becuase they wont work with mufflers, its becuase no matter what you will get oil in your exhaust to some degree and with mufflers it will collect and be a fire danger... trying to get more info but the specifically say not to use with mufflers and there has to be a reason.
Its due to back pressure from 2 chamber mufflers, borola x r1 mufflers have a straight threw design its bout 10 cfm less than straight pipe and because of this, they say that the x r1 mufflers work great with evac sysyems. I bought a sbc 427 for my impala and engine builder recommends any mufflers that have a perforated straight threw design will work great with evac system, so i got a set of pypes race pro mufflers that am going to install.
@@land9990 Yep, running XR1s on my 95 Z28 with evac. Works great!
@@land9990 i run this system with 3in h pipe exhaust and black widow race venom mufflers, works like it should.