SHO--ripper
928 Euro
Can i just cap the connections at the TB/Intake and run 2 K&N breathers?
Pcv ?
- Thread starter SHO--ripper
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Yes..
SHO--ripper
928 Euro
I like the way those breathers look. 
stevemainian
New Member
k&n breathers?
Yamaha V6
SHO Enthusiast
Chris, that's the way I did it on my supercharged SHO. Vadim originally had me tie the two into a "T", and use a single breather, and I still ended up blowing the oil seals. Converted to 2 separate breathers, and things were better.
The best way is to apply vacuum to help seat the rings / reduce oil blow-by, that's a little more involved to make work, but others here have done it.
The best way is to apply vacuum to help seat the rings / reduce oil blow-by, that's a little more involved to make work, but others here have done it.
SHO--ripper
928 Euro
I'm going to put a K&N breather on the valve cover and plug the intake, then plug the TB and put a K&N breather on the end of the PCV line. Is that what you did fred? Over the next few months i'll bring the car down to NESS 
Yamaha V6
SHO Enthusiast
Chris, you will get some oil spewage, so also consider a catch-can, or like me, make the hoses long enough to get the drippage away from say, the coil pack, etc.
You will also get vapors from the breathers, so if you put it near the back by the firewall, you'll get the smell inside the car, and you'll see the vapors at idle - not anything to worry about as far as deposits on the windshield (like, from the Bluesmobile near the end), but it looks to the casual viewer that you have a fire going on under the hood.
If you route the tubing way under the car, be aware you'll get water / condensation buildup, and on cold mornings it can freeze, eliminating the PCV completely, resulting in blown out oil seals. Been there, done that.
You will also get vapors from the breathers, so if you put it near the back by the firewall, you'll get the smell inside the car, and you'll see the vapors at idle - not anything to worry about as far as deposits on the windshield (like, from the Bluesmobile near the end), but it looks to the casual viewer that you have a fire going on under the hood.
If you route the tubing way under the car, be aware you'll get water / condensation buildup, and on cold mornings it can freeze, eliminating the PCV completely, resulting in blown out oil seals. Been there, done that.
SHO--ripper
928 Euro
Fred how much oil will be coming out?
Yamaha V6
SHO Enthusiast
Enough to be wet, & drip on stuff, nothing to be sweating over for street, but at the track you want to have that taken care of. If they see it, you're done. Oh, and it's not good to spew anything at the track anyway, for safety's sake. Someone once told me that, or I read it on the box of Lucky Charms.
I need to take care of this as well. What places do I need to put a breather on. Any pics?
RJ-92
Active Member
I just ran to small fuel filters between the PCV and the vacum ports on the TB. Catches some of the crap.
PAracer
Active Member
I have a PVC container with a screw-on cap and three barbed fittings near the top. Two hoses connect the crank case to the can, while a third runs to the TB. Inside the can is a plastic baffle separating the TB side from the crank case. This maintains normal pressures while collecting the goo before it can get to the intake. I suck about a cup of oily liquid with each oil change. The amount depends on weather, too. Rainy, wet weather will fill the can faster.
Yamaha V6
SHO Enthusiast
Problem is guys, you can't run the fuel filter idea or the typical Naturally-Aspirated catch-cans with a boosted SHO.
The air's supposed to go into the intake, cycle through the engine. With the 2x PCV lines and the intake all receiving the pressurized air, pressure builds up in the crankcase until the weakest links blow out (usually the oil seals - cam seals, front and / or rear main seals), but can be worse.
You cap the intake & TB sides of the PCV lines, and put breathers on the hoses coming from the block & the front cam cover to allow exhale (inhale in certain circumstances) freely, without risk of overpressurizing. Then all the boosted air goes down the intake, where it's supposed to. If there's piston ring blow-by to the crankcase, it can vent out the breathers. Nothing wrong with doing the catch-can / breather combo, just make sure there's only the engine-side of the lines running to it, and the intake side is capped.
The air's supposed to go into the intake, cycle through the engine. With the 2x PCV lines and the intake all receiving the pressurized air, pressure builds up in the crankcase until the weakest links blow out (usually the oil seals - cam seals, front and / or rear main seals), but can be worse.
You cap the intake & TB sides of the PCV lines, and put breathers on the hoses coming from the block & the front cam cover to allow exhale (inhale in certain circumstances) freely, without risk of overpressurizing. Then all the boosted air goes down the intake, where it's supposed to. If there's piston ring blow-by to the crankcase, it can vent out the breathers. Nothing wrong with doing the catch-can / breather combo, just make sure there's only the engine-side of the lines running to it, and the intake side is capped.
Again, any pics. I know of the one on the bottom of the TB, and of the one on the valve cover, but where are these other two you speak of? Actually, I think I know of the one on the block under the intake as well, but you said there are four?
SASHO91
Zoom Zoom
yes pics would be good! need to start putting my stuff together as well.
SHO--ripper
928 Euro
Tim you got it right. You only need to put breathers on the valve cover and the line coming from the block that connects to the TB. Hopefully i'll have it done this weekend and i'll post some pictures
Yamaha V6
SHO Enthusiast
There are only the 2 lines, not 4 Tim.
Block under intake ---> Breather /// Capped at TB
Front Cam Cover ---> Breather /// Capped at Intake
What you do between the Cam Cover or TB & those breathers (like a catch can) is up to you.
Bottom line: CAP THE 2 AIR POINT AT THE TB & INTAKE.
Block under intake ---> Breather /// Capped at TB
Front Cam Cover ---> Breather /// Capped at Intake
What you do between the Cam Cover or TB & those breathers (like a catch can) is up to you.
Bottom line: CAP THE 2 AIR POINT AT THE TB & INTAKE.
Lupo
New Member
You can get a constant vacuum from the intake side of the turbo/supercharger. I would recommend using some sort of catchcan at least for the oil and oil vapors.
I'm working on an electric vacuum pump. This way, I will not introduce oil vapors back into the intake, which could contribute to detonation, and my intake won't get dirty the way it normally does with all SHOs.
I'm working on an electric vacuum pump. This way, I will not introduce oil vapors back into the intake, which could contribute to detonation, and my intake won't get dirty the way it normally does with all SHOs.
92sho16
b00sted
what about jason yamahaSHO's set up? Is that adequete?
DemonNeno
SHOCAGO Freak
What about running AN lines right to the exhaust, past the cats to prevent any damage to the cats & 02s? I was contemplating this as it would reduce pressure and prevent the mess from building in the engine bay.
Input?
Input?
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