Drivetrain Installing an OCC
#26
Saturday morning I installed the OCC as per my first sketch, then obehave and clifft's posts made me think more about it.
Here's my install as of this morning (Monday - Gandini OCC alt sketch! - the sketch quality is not any better but still trying to get the feel for using a pen and tablet instead of a mouse!):
I recall on an earlier OCC thread some pictures of the second OCC installation, with the can in the air box. It looked pretty neat. Also this V2.0 setup has the neatest routing of lines (not as neat as stock, though!)
btw, the car runs just fine with this and the first setup, as it did with the M7 routing--all three do not seem to cause any drivability problems.
cheers,
Here's my install as of this morning (Monday - Gandini OCC alt sketch! - the sketch quality is not any better but still trying to get the feel for using a pen and tablet instead of a mouse!):
I recall on an earlier OCC thread some pictures of the second OCC installation, with the can in the air box. It looked pretty neat. Also this V2.0 setup has the neatest routing of lines (not as neat as stock, though!)
btw, the car runs just fine with this and the first setup, as it did with the M7 routing--all three do not seem to cause any drivability problems.
cheers,
#27
Originally Posted by gandini
Saturday morning I installed the OCC as per my first sketch, then obehave and clifft's posts made me think more about it.
Here's my install as of this morning (Monday - Gandini OCC alt sketch! - the sketch quality is not any better but still trying to get the feel for using a pen and tablet instead of a mouse!):
I recall on an earlier OCC thread some pictures of the second OCC installation, with the can in the air box. It looked pretty neat. Also this V2.0 setup has the neatest routing of lines (not as neat as stock, though!)
btw, the car runs just fine with this and the first setup, as it did with the M7 routing--all three do not seem to cause any drivability problems.
cheers,
Here's my install as of this morning (Monday - Gandini OCC alt sketch! - the sketch quality is not any better but still trying to get the feel for using a pen and tablet instead of a mouse!):
I recall on an earlier OCC thread some pictures of the second OCC installation, with the can in the air box. It looked pretty neat. Also this V2.0 setup has the neatest routing of lines (not as neat as stock, though!)
btw, the car runs just fine with this and the first setup, as it did with the M7 routing--all three do not seem to cause any drivability problems.
cheers,
#28
Originally Posted by gandini
Saturday morning I installed the OCC as per my first sketch, then obehave and clifft's posts made me think more about it.
Here's my install as of this morning (Monday - Gandini OCC alt sketch! - the sketch quality is not any better but still trying to get the feel for using a pen and tablet instead of a mouse!):
I recall on an earlier OCC thread some pictures of the second OCC installation, with the can in the air box. It looked pretty neat. Also this V2.0 setup has the neatest routing of lines (not as neat as stock, though!)
btw, the car runs just fine with this and the first setup, as it did with the M7 routing--all three do not seem to cause any drivability problems.
cheers,
Here's my install as of this morning (Monday - Gandini OCC alt sketch! - the sketch quality is not any better but still trying to get the feel for using a pen and tablet instead of a mouse!):
I recall on an earlier OCC thread some pictures of the second OCC installation, with the can in the air box. It looked pretty neat. Also this V2.0 setup has the neatest routing of lines (not as neat as stock, though!)
btw, the car runs just fine with this and the first setup, as it did with the M7 routing--all three do not seem to cause any drivability problems.
cheers,
#30
#32
None of the drawings are showing up for me.
And how does it compare to the diagram in my gallery https://www.northamericanmotoring.co...an_routing.JPG
And how does it compare to the diagram in my gallery https://www.northamericanmotoring.co...an_routing.JPG
#33
Originally Posted by ScottinBend
And how does it compare to the diagram in my gallery https://www.northamericanmotoring.co...an_routing.JPG
Gandini's second drawing is currently the preferred routing given one OCC.
cheers,
#35
#38
#40
#42
Originally Posted by ScottinBend
Ok I got it this time. Still no definitive answer on why my install is considered wrong.
Not venting the non PCV side (US drivers side) prevents clean outside air from entering the crankcase.
I don't share the belief that there will be a vacuum or negative pressure because of this, but I do think it would be an issue at throttle lift off. Something we do a lot in urban traffic and even in autocross. Accelerate hard and then let off and brake. The PCV will snap shut under high vacuum but you will still have an amount of blow by gas in the crankcase. The non PCV side will allow venting to happen.
#43
#44
I agree...I am quite confused myself.
I have an M7 can but it did not include the instructions people are talking about. I was gonna install it as Johan did https://www.northamericanmotoring.co...ad.php?t=63316
but I am not sure where the lower line is going. Is the M7 hose the same collapsible hose as the Alta?
Can someone please "tell me" which way I should go? I believe I have counted 4 or 5 possible routing options. Here is my setup, someone guide me. 1 can only, no VGS (saw routing options with VGS), no turbo and I'm not sure what else may be relevant.
Thanks all
Seann
I have an M7 can but it did not include the instructions people are talking about. I was gonna install it as Johan did https://www.northamericanmotoring.co...ad.php?t=63316
but I am not sure where the lower line is going. Is the M7 hose the same collapsible hose as the Alta?
Can someone please "tell me" which way I should go? I believe I have counted 4 or 5 possible routing options. Here is my setup, someone guide me. 1 can only, no VGS (saw routing options with VGS), no turbo and I'm not sure what else may be relevant.
Thanks all
Seann
#45
Originally Posted by obehave
Wool gathering
Not venting the non PCV side (US drivers side) prevents clean outside air from entering the crankcase.
I don't share the belief that there will be a vacuum or negative pressure because of this, but I do think it would be an issue at throttle lift off. Something we do a lot in urban traffic and even in autocross. Accelerate hard and then let off and brake. The PCV will snap shut under high vacuum but you will still have an amount of blow by gas in the crankcase. The non PCV side will allow venting to happen.
Not venting the non PCV side (US drivers side) prevents clean outside air from entering the crankcase.
I don't share the belief that there will be a vacuum or negative pressure because of this, but I do think it would be an issue at throttle lift off. Something we do a lot in urban traffic and even in autocross. Accelerate hard and then let off and brake. The PCV will snap shut under high vacuum but you will still have an amount of blow by gas in the crankcase. The non PCV side will allow venting to happen.
#46
Originally Posted by ScottinBend
But with the way I have mine installed I have both lines running to the upper intake tee from the occ. They are both basically vented to the air.
So, you're not using the grey hard line?
If so then the PCV will never function correctly. So you will not be venting the crankcase well.
#48
Originally Posted by obehave
This one worked.
Trying to use "open in new window" with your previous link results in this.
Trying to use "open in new window" with your previous link results in this.
Thanks for pointing that out to me.
#49
Originally Posted by ScottinBend
Why would the PVC valve not function correctly? This is the way all NA engines vent the PVC valve that I have seen.
Without a pic I'm making assumptions so I may be basing this on the wrong thing but since you didn't say I was wrong in my earlier post I'll assume I was right. Dangerous ground
NA engines DO NOT draw PCV vacuum before the throttle body or the carb. They draw it from a point in the induction system after the butterfly. That is the only way to pick up high vacuum at idle. This is what keeps the valve closed at idle but allows it to gradually open as vacuum drops of. As vacuum drops off and the engine works harder you are creating more blow by gas which escapes through the now open PCV. Even at WOT there is more negative pressure or vacuum in the induction path after the TB than before. Due to flow restrictions.
So using the point in the intake tube prior to the TB will essentially leave the PCV open all the time. Some may say that isn't a big deal. I happen to think it is.
It's your car though. Do what makes you happy. I am not saying I'm right you're wrong I'm just trying to address the questions you asked.
#50
Thanks O. The picture posted earlier by the Dr. P was of my install. He did the yellow to show the alternative.
My only concern is to make sure that the install is safe and that it works efficiently. I do not claim that my way is the only way, but I want to make sure that claims of any other install are backed up with a clear explaination. Something that was lacking in the other post, especially by one who shall remain nameless........lol.
Thanks for your help and for the explaination.
My only concern is to make sure that the install is safe and that it works efficiently. I do not claim that my way is the only way, but I want to make sure that claims of any other install are backed up with a clear explaination. Something that was lacking in the other post, especially by one who shall remain nameless........lol.
Thanks for your help and for the explaination.