I agree. Everything you say is right. I was telling about things I have tried. Here is the set up right now on the car. Everything is stock but the three PCVs. There is no "fresh air" restriction from the TB. It was something I had tried that didn't work.
I agree with the diagram 100% also.
The car was sucking a WHOLE lot of air through the Tb /vc tube. From the TB to the VC. So much in fact that it was sucking oil into the upper manifold and it was pooling in there. When disconnection the tube on the bottom of the upper intake, oil would run out for a long time. Probably at least six ounces.
When you launch the car and get in the high RPMs for a while, there is a lot of blowby built up, when you let off the gas after a run, that's when manifold pressure is the highest, at least that's what my guage reads at that point. I'll hit about 22Hg decelerating. At that point the PCV is open and doing it's thing.
If my set up works at idle at 16 Hg, then it's probably going to work at 22 Hg after letting off the gas. While the car is floored, nothing is sucking the air out. Blowby is there though, trying to get out. On the race cars you put 1/2 to 1 inch tubes connected from the valve covers to the collectors to overcome this problem at wide open throttle.
In this setup, the blowby might just go from the VC to the TB, if it has time too before the 22 Hg starts pulling it out the PCV. The oil getting into the intake doesn't start to happen until you run it and then let off. I have watched it through a glass gas filter way too much as seen it do this. The harder you are running it when you let off, the more oil there will be when you check the PCV tube. The problem is the blowby stirring the oil up, and there is blowby in this engine. The oil stick been blown out though...lol
I think I see what you are saying about restriction the airflow, but it's not restricting the air flow enough to cause problems. When the manifold pressure drops to zero, we just have to wait and see how much builds up and where it might go. Probably a little oil will get in the TB. Then its a good idea to install a little filter light was discussed earlier.
Think of a Vortech superchrger. You don't route the tb line to the tb anymore, or you would have a pressurized engine. The line is run to the K&N airfilter houseing with a fliter on the end of it that attached to the housing. You block off the TB with a cap. This is my car too. It will blow oil out the VC line when the PCV is installed correctly, but blugged up. I notice oil, I take another PCV off the shelf. I have about 10.5.1 compression with file fit rings. IT's probably around 425 hp on the dyno. I run it all the time at the track with no problems. This car doesn't have but 12Hg at the max at idle. THe idle on this one moves arouns a lot with the cam, but is suck the same amount of air through the tb tube as the other car does.
Both the TB tube are sucking the same at idle all the way up to 6000 RPM. I testes it with both cars runing with both my hands at the same time. I was thinking that my little system would fall down, but it did the same. I did the same thing with my brother's stock '92. I got the same results.
I do not believe I am resrticing the removel of Crakcase gas with this setup. I did at one time, so I change it to a one pcv set up. There was no differece that I could tell. Then I put in two PCVa. That stopped the oil comsuption, but ther was oil residu up past the second PCV, not much......buy I put another one on ther anyway.
THe only thing restricting the airfow if the actual parts of the PCVs They all open and close a nearly same time. It's just the oil gets cut off and caught beteewn the fitst two PCVs. it has the same Manifold pressure anywhere along the 3 PCV line. The pcv just block the oil great. Manifold pressure does drop the closer you get to the first PCV.
I spent a lot of time last year on my girlfriend car, it took a while to get it running right. She is pickey about her car, so I had to make it run smooth. \
I have tried to keep my thought on track this time, I'll check this out in the morning and maybe we will be on the same page! I think we are going to the right dirction to get this figured out for everyone.
Then the decisions can be made as to what to do. JUst try it my way first and then inprove on it. That would be cool!
This is great, I haven't ever had a topic pop up a year later out of nowhere to talk about again. I was tryng to post some pictures, I might work on that for a while
Thanks
Jim
s
Somebody just go out by some hose, clamps and tubing and then get back on here and tell me what you find.
I agree with the diagram 100% also.
The car was sucking a WHOLE lot of air through the Tb /vc tube. From the TB to the VC. So much in fact that it was sucking oil into the upper manifold and it was pooling in there. When disconnection the tube on the bottom of the upper intake, oil would run out for a long time. Probably at least six ounces.
When you launch the car and get in the high RPMs for a while, there is a lot of blowby built up, when you let off the gas after a run, that's when manifold pressure is the highest, at least that's what my guage reads at that point. I'll hit about 22Hg decelerating. At that point the PCV is open and doing it's thing.
If my set up works at idle at 16 Hg, then it's probably going to work at 22 Hg after letting off the gas. While the car is floored, nothing is sucking the air out. Blowby is there though, trying to get out. On the race cars you put 1/2 to 1 inch tubes connected from the valve covers to the collectors to overcome this problem at wide open throttle.
In this setup, the blowby might just go from the VC to the TB, if it has time too before the 22 Hg starts pulling it out the PCV. The oil getting into the intake doesn't start to happen until you run it and then let off. I have watched it through a glass gas filter way too much as seen it do this. The harder you are running it when you let off, the more oil there will be when you check the PCV tube. The problem is the blowby stirring the oil up, and there is blowby in this engine. The oil stick been blown out though...lol
I think I see what you are saying about restriction the airflow, but it's not restricting the air flow enough to cause problems. When the manifold pressure drops to zero, we just have to wait and see how much builds up and where it might go. Probably a little oil will get in the TB. Then its a good idea to install a little filter light was discussed earlier.
Think of a Vortech superchrger. You don't route the tb line to the tb anymore, or you would have a pressurized engine. The line is run to the K&N airfilter houseing with a fliter on the end of it that attached to the housing. You block off the TB with a cap. This is my car too. It will blow oil out the VC line when the PCV is installed correctly, but blugged up. I notice oil, I take another PCV off the shelf. I have about 10.5.1 compression with file fit rings. IT's probably around 425 hp on the dyno. I run it all the time at the track with no problems. This car doesn't have but 12Hg at the max at idle. THe idle on this one moves arouns a lot with the cam, but is suck the same amount of air through the tb tube as the other car does.
Both the TB tube are sucking the same at idle all the way up to 6000 RPM. I testes it with both cars runing with both my hands at the same time. I was thinking that my little system would fall down, but it did the same. I did the same thing with my brother's stock '92. I got the same results.
I do not believe I am resrticing the removel of Crakcase gas with this setup. I did at one time, so I change it to a one pcv set up. There was no differece that I could tell. Then I put in two PCVa. That stopped the oil comsuption, but ther was oil residu up past the second PCV, not much......buy I put another one on ther anyway.
THe only thing restricting the airfow if the actual parts of the PCVs They all open and close a nearly same time. It's just the oil gets cut off and caught beteewn the fitst two PCVs. it has the same Manifold pressure anywhere along the 3 PCV line. The pcv just block the oil great. Manifold pressure does drop the closer you get to the first PCV.
I spent a lot of time last year on my girlfriend car, it took a while to get it running right. She is pickey about her car, so I had to make it run smooth. \
I have tried to keep my thought on track this time, I'll check this out in the morning and maybe we will be on the same page! I think we are going to the right dirction to get this figured out for everyone.
Then the decisions can be made as to what to do. JUst try it my way first and then inprove on it. That would be cool!
This is great, I haven't ever had a topic pop up a year later out of nowhere to talk about again. I was tryng to post some pictures, I might work on that for a while
Thanks
Jim
s
Somebody just go out by some hose, clamps and tubing and then get back on here and tell me what you find.
