P1SC PCV question

Another P1SC install question.. in the directions it says to mount the PCV pickup CLOSE to the air intake filter?? do they mean IN it or what?!

What the directions mean is run the supplied hose from the PCV valve itself to "near the air filter" instead of having it hooked up to the intake from the factory. They do this to avoid preasurizing the crank case through the PCV and have the PCV vent blow-by back into the intake system (air filter). Let us know if you have any more questions.

What are the benefits to this? I always just used a check valve between my pvc and the intake.

There is no benefit... that is just the simple way of doing it. You can use a check valve too, but the easy way that they tell you to do this is by what they say in the directions... either way will work just fine.

I wonder why this isn't somthing that is addressed in vortech or paxton kits? Then again, maybe it is and I just overlooked it in the instructions. hmmmmm

I'm not sure exactly either, but you really have to do something about it since you will be flat out presurizing the crank case if you leave everything as is.

Hmmm, I'm calling up Kelley at paxton today, to ask.

Here's another add-on, I've seen it recommended to use the OE PCV from a Turbo-Coupe, it is designed a bit differently and is made for boosted applications. You can get it from any Ford Dealer.

Part # Motorcraft E5ZZ-6A666

I actually had one of those PCV's... it didn't impress me to be honest with you, didn't seem like it sealed any more than the factory one. What I ended up doing was getting a PCV for a Supra turbo and the gromet for it too. The PCV in the gromet actually fits in the factory gromet for our cars (the supras PCV is really thin, but the gromet makes it fit perfect). The PCV is a really, really good design for boost... you will see what I mean if you get one, you can 100% trust this PCV unlike the one for the SVO that I had before it (didn't seem too much different than the one for the regular 302). That is my setup and it works great, no problems at all.

Thanks for that info Don, will have to look into it when I get back to that point :D

I know it's just a PCV, but Supra anything sounds expensive! What did it cost you?

Thanks,
Jermey

Haha, no different than any other if I remember correctly... maybe 10 bucks tops for both the PCV and the grommet.

Don you got a part number? I want one. It would be nice to get rid of the double valve mess I had going on behind my intake.

Cool!

Looks like I'll have to pay my local Toyota Dealer a visit!

Thanks,
Jermey

Oh man, it's been a while since I got it... but you don't need a part number. I just went up to autozone or napa (can't remember which... just call) and ask for a 94' Toyota Supra Turbo PCV valve and gromet... they should have it. Mine isn't an actual Toyota part, so it doesn't matter. You'll see it and be like, "how the hell is this supposed to fit?!" It's about the diameter of a pencil if I remember correctly... and the gromet is round and short, but you'll see how it 'plugs in' to the factory gromet in our cars and it's not going anywhere once it's seated together. I think mine has a black metal base and a blue plastic top that goes to the line. I can see if I can take a picture later if you really need, but you shouldn't have a problem.

Thanks a heap don, I'm going to give this one a whirl here in a couple weeks.

No problem, glad I could help. Like I said, it is well worth it and you will see when you get the part what I am talking about. It's hard to see how it will fit, but it does as long as you buy the grommet for that PCV and place it in the factory one. You will end up with 2 grommets and a supra PCV.

Another thing I did too... I have a breather on my valve cover that I didn't want a lean condition coming from and DEFINITLY didn't want oil splatter and smoke coming from. As we all know, these are common things with blown Mustangs and a breather on the oil fill. What I did was take a small shutoff valve from Home Depot's pluming section and turn it into sort of a restrictor. It is a brass piece with threads on either end and a thin metal T as the valve that you turn to either open or close it. All I did was cut the line that goes to the PCV and put this inline with it to control vacuum to the PCV. The PCV hose fits perfectly right over the threads and you just clamp it on. This part is tedious and took time, but when you don't have a valve, you will notice that when the valve is fully open (or there is no valve) and you take the oil fill cap/filler filter off and put your palm on the neck as to seal it (assuming you have the vent nipple capped), you will notice that there is quite a vacuum there. This is fine when the stock setup is in place, but with boost, you don't want the PCV or the valve cover nipple getting boost, and you don't want a lean condition and/or smoke after being in boost by just throwing a breather on it. The valve is there to equalize the flow as good as possible. After trial and error, I would keep closing the valve little by little so that when the car sat at idle at normal operating temp, I could hold my hand on the valve cover fill (sealing it with the palm of my hand) for 30 seconds or so with no pressure build-up and no vacuum when you take your hand off. You can definitely see what I am talking about if you do this. It's a real hard balance to find, but once you get it right, it limits the vacuum at idle to ONLY take in blow by air from the bottom end and not any un-metered air from the valve cover neck. The reason I did this was because it is a far superior design to ATI's answer to the PCV issue even though theirs works just fine. On their setup, it simply vents blow-by out of the PCV and under vacuum conditions, it does take in the little idle blowby there is, but also just sucks in un-filtered, un-metered air. It works, but this other way is the best way because of the reasons above.

If that explanation was confusing at all, let me know, it kinda' confused me as I wrote it! It's hard to explain, but again, if you want, I can try to take a pic if you would like.