Stef's 7AFTE Tech/Project, First Dyno run pg16 Options

[presure2]

you know steff, back the day, the 5th gen guys would have the same types of problems.
i wonder if that one little hose is enough, they used to drill an extra vent in the valve cover to add a 2nd line, which may be where you end up going with it.

[hurley97]

right now I do have 2 vent lines hooked up. So far it isn't a problem but if it turns out I need more ventilation I may need to think about drilling another hole somewhere, maybe in the oil cap.

[97lestyousay]

right now I do have 2 vent lines hooked up. So far it isn't a problem but if it turns out I need more ventilation I may need to think about drilling another hole somewhere, maybe in the oil cap.

I just happen to have an intake cover with an extra hole dilled and pipe tapped for an extra
pcv line when is your birthday? lol You switched to the 94-95 intake correct?
One of a kind TRD engraved, polished, I tried it on my 97 if you remember. I was
going to cap the original and use the new hole but it was another problem entirely.
You can try it. hole not shown.





I can't use it and it might be just the ticket.

This post has been edited by 97lestyousay: Oct 31, 2008 - 6:51 PM

[hurley97]

haha, Thanks Randy. But I need more vents off the valve cover, all the vent tubes for the PCV system from my intake plenum are capped off right now.
I still have my '97 intake plenum though. When you tried that one on yours how did it work? But if your giving that away my birthday is in Jan

[hurley97]

I got my new wastegate... it's pretty

It's a Tial .5 bar (about 7psi) 38mm MV-S V-Band Wastegate. It's their new smaller sized wastegate.
I got it from HS Tuning, it was the best price I could find and their customer service was excellent.

[Batman722]

wastegate p0rn.

[d0w0rkS0n]

wow. that is pretty!!!

[playr158]

sweeeeeeeeeeeet

[presure2]

thats TIZZZZZIIIIGGGHHHHHTTT steff

[hurley97]

UPDATE:

A while ago but I forgot to mention it, If anyone remembers I used to get a misfire for cylinder #1 and sometimes #1 and #3 on cold start. I had the BKR6E's gapped to about 28 I believe. I regapped them to 30 with little improvement, still happened just a little less often. Finally I stole some BKR7E's from Dustin, gapped them to 30 and installed them, no more misfires... thank god.

My catch can overflowed and started pouring oil into my intake. I also started noticing a lot of blue smoke at random times, usually deceleration though.

So after Manny did a compression test on Jen's motor with bad results I got scared. I'd been feeling like the car hadn't been running as well for a few days. Then out of nowhere I started getting a misfire for cylinder #4 while driving, that's never happened before, so now I know something had to be wrong.

So I brought it in the shop at work and we did a compression test... results ---- cyl#1: 160---#2: 160---#3: 165---#4: 60
yes that's right, #4 was sixty, I didn't forget the 1....

So me and Peter talk about what the possibilities are: bad compression ring, damaged piston, bad valve, too much oil contaminating the compression rings. The oil control rings are underneath the two compression rings in order to catch the oil that comes from underneath the piston and distribute it evenly so as not to get too much in the combustion chamber which would cause misfires and get too much on the compression rings causing low compression.
Using the borescope we found out there was a whole lot of oil coming into the cylinder from the intake valve, the exhaust valve wasn't nearly as wet with oil.
It's a possibility that all the oil being drawn into my intake was getting sucked right into the first runner on its way in (which is cyl #4) and flooded the cylinder with more oil than it could burn off and accumulate too much oil on the compression rings. If that is the case then preventing the oil flooding may (possibly) give the rings a chance to regain their compression holding ability again.

So we proceeded to clean out all my intake pipes and intercooler, empty my catch can, then bypass the catch can for now so it's not forcing oil into my intake anymore. I hooked up my PCV valve the way it was stock and just have the smaller vent line still go nowhere since I still don't know what to do with it.

In the process I found out the ground for my intercooler pump had become disconnected so I reconnected it, who knows how long it's been like that.
Plus there was a slight vacuum leak at one of the capped ports on the intake manifold, had to fix that as well.

Anyway, with a working intercooler and not sucking in puddles of oil the car felt sooo much better that night, even with low compression in one cylinder. Since it seemed to be running fine and not getting any worse I decided to just drive it for a while and see if it continues to improve or not.

Less than a week later Peter brought my car in the shop for something else and decided to just check the compression again to see if there was any improvement. Results this time ----cyl#1: 160---#2: 160---#3: 165---#4: 75---- not too much but at least it didn't get worse, besides it had only been like 4 days and 100 or so miles.

So since all this I've put about 500 more miles on the car, I no longer get any misfire codes, and the smoke started greatly reducing until for the past few days I haven't seen any at all. Hopefully I'll get a chance to check the compression again this week and see if it's gotten better. Hoping for the best.

And today I bought a proper oil separator/breather tank. It's a one way and vents the air through a filter mounted on top while keeping the oil in the tank.

This post has been edited by hurley97: Apr 3, 2009 - 7:50 PM

[lagos]

That sucks Steff.
I don't think the compression is going to just come back up on its own though, at least not with it being that low.

It kind of sounds like the cyl failed because of the pump not being hooked up.

This post has been edited by lagos: Apr 3, 2009 - 8:11 PM

[d0w0rkS0n]

oh wow. thats crazy, im actually kinda worried right now. i have a semi-serious oil leak from my valve cover, everything feels fine while it runs, no mis-fires. but im a little worried about my catch can after reading what you did. atm, i have a line running from my pcv to my catch can, and the other line running to my compressor side of my turbo. anybody think thats a bad idea? or should i maybe just put a breather on it?



*hope everything gets better steff*


-Allen

[lagos]

oh wow. thats crazy, im actually kinda worried right now. i have a semi-serious oil leak from my valve cover, everything feels fine while it runs, no mis-fires. but im a little worried about my catch can after reading what you did. atm, i have a line running from my pcv to my catch can, and the other line running to my compressor side of my turbo. anybody think thats a bad idea? or should i maybe just put a breather on it?



*hope everything gets better steff*


-Allen

Thats the right way to hook it up. Just keep an eye on it and empy it before it overfills.

[d0w0rkS0n]

ok just making sure. wasnt sure if the suction would pull oil out and push it into my turbo.


thanks

[hurley97]

That sucks Steff.
I don't think the compression is going to just come back up on its own though, at least not with it being that low.

It kind of sounds like the cyl failed because of the pump not being hooked up.

That's possible. Right now if I knew what happened first and which things caused what it'd be a lot easier to fix, but I really have no idea.

It may regain itself, it may not, it all depends on what the original problem was. But right now it's worth trying and seeing what happens. The car runs just fine right now, runs awesome actually; no smoke, no misfires, it's like normal again just faster.

[hurley97]

oh wow. thats crazy, im actually kinda worried right now. i have a semi-serious oil leak from my valve cover, everything feels fine while it runs, no mis-fires. but im a little worried about my catch can after reading what you did. atm, i have a line running from my pcv to my catch can, and the other line running to my compressor side of my turbo. anybody think thats a bad idea? or should i maybe just put a breather on it?



*hope everything gets better steff*


-Allen

I wouldn't out it to a vacuum source, I'd just let it push out what it wants when it wants. Don't listen to Art, he had a 5S and now has a 3S, the 7A is completely different than either of those. I'm still experimenting with my PCV system right now, trying to find out what works, I've already gone through some things that don't work and yours sounds similar to one of the setups that didn't.

[d0w0rkS0n]

oh wow. thats crazy, im actually kinda worried right now. i have a semi-serious oil leak from my valve cover, everything feels fine while it runs, no mis-fires. but im a little worried about my catch can after reading what you did. atm, i have a line running from my pcv to my catch can, and the other line running to my compressor side of my turbo. anybody think thats a bad idea? or should i maybe just put a breather on it?



*hope everything gets better steff*


-Allen

I wouldn't out it to a vacuum source, I'd just let it push out what it wants when it wants. Don't listen to Art, he had a 5S and now has a 3S, the 7A is completely different than either of those. I'm still experimenting with my PCV system right now, trying to find out what works, I've already gone through some things that don't work and yours sounds similar to one of the setups that didn't.

oh wow. wel thanks for that. so you think i should just put a breather on the other end? is that what youve got going on? whats working for you so far?

[hurley97]

First crankcase ventilation system I had was this:

PCV to manifold like stock ---- and the second smaller vent hose off the valve cover going nowhere cause we didn't know where it should go

Problem with this was when over boosting (like over 11psi) for prolonged periods of time it would build up too much pressure and it spit out about a qt of oil through the small vent hose.


I revised this system thinking there was a problem with it to this:

Hollowed out PCV valve--->catch can--->intake before turbo
second vent hose still went nowhere, I was hoping it was just a backup and most of the oil vapors would be caught by the catch can.

Problem with this setup: the hollowed out PCV coupled with the fact that the other end was connected to vacuum source was pulling out way more oil than it would without being hooked up to a vacuum source and spitting a lot of that oil right into the intake. of course I didn't know this until the mess had already been made.


So I returned the PCV system back to the first way I had it for now. It seems like the PCV valve itself isn't allowing vapors to escape when the intake manifold is pressurized since the pressure in the manifold holds the PCV valve closed so whatever can't get out then is coming out the small vent line which just goes into my engine bay so now all those oil vapors are making a mess so I need to do something about it.

My plan is this, I will try leaving the normal PCV and connecting it to this:
(It's a Stef's Fabrication Non-recirculating Breather/Overflow tank...and it has my name on it )
then cap off the intake manifold end of the PCV hose and try to T in the smaller vent line to go to the same breather tank.

[d0w0rkS0n]

haha nice little piece of equipment you got their


ok so i took ur advice steff and i pulled my hose from the intake-->catch can off. and just put a breather on the second nipple of the catch can. so my current setup is kinda like ur second.

PCV--->Catch Can.
Breather attached to Catch Can.

but my *smaller* vaccum hose is still connecting the Valve cover to the Intake Manfiold.

[Hafkai]

but my *smaller* vaccum hose is still connecting the Valve cover to the Intake Manfiold.

This is causing your oil leaks at the valve cover... and it will damage a lot more if you leave it this way. When you hit boost with this hose connected you pressurize the crankcase and the tiny pcv valve won't be able to release this pressure. I removed the stock lines, plugged the small tubes, removed the pcv valve, fitted the biggest hose available and routet it to the air filter. No problems so far..