I was thinking about drilling some holes in the side of the block to vent everything. The oil drains from the head are pretty small, asking all the pressure to come back up and the oil to drain down the same few small galleys seems like a lot.

The only reason there is a PCV system is for emissions. It is far more efficient to vent everything straight to the atmosphere.

 

just tried to read through all 7 pages of this - a bit of information overload lol but i have some questions (sorry in advance if they are dumb, i'm somewhat of a noob at this )

for the guys who are blocking off the pcv valve altogether, wouldn't that prevent blowby gasses from escaping the crankcase? i can understand maybe venting the pcv valve to atmosphere but capping it altogether seems like it would have a negative affect?

i've always had my catch can routed pcv -> catch can -> intake manifold and i've gone back and forth with running the breather valve to a breather filter or back to the intake. i recently hooked it up back to the intake because i was told this would help increase crankcase vacuum.

 

Wow, great thread! I just read this whole thing, I am trying to summarize these for future visitors. So, please correct me if I am wrong. I do have a couple of questions...

2 different setups here:

1) Macr88 style

- Drill holes in the baffle.
- Replace PCV valve with fitting.
- Add catch can and vent PCV replacement fitting to catch can and run line from catch can to intake manifold.
- Run line from breather vent in valve cover to intake hose with a crank vent in it

Macr88 - Why the crankvent and Which way is the crank vent pointing?

2) robrob style

- Cap PCV on valve cover
- cap PCV inlet on intake manifold
- cap breather inlet on intake hose
- Vent breather line from valve cover to ctatch can. Catch can vents to atmosphere.

RobRob - Did you drill holes in baffling or not?

Thanks all!

 

1- I would only do 6 small holes and not 7 so skip the one under the PCV valve
2- I still have the PCV valve in place.
3- correct except for PCV replacement
4- it's just an expensive coupling at this point, I gutted the crank vent.

Just a heads up, this has worked on all but two people and I'm not sure why it didn't work with them, I was never able to see the holes they drilled.
I've tried many other methods and no luck

 

I'm curious if part of your method may work for me, as my blow by problem seems a little different than most people.

I've got a new engine, an AP2 block with an AP1 head and valve cover (2003).

The engine burns absolutely no oil (unlike my last one which was a sieve). I've been to the track on three occasions now and absolutely no oil burned there either.

Except for one circumstance...On a long left hand medium speed (50mph) sweeper, if I'm in 2nd gear at high rpms (6-7000rpm), I would suddenly get a loss of power and then immediately huge clouds of oil burned smoke. I don't know if it would happen under a right hand sweeper, cause I haven't been on one at the same speed/rpm.

If I take the same turn in 3rd gear, I have no problem. So, I assume it's related to either the high rpm or VTEC engagement, or both.

I assume that large quantities of oil passed through the PCV valve to the intake manifold, then into the combustion chamber. It fouled the plugs for a moment (hence the loss of power due to no combustion), then got burned off (the huge clouds of smoke).

A little weird it occurred on a left hand turn, since that would throw the oil to the right side of the engine, but I'm sure it's affected by the baffle, and again, I don't know if it would occur under a right hand turn since I haven't' encountered one.

I hadn't taken this particular turn with my previous old engine, so no comment there. No other S2000's have probably ever been on this track either.

Here is a video of the track, in a different car. It's the last turn that points directly at the big grandstand after it straightens out. This track is an old SCCA road course from the 1950's and 60's in Pomona, CA.

http://www.youtube.com/watch?v=YPeRU...ature=youtu.be

What do you think about drilling holes near the PCV valve to allow oil to not build up in that area?

Thanks.

 

The left hander at 1:37 or so?

 

No, sorry I wasn't clear. The first lap the sweeper is from about 1:20-1:27. Again at 3:02-3:13, and again at 4:45-4:55.

For some reason, the link to the video doesn't show in my previous post, so here it is again if needed.

http://www.youtube.c...eature=youtu.be

 

Hi everyone,

I'm hoping one of you will be able to help me out. I experienced something rather strange at autocross this past weekend. Decelerating from 75-80+ MPH going into the final slalom of the course, I found I was getting quite a bit of smoke, which I have experience none of in the past. However, I had much better tires this time around than I have in the past, allowing me to corner/brake harder. Having read some of this thread before, the smoke did not concern me very much. However, went I got up the courage to keep the power on despite the smoke (during my last run), I noticed a significant lag in power delivery.

Also, the perspective of the video makes the right turn into the slalom seem pretty gentle, but it seemed quite a bit more aggressive, considering how hard I was on the brakes, decelerating from 75-80 MPH to 45-50 MPH.

Here's a video of what I experienced - please ignore the bad driving, this was my last run of the day, and my concentration was on the conditions under which the smoke occurred, not getting a good time.

http://www.youtube.com/watch?v=wkJ9U...ature=youtu.be

I think it's important to note that this is the only time that it affected performance, and the lag when I got back on the throttle produced the most smoke, by far. Any time it happened however, the car ran fine before and after, and I could NOT replicate this issue any where else, either on other sections of the course or during straight-line accel/decel. I can't think of a place I could try to replicate this on the street, either (not planning to...).

 

It doesn't seem like it would be a PCV issue but it does seem like it could be a fuel starve issue although I don't think a motor smokes when it's lean does it?

 

No, the massive smoke was definitely oil burning. Why wouldn't it be a PVC issue?