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Old 12-27-2010, 01:23 PM   #141
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So, for my setup would I be ok to ditch the pcv and route only that side to a can VATM and leave the driver side the way it is?

I just don't want to keep blowing oil into the intake manifold. I removed it the other day to clean and paint and had alot of gunky oil build up.
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Old 01-04-2011, 12:52 AM   #142
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Instead of a catch can, I plan to add scrubbers in the cam cover:
https://www.miataturbo.net/engine-performance-56/cam-cover-blowby-flow-crankcase-pressure-tiny-hole-modification-54742/

I also plan to enlrage the tiny 1/4" valve cover hole in the baffling, through which all the blowby gases are forced to flow.
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Old 01-04-2011, 01:07 AM   #143
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Quote:
Originally Posted by JasonC SBB View Post
Instead of a catch can, I plan to add scrubbers in the cam cover:
https://www.miataturbo.net/showthread.php?t=54742

I also plan to enlrage the tiny 1/4" valve cover hole in the baffling, through which all the blowby gases are forced to flow.
Been there done that. Works fine on the street. Full cornering grip on a winged car and full throttle track abuse and it still doesn’t work. Turn 5 and I think 6 specifically up the hill at Laguna loads up oil in the right back corner of the head I think and spooges it into the baffle a heavy amount.

Bob
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Old 01-04-2011, 01:13 AM   #144
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I didn't really think that setup would be good enough for you.
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Old 01-04-2011, 04:05 AM   #145
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Quote:
Originally Posted by JasonC SBB View Post
I didn't really think that setup would be good enough for you.
I will say it looks like the VVT cam cover looks as though it is set up a little better. Iím using a 94-97 valve cover on a 99 head and the opening for the baffle in the cover is further in the back corner and it is just above the raised hole in the head to the lower portion of the block designed as the main path for blow by gas to get from the lower to the upper crank case. My theory is in a hard right left turn with a lot of acceleration the oil in the top of the head all goes to that corner and blowby gas ends up pushing liquid oil into the baffle rather than just vaporized oil particles.

Bob
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Old 01-09-2011, 03:12 PM   #146
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So for AN fitting attachments, what sizing is the best.. -10 or -8. I imagine that the holes in the cover aren`t even close to the size of -10.
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Old 01-09-2011, 11:24 PM   #147
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drill it out.
your going to move the same volume of air... do you want high or low velocity to move that volume?


go -12 if you CAN.
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Old 01-10-2011, 04:27 AM   #148
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Quote:
Originally Posted by falcon View Post
So for AN fitting attachments, what sizing is the best.. -10 or -8. I imagine that the holes in the cover aren`t even close to the size of -10.
I used -8 for the valve cover -10 for everything els. total guess on my part.

Bob
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Old 01-10-2011, 12:23 PM   #149
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I bored my breather out to 1/4" NPT, and used 1/2" hose:
https://www.miataturbo.net/showpost....3&postcount=20
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Old 01-10-2011, 03:07 PM   #150
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Quote:
Originally Posted by JasonC SBB View Post
I bored my breather out to 1/4" NPT, and used 1/2" hose:
https://www.miataturbo.net/showpost....3&postcount=20
-8 is 1/2" hose. 1/4" NPT has a smaller hole in it than my -8 AN weld bungs though I believe.

Bob
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Old 01-10-2011, 04:28 PM   #151
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I measured the i.d. of my fittings, and they were about 0.38" ~ 0.40". Ditto for typical 1/2" barbs. The enlarged hole inside my valve cover is 0.40".
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Old 04-06-2011, 02:45 PM   #152
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Where is that $150 "racing" catch can system?
I can't find the post for the life of me......
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Old 04-06-2011, 07:04 PM   #153
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Ahh bbundy posted it in another thread:
http://www.mann-hummel.com/industria...BVFLGOcGNM.pdf
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Old 04-18-2011, 06:29 PM   #154
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Quote:
Originally Posted by bbundy View Post
I think numerous people who have flogged the crap out of there cars on the track have experienced the dip stick popping up and a bit of oil spray into the engine compartment by the dip stick. Seen it happen many times.

The owners usually freak out when it happens wondering what they screwed up then they put the dip stick back in and it doesnít do it again. It is kind of an intermittent thing.

It can also happen very often on a boosted car with a bad PCV valve though and might happen more if you are low on oil.

Bob
THIS is what my car has (hopefully) and not a bad engine.
Now I only need to fix it's 2nd issue too: 6500rpm flat spot.
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Old 04-19-2011, 02:47 PM   #155
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Btw venting to exhaust is working great

But

Despite no smoke clouds you will get a greasey rear bumper after a month or so.
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Old 04-19-2011, 07:30 PM   #156
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Quote:
Originally Posted by Faeflora View Post

Btw venting to exhaust is working great

But

Despite no smoke clouds you will get a greasey rear bumper after a month or so.
Mine was sucking oil out the catch can and making huge clouds of smoke the first time I tried it on the track. A combination of some on off throttle, high G left turn, with hard acceleration off a left hand corner puked lots of liquid oil into the catch can faster than it would drain back.

Solution: eliminated the vent on the intake side that was the stock PCV port and problem dissapeard. I’m just using the valve cover vent that comes out on the exhaust side which is baffled to the center of the valve cover. I also have a vent hose going into the side of the block by the alternator same location as some 1.6l blocks have a capped off port. I also found a PCV valve that fit perfectly to work as a check valve in my return hose to the very bottom of the pan.

What I learned is the baffleing for the PCV port in the valve cover dosn't work. oil must pool up in the back right corner of the valve train where the stock baffling has its inlet on that side.

Bob
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Old 04-25-2012, 01:31 AM   #157
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so basically the catch can is not necessary? I'm still a little unclear on how you have the return line. basically just a line with a check valve between alternator port on the block and a port you made in the pan?
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Old 04-25-2012, 03:38 AM   #158
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Quote:
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so basically the catch can is not necessary? I'm still a little unclear on how you have the return line. basically just a line with a check valve between alternator port on the block and a port you made in the pan?

yup you vent the alt4ernator VTA

and

the catch can to the power steering pump
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Old 05-19-2012, 09:21 PM   #159
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Quick stupid question. I'm still out of a job and I need to fix my blow-by issues, can I get away with blocking off the IM port and placing a filter on the hole in the intake side of the valve cover?
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Old 05-19-2012, 09:24 PM   #160
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Quote:
Originally Posted by buffon01 View Post
Quick stupid question. I'm still out of a job and I need to fix my blow-by issues, can I get away with blocking off the IM port and placing a filter on the hole in the intake side of the valve cover?
I doubt it. When I ran with the intake side blocked I was puking out oil from the driver side. You should just vent both sides to a catch can like setup.
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