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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 02-02-2008, 02:21 PM   #81
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I may try the 2 hoses to a breather can setup. Talking with the shop that built my engine, they've experienced seal/gasket failure because of excessive crankcase pressure when running high boost, they didn't say how high. They fixed the issue by drilling a large hole in the valve cover and running a large breather to it. I was only running 9-13psi with the SC, so I don't think I was experiencing the problem, but with the eventual turbo install, the boost level may be higher. Perhaps just gutting the PCV valve and use it as a nipple for that port, then connecting it to the can with the other nipple from the driver side would be enough.
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Old 02-02-2008, 02:44 PM   #82
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I was seeing evidence of CC pressure at 10psi. I swapped the PCV port with vent port since it was far less restrictive and that stopped any of the oil seepage. But when the boost went to 17psi it was back. So it's going to take a vent port on each side of the cam cover to a catch to solve my pressure venting issues- primarily because the FE has a divide cam cover from the exhaust/intake sides. Details here.
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Old 02-02-2008, 04:10 PM   #83
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[/QUOTE]

What if, in the interest of maintaining crankcase ventilation in both boost & off-boost (and emissions), a hose was in place of the VTA breather and routed to the pre-turbo intake? Other than simplicity, I don't see the benefits of a breather, and an additional filter could be placed in this line to reduce or eliminate oil contaminating the turbo inlet. Thoughts?

Edit: I just read the hondatech link http://www.honda-tech.com/zerothread?id=1199935 and this is listed as "Intake slashcut evacuation". The only downside listed is a gradual coating of the comp housing and intercooler, which might be alleviated with a clear inline fuel filter. Hmmm...

Last edited by adjemin; 02-02-2008 at 04:43 PM.
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Old 02-04-2008, 09:20 PM   #84
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i did the catch can setup, and it kicks ***. i've always burned a little oil under decel in gear... well, after this i dont have the gasses going back into my intake under vacuum. now, nothing... no smoke, no burning, no nothing. and the car, drives and idles perfect.
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Old 02-06-2008, 08:39 PM   #85
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could you instead of running a catch can like in scotts pic, just drill out the pcv and put a little ricer filter on it like people usually put on the other side too?
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Old 02-06-2008, 09:04 PM   #86
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Here's how I did mine. This pic shows the 3/8 lines that go to a T and then into the canister. I used steel wire inside the hose so I could get it to bend smoothly for aesthetics and so it wouldn't kink.




This picture shows the catchcan I made with PVC pipe and a Autozone breather.
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Old 02-17-2008, 11:59 PM   #87
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Well looks like breather filter is coming off as well as the PCV being gutted...

Question for you guys, I get the idea of bringing both sources (capping the barb on the intake mani) and bring to catch can...Which has a breather filter on top..
But then what??

Gonna need a drain no???
And I'm guessing the drain would be to empty not to recirculate back into the oil pan??
And lastly do both lines end at the catch can or is the catch can spliced into both lines which will go somewhere else??

Inquiring minds with pvc pipiing want to know!
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Old 02-18-2008, 10:56 AM   #88
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I hooked my breather to my intake this weekend. I think it changed the idle some though I haven't driven the car to be able to tell. Clutch problems.
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Old 02-18-2008, 11:56 AM   #89
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Quote:
Originally Posted by Braineack View Post
This isn't gonna do squat. The 2 ports see the exact same pressure - and your dipstick will blow out.
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Old 02-18-2008, 01:18 PM   #90
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Quote:
Originally Posted by JasonC SBB View Post
This isn't gonna do squat. The 2 ports see the exact same pressure - and your dipstick will blow out.
Chill; I think the pic shows an air filter attached to the catch can.
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Old 02-18-2008, 01:32 PM   #91
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Quote:
Originally Posted by JasonC SBB View Post
This isn't gonna do squat. The 2 ports see the exact same pressure - and your dipstick will blow out.
wouldnt ur dip stick only blow out if u were boosting the crank case?

so if ur following that picture, it shouldnt blow out
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Old 02-19-2008, 09:56 PM   #92
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OK I didn't notice the little hat to atmo on the can.
If the 3 ports are connected (2 hoses + filter) via the catch can, it still doesn't make sense. May as well just leave one port on the cam cover open, and one closed; the open one should just open to atmo. Why place a filter at all? Just put a hose on one port, and vent the other hose to atmo, near the ground to let the oil drip out.
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Old 02-19-2008, 10:23 PM   #93
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Let the oil drip out, all over a track, driveway, etc? If the valve cover has problems venting the excess pressure, then 2 3/8" hoses going to that can would be better than one. Maybe a larger filter than those cheapie small ones would be better as well.

I'm going to put a pressure gauge on the driver side port while in boost to see if the crankcase is experiencing any pressure, then modify if necessary.
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Old 02-19-2008, 10:47 PM   #94
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It's not like these can's fill up with huge amounts of oil. Just put a small NPT male-male fitting in the bottom with a cap on it. Then drain it once every 4 years when it has an inch of oil in it.
Unless you have blow by like scott of course.
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