04-17-2012
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#21
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Pewp Champion
Join Date: Nov 2003
Location: Blaine
Drives: Teh Bean
Posts: 12,309
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Re: Crankcase ventilation
You're putting it back into the block? Interested to hear how that works as everything I've ever drained out of my catch can doesn't look like anything I'd want back in my motor.
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04-17-2012
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#22
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Join Date: Mar 2005
Location: Blaine, MN
Drives: '91 Automagic
Posts: 13,908
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Re: Crankcase ventilation
Let us know how it goes with the chumpcar.
I believe summit sells a kit for cheap if something happens to that hose.
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04-18-2012
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#23
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Crankcase ventilation
Quote:
Originally Posted by Halon
You're putting it back into the block? Interested to hear how that works as everything I've ever drained out of my catch can doesn't look like anything I'd want back in my motor.
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It comes out of your crankcase.... And our car goes approximately 750 miles between oil changes. If that.
Edit, also i think with a daily driver you get a lot of condensation because the motor gets a lot of start/stops and cooling in between. On the race car everything in the catch can was basically pure oil, because it is run for 7/14/24/25 hours at a time... so very little water actually ends up in it.
__________________
Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
Last edited by s1ngletracker; 04-18-2012 at 09:44 AM..
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04-18-2012
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#24
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Pewp Champion
Join Date: Nov 2003
Location: Blaine
Drives: Teh Bean
Posts: 12,309
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Re: Crankcase ventilation
Yes it comes out of your crankcase, flying out of your crankcase as small airborne particals that have been mixed in with a lot of air and combustion gasses. Then it settles back down into your catchcan in an altered form as a substance that now looks more like baby barf than motor oil.
I'm no expert though, just my limited point of view and interested to see how that works out for you guys. Best of luck to ya!
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04-18-2012
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#25
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Join Date: Jul 2011
Location: Duluth
Drives: Turbo LSx FC RX-7
Posts: 147
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Re: Crankcase ventilation
For the record, I think Shane was right: I lifted the head.
I ordered L19s, a new PermaTorque HG and associated parts today.
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04-19-2012
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#26
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Crankcase ventilation
Quote:
Originally Posted by Halon
Yes it comes out of your crankcase, flying out of your crankcase as small airborne particals that have been mixed in with a lot of air and combustion gasses. Then it settles back down into your catchcan in an altered form as a substance that now looks more like baby barf than motor oil.
I'm no expert though, just my limited point of view and interested to see how that works out for you guys. Best of luck to ya!
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right, but like i said, when you've been running for hours in a race, the stuff that comes out of a catch can is pretty much just oil. At least on our car it is. That stuff is going to be mixed up with oil anyway, as it blends with sloshed up oil in your crankcase.
And since we were filling our quart catch can with oil every 2 hour stint, we'd also come in and have to top off the oil every time. Another step saved, and another safety measure to ensure we don't run it too low on oil.
Lots of people do drainbacks into the block, this isn't a new or revolutionary idea. Heck, the stock setup on our honda is essentially a baffle box with drainback into the block. That is what gave me the idea to do it this way.
Anyway, sorry to get off topic, but your original issue did sound like a headgasket problem anyway.
__________________
Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
Last edited by s1ngletracker; 04-19-2012 at 11:00 AM..
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04-19-2012
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#27
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aka Goodbye
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Re: Crankcase ventilation
Yeah, there's a huge difference between a daily driver and a race car in this respect. I'd drain it back into the block for racing as well, you shouldn't get any condensation in there.
__________________
2009 Corvette Z51-SOLD
1992 Mitsubishi Eclipse GSX-SOLD
2013 BMW Z4-Current summer hooptie
2017 GMC Yukon-Current winter hooptie
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04-19-2012
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#28
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formerly ecoli
Join Date: Oct 2003
Location: On the dyno
Posts: 4,892
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Re: Crankcase ventilation
Some of the catch cans for Subaru's have coolant running through them to keep the condensation from happening due to the drastic temp change of inside the motor vs outside.
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04-19-2012
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#29
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Pewp Champion
Join Date: Nov 2003
Location: Blaine
Drives: Teh Bean
Posts: 12,309
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Re: Crankcase ventilation
Interesting, cool well hopefully that works out for you then. Good to know if I ever have a dedicated race car. My race car experience is limited so I can only speak from a street car point of view.
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04-20-2012
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#30
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Join Date: Oct 2007
Location: Stevens Point WI
Drives: on ICE
Posts: 251
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Re: Crankcase ventilation
i've drained my catch can at the event right after a few laps. I still would not want to put that stuff back into my motor. I dont mind adding some fresh oil every 20 minutes. My car see's 3-4 laps at a crack, and is not street driven.
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04-20-2012
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#31
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N17r0U$ br4D
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Re: Crankcase ventilation
I've read about a lot of the big HP Honda guys draining the catch can back into the motor without any real problems. I've also remember reading about some dsm guys draining it back into the motor through the balance shaft check hole.
I wonder if you put some sort of easy to clean fliter before it drained back into the block if it wouldn't be so bad.
__________________
My rice rocket best times
Pump Gas: 8.85 @ 152.3 in 2016
Race Gas: 8.982 @ 152.16 in 2014
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04-23-2012
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#32
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Join Date: Oct 2005
Location: The land of the next-gen HMMWV
Drives: A BMW
Posts: 1,875
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Re: Crankcase ventilation
Catch can worked phenomenally. Paul, if you want more details on how I did it, let me know.
__________________
Style's automotive engineer
Sponsored by DB Performance (dbptuning.com)
A dsm, a bimmer, a DORGE CUMMINZ, and a non running DSM race car... for now.
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