Vacuum pump or not on the street?
Vacuum pump or not on the street? Running and 80 mm T6 turbo with a 6 L on E 85 what you guys suggests? Vacuum pump or catch can, or something Else. Mainly Street, driving with very little track time.
What info are you looking for? Vacum pump-Cost more and I've only put a few thousand miles on it, so it seems to be holding up well. Catch can setups I don't like on anything above @800hp although they work. I prefer just using a #10 or #12 off of each valve cover to something like a Moroso Breather can or cans on high HP cars $800+ rwhp.
TECH Apprentice
Joined: Jan 2014
Posts: 362
Likes: 1
From: Torrance Ca
hey oscs,
i always see you talking alot about how you should have gone with an exhaust evac system, what are the benefits? Im building my car right now and i cant decide what i would like to use, a catch can or an exhaust system. Why do you prefer exhaust? And what parts would you get to set it up?? thanks
i always see you talking alot about how you should have gone with an exhaust evac system, what are the benefits? Im building my car right now and i cant decide what i would like to use, a catch can or an exhaust system. Why do you prefer exhaust? And what parts would you get to set it up?? thanks
hey oscs, i always see you talking alot about how you should have gone with an exhaust evac system, what are the benefits? Im building my car right now and i cant decide what i would like to use, a catch can or an exhaust system. Why do you prefer exhaust? And what parts would you get to set it up?? thanks
With all that said I am running a catch can and it seems to be working ok. Had I been a little more educated and paid attention to CCV during my build I would have went with an exhaust evac setup. This summer when I get bored I'm going to swap over. I can use all the room I can get in my engine bay.
Last edited by oscs; Dec 12, 2014 at 02:40 PM.
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I looked at the exhaust evac's years ago @ 2002. I know it was traditionally something the drag only cars did and works well with open headers etc... Never tried it due to the fact I wasn't sure how they would work on a car with a full exhaust system etc... Same goes for my turbo's and putting them on the DP's. So I went with a Vacum pump setup and before that it was to a breather can setup. I didn't want to be a test subject on that particular thing is all.
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We have one on an LS9 turbo setup (block with everything else changed). It's the GZ Motorsports unit. Not a drop of oil in the intake after 1K miles.
The catch can has a bunch of moisture in it since it runs only on e85.
Runs around mostly on about 800rwhp. Can turn it up to well over 1000rwhp. It also helps with ring seal/blow by/add'l hp.
The catch can has a bunch of moisture in it since it runs only on e85.
Runs around mostly on about 800rwhp. Can turn it up to well over 1000rwhp. It also helps with ring seal/blow by/add'l hp.
On The Tree
Joined: Jan 2013
Posts: 193
Likes: 1
From: The land of sun n' sand
Interesting topic guys.....I have a question tho....how would you plumb a exh. evac. system on a turbo car...?
This is what I'm thinking both banks to exh. after turbo ?.......and I'd then mount the widebands pre turbo.
This is what I'm thinking both banks to exh. after turbo ?.......and I'd then mount the widebands pre turbo.
Widebands are post turbo. I have mine 10-12" from the turbo. The exhaust evac is the same concept only it doesn't really matter how far back from the turbo you place it. Most I've seen ended up being a few feet after the turbo.
Staging Lane
Joined: Jan 2012
Posts: 50
Likes: 0
I just run a vented catch can. Twin turbo, only puke out a tablespoon in a 1000 miles. Oil has always looked and smelled fine with e98.
I think people forget gm doesn't apply any real measureable vacuum to the crankcases, just flows the air into the intake track. Like the ls3, the port that goes to the intake is restricted down to a hole the size of a pen with the other side open to intake tube.
I think people forget gm doesn't apply any real measureable vacuum to the crankcases, just flows the air into the intake track. Like the ls3, the port that goes to the intake is restricted down to a hole the size of a pen with the other side open to intake tube.
Do it right and it will never clog. It's a one way valve.. Not real complicated. Hell my 7.3 has far more carbon build up in the exhaust amd probably 3X the blow by the gas motor makes and I've been running one for years with no issue. I'm really curious how you managed to clog yours. Last edited by oscs; Dec 15, 2014 at 02:26 PM.
Well I'm sure I wouldn't recomend it if my product wasn't designed to see everyday service either. But I'm not saying that everyone should go out and get one lol! And for 99% of the ppl vented catch cans is what I'd recomend as well. But running one every day isn't an issue if your not pulling a ton of vacum to mess with your oil delivery. And so far I've had less oil leaks and the oil smells and looks cleaner than when I was running it with vented catch cans. I tried it as just to try it. And I like how its working for ME. The OP asked for opinions and I gave mine that its really a cost factor, and definately not a need.