Race Car PCV setups
Originally Posted by JL ws-6
I'd reccommend a catch can in with the factory PCV to stop oil from getting into the intake. I'm sure the engine's not gonna like that oil in the intake on the spray. The setup that you are talking about sounds like it should work well,let me make sure I have this right: you are gonna run a race style tube setup at the track, with a quick connect style setup for the hose that goes to the headers and valve covers, both that will be acpped for street use, and a check valve setup for the factory PCV for track use. I wonder if you could get a small ball valve or something that you could close off the factory PCV at the engine and the manafold for when you are at the track. May be easier with something like that. Just a thought, but overall sounds like you have a good way of having a race setup and a street setup that can be swapped in about 15 minutes, with minmal cost. Good engineering.
Originally Posted by Damian
If I remember correctly Tony ran open breathers on his MTI 434 motor and destroy the rings (or something along those lines)....
I really do not see it being practical to use pumps and such for the PCV system until it's an all out race car spraying HUGE shots of nitrous (large increase in pressure)
I really do not see it being practical to use pumps and such for the PCV system until it's an all out race car spraying HUGE shots of nitrous (large increase in pressure)
I ran breathers without a PCV system and the crankcase pressure on that 434ci was enough to keep blowing out the valve cover gaskets on track runs. After doing that twice, I re-installed the PCV system with a home made catch-can and the problem was solved.
Never had any problems with rings on that engine, just an occasional piston rod thru the side of the block. DOH!
(Bringing this one back up)
I think a h/c car stock bottom car might not need a Moroso pump but hey it will make a little power so why not.
I am FI and I am running a Metco breather on the passenger side valve cover, and nothing going back into the TB or intake inlets.
I bought a little Jaz Mini breather but I think it's going to be too small.
I'm looking to run a small catch can.
I wonder if I need to run two 3/8th hoses from each cover or can I loop the covers and run just one line. My guess is that one 3/8 hose would not be adequate.
I think a h/c car stock bottom car might not need a Moroso pump but hey it will make a little power so why not.
I am FI and I am running a Metco breather on the passenger side valve cover, and nothing going back into the TB or intake inlets.
I bought a little Jaz Mini breather but I think it's going to be too small.
I'm looking to run a small catch can.
I wonder if I need to run two 3/8th hoses from each cover or can I loop the covers and run just one line. My guess is that one 3/8 hose would not be adequate.
When I had my 422ci n/a setup, I ran an LS6 pcv system, one of the first on an F-Body, and it seemed to work okay. I did run a breather from the back of the passenger side to a remote setup I made.
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PSJ,
I would look at Y-ing the rear drivers side hose into the pass side hose and having it terminate in the pass side valvecover.
Then have a breather on the pass side oil fill cap. Plug the fresh air line at the T-body and plug off the PCV as the filter will provide a fresh air source on the fill neck filter.
Use larger than stock diameter hoses. Ideally a vac pump would be best for your setup or open headers with lines to the collectors. The pump would be hard to fabricate in your setup I bet with the big blower and everything else there.
I would look at Y-ing the rear drivers side hose into the pass side hose and having it terminate in the pass side valvecover.
Then have a breather on the pass side oil fill cap. Plug the fresh air line at the T-body and plug off the PCV as the filter will provide a fresh air source on the fill neck filter.
Use larger than stock diameter hoses. Ideally a vac pump would be best for your setup or open headers with lines to the collectors. The pump would be hard to fabricate in your setup I bet with the big blower and everything else there.
I pretty much have the setup you just described. I don't like the chimney. I want something more discrete and to the side.
I could mount a Moroso evac down in the a/c location but I'm not interested in doing one right now I just want a catch can.
I could mount a Moroso evac down in the a/c location but I'm not interested in doing one right now I just want a catch can.
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Verdad Gallardo Thread Starter
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You mean you want the stock oil cap back on and a remote mount filter?
You could do that pretty easily.
T the two lines just like you have them now. Run a line from the fresh air fitting on the pass side valve cover and remote mount a filter or breather catchcan on the end (keeping it vertical etc)
That would clean things up alot and look pretty much stock under the hood
You could do that pretty easily.
T the two lines just like you have them now. Run a line from the fresh air fitting on the pass side valve cover and remote mount a filter or breather catchcan on the end (keeping it vertical etc)
That would clean things up alot and look pretty much stock under the hood
Chris if I did that could I block off the pcv completely..
I already have the valve covers tee'd,I would just run a line over to a vented catch can from the fresh air and block off with the pcv.
I already have the valve covers tee'd,I would just run a line over to a vented catch can from the fresh air and block off with the pcv.
Hmm I need to be more specific.
I know I can do that setup Chris I want to see if anyone knows if for my FI setup the hoses have to be certain size? My concern is that dual 3/8 hoses might not be enuff for 750-800rwhp power levels. Evac setups using the Moroso appear to use -6 up to -10 for the their hoses.
I know I can do that setup Chris I want to see if anyone knows if for my FI setup the hoses have to be certain size? My concern is that dual 3/8 hoses might not be enuff for 750-800rwhp power levels. Evac setups using the Moroso appear to use -6 up to -10 for the their hoses.
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Originally Posted by Pro Stock John
Hmm I need to be more specific.
I know I can do that setup Chris I want to see if anyone knows if for my FI setup the hoses have to be certain size? My concern is that dual 3/8 hoses might not be enuff for 750-800rwhp power levels. Evac setups using the Moroso appear to use -6 up to -10 for the their hoses.
I know I can do that setup Chris I want to see if anyone knows if for my FI setup the hoses have to be certain size? My concern is that dual 3/8 hoses might not be enuff for 750-800rwhp power levels. Evac setups using the Moroso appear to use -6 up to -10 for the their hoses.
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Absolute vacuum is just under 30in/Hg. Don't use anymore than 15in/Hg, maybe 12in/Hg. You'll pull oil off the rockers or bearings with too much vacuum. I kind thought most belt driven vacuum pumps were only good (or at least at max capacity) for like 100 hours use before rebuild time..meaning not particularly suited for continuous street use. I guess Moroso could advise best on that issue..
Originally Posted by FrankTHutchens
Absolute vacuum is just under 30in/Hg. Don't use anymore than 15in/Hg, maybe 12in/Hg. You'll pull oil off the rockers or bearings with too much vacuum. I kind thought most belt driven vacuum pumps were only good (or at least at max capacity) for like 100 hours use before rebuild time..meaning not particularly suited for continuous street use. I guess Moroso could advise best on that issue..
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From: new england
I use a Fbody electric air pump for a evac pump, i toggle it on from driver seat when im racing. It sits on passenger side on top of motor, there is a great spot for it there. I tap into stock pcv system where pcv connects to the tubing that runs to both valve covers. I run pcv valve and line into oil fill cap that i modified with baffling(inside). The Evac air pump is easily wired and pulls around 3 inces of vacuum. It was worth 7rwhp over stock pcv system and it works great to stop oil suction into intake, BTW i use stock connection on vent side of system. I think this is a great answer to belt driven air pump, even if its not worth as much hp as it.
