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Gas\Diesel Engine & Transmission:

bbc pcv valve?



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Old 10-12-2009, 07:23 PM   #1
Wheelin MadMan
 
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bbc pcv valve?

man i sure do feel stupid asking this question but im mind blank and wanna get it right the first time. ok im building a bbc for my truck, i bought some moroso fab alluminum valve covers. they have no holes for pcv or oil. could i get away with only one pcv valve running to a vaccum on the carb or should i have that plus one on the opposite valve cover as a breather? as for the oil cap i can just pull a pcv valve and dump it there. thanks for advice in advance guys.
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Old 10-12-2009, 08:04 PM   #2
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You only need one PCV valve. Either valve cover will work.

I don't like to run them to the bottom of the carb though. I prefer to run them to the outside of the air filter. But either way is OK.
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Old 10-12-2009, 08:28 PM   #3
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ok cool thanks for the info. i was told i need one for pcv and another for " pcv intake"? is this true or can i get away with one. i hate to drill any more holes than i need to in these pretty covers. . also do you know where i might be able to get some baffles? i need some low profile ones i only have about 3/4" of space at max
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Old 10-13-2009, 05:20 AM   #4
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Sounds like you should put the stock covers back on and save all the headaches. Chrome don't get ya home.
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Old 10-13-2009, 09:35 AM   #5
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hey if you can get the stockers to fit over my valvetrain be my guest. hell i know chrome dont get you home, it dont get you anywhere, but alluminum will take you far
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Old 10-14-2009, 05:15 AM   #6
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OK hears the deal The PVC valve should be in the drivers side cover, and a vent on the other side is most common. The reason for this is I'm told has to do with windage inside the engine.

http://www.summitracing.com/parts/MOR-68790/ This is a bolt on baffle kit.
http://www.summitracing.com/parts/BSP-RP956034/ This is a baffle kit also.

The best thing to do is install a Crankcase evacuation system. Your not sucking anything except fuel and air into the engine instead of oil and stuff from inside the engine. Take a look at this most race applications use something similar. I have used it on my drag car and it works good, you can buy the valves at the parts store and piece it together but there's something to be said for a kit!
http://www.summitracing.com/parts/SUM-120108/
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Old 10-15-2009, 07:21 AM   #7
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awesome thanks for the info bud. now one more thing. where does that crnk evac system go i have never seen one before. do you have any pics installed on yours?
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Old 10-16-2009, 06:45 AM   #8
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Boy I don't have a picture and have sold the race car. The kit would come with instructions i would hope but . The small tubes with the angle cut go in the headers (the position of the angled end is important as this is what causes the vacuum)just before the collectors. then the one way valves then a rubber tube runs up to the valve covers, then the oil caps if thats what you want to call them. Do you know an drag racers?? They would know about this system.
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Old 10-17-2009, 06:20 PM   #9
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The pan evac. system is for race car's
that run high rpm's
That system will not work right at low rpm's.
Put a normal pcv valve in the driver side with a vent
from the other to the air cleaner and your rear main seal will thank you.
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Old 10-18-2009, 07:05 AM   #10
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Quote:
Originally Posted by skydive View Post
The pan Eva. system is for race car's
that run high Rom's
That system will not work right at low Rom's.
Put a normal PVC valve in the driver side with a vent
from the other to the air cleaner and your rear main seal will thank you.

You are untitled to your opinion. How did you come to this decision anyway? Heres proof that it will work at low RPM, with a full muffler system, watch the video and you decide. I try not to give out bogus information and maybe you should do a little more research yourself before you give out tec advice.

http://www.youtube.com/watch?v=wGrx2rvIxJ0


Go ahead and put it on you truck it will work fine!
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Old 10-18-2009, 06:00 PM   #11
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Old 10-19-2009, 05:34 AM   #12
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25 year's running drag car's enough research ?
I didn't say it wouldn't work I said it wouldn't
work right at low rpm's.
but hey you seem to be the PCV guru.
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Old 10-19-2009, 06:59 AM   #13
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Were not talking about a drag car. Did ya watch the video?? How low of a rpm are you talking idle 1000 2000 ?? It looked like it was working to me.
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Old 10-19-2009, 08:02 AM   #14
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WOW, one video and that's all the proof you need?? I searched google real quick just because I was curious, and saw a 50/50 opinion on this working well with full exhaust/ low rpms. I would do a lil research before going that route, may be more trouble than its worth..
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Old 10-19-2009, 07:11 PM   #15
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dang yall gettin all worked up over this lol just kiddin. i called moroso and gave them all i was runnin they said the most common way is just to run a pcv vaccum and a breather as a vent on the opposite valve cover, which is what i usually ran but i was double checking because this motor is my new pride and joy.
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Old 10-20-2009, 07:02 AM   #16
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Old 10-29-2009, 08:31 PM   #17
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ya ya ya
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