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Old 02-12-2013, 07:46 AM   #21
Dave Gantz
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Default Re: Crankcase Ventilation

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Originally Posted by GTX JOHN View Post
I tried a road draft tube on my 340 about Fifteen years ago and first race they
made me pull it right off!!
I guess it depends on the year of the car? What was the last year they used them, '66?
Anyhow, I thought about that after I posted that. Our car was a '71, so I guess it wouldn't have been legal, either.
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Old 02-12-2013, 10:04 AM   #22
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Default Re: Crankcase Ventilation

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Originally Posted by BowtieFroggie View Post
That the turned around rear main seal was a Manley deal when the had the pistons with the rubber o-ring as part of the oil ring

Yes, yes it's all comming back to me now ! Was that for the single ring piston that was being experimented with. I believe one of my friends went to a Manley seminar back then and thought this new style ring ,piston combination was going to be " to die for" ed
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Old 02-12-2013, 11:35 AM   #23
Mark Yacavone
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Default Re: Crankcase Ventilation

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Originally Posted by Dave Gantz View Post
I guess it depends on the year of the car? What was the last year they used them, '66?
Anyhow, I thought about that after I posted that. Our car was a '71, so I guess it wouldn't have been legal, either.
That would be 1962 Fed. and 1959 Ca. I believe
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Old 02-12-2013, 12:34 PM   #24
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Default Re: Crankcase Ventilation

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Originally Posted by FED 387 View Post
Late 60's-early 70's GM Power brake check valve on the valve cover & then hose to the intake manifold and DO NOT forget to turn the main seals around!!!-- FED 387
It's hard to see in my photo, but the brake booster check valve is there. I've run the seals backward but didn't see a gain in vacuum on the gauge. I was recently told that the seals only needed to be turned when using a pump. If I install a puke tank designed for a pump, do you think it would fix my oil in the intake problem?
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Old 02-13-2013, 07:45 AM   #25
Dave Gantz
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Default Re: Crankcase Ventilation

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That would be 1962 Fed. and 1959 Ca. I believe
Yikes! I are getting to be an old fart. I remember seeing cars on lifts that while running, you could see the smoke billowing out of the tube. I guess '66 was wishful thinking.
It's ironic though, the stuff that's allowed these days, and you show up with a draft tube and yer out!
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Old 02-13-2013, 09:08 AM   #26
eddie c
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Default Re: Crankcase Ventilation

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Originally Posted by Dave Gantz View Post
Yikes! I are getting to be an old fart. I remember seeing cars on lifts that while running, you could see the smoke billowing out of the tube. I guess '66 was wishful thinking.
It's ironic though, the stuff that's allowed these days, and you show up with a draft tube and yer out!
Me to, for every stroke you could see a little puff of smoke from the draft tube. ed
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Old 02-13-2013, 09:36 PM   #27
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Default Re: Crankcase Ventilation

I have tried several theories at the track and confirmed some of them on the dyno. Brake booster valves are not created equal. There is dyno proven power here if you work for it. Mine will suck the bottom of the pan up against the pickup. You have to "release" the vacuum for the oil to drain. Then you'll know your close!

Wade
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Old 02-13-2013, 10:58 PM   #28
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Default Re: Crankcase Ventilation

would love to have some feed back or "hint" on the correct brake booster check valve!!!!......late 60's???.....early 70's????......I need this junky 275hp 327 of mine to pick up!!!!
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Old 02-13-2013, 11:49 PM   #29
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Default Re: Crankcase Ventilation

The brake booster valve I'm using is a 1970 GM version. It just allows air to go in one direction. I don't know why one would be more beneficial than another, but I'll look into it.
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Old 02-13-2013, 11:59 PM   #30
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i think your refering to a check valve that is screwed into your header.......brakebooster check valve is plastic and similar to a PCV valve in size
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