Crankcase Ventilation

[FED 387]

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

[GTX JOHN]

I tried a road draft tube on my 340 about Fifteen years ago and first race they
made me pull it right off!!

[Dave Gantz]

Originally Posted by GTX JOHN

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.

[Mark Yacavone]

Originally Posted by Dave Gantz

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

[Dave Gantz]

Originally Posted by Mark Yacavone

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!

[eddie c]

Originally Posted by Dave Gantz

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

[Wade_Owens]

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

[eddie c]

Originally Posted by FED 387

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

Yes, That was another trick,You were supposed to run the front crank seal backwards and also, if possible, turn around your rear main seal.
ed

[eddie c]

Originally Posted by BowtieFroggie

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

[Bobby DiDomenico]

Originally Posted by eddie c

Yes, That was another trick,You were supposed to run the front crank seal backwards and also, if possible, turn around your rear main seal.
ed

Can you actually pull enough where the seals would become an air leak?
I was guessing this is mostly extra carburetor cfm, just not using hollow bolts n things.