road draft tube

[Paul Voyles]

I am putting together a 400 ci small block for my 1964 Corvette, and would like to run the original valve covers. I know the motor has to be vented in some manner, and have read most of the past posts regarding this. There was an article in Hot Rod Magazine, July 1996, page 92-94, regarding a system used on a 1963 Nova, by Mothers Polishes and Wax. It looked like a slick way to vent a later block. It consisted of drilling a 3/8 hole in the back of the block, and having a couple of tubes with holes drilled in them, to seperate the oil and vapors, before being vented out the rear of the block. I was wondering if it would be effective, if a tube was extended to the bottom of the motor, and if anyone had any specs as to how to accomplish this. Anyone have any ideas on this?
Thanks,
Paul

[John H.]

Re: road draft tube

Paul -

Try this - http://forums.corvetteforum.com/zerothread?id=493303

[Shannon Burgess]

Re: road draft tube

Here's another post from "over there" that shows a PCV in the intake manifold.

http://forums.corvetteforum.com/zerothread?id=150178

[Mike McKown]

Re: road draft tube

Looks like "Sludge City" to me. Won't work, no circulation.

[Mark F.]

Re: road draft tube

Paul:

I installed a late model 350 block in my '64 Chevelle SS, equipping the motor with '64 461 heads, 461 intake, Holley carb, and L-76 air cleaner. Not wanting to drill into vintage Chevrolet parts, such as the manifold, etc., I had the same problem with the lack of a road draft tube.

I took Charley's (Chicago Corvette) advice, and drilled a 3/8" hole the thinnest part of the back of the block just below the distributor, installing a right angle fitting, and ran a PCV hose to a "T" fitting underneath the air cleaner, where it met the PCV hose from the oil inlet in the front of the manifold. The two hoses met at the 180 degree outlets of the "T" fitting, with the right angle outlet of the fitting inserted into the base of the air cleaner. The fitting barely showed to the casual observer.

To increase air intake into this jerry-rigged system, I ran a breather-type oil cap on the oil tube at the front of the manifold. For shows, I'd change to the non-breather cap. Worked great for the two years I drove this car before I sold it to buy a Covette. Didn't look bad, either.

Mark