I did something very similar on my 1500. I previously added an electric
fuel pump and fuel pressure regulator when I changed my carb to the 32/36
Weber and Canon manifold. I made a plate with a 1/2 inch diameter threaded
pipe to cover the mechanical fuel pump opening. I then added a 90 deg.
elbow and a reducer to attach a 3/8 in. dia. hose that goes to a PCV valve
that I added to the manifold. (I drilled and tapped the spotface already on
the manifold.) The carb. now stays clean as air is routed to the engine
through the valve cover, and any blowby gasses are vented from the new port
and reintroduced into the intake manifold (like in more "modern" engines).
I did not add a separator bottle to catch oil (hardly any comes through as
judged by my virtually clear exhaust), nor did I vent the line to the
atmosphere (the emmission testers frown on that). I am happy to report that
the car passed the emmission test that we now have in the Atlanta area with
no problems.
Michael Altomare
'77 Spitfire 1500
Kennesaw, GA
-----Original Message-----
From: HD883HUGGR@aol.com <HD883HUGGR@aol.com>
To: spitfires@autox.team.net <spitfires@autox.team.net>
Date: Wednesday, November 03, 1999 1:01 PM
Subject: return of Excess Crancase Pressure thread...
>
>Hi Gang -- me again. I finally got a chance to look at Tom Shirley's page
>with Joe Curry's tip regarding excess crankcase pressure after removing
>emissions garbage. Here's the meat of his sage advice (reproduced without
>permission -- hope that's okay, Joe & Tom):
>
> "If the car has an electric fuel pump, the port on the block makes a
>great place to mount a blow-by relief port. Fabricate a cover plate with a
>pipe the same size as the one on the valve cover. Connect a hose to this
pipe
>and bend it upward to the top of the valve cover and then downward into a
>vented catch bottle. Pressure being built up in the crankcase will be
vented
>into the catch bottle trapping any oil that is carried with it. Most oil
>escaping the block will be trapped in the hose and run back down into the
oil
>pan.
> "If the hose from the valve cover has been disconnected from the
>carburetor, relief valve or carbon canister (as applicable), it can be tied
>into the catch tank using a "T" fitting as used on some variations of this
>engine. The carbon canister makes an excellent catch tank if it is no
longer
>being used in its intended configuration."
>
> Being mechanically illiterate, I'm a tad confused... currently I have a
>mechanical fuel pump. I have an aluminum valve cover with a straight hose
>coming out of the valve cover and into the Weber carb with no PCV valve
that
>I can see. So do I need to replace the fuel pump in order to try Joe's
>system? Or does the crankcase breathe up into the valve cover enough that
a
>T from the VC-to-Carb hose might do the trick? Or is there another place I
>can vent the crankcase? Help!
> As always, many thanks for the assistance.
>Scott (& Hobbs, the smoke-breathing dragon...)
>
>
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