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Re: [Spridgets] To vent or not to vent

To: Jim F. <jimndi@frontiernet.net>, Trevor Jessie
Subject: Re: [Spridgets] To vent or not to vent
From: "Robert E. Shlafer" <pilotrob@webtv.net>
Date: Sun, 22 Mar 2009 16:45:16 GMT
When it comes to venting the Series A, the more than merrier.

That 1/8" "orifice" tip on emissions valve cover was originally for crankcase 
inlet air off a carbon canister. Clip off the end and you've a 1/2" crankcase 
vent line for a little easier crankcase breathing overboard or  to your carb 
filters.

Your routing to the "emission" carbs from the timing cover flame arrestor is as 
it should be, however....

most 1275 blocks (except the '67 "thin flange" types) have a plate over the 
original crankcase mechanical fuel pump port. This is a 1" "vent", because of 
it's size REALLY relieves crankcase pressures IMMENSELY. Additionally, you'll 
get far less crankcase vapor through the flame arrestor running through the 
carbs and into the combustion process once this port is opened as well. Simply 
fabricate a fitting and attach a 1" tube/hose or whatever.

It can go overboard through a mini filter (the crankcase "breathes" both ways) 
or
into a proprietary catch can or one  you can make up from a windshield washer 
bottle, coke can, etc.

Cap'n. Bob      '60 :{)
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