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  #1 (permalink)  
Old 12-10-2006, 08:40 AM
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Join Date: Dec 2003
Location: Gurnee, IL
Cobra Make, Engine: Kirkham #259
Posts: 1,396
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Mark

We had to get into this issue from the dyno to the chassis.....

If you are going to just be on the street ....it will probably work OK.....

But the minute you get on a track..... the pressure inside the block moves very fast and there is a large volume of air to move.....

With your line....the speed of the air is so fast that it will plug up the filter arrangement you have ...... and if you make the can or filter larger....the speed of the air inside of the container will slow down ....but then speed back up as it tries to exit......

When the air slows down inside of the container ...it will be depositing the oil on the filter and end up plugging up the filter ......

Your lines need to be large so the speed of the air will be much slower and not push the oil out of the motor.... and the container needs to be larger and if you want to use a screen ...use a Scavenge pump type of filter that has a screen in it but not a close knit screen....one that is open like 1/8" holes...... that will break up the oil and air and because the air is traveling so slow it falls back into the motor....

We ended up running a -12 line at the back of the block.... to the breather....and a -12 line from the bottom of the motor at the mechanical fuel pump block off plate to the breather can ....it had one of those Scavenge filters inline before the Breather container.....

Here's a photo

Morris

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