Jerry Hey wrote:

Paul,  I share the enthusiasm for the Russell intake. However,  Ed came
up with a good idea for the cross over intake  that you should
consider.  Simply put, cross the 180s by giving one a two inch longer
leg coming out of the engine.  Doing so you can lay them down flat.
Then add the two inches back at the other end before the plenum.
Jerry

I am not sure I follow that. Seems to me one tube would be longer
than the other by 2" or there would be a 2" offset at the plenum end.
Not a big problem as you could make the plenum wider. 

By "lay them down flat" you mean the aft runner is 
touching the top of the front rotor housing and the front runner is 
touching the the top of the aft rotor housing I think?  That would 
also put the front tube much closer to the cowl top surface.

There is another problem with the up and over
manifold that I have been ignoring so far. There is some minimum length
around 23 inches due to the 3" center line 180 bend (8.352" long by itself) 
and the clearance needed for the plenum. For a 2.85:1 7500 RPM  gear box 
that is too long. Another advantage of the Russell manifold so far not discussed
is you don't have to modify the oil filler, breather or the dip stick.

BTW is Russell wants to disown it we could call it the "Plenum Forward" :)

Paul Lamar
 
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