Message-ID: <4033BF0A.3060900@yahoo.com>
Date: Wed, 18 Feb 2004 14:37:46 -0500
From: Scott Stout <squiggles@yahoo.com>
Reply-To: squiggles@yahoo.com
Organization: The Stout's Zenith 801
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To: flyrotary@lancaironline.net
Subject: Intakes...
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I need to throw a stake in the ground and start somewhere on the intake, 
thus...

So, I have a NA 6-port 13b, suitably ported and  modified by Bruce T.  
Now, I'd like for the DIE effect to settle in on my cruise RPM say 
4800-5200, hopefully this range represents a reasonable balance between 
power and economy.   This intake would be using 2 runners, one for the 
primaries and the other for the secondaries,  from what I've been able 
to gather the primary port to port length should be in the 40inch range 
and the secondaries should be in the 55inch range.

So, I've got 4 tubes and a throttle body somewhere in the middle of the 
4 tubes.  Port to port on the outer is 55 inches and the inner is 40 inches.

Anything horribly wrong so far?

Moving on, instead of having the intake hang 90 degree turn to get into 
the the engine block, the runners go straight out 5 or 6 inches, then do 
a 180 and double back to the throttle body.  Do the bends in the intake 
come into play for DIE?  Do I gain anything like say air velocity by not 
doing the 90 turn at the engine block?

With regards to throttle body's, does it affect DIE by having a throat 
larger than the intake runners?  By this I mean does having a single 
larger throat, vs. say 4 smaller throats have an effect.

How much does it matter where the injectors are mounted?  Instead of 
leaving the injectors on the engine block, all 4 are mounted 
equi-distant from the ports.

I am sure this will not be the last intake fabricated, I'd like to get a 
reasonable intake fabricated which might not be the best for my 
application, but at least it won't be the worst.  Thus, allowing me to 
move on to the next challenge...

Thanx...

-Scott