Intake runner sizing..

[Graydon D. Stuckey]

On Wed, 21 Feb 1996, Craig Pugsley wrote:

> > 	Personally, I think those 6-port valves are more restrictive than 
> > they are worth.  I would take them out, and fab up variable length intake 
> > runners.  Then you can tune all the runners for all rpm ranges.
> 
> Not a 6 port, it's a 4 port (R5?? housings) - Japanese spec engine.
> 
> Variable intake length would be fun - could you have the butterflys in a
> fixed position and use variable length trumpets, or do you mean variable
> length by changing it with several butterflys to turn on/off extra
> tubing. Hmm.. so if I had 4 feet of tube would the torque peak be at
> idle?? :-) (It's an automatic).
Craig,

	I would get rid of the butterflies entirely, and vay the tuning 
by changing the length of the runners.

Later,								
Graydon D. Stuckey								
graydon at apollo.gmi.edu								
Flint, Michigan   USA
'86 Audi 5000 CS Turbo Quattro, GDS Racing Stage II				
'85 Mazda RX7 GS 12A-leaning-towards-a-13B-soon