Jim Sower wrote:

<... a simple way to cut down on the amount of fuel/air mixture during idle ... yet have plenty of reserves at redline rpm ...>
So why do I need primarys and secondarys with different lengths that screw up DIE and generally make life more difficult?
There must be more to this than meets the eye ... Jim S.

According to the graphs Ed distributed after the presentation, on the 1990 Turbo and street ported 1991 Turbo II  their primary and secondary runners can be identical lengths.

On the 1988 NA the secondary port runners should be about 4 inches longer than the primaries. This presumably is for a non-street ported engine. Any porting will dramatically alter the required lengths.

Come on, Ed. Help me out here!

Finn